UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                   FORM N-CSR

                   CERTIFIED SHAREHOLDER REPORT OF REGISTERED
                        MANAGEMENT INVESTMENT COMPANIES



		Investment Company Act file number 811-21321

                       Pioneer Municipal High Income Trust
               (Exact name of registrant as specified in charter)


                       60 State Street, Boston, MA 02109
              (Address of principal executive offices) (ZIP code)


            Terrence J. Cullen, Amundi Pioneer Asset Management, Inc.,
                       60 State Street, Boston, MA 02109
                    (Name and address of agent for service)


Registrant's telephone number, including area code:  (617) 742-7825


Date of fiscal year end:  April 30


Date of reporting period:  May 1, 2017 through April 30, 2018


Form N-CSR is to be used by management investment companies to file reports with
the Commission not later than 10 days after the transmission to stockholders of
any report that is required to be transmitted to stockholders under Rule 30e-1
under the Investment Company Act of 1940 (17 CFR 270.30e-1).  The Commission may
use the information provided on Form N-CSR in its regulatory, disclosure review,
inspection, and policymaking roles.

A registrant is required to disclose the information specified by Form N-CSR,
and the Commission will make this information public. A registrant is not
required to respond to the collection of information contained in Form N-CSR
unless the Form displays a currently valid Office of Management and Budget
("OMB") control number. Please direct comments concerning the accuracy of the
information collection burden estimate and any suggestions for reducing the
burden to Secretary, Securities and Exchange Commission, 450 Fifth Street, NW,
Washington, DC 20549-0609.  The OMB has reviewed this collection of information
under the clearance requirements of 44 U.S.C. ss. 3507.


ITEM 1. REPORTS TO STOCKHOLDERS.


                        Pioneer Municipal High
                        Income Trust

--------------------------------------------------------------------------------
                        Annual Report | April 30, 2018
--------------------------------------------------------------------------------

                        Ticker Symbol:   MHI

                        [LOGO]   Amundi Pioneer
                                 ==============
                               ASSET MANAGEMENT


                        visit us: www.amundipioneer.com


Table of Contents


                                                                           
President's Letter                                                             2

Portfolio Management Discussion                                                4

Portfolio Summary                                                             10

Prices and Distributions                                                      11

Performance Update                                                            12

Schedule of Investments                                                       13

Financial Statements                                                          23

Financial Highlights                                                          26

Notes to Financial Statements                                                 28

Report of Independent Registered Public Accounting Firm                       38

Additional Information                                                        40

Trustees, Officers and Service Providers                                      42


                 Pioneer Municipal High Income Trust | Annual Report | 4/30/18 1


President's Letter

While 2017 delivered strong positive performance, 2018, thus far, has introduced
market volatility. Equity and fixed-income markets pulled back in the first
quarter of this year, as the Standard & Poor's 500 Index and the Bloomberg
Barclays U.S. Aggregate Bond Index both finished in negative territory,
returning -0.76% and -1.46%, respectively, for the three-month period ended
March 31, 2018. Concerns about the sustainability of the pace of economic
growth, extended equity valuations, and rising interest rates drove a
significant stock market sell-off beginning in late January, approaching
correction levels. The market did recover from its initial slump, but this
year's significant fluctuations have served to remind investors that even the
strongest "bulls" cannot run forever. Within fixed income, rising interest rates
helped drive down returns of most asset classes in the first quarter, though
floating-rate sectors such as bank loans fared well in the rising-rate
environment.

Our view is that the first-quarter pause in the market's near-continuous upward
momentum over the previous 15 months, dating back to the final quarter of 2016,
presents an opportunity for investors to enter the market at healthier valuation
levels. We believe fundamentals are still quite positive, yet also believe that
caution is warranted given that the market remains vulnerable to corrections.
Some areas, such as growth stocks, appear expensive, but we do see opportunity
in value stocks, with prices supported by better corporate earnings due to the
recent tax reforms in the U.S. as well as robust, nominal gross domestic product
(GDP) growth. In fact, GDP growth in the U.S. rose to close to or better than 3%
over the final three quarters of 2017, and GDP growth in the first quarter of
2018 registered at 2.3%.

In the fixed-income markets, we believe investors should consider positioning
their portfolios to defend against rising interest rates, with underweight
positions in U.S. Treasuries. We see more attractive valuations within
structured investment vehicles, such as mortgage-backed securities (MBS) in both
the agency and non-agency residential MBS sectors, as fundamentals within the
U.S. housing market remain positive. We believe that agency MBS, in particular,
offer investors reasonable value.

Since 1928, the foundation of Amundi Pioneer's investment approach has been
active management, which is especially important during periods of market
volatility. We believe investors can benefit from the experience and tenure of
our investment teams who make active and informed decisions across our funds. In
fact, the Pioneer Fund, the third-oldest mutual fund in the U.S., recently
celebrated its 90th birthday. We believe the Fund serves as an important
ambassador of our time-tested value style of investing and our early focus on
understanding the potential benefits of investing in companies with

2 Pioneer Municipal High Income Trust | Annual Report | 4/30/18


sustainable business models. Over its nine decades of existence - a time period
that included a Great Depression, a devastating World War, a long Cold War, and
enormous technological as well as societal changes - the Fund has been
well-served by this investment approach.

As always, and particularly during times of market uncertainty, we encourage you
to work with your financial advisor to develop an overall investment plan that
addresses both your short- and long-term goals, and to implement such a plan in
a disciplined manner.

We greatly appreciate the trust you have placed in us and look forward to
continuing to serve you in the future.

/s/ Lisa M. Jones

Lisa M. Jones
Head of the Americas, President and CEO of U.S.
Amundi Pioneer Asset Management USA, Inc.
April 30, 2018

Any information in this shareowner report regarding market or economic trends or
the factors influencing the Trust's historical or future performance are
statements of opinion as of the date of this report. Past performance is no
guarantee of future results.

                 Pioneer Municipal High Income Trust | Annual Report | 4/30/18 3


Portfolio Management Discussion | 4/30/18

The municipal bond market generated positive results over the 12-month period
ended April 30, 2018, with high-yield municipals outperforming investment-grade
municipals. In the following interview, David Eurkus and Jonathan Chirunga
discuss the factors that influenced the performance of Pioneer Municipal High
Income Trust during the 12-month period. Mr. Eurkus, Managing Director, Director
of Municipals, U.S., and a portfolio manager at Amundi Pioneer Asset Management,
Inc. ("Amundi Pioneer"), and Mr. Chirunga, a senior vice president and a
portfolio manager at Amundi Pioneer, are responsible for the day-to-day
management of the Trust.

Q    How did Pioneer Municipal High Income Trust perform during the 12-month
     period ended April 30, 2018?

A    Pioneer Municipal High Income Trust returned 3.53% at net asset value (NAV)
     and 0.87% at market price during the 12-month period ended April 30, 2018.
     During the same 12-month period, the Trust's benchmarks, the Bloomberg
     Barclays U.S. Municipal High Yield Bond Index and the Bloomberg Barclays
     Municipal Bond Index, returned 5.79% and 1.56%, respectively. The Bloomberg
     Barclays U.S. Municipal High Yield Bond Index is an unmanaged measure of
     the performance of lower-rated municipal bonds, while the Bloomberg
     Barclays Municipal Bond Index is an unmanaged measure of the performance of
     investment-grade municipal bonds. Unlike the Trust, the two indices do not
     use leverage. While use of leverage increases investment opportunity, it
     also increases investment risk.

     During the same 12-month period, the average return (at market price)
     of the 14 closed-end funds in Morningstar's High Yield Municipal Debt
     Closed End Funds category (which may or may not be leveraged) was -0.62%,
     and the average return at NAV of the 14 closed-end funds in the same
     Morningstar category was 4.08%.

     The shares of the Trust were selling at a 10.0% discount to NAV on April
     30, 2018. Comparatively, the shares of the Trust were selling at a 7.6%
     discount to NAV on April 30, 2017.

     On April 30, 2018, the standardized 30-day SEC yield of the Trust's shares
     was 3.43%*.

*    The 30-day SEC yield is a standardized formula that is based on the
     hypothetical annualized earning power (investment income only) of the
     Trust's portfolio securities during the period indicated.

4 Pioneer Municipal High Income Trust | Annual Report | 4/30/18


Q    How would you describe the investment environment in the municipal bond
     market during the 12-month period ended April 30, 2018?

A    A favorable backdrop continued to support the municipal bond market over
     the 12-month period, as both economic fundamentals and technical factors
     helped municipal debt turn in positive performance. Favorable fundamentals
     included a persistently growing economy with improving corporate profits,
     low inflation, and a U.S. Federal Reserve System (the Fed) that acted to
     gradually tighten monetary policy. Over the period, the Fed raised the
     federal funds rate three times, in June 2017, December 2017, and March
     2018.

     In 2017, longer-term interest rates were gradually falling and short-term
     rates rising, with the yield curve flattening. Demand for fixed-income
     instruments, including municipal bonds, was steady, as investors continued
     to search for yield in a generally low-rate environment. As 2017 drew to a
     close, the U.S. economy posted stronger results, with unemployment falling
     to 4.1% and inflation remaining low and stable. Up until December,
     municipal security issuance was fairly light.

     However, the possibility of the first major overhaul to the U.S. tax code
     since 1986 loomed large during the fourth quarter of 2017, and uncertainty
     over the content of the new tax package roiled the municipal market. When
     the legislation was finalized in December, one of its provisions had a
     heavy impact on "advance refunding" bonds within the municipal market.
     Advance refunding refers to when one municipal bond issuance is used to
     pay off another outstanding municipal bond. The new bond is issued at a
     lower interest rate than the older, unpaid obligation. Municipalities
     typically use advance refundings to reduce borrowing costs and to take
     advantage of lower interest rates. However, under the new tax law, after
     December 31, 2017, interest on a municipal bond issued to advance refund
     another municipal bond more than 90 days prior to the refunded bond's call
     date is no longer tax exempt.

     While interest on refunding bonds issued within 90 days of the original
     municipal bond's call date remains tax exempt, it is expected that the
     elimination of the tax exemption on advance refunding bonds could reduce
     municipal supply by as much as 15 to 20 percent going forward. In December
     2017, after the terms of the tax bill were announced, a host of municipal
     entities rushed to issue advance refunding bonds before the legislation
     took effect. That drove municipal issuance for December to a
     record-breaking $62.5 billion, and total 2017 issuance to $425 billion,
     much higher than projected at the start of 2017. Another provision within
     the tax bill was the decrease in the state and local property tax
     deduction for

                 Pioneer Municipal High Income Trust | Annual Report | 4/30/18 5


     individuals, now limited to a $10,000 maximum. The change promised to make
     municipal bonds more attractive given that investors would likely seek
     other ways to reduce their overall tax burdens.

     Over the final few months of the period, municipal issuance was light, as
     many municipalities had already issued their bonds before January 1, when
     the law regarding advance refundings was changed. In turn, demand for
     municipal bonds began to creep up in February 2018, as investors,
     especially those from higher-tax states such as California, New York,
     Massachusetts, and New Jersey, purchased tax-exempt securities at
     increased levels.

     High-yield municipal bonds outperformed investment-grade municipals during
     the period, by a fairly significant margin.

Q    What factors had the biggest effects on the Trust's performance
     relative to its benchmarks during the 12-month period ended April 30, 2018?

A    We maintained a well-diversified** portfolio during the period, with
     exposures to both investment-grade and high-yield municipal bonds. The
     diversification helped the Trust outperform the Bloomberg Barclays
     Municipal Bond Index, which tracks investment-grade municipals, even as
     its return trailed that of the Bloomberg Barclays U.S. Municipal High
     Yield Bond Index, as the high-yield municipal asset class outperformed.

     With regard to specific securities, the portfolio's holdings of certain
     tobacco bonds funded by Master Settlement Agreements between the tobacco
     industry and individual states, as well as the general obligation debt of
     the Commonwealth of Puerto Rico, contributed positively to the Trust's
     performance during the period.

     Conversely, holdings in the Trust's portfolio that underperformed during
     the period included bonds issued by Sanger (Texas) Industrial Development
     Corporation, which has experienced ongoing credit problems that have
     contributed to a moderate decrease in value, and municipal bonds issued by
     the City of Philippi, West Virginia.

     The City of Philippi (education) bonds funded several projects at a small
     college in rural West Virginia that have not been additive to the school's
     bottom line. However, the Trust is currently receiving payments from the
     issuer under the terms of a forbearance agreement we negotiated, and is
     expected to receive a total of $1.4 million by the time the agreement
     expires in October 2018. Prior to the forbearance agreement, the Trust was
     realizing no income from the City of Philippi bond. Meanwhile, the

**   Diversification does not assure a profit nor protect against loss.

6 Pioneer Municipal High Income Trust | Annual Report | 4/30/18


     administrative staff of the school has changed, and we are optimistic
     about the bond's forward-looking prospects based on the new
     administrators' efforts in continuing to work through the school's
     problems.

Q    Did the Trust's distributions*** to shareholders change during the
     12-month period ended April 30, 2018?

A    No, the Trust's distributions remained the same over the 12-month period.

Q    Did the level of leverage in the Trust change during the 12-month period
     ended April 30, 2018?

A    At the end of the 12-month period on April 30, 2018, 30.5% of the
     Trust's total managed assets were financed by leverage obtained through
     the issuance of preferred shares, compared with 25.9% of the Trust's total
     managed assets financed by leverage at the start of the period on May 1,
     2017.

     The Trust historically employed leverage through the issuance of Auction
     Preferred Shares ("APS"). The Trust redeemed all of its outstanding APS on
     February 14, 2018 and February 15, 2018. The Trust refinanced the APS, and
     increased the amount of leverage employed by the Trust, through the
     issuance of Variable Rate Muni Fund Term Preferred Shares ("VMTP Shares").
     VMTP Shares are issued via private placement and are not publicly
     available. The increase in leverage as a percentage of the Trust's total
     managed assets during the 12-month period was due to the increase in the
     par value of the VMTP Shares compared to that of the APS.

Q    Did the Trust invest in any derivative securities during the 12-month
     period ended April 30, 2018?

A    No, the Trust's portfolio held no derivative securities during the
     period.

Q    What is your investment outlook?

A    We maintain an optimistic view of the municipal bond market, as its
     underlying fundamentals remain strong and investor demand is steady. In
     addition, we believe we are entering what looks to be a strong period for
     municipals from May through July of this year. Those three months
     typically feature the largest volume of municipal bond coupon interest
     payments and maturities, which investors will most likely seek to reinvest
     in tax-free securities. That could translate into a significant increase
     in demand. Meanwhile, as mentioned, following the surge in supply in
     December 2017, municipal supply in 2018 has been limited. Additionally, we
     believe that healthy demand from both traditional and non-traditional
     investors drawn to the municipal market by the attractive value and

***  Distributions are not guaranteed.

                 Pioneer Municipal High Income Trust | Annual Report | 4/30/18 7


     generous yields of municipal bonds - as compared with yields available on
     taxable debt instruments - can continue to outstrip the limited new-issue
     supply and help to support the prices of municipal bonds.

     At the same time, we think that the U.S. economy should continue to grow
     at a stable and steady pace, without an accompanying acceleration in
     inflation. Also, we believe that the Fed will continue to act deliberately
     and cautiously as it gradually raises short-term rates.

     In managing the Trust going forward, we will continue to monitor events
     carefully and remain focused on intensive, fundamental research, while
     seeking to maintain a well-diversified portfolio with exposures to both
     investment-grade and high-yield municipal securities.

Please refer to the Schedule of Investments on pages 13-22 for a full listing of
Trust securities.

All investments are subject to risk, including the possible loss of principal.
In the past several years, financial markets have experienced increased
volatility, depressed valuations, decreased liquidity and heightened
uncertainty. These conditions may continue, recur, worsen or spread.

Investments in high-yield or lower-rated securities are subject to greater-than-
average risk.

The Trust may invest in securities of issuers that are in default or that are in
bankruptcy.

A portion of income may be subject to state, federal, and/or alternative minimum
tax. Capital gains, if any, are subject to a capital gains tax.

When interest rates rise, the prices of debt securities held by the Trust will
generally fall.  Conversely, when interest rates fall the prices of debt
securities held by the Trust generally will rise.

Interest rates in the U.S. recently have been historically low, so the Trust
faces a heightened risk that interest rates may rise. A general rise in interest
rates could adversely affect the price and liquidity of fixed income securities.

8 Pioneer Municipal High Income Trust | Annual Report | 4/30/18


By concentrating in municipal securities, the Trust is more susceptible to
adverse economic, political or regulatory developments than is a portfolio that
invests more broadly.

Investments in the Trust are subject to possible loss due to the financial
failure of the issuers of the underlying securities and the issuers' inability
to meet their debt obligations.

The Trust may invest up to 20% of its total assets in illiquid securities.
Illiquid securities may be difficult to dispose of at a price reflective of
their value at the times when the Trust believes it is desirable to do so, and
the market price of illiquid securities is generally more volatile than that of
more liquid securities.  Illiquid securities are also more difficult to value
and investment of the Trust's assets in illiquid securities may restrict the
Trust's ability to take advantage of market opportunities.

The Trust uses leverage through the issuance of preferred shares. Leverage
creates significant risks, including the risk that the Trust's incremental
income or capital appreciation for investments purchased with the proceeds of
leverage will not be sufficient to cover the cost of the leverage, which may
adversely affect the return for the holders of common shares.

The Trust is required to maintain certain regulatory, rating agency and other
asset coverage requirements in connection with its outstanding preferred shares.
In order to maintain required asset coverage levels, the Trust may be required
to alter the composition of its investment portfolio or take other actions, such
as redeeming preferred shares with the proceeds from portfolio transactions, at
what might be inopportune times in the market. Such actions could reduce the net
earnings or returns to holders of the Trust's common shares over time, which is
likely to result in a decrease in the market value of the Trust's shares.

These risks may increase share price volatility.

Any information in this shareholder report regarding market or economic trends
or the factors influencing the Fund's historical or future performance are
statements of opinion as of the date of this report. Past performance is no
guarantee of future results.

                 Pioneer Municipal High Income Trust | Annual Report | 4/30/18 9


Portfolio Summary | 4/30/18

Portfolio Diversification
--------------------------------------------------------------------------------
(As a percentage of total investments)*

[THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL]



                                                                        
Other Revenue                                                              33.3%
Insured                                                                    15.8%
Health Revenue                                                             12.8%
Education Revenue                                                          10.3%
Facilities Revenue                                                          8.6%
Tobacco Revenue                                                             6.7%
Development Revenue                                                         6.6%
Water Revenue                                                               2.2%
Airport Revenue                                                             1.8%
Pollution Control Revenue                                                   1.2%
Transportation Revenue                                                      0.7%


10 Largest Holdings
--------------------------------------------------------------------------------
(As a percentage of total investments)*



                                                                                         
 1. Metropolitan Pier & Exposition Authority, McCormick Place, 5.65%, 6/15/22
    (NATL-RE Insured)                                                                       4.24%
-------------------------------------------------------------------------------------------------
 2. State of Washington, Motor Vehicle Sales Tax, Series C, 6/1/22 (NATL Insured)           3.23
-------------------------------------------------------------------------------------------------
 3. Massachusetts Development Finance Agency, WGBH Foundation, Series A,
    5.75%, 1/1/42 (AMBAC Insured)                                                           2.31
-------------------------------------------------------------------------------------------------
 4. New York State Dormitory Authority, Series C, 5.0%, 3/15/39                             2.08
-------------------------------------------------------------------------------------------------
 5. Lehman Municipal Trust Receipts, RIB, 9.988%, 11/1/39 (144A) (AGM Insured)              1.96
-------------------------------------------------------------------------------------------------
 6. Harris County Health Facilities Development Corp., The Methodist Hospital System,
    Series A-1, 1.62%, 12/1/41                                                              1.68
-------------------------------------------------------------------------------------------------
 7. State of Minnesota, Series B, 4.0%, 8/1/27                                              1.65
-------------------------------------------------------------------------------------------------
 8. Massachusetts Development Finance Agency, Harvard University, Series A, 5.0%, 7/15/40   1.58
-------------------------------------------------------------------------------------------------
 9. District of Columbia Tobacco Settlement Financing Corp., Asset-Backed, 6.75%, 5/15/40   1.57
-------------------------------------------------------------------------------------------------
10. Michigan Tobacco Settlement Finance Authority, Series A, 6.0%, 6/1/48                   1.52
-------------------------------------------------------------------------------------------------


*    Excludes temporary cash investments and all derivative contracts except
     for options purchased. The portfolio is actively managed, and current
     holdings may be different. The holdings listed should not be considered
     recommendations to buy or sell any security listed.

10 Pioneer Municipal High Income Trust | Annual Report | 4/30/18


Prices and Distributions | 4/30/18

Market Value per Common Share^
--------------------------------------------------------------------------------



--------------------------------------------------------------------------------
                                4/30/18                         4/30/17
--------------------------------------------------------------------------------
                                                          
Market Value                    $ 11.25                         $ 11.75
--------------------------------------------------------------------------------
Premium/(Discount)              (10.0)%                         (7.6)%
--------------------------------------------------------------------------------


Net Asset Value per Common Share^
--------------------------------------------------------------------------------



--------------------------------------------------------------------------------
                                4/30/18                         4/30/17
--------------------------------------------------------------------------------
                                                          
Net Asset Value                 $ 12.50                         $12.72
--------------------------------------------------------------------------------


Distributions per Common Share:
--------------------------------------------------------------------------------



--------------------------------------------------------------------------------
                     Net Investment         Short-Term           Long-Term
                         Income            Capital Gains       Capital Gains
--------------------------------------------------------------------------------
                                                          
5/1/17 - 4/30/18         $ 0.6150             $ --                 $ --
--------------------------------------------------------------------------------


Yields
--------------------------------------------------------------------------------



--------------------------------------------------------------------------------
                                 4/30/18                       4/30/17
--------------------------------------------------------------------------------
                                                         
30-Day SEC Yield                 3.43%                         3.35%
--------------------------------------------------------------------------------


The data shown above represents past performance, which is no guarantee of
future results.

^    Net asset value and market value are published in Barron's on Saturday,
     The Wall Street Journal on Monday and The New York Times on Monday and
     Saturday. Net asset value and market value are published daily on the
     Trust's website at www.amundipioneer.com.

                Pioneer Municipal High Income Trust | Annual Report | 4/30/18 11


Performance Update | 4/30/18

Investment Returns
--------------------------------------------------------------------------------
The mountain chart on the right shows the change in market value, including
reinvestment of dividends and distributions, of a $10,000 investment made in
common shares of Pioneer Municipal High Income Trust during the periods
shown, compared to that of the Bloomberg Barclays Municipal Bond Index
and Bloomberg Barclays U.S. Municipal High Yield Bond Index.



Average Annual Total Returns
(As of April 30, 2018)
--------------------------------------------------------------------------------
                                               BBG
                                  BBG          Barclays
                                  Barclays     U.S.
             Net                  Municipal    Municipal
             Asset                Bond         High Yield
             Value      Market    Index        Index
Period       (NAV)      Price     (NAV)        (NAV)
--------------------------------------------------------------------------------
                                   
10 years     6.25%       5.28%    4.25%        5.61%
5 years      3.40       -0.45     2.44         3.97
1 year       3.53        0.87     1.56         5.79
--------------------------------------------------------------------------------


[THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL]

Value of $10,000 Investment



           Pioneer Municipal    Bloomberg Barclays     Bloomberg Barclays U.S. Municipal
           High Income Trust    Municipal Bond Index   High Yield  Bond Index
                                              
4/08       $10,000              $10,000                $10,000
4/09       $ 8,115              $10,311                $ 8,229
4/10       $12,066              $11,224                $10,496
4/11       $12,192              $11,471                $10,847
4/12       $15,356              $12,775                $12,599
4/13       $17,118              $13,437                $14,214
4/14       $17,306              $13,504                $13,981
4/15       $18,490              $14,152                $14,962
4/16       $18,814              $14,901                $15,637
4/17       $16,588              $14,923                $16,322
4/18       $16,733              $15,155                $17,267


Call 1-800-225-6292 or visit www.amundipioneer.com for the most recent month-end
performance results. Current performance may be lower or higher than the
performance data quoted.

Performance data shown represents past performance. Past performance is no
guarantee of future results. Investment return and market price will fluctuate,
and your shares may trade below NAV due to such factors as interest rate changes
and the perceived credit quality of borrowers.

Total investment return does not reflect broker sales charges or commissions.
All performance is for common shares of the Trust.

Shares of closed-end funds, unlike open-end funds, are not continuously offered.
There is a one-time public offering and, once issued, shares of closed-end funds
are bought and sold in the open market through a stock exchange and frequently
trade at prices lower than their NAV. NAV per common share is total assets less
total liabilities, which include preferred shares or borrowings, as applicable,
divided by the number of common shares outstanding.

When NAV is lower than market price, dividends are assumed to be reinvested at
the greater of NAV or 95% of the market price. When NAV is higher, dividends are
assumed to be reinvested at prices obtained through open-market purchases under
the Trust's dividend reinvestment plan.

The performance table and graph do not reflect the deduction of fees and taxes
that a shareowner would pay on Trust distributions or the sale of Trust shares.
Had these fees and taxes been reflected, performance would have been lower.

The Bloomberg Barclays Municipal Bond Index is an unmanaged, broad measure of
the municipal bond market. The Bloomberg Barclays High Yield Municipal Bond
Index is unmanaged, totals over $26 billion in market value and maintains over
1,300 securities. Municipal bonds in this index have the following requirements:
maturities of one year or greater, sub investment grade (below Baa or
non-rated), fixed coupon rate, issued after 12/31/90, deal size over $20
million, and maturity size of at least $3 million. Index returns are calculated
monthly, assume reinvestment of dividends and, unlike Trust returns, do not
reflect any fees, expenses or sales charges. The indices do not use leverage. It
is not possible to invest directly in the indices.

12 Pioneer Municipal High Income Trust | Annual Report | 4/30/18


Schedule of Investments | 4/30/18



-----------------------------------------------------------------------------------------------------------
Principal
Amount
USD ($)                                                                                     Value
-----------------------------------------------------------------------------------------------------------
                                                                                      
                            UNAFFILIATED ISSUERS -- 141.5% of Net Assets
                            CORPORATE BONDS -- 0.9% of Net Assets
                            DIVERSIFIED FINANCIALS -- 0.9%
                            Specialized Finance -- 0.9%
       2,522,000^           Texas Pellets, Inc. / German Pellets Texas LLC, 8.0%,
                            9/30/18 (144A)                                                  $     2,522,000
                                                                                            ---------------
                            Total Diversified Financials                                    $     2,522,000
-----------------------------------------------------------------------------------------------------------
                            TOTAL CORPORATE BONDS
                            (Cost $2,522,000)                                               $     2,522,000
-----------------------------------------------------------------------------------------------------------
                            TAX EXEMPT OBLIGATIONS --
                            140.6% of Net Assets (a)
                            Alabama -- 1.2%
       4,500,000            Huntsville-Redstone Village Special Care Facilities Financing
                            Authority, Redstone Village Project, 5.5%, 1/1/43               $     3,486,420
-----------------------------------------------------------------------------------------------------------
                            Arizona -- 2.8%
       1,000,000            Arizona Industrial Development Authority, Bridgewater
                            Avondale Project, 5.375%, 1/1/38                                $       974,460
       4,000,000(b)         City of Phoenix, 5.0%, 7/1/27                                         4,727,720
       2,250,000            City of Phoenix, Industrial Development Authority, 3rd &
                            Indian School Assisted Living Project, 5.4%, 10/1/36                  2,297,160
          24,000            County of Pima, Industrial Development Authority, Arizona
                            Charter Schools Project, Series C, 6.75%, 7/1/31                         24,042
                                                                                            ---------------
                                                                                            $     8,023,382
-----------------------------------------------------------------------------------------------------------
                            California -- 9.9%
      10,000,000(c)         California County Tobacco Securitization Agency, Capital
                            Appreciation, Stanislaus County, Subordinated,
                            Series A, 6/1/46                                                $     1,800,400
       1,450,000            California Enterprise Development Authority, Sunpower
                            Corp., 8.5%, 4/1/31                                                   1,552,660
         530,000            California Municipal Finance Authority, Santa Rosa
                            Academy Project, Series A, 5.75%, 7/1/30                                564,222
       4,750,000            California Pollution Control Financing Authority, 5.0%,
                            7/1/37 (144A)                                                         4,783,155
       1,740,000(d)         California School Finance Authority, Classical Academies
                            Project, Series A, 7.375%, 10/1/43                                    2,045,039
       1,400,000            California Statewide Communities Development Authority,
                            Lancer Plaza Project, 5.625%, 11/1/33                                 1,554,994
         568,006(e)         California Statewide Communities Development Authority,
                            Microgy Holdings Project, 9.0%, 12/1/38                                       6
       7,885,000(f)         Lehman Municipal Trust Receipts, RIB, 9.988%, 11/1/39
                            (144A) (AGM Insured)                                                  7,882,871
       2,000,000(b)         Los Angeles Community College District, Series G,
                            4.0%, 8/1/39                                                          2,091,020
       1,605,000            Los Angeles County Metropolitan Transportation Authority,
                            Series A, 5.0%, 7/1/30                                                1,912,903


The accompanying notes are an integral part of these financial statements.

                Pioneer Municipal High Income Trust | Annual Report | 4/30/18 13


Schedule of Investments | 4/30/18 (continued)



-----------------------------------------------------------------------------------------------------------
Principal
Amount
USD ($)                                                                                     Value
-----------------------------------------------------------------------------------------------------------
                                                                                      
                            California -- (continued)
       1,000,000            River Islands Public Financing Authority, Community
                            Facilities, 5.5%, 9/1/45                                        $     1,064,350
       3,000,000            Tobacco Securitization Authority of Southern California,
                            Series A-1, 5.0%, 6/1/37                                              3,008,640
                                                                                            ---------------
                                                                                            $    28,260,260
-----------------------------------------------------------------------------------------------------------
                            Colorado -- 0.7%
       1,500,000(d)         Colorado Educational & Cultural Facilities Authority, Rocky
                            Mountain Classical Academy Project, 8.0%, 9/1/43                $     1,912,695
-----------------------------------------------------------------------------------------------------------
                            Connecticut -- 5.1%
       5,150,000(f)         Connecticut State Health & Educational Facility Authority,
                            Yale University, Series V-2, 1.52%, 7/1/36                      $     5,150,000
       2,915,000            Mohegan Tribal Finance Authority, 7.0%, 2/1/45 (144A)                 3,069,087
       5,000,000(b)         State of Connecticut, Series E, 4.0%, 9/1/30                          5,132,100
       1,000,000            Town of Hamden, Whitney Center Project, Series A,
                            7.75%, 1/1/43                                                         1,046,210
                                                                                            ---------------
                                                                                            $    14,397,397
-----------------------------------------------------------------------------------------------------------
                            District of Columbia -- 6.7%
       4,365,000            District of Columbia Tobacco Settlement Financing Corp.,
                            Asset-Backed, 6.5%, 5/15/33                                     $     4,903,073
       6,000,000            District of Columbia Tobacco Settlement Financing Corp.,
                            Asset-Backed, 6.75%, 5/15/40                                          6,310,620
      25,000,000(c)         District of Columbia Tobacco Settlement Financing Corp.,
                            Capital Appreciation, Asset-Backed, Series A, 6/15/46                 3,865,750
       3,975,000            District of Columbia, Deed Tax Housing Product Trust Fund,
                            Series A, 4.25%, 6/1/37 (NATL Insured)                                3,981,241
                                                                                            ---------------
                                                                                            $    19,060,684
-----------------------------------------------------------------------------------------------------------
                            Florida -- 6.1%
       1,500,000            Alachua County Health Facilities Authority, Terraces Bonita
                            Springs Project, Series A, 8.125%, 11/15/41                     $     1,679,010
       1,500,000            Alachua County Health Facilities Authority, Terraces Bonita
                            Springs Project, Series A, 8.125%, 11/15/46                           1,673,820
       2,500,000(d)         County of Miami-Dade, Aviation Revenue, Series B,
                            5.5%, 10/1/41                                                         2,623,125
       5,000,000            County of Miami-Dade, Water & Sewer System Revenue,
                            Series A, 4.0%, 10/1/44                                               5,094,250
       5,000,000            Florida's Turnpike Enterprise, Department of Transportation,
                            Series A, 4.0%, 7/1/34                                                5,179,450
       1,000,000(d)         Hillsborough County Industrial Development Authority,
                            Various Health Facilities, 8.0%, 8/15/32                              1,084,700
                                                                                            ---------------
                                                                                            $    17,334,355
-----------------------------------------------------------------------------------------------------------
                            Georgia -- 2.5%
       2,500,000            Clayton County Development Authority, Delta Air Lines,
                            Series A, 8.75%, 6/1/29                                         $     2,803,375


The accompanying notes are an integral part of these financial statements.

14 Pioneer Municipal High Income Trust | Annual Report | 4/30/18




-----------------------------------------------------------------------------------------------------------
Principal
Amount
USD ($)                                                                                     Value
-----------------------------------------------------------------------------------------------------------
                                                                                      
                            Georgia -- (continued)
       4,000,000            Private Colleges & Universities Authority, Emory University,
                            Series A, 5.0%, 10/1/43                                         $     4,401,120
                                                                                            ---------------
                                                                                            $     7,204,495
-----------------------------------------------------------------------------------------------------------
                            Idaho -- 1.8%
       5,000,000            Power County Industrial Development Corp., FMC Corp.
                            Project, 6.45%, 8/1/32                                          $     5,020,100
-----------------------------------------------------------------------------------------------------------
                            Illinois -- 16.6%
       2,087,000(f)         Illinois Finance Authority, Clare Oaks Project, Series B,
                            4.0%, 11/15/52                                                  $     1,730,666
       1,305,000(c)         Illinois Finance Authority, Clare Oaks Project, Series C-1,
                            11/15/52                                                                 43,757
         261,000(c)         Illinois Finance Authority, Clare Oaks Project, Series C-2,
                            11/15/52                                                                 74,562
         261,000(c)         Illinois Finance Authority, Clare Oaks Project, Series C-3,
                            11/15/52                                                                 44,871
       2,000,000(d)         Illinois Finance Authority, Northwestern Memorial Hospital,
                            Series A, 6.0%, 8/15/39                                               2,105,460
       2,500,000            Illinois Finance Authority, Roosevelt University Project,
                            6.5%, 4/1/39                                                          2,613,000
       3,865,000(d)         Illinois Finance Authority, Swedish Covenant, Series A,
                            6.0%, 8/15/38                                                         4,134,777
       3,500,000            Illinois Finance Authority, The Admiral at the Lake Project,
                            5.25%, 5/15/42                                                        3,462,235
       4,000,000            Illinois Finance Authority, The Admiral at the Lake Project,
                            5.5%, 5/15/54                                                         4,019,680
       1,700,000(d)         Illinois Finance Authority, The Admiral at the Lake Project,
                            Series A, 7.625%, 5/15/25                                             1,886,949
         600,000(d)         Illinois Finance Authority, The Admiral at the Lake Project,
                            Series A, 7.75%, 5/15/30                                                667,470
       2,000,000(d)         Illinois Finance Authority, The Admiral at the Lake Project,
                            Series A, 8.0%, 5/15/40                                               2,233,540
       3,200,000(d)         Illinois Finance Authority, The Admiral at the Lake Project,
                            Series A, 8.0%, 5/15/46                                               3,573,664
       1,610,000(g)         Metropolitan Pier & Exposition Authority, McCormick Place,
                            5.65%, 6/15/22 (NATL-RE Insured)                                      1,825,531
      13,785,000            Metropolitan Pier & Exposition Authority, McCormick Place,
                            5.65%, 6/15/22 (NATL-RE Insured)                                     15,235,182
       1,000,000            Metropolitan Pier & Exposition Authority, McCormick Place,
                            Series B, 5.0%, 6/15/52 (ST APPROP Insured)                           1,021,580
       1,485,000(g)         Metropolitan Pier & Exposition Authority, McCormick Place,
                            Series B, 5.65%, 6/15/22 (NATL Insured)                               1,680,663
         915,000            Southwestern Illinois Development Authority, Village of
                            Sauget Project, 5.625%, 11/1/26                                         867,347
                                                                                            ---------------
                                                                                            $    47,220,934
-----------------------------------------------------------------------------------------------------------


The accompanying notes are an integral part of these financial statements.

                Pioneer Municipal High Income Trust | Annual Report | 4/30/18 15


Schedule of Investments | 4/30/18 (continued)



-----------------------------------------------------------------------------------------------------------
Principal
Amount
USD ($)                                                                                     Value
-----------------------------------------------------------------------------------------------------------
                                                                                      
                            Indiana -- 1.8%
         250,000            City of Carmel, Barrington Carmel Project, Series A,
                            7.0%, 11/15/32                                                  $       268,910
         750,000            City of Carmel, Barrington Carmel Project, Series A,
                            7.125%, 11/15/42                                                        803,902
         500,000            City of Carmel, Barrington Carmel Project, Series A,
                            7.125%, 11/15/47                                                        534,900
       1,000,000            City of Evansville, Silver Birch Evansville Project,
                            5.45%, 1/1/38                                                           983,340
       1,500,000            City of Mishawaka, Silver Birch Mishawaka Project,
                            5.375%, 1/1/38 (144A)                                                 1,461,690
       1,000,000            Indiana Finance Authority, Multipurpose Educational
                            Facilities, Avondale Meadows Academy Project,
                            5.375%, 7/1/47                                                          949,890
                                                                                            ---------------
                                                                                            $     5,002,632
-----------------------------------------------------------------------------------------------------------
                            Kentucky -- 1.9%
       5,000,000(d)         Kentucky Economic Development Finance Authority,
                            Owensboro Medical Health System, Series A,
                            6.375%, 6/1/40                                                  $     5,434,950
-----------------------------------------------------------------------------------------------------------
                            Louisiana -- 0.8%
       2,260,000            Jefferson Parish Hospital Service District No. 2, East
                            Jefferson General Hospital, 6.375%, 7/1/41                      $     2,302,714
-----------------------------------------------------------------------------------------------------------
                            Maine -- 2.3%
       1,500,000            Maine Health & Higher Educational Facilities Authority,
                            Maine General Medical Center, 7.5%, 7/1/32                      $     1,673,355
       4,480,000            Maine Turnpike Authority, Series A, 5.0%, 7/1/42                      4,850,003
                                                                                            ---------------
                                                                                            $     6,523,358
-----------------------------------------------------------------------------------------------------------
                            Maryland -- 0.5%
       1,435,000            Maryland Health & Higher Educational Facilities Authority,
                            City Neighbors, Series A, 6.75%, 7/1/44                         $     1,554,019
-----------------------------------------------------------------------------------------------------------
                            Massachusetts -- 10.3%
       7,000,000(c)         Massachusetts Bay Transportation Authority, Series A,
                            7/1/28                                                          $     5,141,010
       1,550,000            Massachusetts Development Finance Agency, Harvard
                            University, Series A, 5.0%, 7/15/36                                   1,937,500
       5,000,000            Massachusetts Development Finance Agency, Harvard
                            University, Series A, 5.0%, 7/15/40                                   6,366,850
         961,700            Massachusetts Development Finance Agency, Linden
                            Ponds, Inc., Series A-1, 5.5%, 11/15/46                                 966,691
       1,000,000            Massachusetts Development Finance Agency, Partners
                            Healthcare System, 4.0%, 7/1/41                                       1,020,930
       7,100,000            Massachusetts Development Finance Agency, WGBH
                            Foundation, Series A, 5.75%, 1/1/42 (AMBAC Insured)                   9,319,460
         380,000            Massachusetts Educational Financing Authority, Series I,
                            6.0%, 1/1/28                                                            395,421


The accompanying notes are an integral part of these financial statements.

16 Pioneer Municipal High Income Trust | Annual Report | 4/30/18




-----------------------------------------------------------------------------------------------------------
Principal
Amount
USD ($)                                                                                     Value
-----------------------------------------------------------------------------------------------------------
                                                                                      
                            Massachusetts -- (continued)
       3,100,000            Massachusetts Health & Educational Facilities Authority,
                            Massachusetts Institute of Technology, Series K,
                            5.5%, 7/1/32                                                    $     4,043,268
                                                                                            ---------------
                                                                                            $    29,191,130
-----------------------------------------------------------------------------------------------------------
                            Michigan -- 3.2%
       2,640,000            Michigan State University, Series A, 5.0%, 8/15/41              $     2,911,154
       6,100,000            Michigan Tobacco Settlement Finance Authority, Series A,
                            6.0%, 6/1/48                                                          6,136,356
                                                                                            ---------------
                                                                                            $     9,047,510
-----------------------------------------------------------------------------------------------------------
                            Minnesota -- 4.5%
       2,000,000            Bloomington Port Authority, Radisson Blu Mall of America,
                            9.0%, 12/1/35                                                   $     2,241,180
       1,000,000            City of Ham Lake, DaVinci Academy, Series A, 5.0%, 7/1/47               999,930
       2,300,000            City of Rochester, Mayo Clinic, Series B, 5.0%, 11/15/35              2,820,881
       6,000,000(b)         State of Minnesota, Series B, 4.0%, 8/1/27                            6,652,620
                                                                                            ---------------
                                                                                            $    12,714,611
-----------------------------------------------------------------------------------------------------------
                            Mississippi -- 1.8%
       3,000,000(f)         Mississippi Business Finance Corp., Chevron USA, Inc.,
                            Series I, 1.55%, 11/1/35                                        $     3,000,000
       1,000,000(f)         Mississippi Business Finance Corp., Chevron USA, Inc.,
                            Project, Series B, 1.6%, 12/1/30                                      1,000,000
       1,000,000(f)         Mississippi Business Finance Corp., Chevron USA, Inc.,
                            Project, Series E, 1.6%, 12/1/30                                      1,000,000
                                                                                            ---------------
                                                                                            $     5,000,000
-----------------------------------------------------------------------------------------------------------
                            Montana -- 0.0%+
       1,600,000(e)         Two Rivers Authority, Inc., 7.375%, 11/1/27                     $        67,200
-----------------------------------------------------------------------------------------------------------
                            New Hampshire -- 0.3%
       1,000,000            New Hampshire Health & Education Facilities Authority Act,
                            Catholic Medical Centre, 3.75%, 7/1/40                          $       929,990
-----------------------------------------------------------------------------------------------------------
                            New Jersey -- 2.1%
       3,000,000            New Jersey Economic Development Authority, Continental
                            Airlines, 5.25%, 9/15/29                                        $     3,254,880
       2,500,000            New Jersey Economic Development Authority, Continental
                            Airlines, 5.75%, 9/15/27                                              2,755,775
                                                                                            ---------------
                                                                                            $     6,010,655
-----------------------------------------------------------------------------------------------------------
                            New Mexico -- 1.5%
       1,500,000            County of Otero, Otero County Jail Project, 9.0%, 4/1/23        $     1,442,640
       2,960,000(f)         County of Otero, Otero County Jail Project, 9.0%, 4/1/28              2,703,753
                                                                                            ---------------
                                                                                            $     4,146,393
-----------------------------------------------------------------------------------------------------------


The accompanying notes are an integral part of these financial statements.

                Pioneer Municipal High Income Trust | Annual Report | 4/30/18 17


Schedule of Investments | 4/30/18 (continued)



-----------------------------------------------------------------------------------------------------------
Principal
Amount
USD ($)                                                                                     Value
-----------------------------------------------------------------------------------------------------------
                                                                                      
                            New York -- 5.6%
       2,000,000(d)         Hempstead Local Development Corp., Molloy College
                            Project, 5.75%, 7/1/39                                          $     2,089,100
       1,000,000(d)         New York State Dormitory Authority, Orange Medical
                            Center, 6.125%, 12/1/29                                               1,024,970
       7,500,000            New York State Dormitory Authority, Series C, 5.0%, 3/15/39           8,374,200
       1,500,000            New York State Dormitory Authority, Trustees of Columbia
                            University, 5.0%, 10/1/45                                             1,919,415
       2,455,540            Westchester County Healthcare Corp., Series A,
                            5.0%, 11/1/44                                                         2,604,689
                                                                                            ---------------
                                                                                            $    16,012,374
-----------------------------------------------------------------------------------------------------------
                            North Dakota -- 1.0%
       2,525,000(d)         County of Burleigh, St. Alexius Medical Center,
                            5.0%, 7/1/38                                                    $     2,789,923
-----------------------------------------------------------------------------------------------------------
                            Ohio -- 5.4%
       1,325,000            Buckeye Tobacco Settlement Financing Authority,
                            Asset-Backed, Series A-2, 5.75%, 6/1/34                         $     1,313,141
       2,500,000            Buckeye Tobacco Settlement Financing Authority,
                            Asset-Backed, Series A-2, 5.875%, 6/1/47                              2,499,975
       1,700,000            Buckeye Tobacco Settlement Financing Authority,
                            Asset-Backed, Series A-2, 6.0%, 6/1/42                                1,695,818
       6,000,000            Buckeye Tobacco Settlement Financing Authority,
                            Asset-Backed, Series A-2, 6.5%, 6/1/47                                6,083,940
       1,000,000            Ohio Housing Finance Agency, Sanctuary Springboro
                            Project, 5.45%, 1/1/38 (144A)                                           983,340
       2,500,000(b)(d)      State of Ohio, Common Schools, Series B, 5.0%, 6/15/29                2,776,275
                                                                                            ---------------
                                                                                            $    15,352,489
-----------------------------------------------------------------------------------------------------------
                            Oregon -- 2.4%
       1,000,000            Oregon Health & Science University, Series A, 5.0%, 7/1/42      $     1,130,070
       5,190,000            Oregon Health & Science University, Series E, 5.0%, 7/1/32            5,712,841
                                                                                            ---------------
                                                                                            $     6,842,911
-----------------------------------------------------------------------------------------------------------
                            Pennsylvania -- 6.1%
       3,000,000            Geisinger Authority, Geisinger Health System, series A-1,
                            5.0%, 2/15/45                                                   $     3,330,510
       3,000,000(f)         Geisinger Authority, Geisinger Health System, Series B,
                            1.59%, 8/1/22                                                         3,000,000
       1,280,000(e)         Langhorne Manor Borough Higher Education Authority,
                            Lower Bucks Hospital, 7.35%, 7/1/22                                     236,800
       5,000,000            Pennsylvania Economic Development Financing Authority,
                            USG Corp. Project, 6.0%, 6/1/31                                       5,009,700
         500,000            Philadelphia Authority for Industrial Development, Greater
                            Philadelphia Health Action, Inc., Project, Series A,
                            6.625%, 6/1/50                                                          518,365
       2,000,000            Philadelphia Authority for Industrial Development, Nueva
                            Esperanze, Inc., 8.2%, 12/1/43                                        2,214,060


The accompanying notes are an integral part of these financial statements.

18 Pioneer Municipal High Income Trust | Annual Report | 4/30/18




-----------------------------------------------------------------------------------------------------------
Principal
Amount
USD ($)                                                                                     Value
-----------------------------------------------------------------------------------------------------------
                                                                                      
                            Pennsylvania -- (continued)
       1,000,000            Philadelphia Authority for Industrial Development, Performing
                            Arts Charter School Project, 6.5%, 6/15/33 (144A)               $     1,050,060
       2,000,000            Philadelphia Authority for Industrial Development, Performing
                            Arts Charter School Project, 6.75%, 6/15/43 (144A)                    2,099,780
                                                                                            ---------------
                                                                                            $    17,459,275
-----------------------------------------------------------------------------------------------------------
                            Puerto Rico -- 0.9%
       6,255,000(b)(e)      Commonwealth of Puerto Rico, Series A, 8.0%, 7/1/35             $     2,642,738
-----------------------------------------------------------------------------------------------------------
                            Rhode Island -- 1.7%
       5,900,000(e)         Central Falls Detention Facility Corp., 7.25%, 7/15/35          $     1,062,000
       2,000,000            Rhode Island Health & Educational Building Corp., Brown
                            University, Series A, 4.0%, 9/1/37                                    2,098,440
       1,500,000(d)         Rhode Island Health & Educational Building Corp.,
                            Tockwatten Home Issue, 8.375%, 1/1/46                                 1,740,420
                                                                                            ---------------
                                                                                            $     4,900,860
-----------------------------------------------------------------------------------------------------------
                            Texas -- 12.4%
       1,000,000            Arlington Higher Education Finance Corp., Universal
                            Academy, Series A, 7.0%, 3/1/34                                 $     1,026,260
       2,500,000(d)         Central Texas Regional Mobility Authority, Sub Lien,
                            6.75%, 1/1/41                                                         2,787,825
       1,490,000(b)         County of Harris, Series A, 5.0%, 10/1/26                             1,738,428
       5,000,000(b)         Goose Creek Consolidated Independent School District,
                            Series C, 4.0%, 2/15/26 (PSF-GTD Insured)                             5,387,550
         725,078(e)         Gulf Coast Industrial Development Authority, Microgy
                            Holdings Project, 7.0%, 12/1/36                                               7
       6,755,000(f)         Harris County Health Facilities Development Corp., The
                            Methodist Hospital System, Series A-1, 1.62%, 12/1/41                 6,755,000
       3,790,000(f)         Harris County Health Facilities Development Corp., The
                            Methodist Hospital System, Series A-2, 1.62%, 12/1/41                 3,790,000
       3,785,000            North Texas Tollway Authority, Series A, 5.0%, 1/1/35                 4,164,560
       1,500,000(d)         Red River Health Facilities Development Corp., MRC
                            Crestview, Series A, 8.0%, 11/15/41                                   1,791,015
       3,960,000^(e)        Sanger Industrial Development Corp., Texas Pellets Project,
                            Series B, 8.0%, 7/1/38                                                1,485,000
       1,000,000(e)         Tarrant County Cultural Education Facilities Finance Corp.,
                            Mirador Project, Series A, 4.875%, 11/15/48                             691,250
       1,000,000            Tarrant County Cultural Education Facilities Finance Corp.,
                            Mirador Project, Series A, 5.0%, 11/15/55                               690,900
       2,000,000(d)         Tarrant County Cultural Education Facilities Finance Corp.,
                            MRC Crestview Project, 8.0%, 11/15/34                                 2,287,780
       2,500,000(d)         Travis County Health Facilities Development Corp.,
                            Longhorn Village Project, 7.125%, 1/1/46                              2,818,850
                                                                                            ---------------
                                                                                            $    35,414,425
-----------------------------------------------------------------------------------------------------------
                            Utah -- 0.4%
       1,000,000            Salt Lake City Corp., Airport Revenue, Series B, 5.0%, 7/1/35   $     1,140,240
-----------------------------------------------------------------------------------------------------------


The accompanying notes are an integral part of these financial statements.

                Pioneer Municipal High Income Trust | Annual Report | 4/30/18 19


Schedule of Investments | 4/30/18 (continued)



------------------------------------------------------------------------------------------------------------
Principal
Amount
USD ($)                                                                                     Value
------------------------------------------------------------------------------------------------------------
                                                                                      
                            Virginia -- 4.8%
       2,200,000(b)         County of Arlington, 4.0%, 8/15/35                              $     2,333,078
       1,415,000(b)         County of Fairfax, Series A, 4.0%, 10/1/33 (ST AID
                            WITHHLDG Insured)                                                     1,516,908
       5,000,000            University of Virginia, Series A, 5.0%, 4/1/42                        5,743,200
       4,000,000            Upper Occoquan Sewage Authority, 4.0%, 7/1/41                         4,143,600
                                                                                            ----------------
                                                                                            $    13,736,786
------------------------------------------------------------------------------------------------------------
                            Washington -- 9.8%
       3,745,000            City of Seattle, Water System Revenue, 4.0%, 8/1/32             $     3,989,549
       2,500,000(b)         King County, Issaquah School District No. 411, 4.0%,
                            12/1/31 (SCH BD GTY Insured)                                          2,661,525
      14,315,000(b)(c)      State of Washington, Motor Vehicle Sales Tax, Series C,
                            6/1/22 (NATL Insured)                                                12,997,591
       2,500,000            University of Washington, Series B, 5.0%, 6/1/29                      2,890,925
       3,795,000(d)         Washington State Health Care Facilities Authority, Fred
                            Hutchinson Cancer Research Center, Series A, 6.0%, 1/1/33             3,969,987
       1,150,000            Washington State Housing Finance Commission, Mirabella
                            Project, Series A, 6.75%, 10/1/47 (144A)                              1,248,647
                                                                                            ----------------
                                                                                            $    27,758,224
------------------------------------------------------------------------------------------------------------
                            West Virginia -- 0.4%
       2,000,000(e)         City of Philippi, Alderson-Broaddus College, Inc., Series A,
                            7.75%, 10/1/44                                                  $     1,196,000
------------------------------------------------------------------------------------------------------------
                            Wisconsin -- 5.3%
       5,000,000            Public Finance Authority, Glenridge Palmer Ranch, Series A,
                            8.25%, 6/1/46                                                   $     5,766,350
         750,000            Public Finance Authority, Roseman University Health
                            Sciences Project, 5.875%, 4/1/45                                        803,760
       1,000,000            Public Finance Authority, SearStone CCRC Project, Series A,
                            5.3%, 6/1/47                                                            972,510
       1,490,000(d)         Public Finance Authority, SearStone CCRC Project, Series A,
                            8.625%, 6/1/47 (144A)                                                 1,828,156
       5,000,000            Wisconsin Department of Transportation, Series A,
                            5.0%, 7/1/28                                                          5,688,350
                                                                                            ----------------
                                                                                            $    15,059,126
------------------------------------------------------------------------------------------------------------
                            TOTAL TAX EXEMPT OBLIGATIONS
                            (Cost $391,029,554)                                             $   400,151,255
------------------------------------------------------------------------------------------------------------
                            TOTAL INVESTMENTS IN UNAFFILIATED ISSUERS -- 141.5%
                            (Cost $393,551,554)                                             $   402,673,255
------------------------------------------------------------------------------------------------------------
                            OTHER ASSETS AND LIABILITIES -- 2.4%                            $     6,917,176
------------------------------------------------------------------------------------------------------------
                            VARIABLE RATE MUNIFUND TERM PREFERRED SHARES
                            AT REDEMPTION VALUE -- (43.9)%                                  $  (124,994,377)
------------------------------------------------------------------------------------------------------------
                            NET ASSETS APPLICABLE TO COMMON
                            SHAREOWNERS -- 100.0%                                           $   284,596,054
============================================================================================================


The accompanying notes are an integral part of these financial statements.

20 Pioneer Municipal High Income Trust | Annual Report | 4/30/18


RIB        Residual Interest Bond is purchased in a secondary market. The
           interest rate is subject to change periodically and inversely based
           upon prevailing market rates. The interest rate shown is the rate at
           April 30, 2018.

(144A)     Security is exempt from registration under Rule 144A of the
           Securities Act of 1933. Such securities may be resold normally to
           qualified institutional buyers in a transaction exempt from
           registration. At April 30, 2018, the value of these securities
           amounted to $26,928,786, or 9.5% of net assets.

+          Amount rounds to less than 0.1%.

^          Security is valued using fair value methods (other than supplied
           by independent pricing services). See notes to Financial Statements
           -- Note 1A.

(a)        Consists of Revenue Bonds unless otherwise indicated.

(b)        Represents a General Obligation Bond.

(c)        Security issued with a zero coupon. Income is recognized through
           accretion of discount.

(d)        Prerefunded bonds have been collateralized by U.S. Treasury or
           U.S. Government Agency securities which are held in escrow to pay
           interest and principal on the tax exempt issue and to retire the
           bonds in full at the earliest refunding date.

(e)        Security is in default.

(f)        The interest rate is subject to change periodically. The
           interest rate and/or reference index and spread shown at April 30,
           2018.

(g)        Escrow to maturity.

Purchases and sales of securities (excluding temporary cash investments) for the
year ended April 30, 2018 aggregated $98,385,075 and $77,447,197 respectively.

The Trust is permitted to engage in purchase and sale transactions ("cross
trades") with certain funds and accounts for which Amundi Pioneer Asset
Management, Inc. (the "Adviser") serves as the investment adviser, as set forth
in Rule 17a-7 under the Investment Company Act of 1940, pursuant to procedures
adopted by the Board of Trustees. Under these procedures, cross trades are
effected at current market prices. During the year ended April 30, 2018, the
Trust engaged in purchases and sales pursuant to these procedures amounting to
$8,766,691 and none, respectively, resulting in a gain of none.

At April 30, 2018, the net unrealized appreciation on investments based on cost
for federal tax purposes of $393,131,861 was as follows:



                                                                                    
           Aggregate gross unrealized appreciation for all investments in which
             there is an excess of value over tax cost                                 $ 29,268,058

           Aggregate gross unrealized depreciation for all investments in which
             there is an excess of tax cost over value                                  (19,726,664)
                                                                                       ------------
           Net unrealized appreciation                                                 $  9,541,394
                                                                                       ============


Various inputs are used in determining the value of the Trust's investments.
These inputs are summarized in the three broad levels below.

   Level 1 -- quoted prices in active markets for identical securities.

   Level 2 -- other significant observable inputs (including quoted
              prices for similar securities, interest rates, prepayment speeds,
              credit risks, etc.). See Notes to Financial Statements -- Note 1A.

   Level 3 -- significant unobservable inputs (including the Trust's
              own assumptions in determining fair value of investments). See
              Notes to Financial Statements -- Note 1A.

The accompanying notes are an integral part of these financial statements.

                Pioneer Municipal High Income Trust | Annual Report | 4/30/18 21


Schedule of Investments | 4/30/18 (continued)

The following is a summary of the inputs used as of April 30, 2018, in valuing
the Trust's investments.



---------------------------------------------------------------------------------------------------
                                      Level 1       Level 2           Level 3         Total
---------------------------------------------------------------------------------------------------
                                                                          
Corporate Bond & Note                 $ --          $   2,522,000     $       --      $   2,522,000
Tax Exempt Obligations
   Texas                                --             33,929,425      1,485,000         35,414,425
   All Other Tax Exempt Obligations     --            364,736,830             --        364,736,830
---------------------------------------------------------------------------------------------------
Total Investments in Securities       $ --          $ 401,188,255     $1,485,000      $ 402,673,255
===================================================================================================


The following is a reconciliation of assets valued using significant
unobservable inputs (Level 3):



----------------------------------------------------------------------------------------------------
                                                                             Tax Exempt Obligations
----------------------------------------------------------------------------------------------------
                                                                                   
Balance as of 4/30/17                                                                 $   2,376,000
Realized gain (loss)(1)                                                                          --
Change in unrealized appreciation (depreciation)(2)                                        (886,376)
Accrued discounts/premiums                                                                   (4,624)
Purchases                                                                                        --
Sales                                                                                            --
Changes between Level 3*                                                                         --
----------------------------------------------------------------------------------------------------
Balance as of 4/30/18                                                                 $   1,485,000
====================================================================================================


(1)  Realized gain (loss) on these securities is included in the net realized
     gain (loss) from investments on the Statement of Operations.

(2)  Unrealized appreciation (depreciation) on these securities is included
     in the change in unrealized appreciation (depreciation) from investments
     on the Statement of Operations.

*    Transfers are calculated on the beginning of period value. During the
     year ended April 30, 2018, there were no transfers between Levels 1, 2 and
     3.



                                                                                         
Net change in unrealized appreciation (depreciation) of Level 3 investments still held
and considered Level 3 at April 30, 2018:                                                   $   (886,376)
                                                                                            ------------


The accompanying notes are an integral part of these financial statements.

22 Pioneer Municipal High Income Trust | Annual Report | 4/30/18


Statement of Assets and Liabilities | 4/30/18



                                                                                  
ASSETS:
  Investments in unaffiliated issuers, at value (cost $393,551,554)                  $  402,673,255
  Cash                                                                                      822,909
  Receivables --
     Investment securities sold                                                              30,000
     Interest                                                                             6,099,839
  Other assets                                                                              147,937
---------------------------------------------------------------------------------------------------
        Total assets                                                                 $  409,773,940
===================================================================================================
LIABILITIES:
   Payables --
      Administration fee                                                             $       43,974
      Trustees' fees                                                                            987
      Custody fees                                                                            1,723
      Professional fees                                                                      71,042
      Transfer agent fees                                                                     3,682
      Shareowner communications expense                                                       1,014
      Printing expenses                                                                       7,977
      Pricing fees                                                                              616
   Due to affiliates
      Management fees                                                                        32,483
      Other due to affiliates                                                                 3,796
   Miscellaneous expenses                                                                    16,215
---------------------------------------------------------------------------------------------------
         Total liabilities                                                           $      183,509
===================================================================================================
Variable Rate MuniFund Term Preferred Shares, net of deferred offering costs:
   $100,000 liquidation value per share applicable to 1,250 shares                   $  124,994,377
---------------------------------------------------------------------------------------------------
NET ASSETS APPLICABLE TO COMMON SHAREOWNERS:
  Paid-in capital                                                                    $  300,996,046
  Undistributed net investment income                                                     3,521,751
  Accumulated net realized loss on investments                                          (29,043,444)
  Net unrealized appreciation on investments                                              9,121,701
---------------------------------------------------------------------------------------------------
        Net assets applicable to common shareowners                                  $  284,596,054
===================================================================================================
NET ASSET VALUE PER COMMON SHARE:
  No par value
     Based on $284,596,054 / 22,771,349 common shares                                $        12.50
===================================================================================================


The accompanying notes are an integral part of these financial statements.

                Pioneer Municipal High Income Trust | Annual Report | 4/30/18 23


Statement of Operations

For the Year Ended 4/30/18



                                                                               
INVESTMENT INCOME:
   Interest from unaffiliated issuers                                $ 20,804,256
----------------------------------------------------------------------------------------------------
      Total investment income                                                        $   20,804,256
----------------------------------------------------------------------------------------------------
EXPENSES:
  Management fees                                                    $  2,381,331
  Administrative expense                                                  142,432
  Transfer agent fees                                                      17,701
  Shareowner communications expense                                        17,646
  Auction agent fees                                                       82,115
  Custodian fees                                                            6,654
  Professional fees                                                       125,927
  Printing expense                                                         17,453
  Trustees' fees                                                           13,462
  Pricing fees                                                             22,126
  Miscellaneous                                                           120,636
----------------------------------------------------------------------------------------------------
     Total expenses                                                                  $    2,947,483
----------------------------------------------------------------------------------------------------
         Net investment income                                                       $   17,856,773
----------------------------------------------------------------------------------------------------
REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS:
   Net realized gain (loss) on:
      Investments from unaffiliated issuers                          $(12,146,048)
   Change in net unrealized appreciation on:
      Investments from unaffiliated issuers                             5,201,392
----------------------------------------------------------------------------------------------------
         Net realized and unrealized gain (loss) on investments                      $   (6,944,656)
----------------------------------------------------------------------------------------------------
DISTRIBUTIONS TO PREFERRED SHAREOWNERS FROM
NET INVESTMENT INCOME:                                                               $   (2,052,256)
----------------------------------------------------------------------------------------------------
   Net increase in net assets resulting from operations                              $    8,859,861
====================================================================================================


The accompanying notes are an integral part of these financial statements.

24 Pioneer Municipal High Income Trust | Annual Report | 4/30/18


Statements of Changes in Net Assets



--------------------------------------------------------------------------------------------------
                                                                     Year            Year
                                                                     Ended           Ended
                                                                     4/30/18         4/30/17*
---------------------------------------------------------------------------------------------------
                                                                               
FROM OPERATIONS:
Net investment income (loss)                                         $  17,856,773   $  16,563,834
Net realized gain (loss) on investments                                (12,146,048)       (654,552)
Change in net unrealized appreciation (depreciation)
   on investments                                                        5,201,392     (16,590,447)
Distributions to preferred shareowners from net
   investment income                                                    (2,052,256)     (1,150,946)
---------------------------------------------------------------------------------------------------
       Net increase (decrease) in net assets resulting
          from operations                                            $   8,859,861   $  (1,832,111)
---------------------------------------------------------------------------------------------------
DISTRIBUTIONS TO COMMON SHAREOWNERS:
Net investment income and previously undistributed net
   investment income ($0.62 and $0.69 per share, respectively)       $ (14,004,380)  $ (15,653,258)
---------------------------------------------------------------------------------------------------
         Total distributions to common shareowners                   $ (14,004,380)  $ (15,653,258)
---------------------------------------------------------------------------------------------------
FROM TRUST SHARE TRANSACTIONS:
Reinvestment of distributions                                        $          --   $     199,322
---------------------------------------------------------------------------------------------------
      Net increase in net assets applicable to common
        shareowners from Trust share transactions                    $          --   $     199,322
---------------------------------------------------------------------------------------------------
      Net decrease in net assets applicable to
        common shareowners                                           $  (5,144,519)  $ (17,286,047)
---------------------------------------------------------------------------------------------------
NET ASSETS APPLICABLE TO COMMON SHAREOWNERS:
Beginning of year                                                      289,740,573     307,026,620
---------------------------------------------------------------------------------------------------
End of year                                                          $ 284,596,054   $ 289,740,573
---------------------------------------------------------------------------------------------------
Undistributed net investment income                                  $   3,521,751   $   3,465,527
===================================================================================================


*    The Trust was audited by an independent registered public accounting firm
     other than Ernst & Young LLP.

The accompanying notes are an integral part of these financial statements.

                Pioneer Municipal High Income Trust | Annual Report | 4/30/18 25


Financial Highlights



----------------------------------------------------------------------------------------------------------------------------------
                                                                        Year      Year       Year         Year        Year
                                                                        Ended     Ended      Ended        Ended       Ended
                                                                        4/30/18   4/30/17*   4/30/16*     4/30/15*    4/30/14
----------------------------------------------------------------------------------------------------------------------------------
                                                                                                       
Per Share Operating Performance
Net asset value, beginning of period                                    $  12.72  $  13.49   $   13.31    $  13.33    $   14.72
----------------------------------------------------------------------------------------------------------------------------------
Increase (decrease) from investment operations: (a)
   Net investment income (loss)                                         $   0.78  $   0.73   $    0.83    $   0.91    $    1.05
   Net realized and unrealized gain (loss) on investments                  (0.29)    (0.76)       0.20        0.16        (1.29)
----------------------------------------------------------------------------------------------------------------------------------
Distributions to preferred shareowners from:
   Net investment income                                                $  (0.09) $  (0.05)  $   (0.01)   $  (0.01)   $   (0.01)
----------------------------------------------------------------------------------------------------------------------------------
Net increase (decrease) from investment operations                      $   0.40  $  (0.08)  $    1.02    $   1.06    $   (0.25)
----------------------------------------------------------------------------------------------------------------------------------
Distributions to common shareowners from:
   Net investment income and previously undistributed
      net investment income                                             $  (0.62) $  (0.69)  $   (0.84)** $  (1.08)** $   (1.14)**
----------------------------------------------------------------------------------------------------------------------------------
Net increase (decrease) in net asset value                              $  (0.22) $  (0.77)  $    0.18    $  (0.02)   $   (1.39)
----------------------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                                          $  12.50  $  12.72   $   13.49    $  13.31    $   13.33
----------------------------------------------------------------------------------------------------------------------------------
Market value, end of period                                             $  11.25  $  11.75   $   14.07    $  14.75    $   14.90
==================================================================================================================================
Total return at net asset value (b)                                         3.53%    (0.45)%     8.12%        7.76%       (1.57)%
Total return at market value (b)                                            0.87%   (11.83)%     1.75%        6.84%        1.10%
Ratios to average net assets of common shareowners:
   Total expenses (c)                                                       1.01%     1.00%      1.05%        1.03%        1.04%
   Net investment income before preferred share distributions               6.14%     5.54%      6.24%        6.73%        7.89%
   Preferred share distributions                                            0.71%     0.38%      0.10%        0.04%        0.05%
  Net investment income available to common shareowners                     5.44%     5.16%      6.14%        6.69%        7.84%
Portfolio turnover                                                            20%       19%         9%          14%          19%
Net assets of common shareowners, end of period (in thousands)          $284,596  $289,741   $307,027     $302,718     $301,872


The accompanying notes are an integral part of these financial statements.

26 Pioneer Municipal High Income Trust | Annual Report | 4/30/18




----------------------------------------------------------------------------------------------------------------------------------
                                                                          Year        Year        Year        Year        Year
                                                                          Ended       Ended       Ended       Ended       Ended
                                                                          4/30/18     4/30/17*    4/30/16*    4/30/15*    4/30/14
----------------------------------------------------------------------------------------------------------------------------------
                                                                                                           
Preferred shares outstanding (in thousands) (d)(e)                        $125,000    $101,000    $101,000    $101,000    $101,000
Asset coverage per preferred share, end of period                         $327,672    $ 96,723    $100,998    $ 99,930    $ 99,721
Average market value per preferred share (f)                              $100,000    $ 25,000    $ 25,000    $ 25,000    $ 25,000
Liquidation value, including dividends payable, per preferred share       $ 99,996    $ 25,006    $ 25,001    $ 25,000    $ 25,001
==================================================================================================================================


*    The Trust was audited by an independent registered public accounting
     firm other than Ernst & Young LLP.

**   The amount of distributions made to shareowners during the year were in
     excess of the net investment income earned by the Trust during the year.
     The Trust has accumulated undistributed net investment income which is
     part of the Trust's NAV. A portion of the accumulated net investment
     income was distributed to shareowners during the year.

(a)  The per common share data presented above is based upon the average
     common shares outstanding for the periods presented.

(b)  Total investment return is calculated assuming a purchase of common
     shares at the current net asset value or market value on the first day and
     a sale at the current net asset value or market value on the last day of
     the periods reported. Dividends and distributions, if any, are assumed for
     purposes of this calculation to be reinvested at prices obtained under the
     Trust's dividend reinvestment plan. Total investment return does not
     reflect brokerage commissions. Past performance is not a guarantee of
     future results.

(c)  Expense ratios do not reflect the effect of distribution payments to
     preferred shareowners.

(d)  Prior to February 9, 2018 there were 4,040 Series A and Series B Auction
     Preferred Shares ("APS") outstanding with a liquidation preference of
     $25,000 per share. The Trust redeemed all 2,000 outstanding Series A APS on
     February 14, 2018 and all 2,040 outstanding Series B APS on February 15,
     2018.

(e)  The Trust issued 1,250 Variable Rate MuniFund Term Preferred Shares,
     with a liquidation preference of $100,000 per share, on February 9, 2018.

(f)  Market value is redemption value without an active market.

The accompanying notes are an integral part of these financial statements.

                Pioneer Municipal High Income Trust | Annual Report | 4/30/18 27


Notes to Financial Statements | 4/30/18

1. Organization and Significant Accounting Policies

Pioneer Municipal High Income Trust (the "Trust") was organized as a Delaware
statutory trust on March 13, 2003. Prior to commencing operations on July 21,
2003, the Trust had no operations other than matters relating to its
organization and registration as a diversified, closed-end management investment
company under the Investment Company Act of 1940, as amended.  The investment
objective of the Trust is to seek a high level of current income exempt from
regular federal income tax, and the Trust may, as a secondary objective, also
seek capital appreciation to the extent that it is consistent with its primary
investment objective.

On July 3, 2017, Amundi acquired Pioneer Investments, a group of asset
management companies located throughout the world. Amundi, one of the world's
largest asset managers, is headquartered in Paris, France. As a result of the
transaction, Pioneer Investment Management, Inc., the Trust's investment
adviser, became an indirect wholly owned subsidiary of Amundi and Amundi's
wholly owned subsidiary, Amundi USA, Inc. Prior to July 3, 2017, Pioneer
Investments was owned by Pioneer Global Asset Management S.p.A., a wholly owned
subsidiary of UniCredit S.p.A.

In connection with the transaction, the names of the Trust's investment adviser
and principal underwriter changed. Effective July 3, 2017, the name of Pioneer
Investment Management, Inc. changed to Amundi Pioneer Asset Management, Inc.
(the "Adviser") and the name of Pioneer Funds Distributor, Inc. changed to
Amundi Pioneer Distributor, Inc. (the "Distributor").

In October 2016, the Securities and Exchange Commission ("SEC") released its
Final Rule on Investment Company Reporting Modernization. In addition to
introducing two new regulatory reporting forms (Form N-PORT and Form N-CEN), the
Final Rule amends Regulation S-X, which impacts financial statement
presentation, particularly related to the presentation of derivative
investments. The Trust's financial statements were prepared in compliance with
the amendments to Regulation S-X.

The Trust's financial statements have been prepared in conformity with U.S.
generally accepted accounting principles ("U.S. GAAP") that require the
management of the Trust to make estimates and assumptions that affect the
reported amounts of assets and liabilities, the disclosure of contingent assets
and liabilities at the date of the financial statements, and the reported
amounts of income, expenses and gain or loss on investments during the reporting
period. Actual results could differ from those estimates.

28 Pioneer Municipal High Income Trust | Annual Report | 4/30/18


The Trust is an investment company and follows investment company accounting and
reporting guidance under U.S. GAAP. The following is a summary of significant
accounting policies followed by the Trust in the preparation of its financial
statements:

A.   Security Valuation

     The net asset value of the Trust is computed once daily, on each day the
     New York Stock Exchange ("NYSE") is open, as of the close of regular
     trading on the NYSE.

     Fixed-income securities are valued by using prices supplied by independent
     pricing services, which consider such factors as market prices, market
     events, quotations from one or more brokers, Treasury spreads, yields,
     maturities and ratings, or may use a pricing matrix or other fair value
     methods or techniques to provide an estimated value of the security or
     instrument. A pricing matrix is a means of valuing a debt security on the
     basis of current market prices for other debt securities, historical
     trading patterns in the market for fixed-income securities and/or other
     factors. Non-U.S. debt securities that are listed on an exchange will be
     valued at the bid price obtained from an independent third party pricing
     service. When independent third party pricing services are unable to
     supply prices, or when prices or market quotations are considered to be
     unreliable, the value of that security may be determined using quotations
     from one or more broker-dealers.

     Cash may include overnight time deposits at approved financial
     institutions.

     Securities for which independent pricing services or broker-dealers are
     unable to supply prices or for which market prices and/or quotations are
     not readily available or are considered to be unreliable are valued by a
     fair valuation team comprised of certain personnel of the Adviser pursuant
     to procedures adopted by the Trust's Board of Trustees. The Adviser's fair
     valuation team uses fair value methods approved by the Valuation Committee
     of the Board of Trustees. The Adviser's fair valuation team is responsible
     for monitoring developments that may impact fair valued securities and for
     discussing and assessing fair values on an ongoing basis, and at least
     quarterly, with the Valuation Committee of the Board of Trustees.

     Inputs used when applying fair value methods to value a security may
     include credit ratings, the financial condition of the company, current
     market conditions and comparable securities. The Trust may use fair value
     methods if it is determined that a significant event has occurred after
     the close of the exchange or market on which the security trades and prior
     to the determination of the Trust's net asset value. Examples of a
     significant event might include political or economic news, corporate
     restructurings, natural

                Pioneer Municipal High Income Trust | Annual Report | 4/30/18 29


     disasters, terrorist activity or trading halts. Thus, the valuation of the
     Trust's securities may differ significantly from exchange prices and such
     differences could be material.

     At April 30, 2018, two securities were valued using fair value methods (in
     addition to securities valued using prices supplied by independent pricing
     services, broker-dealers or using third party insurance pricing model)
     representing 1.41% of net assets. The value of these fair valued securities
     was $4,007,000.

B.   Investment Income and Transactions

     Interest income, including interest on income-bearing cash accounts, is
     recorded on the accrual basis, net of unrecoverable foreign taxes withheld
     at the applicable country rates and net of income accrued on defaulted
     securities.

     Discounts and premiums on purchase prices of debt securities are accreted
     or amortized, respectively, daily, into interest income on an effective
     yield to maturity basis with a corresponding increase or decrease in the
     cost basis of the security. Premiums and discounts related to certain
     mortgage-backed securities are amortized or accreted in proportion to the
     monthly paydowns.

     Interest and dividend income payable by delivery of additional shares is
     reclassified as PIK (payment-in-kind) income upon receipt and is included
     in interest income.

     Security transactions are recorded as of trade date. Gains and losses on
     sales of investments are calculated on the identified cost method for both
     financial reporting and federal income tax purposes.

C.   Federal Income Taxes

     It is the Trust's policy to comply with the requirements of the Internal
     Revenue Code applicable to regulated investment companies and to
     distribute all of its net taxable income and net realized capital gains,
     if any, to its shareowners. Therefore, no provision for federal income
     taxes is required.  As of April 30, 2018, the Trust did not accrue any
     interest or penalties with respect to uncertain tax positions, which, if
     applicable, would be recorded as an income tax expense on the Statement of
     Operations. Tax returns filed within the prior three years remain subject
     to examination by federal and state tax authorities.

     The amount and character of income and capital gain distributions to
     shareowners are determined in accordance with federal income tax rules,
     which may differ from U.S. GAAP. Distributions in excess of net investment
     income or net realized gains are temporary overdistributions for financial

30 Pioneer Municipal High Income Trust | Annual Report | 4/30/18


     statement purposes resulting from differences in the recognition or
     reclassification of income or distributions for financial statements and
     tax purposes. Capital accounts within the financial statements are
     adjusted for permanent book/tax differences to reflect tax character, but
     are not adjusted for temporary differences.

     At April 30, 2018 the Trust reclassified $8,980,139 to decrease paid-in
     capital, $1,743,913 to decrease undistributed net investment income and
     $10,724,052 to decrease accumulated net realized loss on investments to
     reflect permanent book/tax differences. These adjustments have no impact
     on the net assets or results of operations.

     At April 30, 2018, the Trust was permitted to carry forward $963,252 of
     short-term capital losses and $28,080,192 of long-term capital losses
     without limitation. Capital loss carryforward not utilized and expired in
     2018 amounts to $8,980,139.

     The tax character of distributions paid to shareowners during the years
     ended April 30, 2018 and April 30, 2017 were as follows:



     ---------------------------------------------------------------------------
                                                      2018                  2017
     ---------------------------------------------------------------------------
                                                               
     Distributions paid from:
     Tax Exempt Distributions                  $15,643,034           $16,732,954
     Ordinary income                               413,602                71,250
     ---------------------------------------------------------------------------
          Total                                $16,056,636           $16,804,204
     ===========================================================================


     The following shows the components of distributable earnings (losses) on a
     federal income tax basis at April 30, 2018:



     ---------------------------------------------------------------------------
                                                                           2018
     ---------------------------------------------------------------------------
                                                               
     Distributable earnings:
     Undistributed ordinary income                                $     415,696
     Capital loss carryforward                                      (29,043,444)
     Other book/tax temporary differences                               419,668
     Undistributed tax-exempt income                                  2,686,387
     Unrealized appreciation                                          9,121,701
     ---------------------------------------------------------------------------
         Total                                                    $ (16,399,992)
     ===========================================================================


     The difference between book-basis and tax-basis unrealized
     appreciation/depreciation is primarily attributable to the book/tax
     differences in the accrual of income on securities in default, the
     difference between book and tax amortization methods and discounts on fixed
     income securities.

                Pioneer Municipal High Income Trust | Annual Report | 4/30/18 31


D.   Automatic Dividend Reinvestment Plan

     All shareowners whose shares are registered in their own names
     automatically participate in the Automatic Dividend Reinvestment Plan (the
     "Plan"), under which participants receive all dividends and capital gain
     distributions (collectively, dividends) in full and fractional shares of
     the Trust in lieu of cash. Shareowners may elect not to participate in the
     Plan.  Shareowners not participating in the Plan receive all dividends and
     capital gain distributions in cash. Participation in the Plan is
     completely voluntary and may be terminated or resumed at any time without
     penalty by notifying American Stock Transfer & Trust Company, the agent
     for shareowners in administering the Plan (the "Plan Agent"), in writing
     prior to any dividend record date; otherwise such termination or
     resumption will be effective with respect to any subsequently declared
     dividend or other distribution.

     If a shareowner's shares are held in the name of a brokerage firm, bank or
     other nominee, the shareowner can ask the firm or nominee to participate
     in the Plan on the shareowner's behalf. If the firm or nominee does not
     offer the Plan, dividends will be paid in cash to the shareowner of
     record. A firm or nominee may reinvest a shareowner's cash dividends in
     shares of the Trust on terms that differ from the terms of the Plan.

     Whenever the Trust declares a dividend on shares payable in cash,
     participants in the Plan will receive the equivalent in shares acquired by
     the Plan Agent either (i) through receipt of additional unissued but
     authorized shares from the Trust or (ii) by purchase of outstanding shares
     on the New York Stock Exchange or elsewhere. If, on the payment date for
     any dividend, the net asset value per share is equal to or less than the
     market price per share plus estimated brokerage trading fees (market
     premium), the Plan Agent will invest the dividend amount in newly issued
     shares. The number of newly issued shares to be credited to each account
     will be determined by dividing the dollar amount of the dividend by the
     net asset value per share on the date the shares are issued, provided that
     the maximum discount from the then current market price per share on the
     date of issuance does not exceed 5%. If, on the payment date for any
     dividend, the net asset value per share is greater than the market value
     (market discount), the Plan Agent will invest the dividend amount in
     shares acquired in open-market purchases. There are no brokerage charges
     with respect to newly issued shares. However, each participant will pay a
     pro rata share of brokerage trading fees incurred with respect to the Plan
     Agent's open-market purchases. Participating in the Plan does not relieve
     shareowners from any federal, state or local taxes which may be due on
     dividends paid in any taxable year. Shareowners holding Plan shares in a
     brokerage account may be able to transfer the shares to another broker and
     continue to participate in the Plan.

32 Pioneer Municipal High Income Trust | Annual Report | 4/30/18


E.   Risks

     The value of securities held by the Trust may go up or down, sometimes
     rapidly or unpredictably, due to general market conditions, such as real
     or perceived adverse economic, political or regulatory conditions,
     inflation, changes in interest rates, lack of liquidity in the bond
     markets or adverse investor sentiment. In the past several years,
     financial markets have experienced increased volatility, depressed
     valuations, decreased liquidity and heightened uncertainty. These
     conditions may continue, recur, worsen or spread.

     Interest rates in the U.S. recently have been historically low, so the
     Trust faces a heightened risk that interest rates may rise. A general rise
     in interest rates could adversely affect the price and liquidity of fixed
     income securities.

     The municipal bond market can be susceptible to unusual volatility,
     particularly for lower-rated and unrated securities. Liquidity can be
     reduced unpredictably in response to overall economic conditions or credit
     tightening.  Municipal issuers may be adversely affected by rising health
     care costs, increasing unfunded pension liabilities, and by the phasing
     out of federal programs providing financial support. Unfavorable
     conditions and developments relating to projects financed with municipal
     securities can result in lower revenues to issuers of municipal
     securities, potentially resulting in defaults. Issuers often depend on
     revenues from these projects to make principal and interest payments. The
     value of municipal securities can also be adversely affected by changes in
     the financial condition of one or more individual municipal issuers or
     insurers of municipal issuers, regulatory and political developments, tax
     law changes or other legislative actions, and by uncertainties and public
     perceptions concerning these and other factors.  Municipal securities may
     be more susceptible to down-grades or defaults during recessions or
     similar periods of economic stress. In recent periods, an increasing
     number of municipal issuers in the United States have defaulted on
     obligations and commenced insolvency proceedings. Financial difficulties
     of municipal issuers may continue or get worse. To the extent the Trust
     invests significantly in a single state, including California, Illinois,
     Massachusetts, Texas and Washington, or in securities the payments on
     which are dependent upon a single project or source of revenues, or that
     relate to a sector or industry, including health care facilities,
     education, transportation, special revenues and pollution control, the
     Trust will be more susceptible to associated risks and developments.

                Pioneer Municipal High Income Trust | Annual Report | 4/30/18 33


     With the increased use of technologies such as the Internet to conduct
     business, the Trust is susceptible to operational, information security
     and related risks. While the Trust's Adviser has established business
     continuity plans in the event of, and risk management systems to prevent,
     limit or mitigate, such cyber-attacks, there are inherent limitations in
     such plans and systems including the possibility that certain risks have
     not been identified.  Furthermore, the Trust cannot control the
     cybersecurity plans and systems put in place by service providers to the
     Trust such as Brown Brothers Harriman & Co., the Trust's custodian and
     accounting agent, and American Stock Transfer & Trust Company ("AST"), the
     Trust's transfer agent. In addition, many beneficial owners of Trust
     shares hold them through accounts at broker-dealers, retirement platforms
     and other financial market participants over which neither the Trust nor
     Amundi Pioneer exercises control. Each of these may in turn rely on
     service providers to them, which are also subject to the risk of
     cyber-attacks. Cybersecurity failures or breaches at Amundi Pioneer or the
     Trust's service providers or intermediaries have the ability to cause
     disruptions and impact business operations potentially resulting in
     financial losses, interference with the Trust's ability to calculate its
     net asset value, impediments to trading, the inability of Trust
     shareowners to effect share purchases or receive distributions, loss of or
     unauthorized access to private shareowner information and violations of
     applicable privacy and other laws, regulatory fines, penalties,
     reputational damage, or additional compliance costs. Such costs and losses
     may not be covered under any insurance. In addition, maintaining vigilance
     against cyber-attacks may involve substantial costs over time, and system
     enhancements may themselves be subject to cyber-attacks.

2. Management Agreement

The Adviser manages the Trust's portfolio. Management fees payable under the
Trust's Advisory Agreement with the Adviser are calculated daily at the annual
rate of 0.60% of the Trust's average daily managed assets. "Managed assets"
means (a) the total assets of the Trust, including any form of investment
leverage, minus (b) all accrued liabilities incurred in the normal course of
operations, which shall not include any liabilities or obligations attributable
to investment leverage obtained through (i) indebtedness of any type (including,
without limitation, borrowing through a credit facility or the issuance of debt
securities), (ii) the issuance of preferred stock or other similar preference
securities, and/or (iii) any other means. For the year ended April 30, 2018, the
net management fee was 0.60% of the Trust's average daily managed assets, which
was equivalent to 0.82% of the Trust's average daily net assets.

34 Pioneer Municipal High Income Trust | Annual Report | 4/30/18


In addition, under the Adviser's management and administration agreements,
certain other services and costs are paid by the Adviser. At April 30, 2018,
$36,279 was payable to the Adviser related to management costs, administrative
costs and certain other services is included in "Due to affiliates" on the
Statement of Assets and Liabilities.

3. Transfer Agent

AST serves as the transfer agent with respect to the Trust's common shares.  The
Trust pays AST an annual fee, as is agreed to from time to time by the Trust and
AST, for providing such services.

In addition, the Trust reimbursed the transfer agent for out-of-pocket expenses
incurred by the transfer agent related to shareowner communications activities
such as proxy and statement mailings and outgoing calls.

Deutsche Bank Trust Company Americas ("Deutsche Bank") served as the transfer
agent, registrar, dividend-paying agent and auction agent with respect to the
Trust's auction preferred shares ("APS"). The Trust paid Deutsche Bank an annual
fee for providing such services.

4. Trust Shares

There are an unlimited number of common shares of beneficial interest
authorized.

Transactions in common shares of beneficial interest for the years ended April
30, 2018 and April 30, 2017 were as follows:



--------------------------------------------------------------------------------

                                                  4/30/18                4/30/17
--------------------------------------------------------------------------------
                                                                
Shares outstanding at beginning of year        22,771,349             22,756,724
Reinvestment of distributions                          --                 14,625
--------------------------------------------------------------------------------
Shares outstanding at end of year              22,771,349             22,771,349
================================================================================


The Trust may classify or reclassify any unissued shares of beneficial interest
into one or more series of preferred shares of beneficial interest.

As of April 30, 2018, the Trust has outstanding 1,250 Variable Rate Munifund
Term Preferred Shares Series 2021 ("Series 2021 VMTP Shares or "VMTP Shares").
The Trust issued the VMTP Shares on February 9, 2018. See Note 5 for additional
information.

Prior to February 9, 2018, the Trust had outstanding 2,000 Series A APS and
2,040 Series B APS. The Trust mailed a notice of redemption and deposited funds
sufficient to redeem the APS with the auction agent on February 9, 2018.  The
Trust redeemed all outstanding Series A APS and Series B APS on February 14,
2018 and February 15, 2018, respectively. See Note 6 for additional information.

                Pioneer Municipal High Income Trust | Annual Report | 4/30/18 35


5. Variable Rate MuniFund Term Preferred Shares

The Trust has 1,250 shares issued and outstanding of Series 2021 VMTP Shares,
with a liquidation preference of $100,000 per share. VMTP Shares are issued via
private placement and are not publicly available.

The Trust is obligated to redeem its VMTP Shares by the date as specified in its
offering document ("Term Redemption Date"), unless earlier redeemed by the
Trust. VMTP Shares are subject to optional and mandatory redemption in certain
circumstances. The VMTP Shares may be redeemed at the option of the Trust,
subject to payment of premium for approximately one year following the date of
issuance ("Optional Redemption Date"), and at the redemption price per share
thereafter. The redemption price per share is equal to the sum of the
liquidation preference per share plus any accumulated but unpaid dividends. The
Trust may be obligated to redeem a certain amount of the VMTP Shares if it fails
to maintain certain asset coverage and leverage ratio requirements and such
failures are not cured by the applicable cure date. The Term Redemption Date and
Optional Redemption Date for the Trust's Series 2021 VMTP Shares are August 2,
2021 and February 28, 2019, respectively.

VMTP Shares are subject to restrictions on transfer, generally do not trade, and
market quotations are generally not available. VMTP Shares are short-term or
short/intermediate-term instruments that pay a variable dividend rate tied to a
short-term index, plus an additional fixed "spread" amount established at the
time of issuance. For financial reporting purposes, the liquidation preference
of VMTP Shares is a liability and is recognized as a component of "Variable Rate
MuniFund Term Preferred Shares, net of deferred offering costs" on the Statement
of Assets and Liabilities.

Dividends on the VMTP Shares (which are treated as interest payments for
financial reporting purposes) are declared daily. The dividend rate for the VMTP
Shares is determined weekly. Unpaid dividends on VMTP Shares are recognized as a
component of "Dividend payable" on the Statement of Assets and Liabilities. From
February 22, 2018 (issuance) through April 30, 2018, the Series 2021 VMTP Shares
paid an average dividend rate of 2.32%.

Costs incurred in connection with the Trust's offering of VMTP Shares were
recorded as a deferred charge, which is being amortized over the life of the
shares and is recognized as a component of "Variable Rate MuniFund Term
Preferred Shares, net of deferred offering costs" on the Statement of Assets and
Liabilities.

36 Pioneer Municipal High Income Trust | Annual Report | 4/30/18


Transactions in the Series 2021 VMTP Shares during the Trust's current reporting
period were as follows:



---------------------------------------------------------------------------------------
                                                               Year Ended 4/30/18
                                                             Shares              Amount
---------------------------------------------------------------------------------------
                                                                     
VMTP Shares issued                                           1,250         $125,000,000
VMTP Shares exchanged                                           --                   --
---------------------------------------------------------------------------------------
Net increase                                                 1,250         $125,000,000
=======================================================================================


6. Redemption of APS

The Trust redeemed all of its outstanding APS at the liquidation preference per
share, together with accrued and unpaid dividends, if any, as of the redemption
date as follows:



---------------------------------------------------------------------------------------
                                                                                Accrued
                                                                             and Unpaid
                         Shares           Redemption       Preference         Dividends
 Series             Outstanding                 Date        Per Share         Per Share
---------------------------------------------------------------------------------------
                                                                 
 A                        2,000    February 14, 2018          $25,000           $12,288
---------------------------------------------------------------------------------------
 B                        2,040    February 15, 2018          $25,000           $12,975
---------------------------------------------------------------------------------------


The Trust continues to employ leverage for investment purposes through the
issuance of VMTP shares. See note 5 for additional information.

7. Dividends to APS Shareowners

Prior to the redemption of the Trust's APS (See Note 6), dividends on Series A
and Series B were cumulative at a rate which reset every seven days based on the
results of an auction. Since February 2008, the Trust's auctions related to the
APS failed. Accordingly, during the period, dividends were paid at the maximum
rate on the auction dates described in the prospectus for the APS.  The maximum
rate for each series was 125% of the 7 day commercial paper rate or adjusted
Kenny rate. Dividend rates on APS ranged from 1.414% to 3.260% during the year
ended April 30, 2018.

8. Subsequent Events

A monthly dividend was declared on May 4, 2018 from undistributed and
accumulated net investment income of $0.0525 per common share payable May 31,
2018, to common shareowners of record on May 16, 2018.

Subsequent to April 30, 2018, dividends declared and paid on VMTP Shares totaled
$260,943 through May 30, 2018.

                Pioneer Municipal High Income Trust | Annual Report | 4/30/18 37


Report of Independent Registered Public Accounting Firm

To the Board of Trustees and the Shareholders of
Pioneer Municipal High Income Trust:
--------------------------------------------------------------------------------

Opinion on the Financial Statements

We have audited the accompanying statement of assets and liabilities of Pioneer
Municipal High Income Trust (the "Trust"), including the schedule of
investments, as of April 30, 2018, and the related statements of operations,
changes in net assets, and the financial highlights for the year then ended and
the related notes and the financial highlights for the year ended April 30, 2014
(collectively referred to as the "financial statements"). The statement of
changes in net assets for the year ended April 30, 2017 and the financial
highlights for the periods ended April 30, 2015, April 30, 2016 and April 30,
2017 were audited by another independent registered public accounting firm whose
report, dated June 19, 2017, expressed an unqualified opinion on the statement
of changes in net assets and those financial highlights. In our opinion, the
financial statements present fairly, in all material respects, the financial
position of Pioneer Municipal High Income Trust at April 30, 2018, the results
of its operations, the changes in its net assets, and the financial highlights
for the year ended and the financial highlights for the year ended April 30,
2014, in conformity with U.S. generally accepted accounting principles.

Basis for Opinion

These financial statements are the responsibility of the Trust's management.
Our responsibility is to express an opinion on the Trust's financial statements
based on our audits. We are a public accounting firm registered with the Public
Company Accounting Oversight Board (United States) ("PCAOB") and are required to
be independent with respect to the Trust in accordance with the U.S. federal
securities laws and the applicable rules and regulations of the Securities and
Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB.  Those
standards require that we plan and perform the audit to obtain reasonable
assurance about whether the financial statements are free of material
misstatement, whether due to error or fraud. The Trust is not required to have,
nor were we engaged to perform, an audit of the Trust's internal control over
financial reporting. As part of our audits, we are required to obtain an
understanding of internal control over financial reporting, but not for the
purpose of expressing an opinion on the effectiveness of the Trust's internal
control over financial reporting. Accordingly, we express no such opinion.

38 Pioneer Municipal High Income Trust | Annual Report | 4/30/18


Our audits included performing procedures to assess the risks of material
misstatement of the financial statements, whether due to error or fraud, and
performing procedures that respond to those risks. Such procedures included
examining, on a test basis, evidence regarding the amounts and disclosures in
the financial statements. Our procedures included confirmation of securities
owned as of April 30, 2018, by correspondence with the custodian and brokers or
by other appropriate auditing procedures where replies from brokers were not
received. Our audits also included evaluating the accounting principles used and
significant estimates made by management, as well as evaluating the overall
presentation of the financial statements. We believe that our audits provide a
reasonable basis for our opinion.

                                                           /s/ Ernst & Young LLP

Boston, Massachusetts
We have served as the Trust's auditor since 2017.
June 25, 2018

                Pioneer Municipal High Income Trust | Annual Report | 4/30/18 39


ADDITIONAL INFORMATION (unaudited)

During the period, there have been no material changes in the Trust's investment
objective or fundamental policies that have not been approved by the
shareowners. There have been no changes in the Trust's charter or By-Laws that
would delay or prevent a change in control of the Trust which has not been
approved by the shareowners. During the period, there have been no changes in
the principal risk factors associated with investment in the Trust.  There were
no changes in the persons who are primarily responsible for the day-to-day
management of the Trust's portfolio.

Notice is hereby given in accordance with Section 23(c) of the Investment
Company Act of 1940 that the Trust may purchase, from time to time, its shares
in the open market.

Change in Independent Registered Public Accounting Firm

Prior to July 3, 2017 Pioneer Investment Management, Inc. (the "Adviser"), the
Trust's investment adviser, was an indirect, wholly owned subsidiary of
UniCredit S.p.A. ("UniCredit"). On that date, UniCredit completed the sale of
its Pioneer Investments business, which includes the Adviser, to Amundi (the
"Transaction"). As a result of the Transaction, the Adviser became an indirect,
wholly owned subsidiary of Amundi. Amundi is controlled by Credit Agricole S.A.
Amundi is headquartered in Paris, France, and, as of September 30, 2016, had
more than $1.1 trillion in assets under management worldwide. Deloitte & Touche
LLP ("D&T"), the Trust's previous independent registered public accounting firm,
informed the Audit Committee and the Board that it would no longer be
independent with respect to the Trust upon the completion of the Transaction as
a result of certain services being provided to Amundi and Credit Agricole, and,
accordingly, that it intended to resign as the Trust's independent registered
public accounting firm upon the completion of the Transaction. D&T's resignation
was effective on July 3, 2017, when the Transaction was completed.

During the periods as to which D&T has served as the Trust's independent
registered public accounting firm, including the Trust's two most recent fiscal
years, D&T's reports on the Trust's financial statements have not contained an
adverse opinion or disclaimer of opinion and have not been qualified or modified
as to uncertainty, audit scope or accounting principles. Further, there have
been no disagreements with D&T on any matter of accounting principles or
practices, financial statement disclosure, or auditing scope or procedure,
which, if not resolved to the satisfaction of D&T, would have caused D&T to make
reference to the subject matter of the disagreement in connection with its
report on the financial statements. In addition, there have been no reportable
events of the kind described in Item 304(a)(1)(v) of Regulation S-K under the
Securities Exchange Act of 1934.

40 Pioneer Municipal High Income Trust | Annual Report | 4/30/18


Effective immediately following the completion of the Transaction on July 3,
2017, the Board, acting upon the recommendation of the Audit Committee, engaged
a new independent registered public accounting firm, Ernst & Young LLP ("EY"),
for the Trust's fiscal year ended April 30, 2018.

Prior to its engagement, EY had advised the Trust's Audit Committee that EY had
identified the following matters, in each case relating to services rendered by
other member firms of Ernst & Young Global Limited, all of which are located
outside the United States, to UniCredit and certain of its subsidiaries during
the period commencing July 1, 2016, that it determined to be inconsistent with
the auditor independence rules set forth by the Securities and Exchange
Commission ("SEC"): (a) project management support services to UniCredit in the
Czech Republic, Germany, Italy, Serbia and Slovenia in relation to twenty-two
projects, that were determined to be inconsistent with Rule 2-01(c)(4)(vi) of
Regulation S-X (management functions); (b) two engagements for UniCredit in
Italy where fees were contingent/success based and that were determined to be
inconsistent with Rule 2-01(c)(5) of Regulation S-X (contingent fees); (c) four
engagements where legal and expert services were provided to UniCredit in the
Czech Republic and Germany, and twenty engagements where the legal advisory
services were provided to UniCredit in Austria, Czech Republic, Italy and
Poland, that were determined to be inconsistent with Rule 2-01(c)(4)(ix) and (x)
of Regulation S-X (legal and expert services); and (d) two engagements for
UniCredit in Italy involving assistance in the sale of certain assets, that were
determined to be inconsistent with Rule 2-01(c)(4)(viii) of Regulation S-X
(broker-dealer, investment adviser or investment banking services). None of the
foregoing services involved the Trust, any of the other Trusts in the Pioneer
Family of Trusts or any other Pioneer entity sold by UniCredit in the
Transaction.

EY advised the Audit Committee that it had considered the matters described
above and had concluded that such matters would not impair EY's ability to
exercise objective and impartial judgment in connection with the audits of the
financial statements of the Trust under the SEC and Public Company Accounting
Oversight Board independence rules, and that a reasonable investor with
knowledge of all relevant facts and circumstances would reach the same
conclusion. Management and the Audit Committee considered these matters and
discussed the matters with EY and, based upon EY's description of the matters
and statements made by EY, Management and the Audit Committee believe that EY
will be capable of exercising objective and impartial judgment in connection
with the audits of the financial statements of the Trust, and Management further
believes that a reasonable investor with knowledge of all relevant facts and
circumstances would reach the same conclusion.

                Pioneer Municipal High Income Trust | Annual Report | 4/30/18 41


Trustees, Officers and Service Providers

Investment Adviser
Amundi Pioneer Asset Management, Inc.

Custodian and Sub-Administrator
Brown Brothers Harriman & Co.

Independent Registered Public Accounting Firm
Ernst & Young LLP

Principal Underwriter
Amundi Pioneer Distributor, Inc.

Legal Counsel
Morgan, Lewis & Bockius LLP

Shareowner Services and Transfer Agent
American Stock Transfer & Trust Company

Proxy Voting Policies and Procedures of the Fund are available without charge,
upon request, by calling our toll free number (1-800-225-6292). Information
regarding how the Fund voted proxies relating to portfolio securities during the
most recent 12-month period ended June 30 is publicly available to shareowners
at www.amundipioneer.com. This information is also available on the Securities
and Exchange Commission's web site at www.sec.gov.

Trustees and Officers

The Trust's Trustees and officers are listed below, together with their
principal occupations and other directorships they have held during at least the
past five years. Trustees who are interested persons of the Trust within the
meaning of the 1940 Act are referred to as Interested Trustees. Trustees who are
not interested persons of the Trust are referred to as Independent Trustees.
Each of the Trustees serves as a Trustee of each of the 44 U.S. registered
investment portfolios for which Amundi Pioneer serves as investment adviser (the
"Pioneer Funds"). The address for all Trustees and all officers of the Trust is
60 State Street, Boston, Massachusetts 02109.

The Statement of Additional Information of the Fund includes additional
information about the Trustees and is available, without charge, upon request,
by calling 1-800-225-6292.

42 Pioneer Municipal High Income Trust | Annual Report | 4/30/18


Independent Trustees



------------------------------------------------------------------------------------------------------------------------------------
Name, Age and                 Term of Office and                                                     Other Directorships
Position Held With the Trust  Length of Service       Principal Occupation                           Held by Trustee
------------------------------------------------------------------------------------------------------------------------------------
                                                                                            
Thomas J. Perna (67)          Class III Trustee since Private investor (2004 - 2008 and 2013 -       Director, Broadridge
Chairman of the Board         2006. Term expires in   present); Chairman (2008 - 2013) and Chief     Financial Solutions, Inc.
and Trustee                   2018.                   Executive Officer (2008 - 2012), Quadriserv,   (investor communications and
                                                      Inc. (technology products for securities       securities processing
                                                      lending industry); and Senior Executive Vice   provider for financial
                                                      President, The Bank of New York (financial     services industry) (2009 -
                                                      and securities services) (1986 - 2004)         present); Director,
                                                                                                     Quadriserv, Inc. (2005 -
                                                                                                     2013); and Commissioner, New
                                                                                                     Jersey State Civil Service
                                                                                                     Commission (2011 - 2015)
------------------------------------------------------------------------------------------------------------------------------------
David R. Bock (74)            Class I Trustee         Managing Partner, Federal City Capital         Director of New York Mortgage
Trustee                       since 2005. Term        Advisors (corporate advisory services          Trust (publicly-traded
                              expires in 2019.        company) (1997 - 2004 and 2008 - present);     mortgage REIT) (2004 - 2009,
                                                      Interim Chief Executive Officer, Oxford        2012 - present); Director of
                                                      Analytica, Inc. (privately held research and   The Swiss Helvetia Fund, Inc.
                                                      consulting company) (2010); Executive Vice     (closed-end fund) (2010 -
                                                      President and Chief Financial Officer,         present); Director of Oxford
                                                      I-trax, Inc. (publicly traded health care      Analytica, Inc. (2008 -
                                                      services company) (2004 - 2007); and           present); and Director of
                                                      Executive Vice President and Chief Financial   Enterprise Community
                                                      Officer, Pedestal Inc. (internet-based         Investment, Inc.
                                                      mortgage trading company) (2000 - 2002);       (privately-held affordable
                                                      Private Consultant (1995 - 1997); Managing     housing finance company)
                                                      Director, Lehman Brothers (1992 - 1995); and   (1985 - 2010)
                                                      Executive, The World Bank (1979 - 1992)
------------------------------------------------------------------------------------------------------------------------------------
Benjamin M. Friedman (73)     Class II Trustee since  William Joseph Maier Professor of Political    Trustee, Mellon Institutional
Trustee                       2008. Term expires in   Economy, Harvard University (1972 - present)   Funds Investment Trust and
                              2020.                                                                  Mellon Institutional Funds
                                                                                                     Master Portfolio (oversaw 17
                                                                                                     portfolios in fund complex)
                                                                                                     (1989 - 2008)
------------------------------------------------------------------------------------------------------------------------------------
Margaret B.W. Graham (70)     Class II Trustee since  Founding Director, Vice-President and          None
Trustee                       2002. Term expires in   Corporate Secretary, The Winthrop Group, Inc.
                              2020.                   (consulting firm) (1982 - present); Desautels
                                                      Faculty of Management, McGill University
                                                      (1999 - 2017); and Manager of Research
                                                      Operations and Organizational Learning, Xerox
                                                      PARC, Xerox's advance research center
                                                      (1990-1994)
------------------------------------------------------------------------------------------------------------------------------------


                Pioneer Municipal High Income Trust | Annual Report | 4/30/18 43


Independent Trustees (continued)



------------------------------------------------------------------------------------------------------------------------------------
Name, Age and                 Term of Office and                                                     Other Directorships
Position Held With the Trust  Length of Service       Principal Occupation                           Held by Trustee
------------------------------------------------------------------------------------------------------------------------------------
                                                                                            
Lorraine H. Monchak (62)      Class I Trustee         Chief Investment Officer, 1199 SEIU Funds      None
Trustee                       since 2015. Term        (healthcare workers union pension funds)
                              expires in 2019.        (2001 - present); Vice President -
                                                      International Investments Group, American
                                                      International Group, Inc. (insurance company)
                                                      (1993 - 2001); Vice President - Corporate
                                                      Finance and Treasury Group, Citibank, N.A.
                                                      (1980 - 1986 and 1990 - 1993); Vice President
                                                      - Asset/Liability Management Group, Federal
                                                      Farm Funding Corporation
                                                      (government-sponsored issuer of debt
                                                      securities) (1988 - 1990); Mortgage
                                                      Strategies Group, Shearson Lehman Hutton,
                                                      Inc. (investment bank) (1987 - 1988); and
                                                      Mortgage Strategies Group, Drexel Burnham
                                                      Lambert, Ltd. (investment bank) (1986 - 1987)
------------------------------------------------------------------------------------------------------------------------------------
Marguerite A. Piret (69)      Class III Trustee since President and Chief Executive Officer,         Director of New America High
Trustee                       2002. Term expires in   Newbury Piret Company (investment banking      Income Fund, Inc. (closed-end
                              2018.                   firm) (1981 - present)                         investment company) (2004 -
                                                                                                     present); and Member, Board
                                                                                                     of Governors, Investment
                                                                                                     Company Institute (2000 -
                                                                                                     2006)
------------------------------------------------------------------------------------------------------------------------------------
Fred J. Ricciardi (71)        Class III Trustee since Consultant (investment company services)       None
Trustee                       2014. Term expires in   (2012 - present); Executive Vice President,
                              2018.                   BNY Mellon (financial and investment company
                                                      services) (1969 - 2012); Director, BNY
                                                      International Financing Corp. (financial
                                                      services) (2002 - 2012); and Director, Mellon
                                                      Overseas Investment Corp. (financial
                                                      services) (2009 - 2012)
------------------------------------------------------------------------------------------------------------------------------------


44 Pioneer Municipal High Income Trust | Annual Report | 4/30/18


Interested Trustees



------------------------------------------------------------------------------------------------------------------------------------
Name, Age and                 Term of Office and                                                     Other Directorships
Position Held With the Trust  Length of Service       Principal Occupation                           Held by Trustee
------------------------------------------------------------------------------------------------------------------------------------
                                                                                            
Lisa M. Jones (56)*           Class I Trustee         Director, CEO and President of Amundi Pioneer  None
Trustee, President and        since 2015. Term        Asset Management USA, Inc. (since September
Chief Executive Officer       expires in 2019.        2014); Director, CEO and President of Amundi
                                                      Pioneer Asset Management, Inc. (since
                                                      September 2014); Director, CEO and President
                                                      of Amundi Pioneer Distributor, Inc. (since
                                                      September 2014); Director, CEO and President
                                                      of Amundi Pioneer Institutional Asset
                                                      Management, Inc. (since September 2014);
                                                      Chair, Amundi Pioneer Asset Management USA,
                                                      Inc., Amundi Pioneer Distributor, Inc. and
                                                      Amundi Pioneer Institutional Asset
                                                      Management, Inc. (September 2014 - 2018);
                                                      Managing Director, Morgan Stanley Investment
                                                      Management (2010 - 2013); and Director of
                                                      Institutional Business, CEO of International,
                                                      Eaton Vance Management (2005 - 2010)
------------------------------------------------------------------------------------------------------------------------------------
Kenneth J. Taubes (60)*       Class II Trustee since  Director and Executive Vice President (since   None
Trustee                       2014. Term expires in   2008) and Chief Investment Officer, U.S.
                              2020.                   (since 2010) of Amundi Pioneer Asset
                                                      Management USA, Inc.; Executive Vice
                                                      President and Chief Investment Officer, U.S.
                                                      of Amundi Pioneer (since 2008); Executive
                                                      Vice President of Amundi Pioneer
                                                      Institutional Asset Management, Inc. (since
                                                      2009); and Portfolio Manager of Amundi
                                                      Pioneer (since 1999)
------------------------------------------------------------------------------------------------------------------------------------


*    Ms. Jones and Mr. Taubes are Interested Trustees because they are officers
     or directors of the Trust's investment adviser and certain of its
     affiliates.

Pioneer Municipal High Income Trust | Annual Report | 4/30/18 45


Trust Officers



------------------------------------------------------------------------------------------------------------------------------------
Name, Age and                 Term of Office and                                                     Other Directorships
Position Held With the Trust  Length of Service       Principal Occupation                           Held by Trustee
------------------------------------------------------------------------------------------------------------------------------------
                                                                                            
Christopher J. Kelley (53)    Since 2003. Serves at   Vice President and Associate General Counsel   None
Secretary and Chief Legal     the discretion of the   of Amundi Pioneer since January 2008;
Officer                       Board                   Secretary and Chief Legal Officer of all of
                                                      the Pioneer Funds since June 2010; Assistant
                                                      Secretary of all of the Pioneer Funds from
                                                      September 2003 to May 2010; and Vice
                                                      President and Senior Counsel of Amundi
                                                      Pioneer from July 2002 to December 2007
------------------------------------------------------------------------------------------------------------------------------------
Carol B. Hannigan (57)        Since 2010. Serves at   Fund Governance Director of Amundi Pioneer     None
Assistant Secretary           the discretion of the   since December 2006 and Assistant Secretary
                              Board                   of all the Pioneer Funds since June 2010;
                                                      Manager - Fund Governance of Amundi Pioneer
                                                      from December 2003 to November 2006; and
                                                      Senior Paralegal of Amundi Pioneer from
                                                      January 2000 to November 2003
------------------------------------------------------------------------------------------------------------------------------------
Thomas Reyes (55)             Since 2010. Serves at   Senior Counsel of Amundi Pioneer since May     None
Assistant Secretary           the discretion of the   2013 and Assistant Secretary of all the
                              Board                   Pioneer Funds since June 2010; and Counsel of
                                                      Amundi Pioneer from June 2007 to May 2013
------------------------------------------------------------------------------------------------------------------------------------
Mark E. Bradley (58)          Since 2008. Serves at   Vice President - Fund Treasury of Amundi       None
Treasurer and Chief Financial the discretion of the   Pioneer; Treasurer of all of the Pioneer
and Accounting Officer        Board                   Funds since March 2008; Deputy Treasurer of
                                                      Amundi Pioneer from March 2004 to February
                                                      2008; and Assistant Treasurer of all of the
                                                      Pioneer Funds from March 2004 to February
                                                      2008
------------------------------------------------------------------------------------------------------------------------------------
Luis I. Presutti (53)         Since 2003. Serves at   Director - Fund Treasury of Amundi Pioneer;    None
Assistant Treasurer           the discretion of the   and Assistant Treasurer of all of the Pioneer
                              Board                   Funds
------------------------------------------------------------------------------------------------------------------------------------
Gary Sullivan (60)            Since 2003. Serves at   Fund Accounting Manager - Fund Treasury of     None
Assistant Treasurer           the discretion of the   Amundi Pioneer; and Assistant Treasurer of
                              Board                   all of the Pioneer Funds
------------------------------------------------------------------------------------------------------------------------------------
David F. Johnson (38)         Since 2009. Serves at   Fund Administration Manager - Fund Treasury    None
Assistant Treasurer           the discretion of the   of Amundi Pioneer since November 2008;
                              Board                   Assistant Treasurer of all of the Pioneer
                                                      Funds since January 2009; and Client Service
                                                      Manager - Institutional Investor Services at
                                                      State Street Bank from March 2003 to March
                                                      2007
------------------------------------------------------------------------------------------------------------------------------------


46 Pioneer Municipal High Income Trust | Annual Report | 4/30/18




------------------------------------------------------------------------------------------------------------------------------------
Name, Age and                 Term of Office and                                                    Other Directorships
Position Held With the Trust  Length of Service       Principal Occupation                          Held by Trustee
------------------------------------------------------------------------------------------------------------------------------------
                                                                                           
Jean M. Bradley (65)          Since 2010. Serves at   Chief Compliance Officer of Amundi Pioneer    None
Chief Compliance Officer      the discretion of the   and of all the Pioneer Funds since
                              Board                   March 2010; Chief Compliance Officer of
                                                      Amundi Pioneer Institutional Asset
                                                      Management, Inc. since January 2012; Chief
                                                      Compliance Officer of Vanderbilt Capital
                                                      Advisors, LLC since July 2012: Director of
                                                      Adviser and Portfolio Compliance at Amundi
                                                      Pioneer since October 2005; and Senior
                                                      Compliance Officer for Columbia Management
                                                      Advisers, Inc. from October 2003 to October
                                                      2005
------------------------------------------------------------------------------------------------------------------------------------
Kelly O'Donnell (47)          Since 2006. Serves at   Vice President - Investor Services Group of   None
Anti-Money Laundering         the discretion of the   Amundi Pioneer and Anti-Money Laundering
Officer                       Board                   Officer of all the Pioneer Funds since 2006
------------------------------------------------------------------------------------------------------------------------------------


                Pioneer Municipal High Income Trust | Annual Report | 4/30/18 47


                        This page is for your notes.

48 Pioneer Municipal High Income Trust | Annual Report | 4/30/18


                        This page is for your notes.

                Pioneer Municipal High Income Trust | Annual Report | 4/30/18 49


                        This page is for your notes.

50 Pioneer Municipal High Income Trust | Annual Report | 4/30/18


                        This page is for your notes.

                Pioneer Municipal High Income Trust | Annual Report | 4/30/18 51


                        This page is for your notes.

52 Pioneer Municipal High Income Trust | Annual Report | 4/30/18


How to Contact Amundi Pioneer

We are pleased to offer a variety of convenient ways for you to contact us for
assistance or information.

You can call American Stock Transfer & Trust Company (AST) for:
--------------------------------------------------------------------------------
Account Information                                      1-800-710-0935

Or write to AST:
--------------------------------------------------------------------------------
For                                                      Write to

General inquiries, lost dividend checks,                 American Stock
change of address, lost stock certificates,              Transfer & Trust
stock transfer                                           Operations Center
                                                         6201 15th Ave.
                                                         Brooklyn, NY 11219

Dividend reinvestment plan (DRIP)                        American Stock
                                                         Transfer & Trust
                                                         Wall Street Station
                                                         P.O. Box 922
                                                         New York, NY 10269-0560

Website www.amstock.com

For additional information, please contact your investment advisor or visit our
web site www.amundipioneer.com.

The Trust files a complete schedule of investments with the Securities and
Exchange Commission for the first and third quarters for each fiscal year on
Form N-Q. Shareowners may view the filed Form N-Q by visiting the Commission's
web site at www.sec.gov. The filed form may also be viewed and copied at the
Commission's Public Reference Room in Washington, DC. Information regarding the
operations of the Public Reference Room may be obtained by calling
1-800-SEC-0330.


[LOGO]  Amundi Pioneer
        ==============
      ASSET MANAGEMENT

Amundi Pioneer Asset Management, Inc.
60 State Street
Boston, MA 02109
www.amundipioneer.com

Securities offered through Amundi Pioneer Distributor, Inc.
60 State Street, Boston, MA 02109
Underwriter of Pioneer Mutual Funds, Member SIPC
(C)2018 Amundi Pioneer Asset Management 19384-12-0618



ITEM 2. CODE OF ETHICS.

(a) Disclose whether, as of the end of the period covered by the report, the
registrant has adopted a code of ethics that applies to the registrant's
principal executive officer, principal financial officer, principal accounting
officer or controller, or persons performing similar functions, regardless of
whether these individuals are employed by the registrant or a third party.  If
the registrant has not adopted such a code of ethics, explain why it has not
done so.

The registrant has adopted, as of the end of the period covered by this report,
a code of ethics that applies to the registrant's principal executive officer,
principal financial officer, principal accounting officer and controller.

(b) For purposes of this Item, the term "code of ethics" means written standards
that are reasonably designed to deter wrongdoing and to promote:

        (1) Honest and ethical conduct, including the ethical handling of actual
        or apparent conflicts of interest between personal and professional
        relationships;

        (2) Full, fair, accurate, timely, and understandable disclosure in
        reports and documents that a registrant files with, or submits to, the
        Commission and in other public communications made by the registrant;

        (3) Compliance with applicable governmental laws, rules, and
        regulations;

        (4) The prompt internal reporting of violations of the code to an
        appropriate person or persons identified in the code; and

        (5) Accountability for adherence to the code.

(c) The registrant must briefly describe the nature of any amendment, during the
period covered by the report, to a provision of its code of ethics that applies
to the registrant's principal executive officer, principal financial officer,
principal accounting officer or controller, or persons performing similar
functions, regardless of whether these individuals are employed by the
registrant or a third party, and that relates to any element of the code of
ethics definition enumerated in paragraph (b) of this Item. The registrant must
file a copy of any such amendment as an exhibit pursuant to Item 10(a), unless
the registrant has elected to satisfy paragraph (f) of this Item by posting its
code of ethics on its website pursuant to paragraph (f)(2) of this Item, or by
undertaking to provide its code of ethics to any person without charge, upon
request, pursuant to paragraph (f)(3) of this Item.

The registrant has made no amendments to the code of ethics during the period
covered by this report.

(d) If the registrant has, during the period covered by the report, granted a
waiver, including an implicit waiver, from a provision of the code of ethics to
the registrant's principal executive officer, principal financial officer,
principal accounting officer or controller, or persons performing similar
functions, regardless of whether these individuals are employed by the
registrant or a third party, that relates to one or more of the items set forth
in paragraph (b) of this Item, the registrant must briefly describe the nature
of the waiver, the name of the person to whom the waiver was granted, and the
date of the waiver.

Not applicable.

(e) If the registrant intends to satisfy the disclosure requirement under
paragraph (c) or (d) of this Item regarding an amendment to, or a waiver from,
a provision of its code of ethics that applies to the registrant's principal
executive officer, principal financial officer, principal accounting officer or
controller, or persons performing similar functions and that relates to any
element of the code of ethics definition enumerated in paragraph (b) of this
Item by posting such information on its Internet website, disclose the
registrant's Internet address and such intention.

Not applicable.

(f) The registrant must:

        (1) File with the Commission, pursuant to Item 12(a)(1), a copy of
        its code of ethics that applies to the registrant's principal
        executive officer,principal financial officer, principal accounting
        officer or controller, or persons performing similar functions,
        as an exhibit to its annual
        report on this Form N-CSR (see attachment);

        (2) Post the text of such code of ethics on its Internet website and
        disclose, in its most recent report on this Form N-CSR, its Internet
        address and the fact that it has posted such code of ethics on its
        Internet website; or

        (3) Undertake in its most recent report on this Form N-CSR to provide to
        any person without charge, upon request, a copy of such code of ethics
        and explain the manner in which such request may be made.
	See Item 10(2)

ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT.

(a) (1)  Disclose that the registrant's board of trustees has determined that
         the registrant either:

    (i)  Has at least one audit committee financial expert serving on its audit
         committee; or

    (ii) Does not have an audit committee financial expert serving on its audit
         committee.

The registrant's Board of Trustees has determined that the registrant has at
least one audit committee financial expert.

    (2) If the registrant provides the disclosure required by paragraph
(a)(1)(i) of this Item, it must disclose the name of the audit committee
financial expert and whether that person is "independent." In order to be
considered "independent" for purposes of this Item, a member of an audit
committee may not, other than in his or her capacity as a member of the audit
committee, the board of trustees, or any other board committee:

    (i)  Accept directly or indirectly any consulting, advisory, or other
         compensatory fee from the issuer; or

    (ii) Be an "interested person" of the investment company as defined in
         Section 2(a)(19) of the Act (15 U.S.C. 80a-2(a)(19)).

Ms. Marguerite A. Piret, an independent trustee, is such an audit committee
financial expert.

    (3) If the registrant provides the disclosure required by paragraph (a)(1)
(ii) of this Item, it must explain why it does not have an audit committee
financial expert.

Not applicable.


ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES.

(a) Disclose, under the caption AUDIT FEES, the aggregate fees billed for each
of the last two fiscal years for professional services rendered by the principal
accountant for the audit of the registrant's annual financial statements or
services that are normally provided by the accountant in connection with
statutory and regulatory filings or engagements for those fiscal years.

The audit fees for the Trust were $50,500
payable to Ernst & Young LLP for the year ended
April 30, 2018 and $51,534 payable to Deloitte & Touche LLP
for the year ended April 30, 2017.


(b) Disclose, under the caption AUDIT-RELATED FEES, the aggregate fees billed in
each of the last two fiscal years for assurance and related services by the
principal accountant that are reasonably related to the performance of the audit
of the registrant's financial statements and are not reported under
paragraph (a) of this Item. Registrants shall describe the nature of the
services comprising the fees disclosed under this category.

There were no audit-related services in 2018 or 2017.


(c) Disclose, under the caption TAX FEES, the aggregate fees billed in each of
the last two fiscal years for professional services rendered by the principal
accountant for tax compliance, tax advice, and tax planning. Registrants shall
describe the nature of the services comprising the fees disclosed under this
category.

The tax fees for the Trust were $8,028
payable to Ernst & Young LLP for the year ended
April 30, 2018 and $9,904 payable to Deloitte & Touche LLP
for the year ended April 30, 2017.


(d) Disclose, under the caption ALL OTHER FEES, the aggregate fees billed in
each of the last two fiscal years for products and services provided by the
principal accountant, other than the services reported in paragraphs (a) through
(c) of this Item. Registrants shall describe the nature of the services
comprising the fees disclosed under this category.

There were no other fees in 2018 or 2017.

(e) (1) Disclose the audit committee's pre-approval policies and procedures
described in paragraph (c)(7) of Rule 2-01 of Regulation S-X.

 PIONEER FUNDS
            APPROVAL OF AUDIT, AUDIT-RELATED, TAX AND OTHER SERVICES
                       PROVIDED BY THE INDEPENDENT AUDITOR

                  SECTION I - POLICY PURPOSE AND APPLICABILITY

The Pioneer Funds recognize the importance of maintaining the independence of
their outside auditors. Maintaining independence is a shared responsibility
involving Amudi Pioneer Asset Management, Inc, the audit committee and
the independent auditors.

The Funds recognize that a Fund's independent auditors: 1) possess knowledge of
the Funds, 2) are able to incorporate certain services into the scope of the
audit, thereby avoiding redundant work, cost and disruption of Fund personnel
and processes, and 3) have expertise that has value to the Funds. As a result,
there are situations where it is desirable to use the Fund's independent
auditors for services in addition to the annual audit and where the potential
for conflicts of interests are minimal. Consequently, this policy, which is
intended to comply with Rule 210.2-01(C)(7), sets forth guidelines and
procedures to be followed by the Funds when retaining the independent audit firm
to perform audit, audit-related tax and other services under those
circumstances, while also maintaining independence.

Approval of a service in accordance with this policy for a Fund shall also
constitute approval for any other Fund whose pre-approval is required pursuant
to Rule 210.2-01(c)(7)(ii).

In addition to the procedures set forth in this policy, any non-audit services
that may be provided consistently with Rule 210.2-01 may be approved by the
Audit Committee itself and any pre-approval that may be waived in accordance
with Rule 210.2-01(c)(7)(i)(C) is hereby waived.

Selection of a Fund's independent auditors and their compensation shall be
determined by the Audit Committee and shall not be subject to this policy.



                               SECTION II - POLICY

---------------- -------------------------------- -------------------------------------------------
SERVICE           SERVICE CATEGORY DESCRIPTION      SPECIFIC PRE-APPROVED SERVICE SUBCATEGORIES
CATEGORY
---------------- -------------------------------- -------------------------------------------------
                                            
I.  AUDIT        Services that are directly       o Accounting research assistance
SERVICES         related to performing the        o SEC consultation, registration
                 independent audit of the Funds     statements, and reporting
                                                  o Tax accrual related matters
                                                  o Implementation of new accounting
                                                    standards
                                                  o Compliance letters (e.g. rating agency
                                                    letters)
                                                  o Regulatory reviews and assistance
                                                    regarding financial matters
                                                  o Semi-annual reviews (if requested)
                                                  o Comfort letters for closed end
                                                    offerings
---------------- -------------------------------- -------------------------------------------------
II.              Services which are not           o AICPA attest and agreed-upon procedures
AUDIT-RELATED    prohibited under Rule            o Technology control assessments
SERVICES         210.2-01(C)(4) (the "Rule")      o Financial reporting control assessments
                 and are related extensions of    o Enterprise security architecture
                 the audit services support the     assessment
                 audit, or use the
                 knowledge/expertise gained
                 from the audit procedures as a
                 foundation to complete the
                 project.  In most cases, if
                 the Audit-Related Services are
                 not performed by the Audit
                 firm, the scope of the Audit
                 Services would likely
                 increase.  The Services are
                 typically well-defined and
                 governed by accounting
                 professional standards (AICPA,
                 SEC, etc.)
---------------- -------------------------------- -------------------------------------------------

 ------------------------------------- ------------------------------------
                                    
   AUDIT COMMITTEE APPROVAL POLICY               AUDIT COMMITTEE
                                                REPORTING POLICY
 ------------------------------------- ------------------------------------
                                    
 o "One-time" pre-approval             o A summary of all such
   for the audit period for all          services and related fees
   pre-approved specific service         reported at each regularly
   subcategories.  Approval of the       scheduled Audit Committee
   independent auditors as               meeting.
   auditors for a Fund shall
   constitute pre approval for
   these services.
 ------------------------------------- ------------------------------------
 o "One-time" pre-approval             o A summary of all such
   for the fund fiscal year within       services and related fees
   a specified dollar limit              (including comparison to
   for all pre-approved                  specified dollar limits)
   specific service subcategories        reported quarterly.

 o Specific approval is
   needed to exceed the
   pre-approved dollar limit for
   these services (see general
   Audit Committee approval policy
   below for details on obtaining
   specific approvals)

 o Specific approval is
   needed to use the Fund's
   auditors for Audit-Related
   Services not denoted as
   "pre-approved", or
   to add a specific service
   subcategory as "pre-approved"
 ------------------------------------- ------------------------------------




                     SECTION III - POLICY DETAIL, CONTINUED

----------------------- --------------------------- -----------------------------------------------
   SERVICE CATEGORY          SERVICE CATEGORY        SPECIFIC PRE-APPROVED SERVICE SUBCATEGORIES
                               DESCRIPTION
----------------------- --------------------------- -----------------------------------------------
                                              
III. TAX SERVICES       Services which are not      o Tax planning and support
                        prohibited by the Rule,     o Tax controversy assistance
                        if an officer of the Fund   o Tax compliance, tax returns, excise
                        determines that using the     tax returns and support
                        Fund's auditor to provide   o Tax opinions
                        these services creates
                        significant synergy in
                        the form of efficiency,
                        minimized disruption, or
                        the ability to maintain a
                        desired level of
                        confidentiality.
----------------------- --------------------------- -----------------------------------------------

------------------------------------- -------------------------
  AUDIT COMMITTEE APPROVAL POLICY         AUDIT COMMITTEE
                                          REPORTING POLICY
------------------------------------- -------------------------
------------------------------------- -------------------------
o "One-time" pre-approval             o A summary of
  for the fund fiscal  year             all such services and
  within a specified dollar limit       related fees
  				        (including comparison
  			                to specified dollar
  			                limits) reported
  			                quarterly.

o Specific approval is
  needed to exceed the
  pre-approved dollar limits for
  these services (see general
  Audit Committee approval policy
  below for details on obtaining
  specific approvals)

o Specific approval is
  needed to use the Fund's
  auditors for tax services not
  denoted as pre-approved, or to add a specific
  service subcategory as
  "pre-approved"
------------------------------------- -------------------------




                     SECTION III - POLICY DETAIL, CONTINUED

----------------------- --------------------------- -----------------------------------------------
   SERVICE CATEGORY          SERVICE CATEGORY        SPECIFIC PRE-APPROVED SERVICE SUBCATEGORIES
                               DESCRIPTION
----------------------- --------------------------- -----------------------------------------------
                                              
IV.  OTHER SERVICES     Services which are not      o Business Risk Management support
                        prohibited by the Rule,     o Other control and regulatory
A. SYNERGISTIC,         if an officer of the Fund     compliance projects
UNIQUE QUALIFICATIONS   determines that using the
                        Fund's auditor to provide
                        these services creates
                        significant synergy in
                        the form of efficiency,
                        minimized disruption,
                        the ability to maintain a
                        desired level of
                        confidentiality, or where
                        the Fund's auditors
                        posses unique or superior
                        qualifications to provide
                        these services, resulting
                        in superior value and
                        results for the Fund.
----------------------- --------------------------- -----------------------------------------------

--------------------------------------- ------------------------
    AUDIT COMMITTEE APPROVAL POLICY         AUDIT COMMITTEE
                                            REPORTING POLICY
------------------------------------- --------------------------
                                   
o "One-time" pre-approval             o A summary of
  for the fund fiscal year within       all such services and
  a specified dollar limit              related fees
  			               (including comparison
  			                to specified dollar
  				        limits) reported
                                        quarterly.
o Specific approval is
  needed to exceed the
  pre-approved dollar limits for
  these services (see general
  Audit Committee approval policy
  below for details on obtaining
  specific approvals)

o Specific approval is
  needed to use the Fund's
  auditors for "Synergistic" or
  "Unique Qualifications" Other
  Services not denoted as
  pre-approved to the left, or to
  add a specific service
  subcategory as "pre-approved"
------------------------------------- --------------------------




                     SECTION III - POLICY DETAIL, CONTINUED

----------------------- ------------------------- -----------------------------------------------
   SERVICE CATEGORY         SERVICE CATEGORY        SPECIFIC PROHIBITED SERVICE SUBCATEGORIES
                              DESCRIPTION
----------------------- ------------------------- -----------------------------------------------
                                            
PROHIBITED  SERVICES    Services which result     1. Bookkeeping or other services
                        in the auditors losing       related to the accounting records or
                        independence status          financial statements of the audit
                        under the Rule.              client*
                                                  2. Financial information systems design
                                                     and implementation*
                                                  3. Appraisal or valuation services,
                                                     fairness* opinions, or
                                                     contribution-in-kind reports
                                                  4. Actuarial services (i.e., setting
                                                     actuarial reserves versus actuarial
                                                     audit work)*
                                                  5. Internal audit outsourcing services*
                                                  6. Management functions or human
                                                     resources
                                                  7. Broker or dealer, investment
                                                     advisor, or investment banking services
                                                  8. Legal services and expert services
                                                     unrelated to the audit
                                                  9. Any other service that the Public
                                                     Company Accounting Oversight Board
                                                     determines, by regulation, is
                                                     impermissible
----------------------- ------------------------- -----------------------------------------------

------------------------------------------- ------------------------------
     AUDIT COMMITTEE APPROVAL POLICY               AUDIT COMMITTEE
                                                  REPORTING POLICY
------------------------------------------- ------------------------------
o These services are not to be              o A summary of all
  performed with the exception of the(*)      services and related
  services that may be permitted              fees reported at each
  if they would not be subject to audit       regularly scheduled
  procedures at the audit client (as          Audit Committee meeting
  defined in rule 2-01(f)(4)) level           will serve as continual
  the firm providing the service.             confirmation that has
  				              not provided any
                                              restricted services.
------------------------------------------- ------------------------------

--------------------------------------------------------------------------------
GENERAL AUDIT COMMITTEE APPROVAL POLICY:
o For all projects, the officers of the Funds and the Fund's auditors will each
  make an assessment to determine that any proposed projects will not impair
  independence.

o Potential services will be classified into the four non-restricted service
  categories and the "Approval of Audit, Audit-Related, Tax and Other
  Services" Policy above will be applied. Any services outside the specific
  pre-approved service subcategories set forth above must be specifically
  approved by the Audit Committee.

o At least quarterly, the Audit Committee shall review a report summarizing the
  services by service category, including fees, provided by the Audit firm as
  set forth in the above policy.

--------------------------------------------------------------------------------


    (2) Disclose the percentage of services described in each of paragraphs (b)
   through (d) of this Item that were approved by the audit committee pursuant
   to paragraph (c)(7)(i)(C) of Rule 2-01 of Regulation S-X.

Non-Audit Services
Beginning with non-audit service contracts entered
into on or after May 6, 2003, the effective date of the
new SEC pre-approval rules, the Trust's audit
committee is required to pre-approve services to
affiliates defined by SEC rules to the extent that the
services are determined to have a direct impact on the
operations or financial reporting of the Trust.  For the
years ended April 30 2018 and 2017, there were no
services provided to an affiliate that required the
Trust's audit committee pre-approval.


(f) If greater than 50 percent, disclose the percentage of hours expended on the
principal accountants engagement to audit the registrant's financial statements
for the most recent fiscal year that were attributed to work performed by
persons other than the principal accountant's full-time, permanent employees.

N/A

(g) Disclose the aggregate non-audit fees billed by the registrants accountant
for services rendered to the registrant, and rendered to the registrants
investment adviser (not including any sub-adviser whose role is primarily
portfolio management and is subcontracted with or overseen by another investment
adviser), and any entity controlling, controlled by, or under common control
with the adviser that provides ongoing services to the registrant for each of
the last two fiscal years of the registrant.

The aggregate non-audit fees for the Trust were $8,028
payable to Ernst & Young LLP for the year ended
April 30, 2018 and $9,904 payable to Deloitte & Touche LLP
for the year ended April 30, 2017.


(h) Disclose whether the registrants audit committee of the board of trustees
has considered whether the provision of non-audit services that were rendered to
the registrants investment adviser (not including any subadviser whose role is
primarily portfolio management and is subcontracted with or overseen by another
investment adviser), and any entity controlling, controlled by, or under common
control with the investment adviser that provides ongoing services to the
registrant that were not pre-approved pursuant to paragraph (c)(7)(ii) of
Rule 2-01 of Regulation S-X is compatible with maintaining the principal
accountant's independence.

The Fund's audit committee of the Board of Trustees
has considered whether the provision of non-audit
services that were rendered to the Affiliates (as
defined) that were not pre- approved pursuant to
paragraph (c)(7)(ii) of Rule 2-01 of Regulation S-X is
compatible with maintaining the principal accountant's
independence.

ITEM 5. AUDIT COMMITTEE OF LISTED REGISTRANTS

(a) If the registrant is a listed issuer as defined in Rule 10A-3
under the Exchange Act (17 CFR 240.10A-3), state whether
or not the registrant has a separately-designated standing
 audit committee established in accordance with Section
3(a)(58)(A) of the Exchange Act (15 U.S.C. 78c(a)(58)(A)).
If the registrant has such a committee, however designated,
identify each committee member. If the entire board of directors
is acting as the registrant's audit committee as specified in
Section 3(a)(58)(B) of the Exchange Act (15 U.S.C. 78c(a)(58)(B)),
so state.

N/A

(b) If applicable, provide the disclosure required by Rule 10A-3(d)
under the Exchange Act (17 CFR 240.10A-3(d)) regarding an exemption
from the listing standards for audit committees.

N/A

ITEM 6. SCHEDULE OF INVESTMENTS.

File Schedule of Investments in securities of unaffiliated issuers
as of the close of the reporting period as set forth in 210.1212
of Regulation S-X [17 CFR 210.12-12], unless the schedule is
included as part of the report to shareholders filed under Item
1 of this Form.

Included in Item 1


ITEM 7. DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR
CLOSED-END MANAGEMENT INVESTMENT COMPANIES.

A closed-end management investment company that is filing an annual report on
this Form N-CSR must, unless it invests exclusively in non-voting securities,
describe the policies and procedures that it uses to determine how to vote
proxies relating to portfolio securities, including the procedures that the
company uses when a vote presents a conflict between the interests of its
shareholders, on the one hand, and those of the company's investment adviser;
principal underwriter; or any affiliated person (as defined in Section 2(a)(3)
of the Investment Company Act of 1940 (15 U.S.C. 80a-2(a)(3)) and the rules
thereunder) of the company, its investment adviser, or its principal
underwriter, on the other. Include any policies and procedures of the company's
investment adviser, or any other third party, that the company uses, or that are
used on the company's behalf, to determine how to vote proxies relating to
portfolio securities.

                     Proxy Voting Policies and Procedures of
                       Pioneer Investment Management, Inc.

                            VERSION DATED July, 2004

                                    Overview

   Pioneer Investment Management, Inc. ("Pioneer") is a fiduciary that owes
   each of its client's duties of care and loyalty with respect to all
   services undertaken on the client's behalf, including proxy voting. When
   Pioneer has been delegated proxy-voting authority for a client, the duty of
   care requires Pioneer to monitor corporate events and to vote the proxies.
   To satisfy its duty of loyalty, Pioneer must place its client's interests
   ahead of its own and must cast proxy votes in a manner consistent with the
   best interest of its clients. Pioneer will vote all proxies presented in a
   timely manner.

   The Proxy Voting Policies and Procedures are designed to complement
   Pioneer's investment policies and procedures regarding its general
   responsibility to monitor the performance and/or corporate events of
   companies that are issuers of securities held in accounts managed by
   Pioneer. Pioneer's Proxy Voting Policies summarize Pioneer's position on a
   number of issues solicited by companies held by Pioneer's clients. The
   policies are guidelines that provide a general indication on how Pioneer
   would vote but do not include all potential voting scenarios.

   Pioneer's Proxy Voting Procedures detail monitoring of voting, exception
   votes, and review of conflicts of interest and ensure that case-by-case
   votes are handled within the context of the overall guidelines (i.e. best
   interest of client). The overriding goal is that all proxies for US and
   non-US companies that are received promptly will be voted in accordance
   with Pioneer's policies or specific client instructions. All shares in a
   company held by Pioneer-managed accounts will be voted alike, unless a
   client has given us specific voting instructions on an issue or has not
   delegated authority to us or the Proxy Voting Oversight Group determines
   that the circumstances justify a different approach.

   Pioneer does not delegate the authority to vote proxies relating to its
   clients to any of its affiliates, which include other subsidiaries of
   UniCredito.

   Any questions about these policies and procedures should be directed to the
   Proxy Coordinator.

                                       1


                             Proxy Voting Procedures

   Proxy Voting Service
   Pioneer has engaged an independent proxy voting service to assist in the
   voting of proxies. The proxy voting service works with custodians to ensure
   that all proxy materials are received by the custodians and are processed
   in a timely fashion. To the extent applicable, the proxy voting service
   votes all proxies in accordance with the proxy voting policies established
   by Pioneer. The proxy voting service will refer proxy questions to the
   Proxy Coordinator (described below) for instructions under circumstances
   where: (1) the application of the proxy voting guidelines is unclear; (2) a
   particular proxy question is not covered by the guidelines; or (3) the
   guidelines call for specific instructions on a case-by-case basis. The
   proxy voting service is also requested to call to the Proxy Coordinator's
   attention specific proxy questions that, while governed by a guideline,
   appear to involve unusual or controversial issues. Pioneer reserves the
   right to attend a meeting in person and may do so when it determines that
   the company or the matters to be voted on at the meeting are strategically
   important to its clients.

   Proxy Coordinator
   Pioneer's Director of Investment Operations (the "Proxy Coordinator")
   coordinates the voting, procedures and reporting of proxies on behalf of
   Pioneer's clients. The Proxy Coordinator will deal directly with the proxy
   voting service and, in the case of proxy questions referred by the proxy
   voting service, will solicit voting recommendations and instructions from
   the Director of Portfolio Management US or, to the extent applicable,
   investment sub-advisers. The Proxy Coordinator is responsible for ensuring
   that these questions and referrals are responded to in a timely fashion and
   for transmitting appropriate voting instructions to the proxy voting
   service. The Proxy Coordinator is responsible for verifying with the
   Compliance Department whether Pioneer's voting power is subject to any
   limitations or guidelines issued by the client (or in the case of an
   employee benefit plan, the plan's trustee or other fiduciaries).

   Referral Items
   From time to time, the proxy voting service will refer proxy questions to
   the Proxy Coordinator that are described by Pioneer's policy as to be voted
   on a case-by-case basis, that are not covered by Pioneer's guidelines or
   where Pioneer's guidelines may be unclear with respect to the matter to be
   voted on. Under such certain circumstances, the Proxy Coordinator will seek
   a written voting recommendation from the Director of Portfolio Management
   US. Any such recommendation will include: (i) the manner in which the
   proxies should be voted; (ii) the rationale underlying any such decision;
   and (iii) the disclosure of any contacts or communications made between
   Pioneer and any outside parties concerning the proxy proposal prior to the
   time that the voting instructions are provided. In addition, the Proxy
   Coordinator will ask the Compliance Department to review the question for
   any actual or apparent conflicts of interest as described below under
   "Conflicts of

                                       2


   Interest." The Compliance Department will provide a "Conflicts of Interest
   Report," applying the criteria set forth below under "Conflicts of
   Interest," to the Proxy Coordinator summarizing the results of its review.
   In the absence of a conflict of interest, the Proxy Coordinator will vote
   in accordance with the recommendation of the Director of Portfolio
   Management US.

   If the matter presents a conflict of interest for Pioneer, then the Proxy
   Coordinator will refer the matter to the Proxy Voting Oversight Group for a
   decision. In general, when a conflict of interest is present, Pioneer will
   vote according to the recommendation of the Director of Portfolio
   Management US where such recommendation would go against Pioneer's interest
   or where the conflict is deemed to be immaterial. Pioneer will vote
   according to the recommendation of its proxy voting service when the
   conflict is deemed to be material and the Pioneer's internal vote
   recommendation would favor Pioneer's interest, unless a client specifically
   requests Pioneer to do otherwise. When making the final determination as to
   how to vote a proxy, the Proxy Voting Oversight Group will review the
   report from the Director of Portfolio Management US and the Conflicts of
   Interest Report issued by the Compliance Department.

   Conflicts of Interest
   A conflict of interest occurs when Pioneer's interests interfere, or appear
   to interfere with the interests of Pioneer's clients. Occasionally, Pioneer
   may have a conflict that can affect how its votes proxies. The conflict may
   be actual or perceived and may exist when the matter to be voted on
   concerns:

       o      An affiliate of Pioneer,  such as another company  belonging to
              the UniCredito  Italiano  S.p.A.  banking group (a "UniCredito
              Affiliate");

       o      An issuer of a security for which Pioneer acts as a sponsor,
              advisor, manager, custodian, distributor, underwriter, broker, or
              other similar capacity (including those securities specifically
              declared by PGAM to present a conflict of interest for Pioneer);

       o      An issuer of a security for which UniCredito has informed Pioneer
              that a UniCredito Affiliate acts as a sponsor, advisor, manager,
              custodian, distributor, underwriter, broker, or other similar
              capacity; or

       o      A person with whom Pioneer (or any of its affiliates) has an
              existing, material contract or business relationship that was not
              entered into in the ordinary course of Pioneer's business.

       o      Pioneer will abstain from voting with respect to companies
              directly or indirectly owned by UniCredito Italiano Group, unless
              otherwise directed by a client. In addition, Pioneer will inform
              PGAM Global Compliance and the PGAM Independent Directors before
              exercising such rights.

   Any associate involved in the proxy voting process with knowledge of any
   apparent or actual conflict of interest must disclose such conflict to the
   Proxy Coordinator and the Compliance Department. The Compliance Department
   will review each item referred to Pioneer to determine whether an actual or
   potential conflict of interest with Pioneer exists in connection with the
   proposal(s) to be voted upon. The review will be conducted by comparing the
   apparent parties affected by the proxy proposal being

                                       3


   voted upon against the Compliance Department's internal list of interested
   persons and, for any matches found, evaluating the anticipated magnitude
   and possible probability of any conflict of interest being present. For
   each referral item, the determination regarding the presence or absence of
   any actual or potential conflict of interest will be documented in a
   Conflicts of Interest Report to the Proxy Coordinator.

   Securities Lending
   In conjunction with industry standards Proxies are not available to be
   voted when the shares are out on loan through either Pioneer's lending
   program or a client's managed security lending program. However, Pioneer
   will reserve the right to recall lent securities so that they may be voted
   according to the Pioneer's instructions. If a portfolio manager would like
   to vote a block of previously lent shares, the Proxy Coordinator will work
   with the portfolio manager and Investment Operations to recall the
   security, to the extent possible, to facilitate the vote on the entire
   block of shares.

   Share-Blocking

   "Share-blocking" is a market practice whereby shares are sent to a
   custodian (which may be different than the account custodian) for record
   keeping and voting at the general meeting. The shares are unavailable for
   sale or delivery until the end of the blocking period (typically the day
   after general meeting date).

   Pioneer will vote in those countries with "share-blocking." In the event a
   manager would like to sell a security with "share-blocking", the Proxy
   Coordinator will work with the Portfolio Manager and Investment Operations
   Department to recall the shares (as allowable within the market time-frame
   and practices) and/or communicate with executing brokerage firm. A list of
   countries with "share-blocking" is available from the Investment Operations
   Department upon request.

   Record Keeping
   The Proxy Coordinator shall ensure that Pioneer's proxy voting service:

       o   Retains a copy of the proxy statement received (unless the proxy
           statement is available from the SEC's Electronic Data Gathering,
           Analysis, and Retrieval (EDGAR) system);

       o   Retains a record of the vote cast;

       o   Prepares Form N-PX for filing on behalf of each client that is a
           registered investment company; and

       o   Is able to promptly provide Pioneer with a copy of the voting
           record upon its request.

                                       4


   The Proxy Coordinator shall ensure that for those votes that may require
   additional documentation (i.e. conflicts of interest, exception votes and
   case-by-case votes) the following records are maintained:

       o    A record memorializing the basis for each referral vote cast;

       o    A copy of any document created by Pioneer that was material in
            making the decision on how to vote the subject proxy; and

       o    A copy of any conflict notice, conflict consent or any other
            written communication (including emails or other electronic
            communications) to or from the client (or in the case of an
            employee benefit plan, the plan's trustee or other fiduciaries)
            regarding the subject proxy vote cast by, or the vote
            recommendation of, Pioneer.

       o    Pioneer shall maintain the above records in the client's file for a
            period not less than ten (10) years.

     Disclosure
     Pioneer shall take reasonable measures to inform its clients of the process
     or procedures clients must follow to obtain information regarding how
     Pioneer voted with respect to assets held in their accounts. In addition,
     Pioneer shall describe to clients its proxy voting policies and procedures
     and will furnish a copy of its proxy voting policies and procedures upon
     request. This information may be provided to clients through Pioneer's Form
     ADV (Part II) disclosure, by separate notice to the client, or through
     Pioneer's website.

     Proxy Voting Oversight Group
     The members of the Proxy Voting Oversight Group are Pioneer's: Director of
     Portfolio Management US, Head of Investment Operations, and Director of
     Compliance. Other members of Pioneer will be invited to attend meetings and
     otherwise participate as necessary. The Head of Investment Operations will
     chair the Proxy Voting Oversight Group.

     The Proxy Voting Oversight Group is responsible for developing, evaluating,
     and changing (when necessary) Pioneer's Proxy Voting Policies and
     Procedures. The group meets at least annually to evaluate and review these
     policies and procedures and the services of its third-party proxy voting
     service. In addition, the Proxy Voting Oversight Group will meet as
     necessary to vote on referral items and address other business as
     necessary.

     Amendments
     Pioneer may not amend its Proxy Voting Policies And Procedures without the
     prior approval of the Proxy Voting Oversight Group and its corporate
     parent, Pioneer Global Asset Management S.p.A

                                       5


   Proxy Voting Policies
   Pioneer's sole concern in voting proxies is the economic effect of the
   proposal on the value of portfolio holdings, considering both the short-
   and long-term impact. In many instances, Pioneer believes that supporting
   the company's strategy and voting "for" management's proposals builds
   portfolio value. In other cases, however, proposals set forth by management
   may have a negative effect on that value, while some shareholder proposals
   may hold the best prospects for enhancing it. Pioneer monitors developments
   in the proxy-voting arena and will revise this policy as needed.

   All proxies that are received promptly will be voted in accordance with the
   specific policies listed below. All shares in a company held by
   Pioneer-managed accounts will be voted alike, unless a client has given us
   specific voting instructions on an issue or has not delegated authority to
   us. Proxy voting issues will be reviewed by Pioneer's Proxy Voting
   Oversight Group, which consists of the Director of Portfolio Management US,
   the Director of Investment Operations (the Proxy Coordinator), and the
   Director of Compliance.

   Pioneer has established Proxy Voting Procedures for identifying and
   reviewing conflicts of interest that may arise in the voting of proxies.

   Clients may request, at any time, a report on proxy votes for securities
   held in their portfolios and Pioneer is happy to discuss our proxy votes
   with company management. Pioneer retains a proxy voting service to provide
   research on proxy issues and to process proxy votes.

Administrative
   While administrative items appear infrequently in U.S. issuer proxies, they
   are quite common in non-U.S. proxies.

   We will generally support these and similar management proposals:

       o    Corporate name change.

       o    A change of corporate headquarters.

       o    Stock exchange listing.

       o    Establishment of time and place of annual meeting.

       o    Adjournment or postponement of annual meeting.

       o    Acceptance/approval of financial statements.

       o    Approval of dividend payments, dividend reinvestment plans and other
            dividend-related proposals.

       o    Approval of minutes and other formalities.

                                       6


       o    Authorization of the transferring of reserves and allocation of
            income.

       o    Amendments to authorized signatories.

       o    Approval of accounting method changes or change in fiscal year-end.

       o    Acceptance of labor agreements.

       o    Appointment of internal auditors.

   Pioneer will vote on a case-by-case basis on other routine business;
   however, Pioneer will oppose any routine business proposal if insufficient
   information is presented in advance to allow Pioneer to judge the merit of
   the proposal. Pioneer has also instructed its proxy voting service to
   inform Pioneer of its analysis of any administrative items inconsistent, in
   its view, with supporting the value of Pioneer portfolio holdings so that
   Pioneer may consider and vote on those items on a case-by-case basis.

Auditors
     We normally vote for proposals to:

       o    Ratify the auditors. We will consider a vote against if we are
            concerned about the auditors' independence or their past work for
            the company. Specifically, we will oppose the ratification of
            auditors and withhold votes from audit committee members if
            non-audit fees paid by the company to the auditing firm exceed the
            sum of audit fees plus audit-related fees plus permissible tax
            fees according to the disclosure categories proposed by the
            Securities and Exchange Commission.

       o    Restore shareholder rights to ratify the auditors.

     We will normally oppose proposals that require companies to:

       o    Seek bids from other auditors.

       o    Rotate auditing firms, except where the rotation is statutorily
            required or where rotation would demonstrably strengthen financial
            disclosure.

       o    Indemnify auditors.

       o    Prohibit auditors from engaging in non-audit services for the
            company.

     Board of Directors
     On issues related to the board of directors, Pioneer normally supports
     management. We will, however, consider a vote against management in
     instances where corporate performance has been very poor or where the board
     appears to lack independence.

                                       7


     General Board Issues
     Pioneer will vote for:

       o    Audit, compensation and nominating committees composed of
            independent directors exclusively.

       o    Indemnification for directors for actions taken in good faith in
            accordance with the business judgment rule. We will vote against
            proposals for broader indemnification.

       o    Changes in board size that appear to have a legitimate business
            purpose and are not primarily for anti-takeover reasons.

       o    Election of an honorary director.

     We will vote against:

       o    Minimum stock ownership by directors.

       o    Term limits for directors. Companies benefit from experienced
            directors, and shareholder control is better achieved through
            annual votes.

       o    Requirements for union or special interest representation on the
            board.

       o    Requirements to provide two candidates for each board seat.

     We will vote on a case-by case basis on these issues:

       o    Separate chairman and CEO positions. We will consider voting with
            shareholders on these issues in cases of poor corporate
            performance.

     Elections of Directors
     In uncontested elections of directors we will vote against:

       o    Individual directors with absenteeism above 25% without valid
            reason. We support proposals that require disclosure of director
            attendance.

       o    Insider directors and affiliated outsiders who sit on the audit,
            compensation, stock option or nominating committees. For the
            purposes of our policy, we accept the definition of affiliated
            directors provided by our proxy voting service.

     We will also vote against:

       o    Directors who have failed to act on a takeover offer where the
            majority of shareholders have tendered their shares.

       o    Directors who appear to lack independence or are associated with
            very poor corporate performance.

                                       8


     We will vote on a case-by case basis on these issues:

       o    Re-election of directors who have implemented or renewed a
            dead-hand or modified dead-hand poison pill (a "dead-hand poison
            pill" is a shareholder rights plan that may be altered only by
            incumbent or "dead " directors. These plans prevent a potential
            acquirer from disabling a poison pill by obtaining control of the
            board through a proxy vote).

       o    Contested election of directors.

       o    Prior to phase-in required by SEC, we would consider supporting
            election of a majority of independent directors in cases of poor
            performance.

       o    Mandatory retirement policies.

       o    Directors who have ignored a shareholder proposal that has been
            approved by shareholders for two consecutive years.

     Takeover-Related Measures
     Pioneer is generally opposed to proposals that may discourage takeover
     attempts. We believe that the potential for a takeover helps ensure that
     corporate performance remains high.

     Pioneer will vote for:

       o    Cumulative voting.

       o    Increase ability for shareholders to call special meetings.

       o    Increase ability for shareholders to act by written consent.

       o    Restrictions on the ability to make greenmail payments.

       o    Submitting rights plans to shareholder vote.

       o    Rescinding shareholder rights plans ("poison pills").

       o    Opting out of the following state takeover statutes:

     o Control share acquisition statutes, which deny large holders voting
       rights on holdings over a specified threshold.

     o Control share cash-out provisions, which require large holders to
       acquire shares from other holders.

     o Freeze-out provisions, which impose a waiting period on large
       holders before they can attempt to gain control.

     o Stakeholder laws, which permit directors to consider interests of
       non-shareholder constituencies.

                                       9


     o Disgorgement provisions, which require acquirers to disgorge profits
       on purchases made before gaining control.

     o Fair price provisions.

     o Authorization of shareholder rights plans.

     o Labor protection provisions.

     o Mandatory classified boards.

     We will vote on a case-by-case basis on the following issues:

       o    Fair price provisions. We will vote against provisions requiring
            supermajority votes to approve takeovers. We will also consider
            voting against proposals that require a supermajority vote to
            repeal or amend the provision. Finally, we will consider the
            mechanism used to determine the fair price; we are generally
            opposed to complicated formulas or requirements to pay a premium.

       o    Opting out of state takeover statutes regarding fair price
            provisions. We will use the criteria used for fair price
            provisions in general to determine our vote on this issue.

       o    Proposals that allow shareholders to nominate directors.

     We will vote against:

       o    Classified boards, except in the case of closed-end mutual funds.

       o    Limiting shareholder ability to remove or appoint directors. We
            will support proposals to restore shareholder authority in this
            area. We will review on a case-by-case basis proposals that
            authorize the board to make interim appointments.

       o    Classes of shares with unequal voting rights.

       o    Supermajority vote requirements.

       o    Severance packages ("golden" and "tin" parachutes). We will support
            proposals to put these packages to shareholder vote.

       o    Reimbursement of dissident proxy solicitation expenses. While we
            ordinarily support measures that encourage takeover bids, we
            believe that management should have full control over corporate
            funds.

       o    Extension of advance notice requirements for shareholder proposals.

       o    Granting board authority normally retained by shareholders (e.g.,
            amend charter, set board size).

       o    Shareholder rights plans ("poison pills"). These plans generally
            allow shareholders to buy additional shares at a below-market
            price in the event of a change in control and may deter some bids.

                                       10


     Capital Structure
     Managements need considerable flexibility in determining the company's
     financial structure, and Pioneer normally supports managements' proposals
     in this area. We will, however, reject proposals that impose high barriers
     to potential takeovers.

     Pioneer will vote for:

       o    Changes in par value.

       o    Reverse splits, if accompanied by a reduction in number of shares.

       o    Share repurchase programs, if all shareholders may participate on
            equal terms.

       o    Bond issuance.

       o    Increases in "ordinary" preferred stock.

       o    Proposals to have blank-check common stock placements (other than
            shares issued in the normal course of business) submitted for
            shareholder approval.

       o    Cancellation of company treasury shares.

     We will vote on a case-by-case basis on the following issues:

       o    Reverse splits not accompanied by a reduction in number of shares,
            considering the risk of delisting.

       o    Increase in authorized common stock. We will make a determination
            considering, among other factors:

     o Number of shares currently available for issuance;

     o Size of requested increase (we would normally approve increases of up to
       100% of current authorization);

     o Proposed use of the additional shares; and

     o Potential consequences of a failure to increase the number of shares
       outstanding (e.g., delisting or bankruptcy).

       o    Blank-check preferred. We will normally oppose issuance of a new
            class of blank-check preferred, but may approve an increase in a
            class already outstanding if the company has demonstrated that it
            uses this flexibility appropriately.

       o    Proposals to submit private placements to shareholder vote.

       o    Other financing plans.

     We will vote against preemptive rights that we believe limit a company's
financing flexibility.

                                      11


     Compensation
     Pioneer supports compensation plans that link pay to shareholder returns
     and believes that management has the best understanding of the level of
     compensation needed to attract and retain qualified people. At the same
     time, stock-related compensation plans have a significant economic impact
     and a direct effect on the balance sheet. Therefore, while we do not want
     to micromanage a company's compensation programs, we will place limits on
     the potential dilution these plans may impose.

     Pioneer will vote for:

       o    401(k) benefit plans.

       o    Employee stock ownership plans (ESOPs), as long as shares
            allocated to ESOPs are less than 5% of outstanding shares. Larger
            blocks of stock in ESOPs can serve as a takeover defense. We will
            support proposals to submit ESOPs to shareholder vote.

       o    Various issues related to the Omnibus Budget and Reconciliation Act
            of 1993 (OBRA), including:

     o Amendments to performance plans to conform with OBRA;

     o Caps on annual grants or amendments of administrative features;

     o Adding performance goals; and

     o Cash or cash-and-stock bonus plans.

       o    Establish a process to link pay, including stock-option grants, to
            performance, leaving specifics of implementation to the company.

       o    Require that option repricings be submitted to shareholders.

       o    Require the expensing of stock-option awards.

       o    Require reporting of executive retirement benefits (deferred
            compensation, split-dollar life insurance, SERPs, and pension
            benefits).

       o    Employee stock purchase plans where the purchase price is equal to
            at least 85% of the market price, where the offering period is no
            greater than 27 months and where potential dilution (as defined
            below) is no greater than 10%.

                                       12


     We will vote on a case-by-case basis on the following issues:

       o    Executive and director stock-related compensation plans. We will
            consider the following factors when reviewing these plans:

       o    The program must be of a reasonable size. We will approve plans
            where the combined employee and director plans together would
            generate less than 15% dilution. We will reject plans with 15% or
            more potential dilution.

            Dilution = (A + B + C) / (A + B + C + D), where

            A = Shares reserved for plan/amendment,

            B = Shares available under continuing plans,

            C = Shares granted but unexercised and

            D = Shares outstanding.

       o    The plan must not:

            o   Explicitly permit unlimited option repricing authority or that
                have repriced in the past without shareholder approval.

            o   Be a self-replenishing "evergreen" plan, plans that grant
                discount options and tax offset payments.

     o We are generally in favor of proposals that increase participation beyond
       executives.

     o We generally support proposals asking companies to adopt rigorous
       vesting provisions for stock option plans such as those that vest
       incrementally over, at least, a three- or four-year period with a pro
       rata portion of the shares becoming exercisable on an annual basis
       following grant date.

     o We generally support proposals asking companies to disclose their
       window period policies for stock transactions. Window period policies
       ensure that employees do not exercise options based on insider
       information contemporaneous with quarterly earnings releases and other
       material corporate announcements.

     o We generally support proposals asking companies to adopt stock holding
       periods for their executives.

       o    All other employee stock purchase plans.

       o    All other compensation-related proposals, including deferred
            compensation plans, employment agreements, loan guarantee programs
            and retirement plans.

       o    All other proposals regarding stock compensation plans, including
            extending the life of a plan, changing vesting restrictions,
            repricing options, lengthening exercise periods or accelerating
            distribution of awards and pyramiding and cashless exercise
            programs.

                                       13


     We will vote against:

       o    Pensions for non-employee directors. We believe these retirement
            plans reduce director objectivity.

       o    Elimination of stock option plans.

     We will vote on a case-by case basis on these issues:

       o    Limits on executive and director pay.

       o    Stock in lieu of cash compensation for directors.

     Corporate Governance
     Pioneer will vote for:

       o    Confidential Voting.

       o    Equal access provisions, which allow shareholders to contribute
            their opinion to proxy materials.

       o    Proposals requiring directors to disclose their ownership of shares
            in the company.

     We will vote on a case-by-case basis on the following issues:

       o    Change in the state of incorporation. We will support
            reincorporations supported by valid business reasons. We will
            oppose those that appear to be solely for the purpose of
            strengthening takeover defenses.

       o    Bundled proposals. We will evaluate the overall impact of the
            proposal.

       o    Adopting or amending the charter, bylaws or articles of association.

       o    Shareholder appraisal rights, which allow shareholders to demand
            judicial review of an acquisition price.

     We will vote against:

       o    Shareholder advisory committees. While management should solicit
            shareholder input, we prefer to leave the method of doing so to
            management's discretion.

       o    Limitations on stock ownership or voting rights.

       o    Reduction in share ownership disclosure guidelines.

                                       14


     Mergers and Restructurings
     Pioneer will vote on the following and similar issues on a case-by-case
     basis:

       o    Mergers and acquisitions.

       o    Corporate restructurings, including spin-offs, liquidations, asset
            sales, joint ventures, conversions to holding company and
            conversions to self-managed REIT structure.

       o    Debt restructurings.

       o    Conversion of securities.

       o    Issuance of shares to facilitate a merger.

       o    Private placements, warrants, convertible debentures.

       o    Proposals requiring management to inform shareholders of merger
            opportunities.

     We will normally vote against shareholder proposals requiring that the
     company be put up for sale.

     Mutual Funds
     Many of our portfolios may invest in shares of closed-end mutual funds or
     exchange-traded funds. The non-corporate structure of these investments
     raises several unique proxy voting issues.

     Pioneer will vote for:

       o    Establishment of new classes or series of shares.

       o    Establishment of a master-feeder structure.

     Pioneer will vote on a case-by-case on:

       o    Changes in investment policy. We will normally support changes
            that do not affect the investment objective or overall risk level
            of the fund. We will examine more fundamental changes on a
            case-by-case basis.

       o    Approval of new or amended advisory contracts.

       o    Changes from closed-end to open-end format.

       o    Authorization for, or increase in, preferred shares.

       o    Disposition of assets, termination, liquidation, or mergers.

       o    Classified boards of closed-end mutual funds, but will typically
            support such proposals.

                                       15


     Social Issues
     Pioneer will abstain on stockholder proposals calling for greater
     disclosure of corporate activities with regard to social issues. "Social
     Issues" may generally be described as shareholder proposals for a company
     to:

       o    Conduct studies regarding certain issues of public concern and
            interest;

       o    Study the feasibility of the company taking certain actions with
            regard to such issues; or

       o    Take specific action, including ceasing certain behavior and
            adopting company standards and principles, in relation to issues
            of public concern and interest.

     We believe these issues are important and should receive management
     attention.

     Pioneer will vote against proposals calling for substantial changes in the
     company's business or activities. We will also normally vote against
     proposals with regard to contributions, believing that management should
     control the routine disbursement of funds.

                                       16





ITEM 8. PORTFOLIO MANAGERS OF CLOSED-END MANAGEMENT INVESTMENT COMPANIES.

(a) If the registrant is a closed-end management investment company that
is filing an annual report on this Form N-CSR,provide the following
information:
(1) State the name, title, and length of service of the person or persons
employed by or associated with the registrant or an investment adviser
of the registrant who are primarily responsible for the day-to-day management
of the registrant's portfolio ("Portfolio Manager"). Also state each Portfolio
Manager's business experience during the past 5 years.



ADDITIONAL INFORMATION ABOUT THE PORTFOLIO MANAGER

OTHER ACCOUNTS MANAGED BY THE PORTFOLIO MANAGER
The table below indicates, for the portfolio manager of the fund, information
about the accounts other than the fund over which the portfolio manager has
day-to-day investment responsibility. All information on the number of accounts
and total assets in the table is as of April 30, 2018. For purposes of the
table, "Other Pooled Investment Vehicles" may include investment partnerships,
undertakings for collective investments in transferable securities ("UCITS")
and other non-U.S. investment funds and group trusts, and "Other Accounts" may
include separate accounts for institutions or individuals, insurance company
general or separate accounts, pension funds and other similar institutional
accounts but generally do not include the portfolio manager's personal
investment accounts or those which the manager may be deemed to own
beneficially under the code of ethics. Certain funds and other accounts managed
by the portfolio manager may have substantially similar investment strategies.




                                                                                               NUMBER OF          ASSETS
                                                                                                ACCOUNTS         MANAGED
                                                                                             MANAGED FOR       FOR WHICH
                                                                                          WHICH ADVISORY        ADVISORY
                                                          NUMBER OF                               FEE IS          FEE IS
NAME OF                                                    ACCOUNTS       TOTAL ASSETS      PERFORMANCE-    PERFORMANCE-
PORTFOLIO MANAGER    TYPE OF ACCOUNT                        MANAGED    MANAGED (000'S)             BASED   BASED (000'S)
-------------------  ---------------------------------- -----------  -----------------  ----------------  --------------
                                                                                           
David Eurkus         Other Registered Investment
                     Companies                                  3    $2,231,718                      N/A             N/A
                     Other Pooled Investment Vehicles           0    $        0                      N/A             N/A
                     Other Accounts                             0    $        0                      N/A             N/A
-------------------  ---------------------------------- -----------  ----------         ----------------  --------------
Jonathan Chirunga    Other Registered
                     Investment Companies                       3    $2,231,718                      N/A             N/A
                     Other Pooled Investment Vehicles           0    $        0                      N/A             N/A
                     Other Accounts                             0    $        0                      N/A             N/A
-------------------  ---------------------------------- -----------  ----------         ----------------  --------------


POTENTIAL CONFLICTS OF INTEREST
When a portfolio manager is responsible for the management of more than one
account, the potential arises for the portfolio manager to favor one account
over another. The principal types of potential conflicts of interest that may
arise are discussed below. For the reasons outlined below, Amundi Pioneer does
not believe that any material conflicts are likely to arise out of a portfolio
manager's responsibility for the management of the fund as well as one or more
other accounts. Although Amundi Pioneer has adopted procedures that it believes
are reasonably designed to detect and prevent violations of the federal
securities laws and to mitigate the potential for conflicts of interest to
affect its portfolio management decisions, there can be no assurance that all
conflicts will be identified or that all procedures will be effective in
mitigating the potential for such risks. Generally, the risks of such conflicts
of interest are increased to the extent that a portfolio manager has a
financial incentive to favor one account over another. Amundi Pioneer has
structured its compensation arrangements in a manner that is intended to limit
such potential for conflicts of interest. See "Compensation of Portfolio
Managers" below.

o A portfolio manager could favor one account over another in allocating new
  investment opportunities that have limited supply, such as initial public
  offerings and private placements. If, for example, an initial public
  offering that was expected to appreciate in value significantly shortly
  after the offering was allocated to a single account, that account may be
  expected to have better investment performance than other accounts that did
  not receive an allocation of the initial public offering. Generally,
  investments for which there is limited availability are allocated based upon
  a range of factors including available cash and


                                       0


 consistency with the accounts' investment objectives and policies. This
 allocation methodology necessarily involves some subjective elements but is
 intended over time to treat each client in an equitable and fair manner.
 Generally, the investment opportunity is allocated among participating
 accounts on a pro rata basis. Although Amundi Pioneer believes that its
 practices are reasonably designed to treat each client in an equitable and
 fair manner, there may be instances where a fund may not participate, or may
 participate to a lesser degree than other clients, in the allocation of an
 investment opportunity.

o A portfolio manager could favor one account over another in the order in
  which trades for the accounts are placed. If a portfolio manager determines
  to purchase a security for more than one account in an aggregate amount that
  may influence the market price of the security, accounts that purchased or
  sold the security first may receive a more favorable price than accounts
  that made subsequent transactions. The less liquid the market for the
  security or the greater the percentage that the proposed aggregate purchases
  or sales represent of average daily trading volume, the greater the
  potential for accounts that make subsequent purchases or sales to receive a
  less favorable price. When a portfolio manager intends to trade the same
  security on the same day for more than one account, the trades typically are
  "bunched," which means that the trades for the individual accounts are
  aggregated and each account receives the same price. There are some types of
  accounts as to which bunching may not be possible for contractual reasons
  (such as directed brokerage arrangements). Circumstances may also arise
  where the trader believes that bunching the orders may not result in the
  best possible price. Where those accounts or circumstances are involved,
  Amundi Pioneer will place the order in a manner intended to result in as
  favorable a price as possible for such client.

o A portfolio manager could favor an account if the portfolio manager's
  compensation is tied to the performance of that account to a greater degree
  than other accounts managed by the portfolio manager. If, for example, the
  portfolio manager receives a bonus based upon the performance of certain
  accounts relative to a benchmark while other accounts are disregarded for
  this purpose, the portfolio manager will have a financial incentive to seek
  to have the accounts that determine the portfolio manager's bonus achieve
  the best possible performance to the possible detriment of other accounts.
  Similarly, if Amundi Pioneer receives a performance-based advisory fee, the
  portfolio manager may favor that account, whether or not the performance of
  that account directly determines the portfolio manager's compensation.

o A portfolio manager could favor an account if the portfolio manager has a
  beneficial interest in the account, in order to benefit a large client or to
  compensate a client that had poor returns. For example, if the portfolio
  manager held an interest in an investment partnership that was one of the
  accounts managed by the portfolio manager, the portfolio manager would have
  an economic incentive to favor the account in which the portfolio manager
  held an interest.

o If the different accounts have materially and potentially conflicting
  investment objectives or strategies, a conflict of interest could arise. For
  example, if a portfolio manager purchases a security for one account and
  sells the same security for another account, such trading pattern may
  disadvantage either the account that is long or short. In making portfolio
  manager assignments, Amundi Pioneer seeks to avoid such potentially
  conflicting situations. However, where a portfolio manager is responsible
  for accounts with differing investment objectives and policies, it is
  possible that the portfolio manager will conclude that it is in the best
  interest of one account to sell a portfolio security while another account
  continues to hold or increase the holding in such security.


COMPENSATION OF PORTFOLIO MANAGER
Amundi Pioneer has adopted a system of compensation for portfolio managers that
seeks to align the financial interests of the portfolio managers with those of
shareholders of the accounts (including Pioneer funds) the portfolio managers
manage, as well as with the financial performance of Amundi Pioneer. The
compensation program for all Amundi Pioneer portfolio managers includes a base
salary (determined by the rank and tenure of the employee) and an annual bonus
program, as well as customary benefits that are offered generally to all
full-time employees. Base compensation is fixed and normally reevaluated on an
annual basis. Amundi Pioneer seeks to set base compensation at market rates,
taking into account the


                                       1


experience and responsibilities of the portfolio manager. The bonus plan is
intended to provide a competitive level of annual bonus compensation that is
tied to the portfolio manager achieving superior investment performance and
align the interests of the investment professional with those of shareholders,
as well as with the financial performance of Amundi Pioneer. Any bonus under
the plan is completely discretionary, with a maximum annual bonus that may be
in excess of base salary. The annual bonus is based upon a combination of the
following factors:

o QUANTITATIVE INVESTMENT PERFORMANCE. The quantitative investment performance
  calculation is based on pre-tax investment performance of all of the
  accounts managed by the portfolio manager (which includes the fund and any
  other accounts managed by the portfolio manager) over a one-year period (20%
  weighting) and four-year period (80% weighting), measured for periods ending
  on December 31. The accounts, which include the fund, are ranked against a
  group of mutual funds with similar investment objectives and investment
  focus (60%) and a broad-based securities market index measuring the
  performance of the same type of securities in which the accounts invest
  (40%), which, in the case of the fund, is the Barclays Capital Municipal
  Bond Index and Barclays Capital High Yield Municipal Bond Index. As a result
  of these two benchmarks, the performance of the portfolio manager for
  compensation purposes is measured against the criteria that are relevant to
  the portfolio manager's competitive universe.

o QUALITATIVE PERFORMANCE. The qualitative performance component with respect
  to all of the accounts managed by the portfolio manager includes objectives,
  such as effectiveness in the areas of teamwork, leadership, communications
  and marketing, that are mutually established and evaluated by each portfolio
  manager and management.

o AMUNDI PIONEER RESULTS AND BUSINESS LINE RESULTS. Amundi Pioneer's financial
  performance, as well as the investment performance of its investment
  management group, affect a portfolio manager's actual bonus by a leverage
  factor of plus or minus (+/-) a predetermined percentage.

The quantitative and qualitative performance components comprise 80% and 20%,
respectively, of the overall bonus calculation (on a pre-adjustment basis). A
portion of the annual bonus is deferred for a specified period and may be
invested in one or more Pioneer funds.

Certain portfolio managers participate in other programs designed to reward and
retain key contributors. Portfolio managers also may participate in a deferred
compensation program, whereby deferred amounts are invested in one or more
Pioneer funds.


SHARE OWNERSHIP BY PORTFOLIO MANAGERS
The following table indicates as of April 30, 2018 the value, within the
indicated range, of shares beneficially owned by the portfolio managers of the
fund.




                             BENEFICIAL OWNERSHIP
NAME OF PORTFOLIO MANAGER    OF THE FUND*
---------------------------  ---------------------
                          
David Eurkus                 A
---------------------------  ---------------------
Jonathan Chirunga            A
---------------------------  ---------------------


*     Key to Dollar Ranges


  
A.   None
B.   $1 - $10,000
C.   $10,001 - $50,000
D.   $50,001 - $100,000
E.   $100,001 - $500,000
F.   $500,001 - $1,000,000
G.   Over $1,000,000



                                       2



ITEM 9. PURCHASES OF EQUITY SECURITIES BY CLOSED-END MANAGEMENT
INVESTMENT COMPANY AND AFFILIATED PURCHASERS.

(a) If the registrant is a closed-end management investment company,
in the following tabular format, provide the information specified in
paragraph (b) of this Item with respect to any purchase made by or on
behalf of the registrant or any affiliated purchaser, as defined in
Rule 10b-18(a)(3) under the Exchange Act (17 CFR 240.10b-18(a)(3)), of
shares or other units of any class of the registrant's equity securities
that is registered by the registrant pursuant to Section 12 of the
Exchange Act (15 U.S.C. 781).

During the period covered by this report, there were no purchases
made by or on behalf of the registrant or any affiliated purchaser
as defined in Rule 10b-18(a)(3) under the Securities Exchange Act
of 1934 (the Exchange Act), of shares of the registrants equity
securities that are registered by the registrant pursuant to
Section 12 of the Exchange Act.



ITEM 10. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS.

Describe any material changes to the procedures by which shareholders
may recommend nominees to the registrant's board of directors, where
those changes were implemented after the registrant last provided
disclosure in response to the requirements of Item 407(c)(2)(iv) of
Regulation S-R(17 CFR 229.407)(as required by Item 22(b)(15))
of Schedule 14A (17 CFR 240.14a-101), or this Item.


There have been no material changes to the procedures by which the
shareholders may recommend nominees to the registrant's board of
directors since the registrant last provided disclosure in response
to the requirements of Item 407(c)(2)(iv) of Regulation S-R of Schedule 14(A)
in its definitive proxy statement, or this item.


ITEM 11. CONTROLS AND PROCEDURES.

(a) Disclose the conclusions of the registrant's principal executive and
principal financials officers, or persons performing similar functions,
regarding the effectiveness of the registrant's disclosure
controls and procedures (as defined in Rule 30a-3(c) under the Act (17 CFR
270.30a-3(c))) as of a date within 90 days of the filing date of the report
that includes the disclosure required by this paragraph,
based on the evaluation of these controls and procedures required by Rule
30a-3(b) under the Act (17 CFR 270.30(a)-3(b) and Rules 13a-15(b) or 15d-15(b)
under the Exchange Act (17 CFR 240.13a-15(b) or 240.15d-15(b)).

The registrant's principal executive officer
and principal financial officer have
concluded that the registrant's disclosure
controls and procedures are effective based
on the evaluation of these controls and
procedures as of a date within 90 days of the
filing date of this report.


(b) Disclose any change in the registrant's internal control over financial
reporting (as defined in Rule 30a-3(d) under the Act (17CFR 270.30a-3(d)) that
occured during the second fiscal quarter of the period covered by this report
that has materially affected, or is reasonably likely to materially affect,
the registrant's internal control over financial reporting.

There were no significant changes in the
registrant's internal control over financial
reporting that occurred during the second
fiscal quarter of the period covered by this
report that have materially affected, or are
reasonably likely to materially affect, the
registrant's internal control over financial
reporting.

The registrant's principal executive officer and principal financial
officer, however, voluntarily are reporting the following information:

In August of 2006 the registrant's investment adviser
enhanced its internal procedures for reporting performance
information required to be included in prospectuses.
Those enhancements involved additional internal controls
over the appropriateness of performance data
generated for this purpose.  Such enhancements were made
following an internal review which identified
prospectuses relating to certain classes of shares of
a limited number of registrants where, inadvertently,
performance information not reflecting the deduction of
applicable sales charges was included. Those prospectuses
were revised, and the revised prospectuses were distributed to
shareholders.

Item 12. Disclosure of Securities Lending Activities for Closed-End
Management Investment Companies.

(a) If the registrant is a closed-end management investment company,
provide the following dollar amounts of income and compensation related
to the securities lending activities of the registrant during its most
recent fiscal year:

N/A

(1) Gross income from securities lending activities;

N/A

(2) All fees and/or compensation for each of the following securities
lending activities and related services: any share of revenue generated
by the securities lending program paid to the securities lending agent(s)
(revenue split); fees paid for cash collateral management services
(including fees deducted from a pooled cash collateral reinvestment
vehicle) that are not included in the revenue split; administrative
fees that are not included in the revenue split; fees for
indemnification that are not included in the revenue split; rebates
paid to borrowers; and any other fees relating to the securities lending
program that are not included in the revenue split, including a description
of those other fees;

N/A

(3) The aggregate fees/compensation disclosed pursuant to paragraph (2); and

N/A

(4) Net income from securities lending activities (i.e., the dollar amount in
paragraph (1) minus the dollar amount in paragraph (3)).

If a fee for a service is included in the revenue split, state that the fee
is included in the revenue split.

N/A

(b) If the registrant is a closed-end management investment company, describe
the services provided to the registrant by the securities lending agent in
the registrants most recent fiscal year.

N/A


ITEM 13. EXHIBITS.

(a) File the exhibits listed below as part of this Form. Letter or number the
exhibits in the sequence indicated.

(1) Any code of ethics, or amendment thereto, that is the subject of the
disclosure required by Item 2, to the extent that the registrant intends to
satisfy the Item 2 requirements through filing of an exhibit.



(2) A separate certification for each principal executive officer and principal
financial officer of the registrant as required by Rule 30a-2(a) under the Act
(17 CFR 270.30a-2(a)) , exactly as set forth below:

Filed herewith.





                                   SIGNATURES

                          [See General Instruction F]


Pursuant to the requirements of the Securities Exchange Act of 1934 and the
Investment Company Act of 1940, the registrant has duly caused this report to be
signed on its behalf by the undersigned, thereunto duly authorized.


(Registrant) Pioneer Municipal High Income Trust


By (Signature and Title)* /s/ Lisa M. Jones
Lisa M. Jones, President & Chief Executive Officer

Date June 28, 2018


Pursuant to the requirements of the Securities Exchange Act of 1934 and the
Investment Company Act of 1940, this report has been signed below by the
following persons on behalf of the registrant and in the capacities and on the
dates indicated.


By (Signature and Title)* /s/ Lisa M. Jones
Lisa M. Jones, President & Chief Executive Officer

Date June 28, 2018


By (Signature and Title)* /s/ Mark E. Bradley
Mark E. Bradley, Treasurer & Chief Accounting & Financial Officer

Date June 28, 2018

* Print the name and title of each signing officer under his or her signature.