PIONEER INTERMEDIATE TAX FREE FUND
N-30D, 1998-02-23
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                                                           Pioneer [LOGO]

Pioneer
Intermediate Tax-Free
Fund

- ------------------------------
ANNUAL REPORT 12/31/97
- ------------------------------
<PAGE>

Table of Contents
- --------------------------------------------------------------------------------

Letter from the Chairman                                                       1

Portfolio Summary                                                              2

Performance Update                                                             3

Portfolio Management Discussion                                                6

Schedule of Investments                                                        9

Financial Statements                                                          16

Notes to Financial Statements                                                 22

Report of Independent Public Accountants                                      26

Trustees, Officers and Service Providers                                      27

Programs and Services for Pioneer Shareowners                                 28
<PAGE>

Pioneer Intermediate Tax-Free Fund

- --------------------------------------------------------------------------------
LETTER FROM THE CHAIRMAN 12/31/97
- --------------------------------------------------------------------------------

Dear Shareowner,
- --------------------------------------------------------------------------------

I am pleased to present this report for Pioneer Intermediate Tax-Free Fund,
covering its fiscal year ended December 31, 1997. On behalf of the Fund's
investment team, I thank you for your interest and this opportunity to comment
briefly on today's investing environment.

Since October, investors have shown increasing demand for U.S. bonds, as the
world's stock markets have been exceptionally volatile. Asian markets plunged in
the face of severe instability in currencies and economic growth. Here in the
United States, the Dow Jones Industrial Average experienced - in the space of
two days - both its biggest one-day point drop and its biggest one-day point
gain. Although it recovered, its pace has since been unsteady. European markets
bounced around, shaken by the drop in Asia and then heartened by the speedy U.S.
rebound. Even Latin American markets were affected, mostly in a chain reaction
from nervous investors.

After consecutive quarters of robust growth in stocks, this fast-paced change
forced individuals and institutions to rethink their investment strategy. Money
has poured into the bond market, with demand spilling over into tax-free
markets. These positive conditions are driving prices up and yields down. Many
investors have moved away from stocks and into high-quality, U.S. fixed-income
securities - like those held by your Fund - to shelter their portfolio. We have
always believed it is important to allocate assets among both stocks and bonds,
and recent market conditions demonstrate this importance.

I encourage you to read on to learn more about your Fund. Please contact your
investment representative, or us at 1-800-225-6292, if you have questions about
Pioneer Intermediate Tax-Free Fund.

Respectfully,


/s/ John F. Cogan, Jr.

John F. Cogan, Jr.,
Chairman and President


                                                                               1
<PAGE>

Pioneer Intermediate Tax-Free Fund

- --------------------------------------------------------------------------------
PORTFOLIO SUMMARY 12/31/97
- --------------------------------------------------------------------------------

Portfolio Quality
- --------------------------------------------------------------------------------
(As a percentage of total investment portfolio)

[The following table was a pie chart in the printed materials.]

AAA                             36%
AA                              46%
A                               16%
Short-Term Cash Equivalents      2%

Portfolio Maturity
- --------------------------------------------------------------------------------
(Effective life as a percentage of total investment portfolio)

[The following table was a pie chart in the printed materials.]

0-2 Years        8%
2-5 Years        9%
5-7 Years       14%
7-10 Years      32%
10-15 Years     31%
15+ Years        6%

10 Largest Holdings
- --------------------------------------------------------------------------------
(As a percentage of long-term holdings)
- --------------------------------------------------------------------------------
 1. Pennsylvania State General Obligation, 6.25%, 2010               2.57%
- --------------------------------------------------------------------------------
 2. Kansas State Department of Transportation Highway               
      Revenue, 6.125%, 2009                                          2.55
- --------------------------------------------------------------------------------
 3. Indiana Municipal Power Agency, Power Supply System             
      Revenue, 6.0%, 2012                                            2.51
- --------------------------------------------------------------------------------
 4. Connecticut State Special Tax Obligation Revenue, 6.0%, 2006     2.50
- --------------------------------------------------------------------------------
 5. Grand River Dam Authority Electric Revenue, 5.75%, 2006          2.44
- --------------------------------------------------------------------------------
 6. Texas State General Obligation, 5.8%, 2004                       2.44
- --------------------------------------------------------------------------------
 7. Georgia State General Obligation, 5.5%, 2006                     2.42
- --------------------------------------------------------------------------------
 8. Maine State General Obligation, 5.375%, 2006                     2.40
- --------------------------------------------------------------------------------
 9. University of Maryland System Auxiliary Facility and Tuition    
      Revenue, 5.4%, 2006                                            2.39
- --------------------------------------------------------------------------------
10. Maryland Community Development Administration Single Family    
      Mortgage Revenue, 5.95%, 2006                                  2.33

Fund holdings will vary for other periods.


2
<PAGE>

Pioneer Intermediate Tax-Free Fund

- --------------------------------------------------------------------------------
PERFORMANCE UPDATE 12/31/97                                       CLASS A SHARES
- --------------------------------------------------------------------------------

Share Prices and Distributions
- --------------------------------------------------------------------------------

Net Asset Value
per Share           12/31/97    12/31/96
                    $10.45      $10.28

Distributions per Share       Income      Short-Term       Long-Term
(12/31/96 - 12/31/97)         Dividends   Capital Gains    Capital Gains
                              $0.435      $0.0019          $0.0809

Investment Returns
- --------------------------------------------------------------------------------

The mountain chart on the right shows the growth of a $10,000 investment made in
Pioneer Intermediate Tax-Free Fund at public offering price, compared to the
growth of the Lehman Brothers Municipal Bond Index.

[The following table was a mountain chart in the printed materials.]

Growth of $10,000

                            Pioneer Intermediate       Lehman Brothers
                            Tax-Free Fund*             Municipal Bond
                                                         Index
- --------------------------------------------------------------------------------

12/31/87                     9,650                     10,000
                            10,889                     11,016
12/31/89                    11,953                     12,205
                            12,721                     13,094
12/31/91                    14,141                     14,684
                            15,364                     15,979
12/31/93                    17,067                     17,942
                            16,039                     17,014
12/31/95                    18,253                     19,984
                            18,806                     20,869
12/31/97                    20,099                     22,787

- -------------------------------------------------
[boxed text]

Average Annual Total Returns
(As of December 31, 1997)

            Net Asset    Public Offering
Period        Value           Price*
10 Years      7.61%            7.23%
5 Years       5.52             4.78
1 Year        6.87             3.16
- -------------------------------------------------

*     Reflects deduction of the maximum 3.5% sales charge at the beginning of
      the period and assumes reinvestment of distributions at net asset value.

The Lehman Brothers Municipal Bond Index is an unmanaged measure of
approximately 15,000 municipal bonds. Bonds in the Index have a minimum credit
rating of BBB, were part of at least a $50 million issuance made within the past
five years and have a maturity of at least two years. Index returns are
calculated monthly, assume reinvestment of dividends and, unlike Fund returns,
do not reflect any fees, expenses or sales charges. You cannot invest directly
in the Index.

Past performance does not guarantee future results. Return and share price
fluctuate, and your shares, when redeemed, may be worth more or less than their
original cost.


                                                                               3
<PAGE>

Pioneer Intermediate Tax-Free Fund

- --------------------------------------------------------------------------------
PERFORMANCE UPDATE 12/31/97                                       CLASS B SHARES
- --------------------------------------------------------------------------------

Share Prices and Distributions
- --------------------------------------------------------------------------------


Net Asset Value
per Share           12/31/97    12/31/96
                    $10.47      $10.31

Distributions per Share       Income      Short-Term       Long-Term
(12/31/96 - 12/31/97)         Dividends   Capital Gains    Capital Gains
                              $0.370      $0.0019          $0.0809

Investment Returns
- --------------------------------------------------------------------------------

The mountain chart on the right shows the growth of a $10,000 investment made
in Pioneer Intermediate Tax-Free Fund, compared to the growth of the Lehman
Brothers Municipal Bond Index.

[The following table was a mountain chart in the printed materials.]

Growth of $10,000

                            Pioneer Intermediate       Lehman Brothers
                            Tax-Free Fund*             Municipal Bond
                                                           Index
- --------------------------------------------------------------------------------

 4/30/94                    10,000                     10,000
 6/30/94                    10,038                     10,025
                            10,046                     10,094
12/31/94                     9,851                      9,949
                            10,420                     10,653
 6/30/95                    10,636                     10,909
                            10,832                     11,223
12/31/95                    11,102                     11,686
                            10,980                     11,545
 6/30/96                    10,976                     11,634
                            11,133                     11,900
12/31/95                    11,351                     12,204
                            11,255                     12,174
 6/30/97                    11,537                     12,594
                            11,799                     12,973
12/31/97                    11,942                     13,325

- -------------------------------------------------
[boxed text]

Average Annual Total Returns
(As of December 31, 1997)

                   If            If
Period            Held         Redeemed*

Life-of-Fund      5.18%          4.94%
(4/29/94)

1 Year            6.08           3.08

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

*     Reflects deduction of the maximum appli cable contingent deferred sales
      charge (CDSC) at the end of the period and assumes rein vestment of
      distributions. The maximum CDSC of 3% declines over four years.

The Lehman Brothers Municipal Bond Index is an unmanaged measure of
approximately 15,000 municipal bonds. Bonds in the Index have a minimum credit
rating of BBB, were part of at least a $50 million issuance made within the past
five years and have a maturity of at least two years. Index returns are
calculated monthly, assume reinvestment of dividends and, unlike Fund returns,
do not reflect any fees, expenses or sales charges. You cannot invest directly
in the Index.

Past performance does not guarantee future results. Return and share price
fluctuate, and your shares, when redeemed, may be worth more or less than their
original cost.


4
<PAGE>

Pioneer Intermediate Tax-Free Fund

- --------------------------------------------------------------------------------
PERFORMANCE UPDATE 12/31/97                                       CLASS C SHARES
- --------------------------------------------------------------------------------

Share Prices and Distributions
- --------------------------------------------------------------------------------

Net Asset Value
per Share           12/31/97    12/31/96
                    $10.48      $10.29

Distributions per Share       Income      Short-Term       Long-Term
(12/31/96 - 12/31/97)         Dividends   Capital Gains    Capital Gains
                              $0.336      $0.0019          $0.0809

Investment Returns
- --------------------------------------------------------------------------------

The mountain chart on the right shows the growth of a $10,000 investment made
in Pioneer Intermediate Tax-Free Fund, compared to the growth of the Lehman
Brothers Municipal Bond Index.

[The following table was a mountain chart in the printed materials.]

Growth of $10,000

                            Pioneer Intermediate       Lehman Brothers
                            Tax-Free Fund*             Municipal Bond
                                                           Index
- --------------------------------------------------------------------------------

 1/31/96                    10,000                     10,000
                             9,964                      9,932
 3/31/96                     9,813                      9,806
                             9,786                      9,778
                             9,759                      9,774
 6/30/96                     9,809                      9,881
                             9,889                      9,970
                             9,872                      9,968
 9/30/96                     9,930                     10,107
                            10,026                     10,221
                            10,172                     10,408
12/31/96                    10,122                     10,365
                            10,130                     10,384
                            10,187                     10,480
 3/31/97                    10,037                     10,340
                            10,074                     10,426
                            10,202                     10,583
 6/30/97                    10,289                     10,696
                            10,547                     10,992
                            10,405                     10,889
 9/30/97                    10,524                     11,018
                            10,552                     11,089
                            10,580                     11,155
12/31/97                    10,734                     11,317

- -------------------------------------------------
[boxed text]

Average Annual Total Returns
(As of December 31, 1997)

                   If                If
Period            Held            Redeemed*

Life-of-Fund      3.75%             3.75%
(1/31/96)

1 Year            6.04              6.04

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

*     Assumes reinvestment of distributions. The 1% contingent deferred sales
      charge (CDSC) applies to redemptions made within one year of purchase.

The Lehman Brothers Municipal Bond Index is an unmanaged measure of
approximately 15,000 municipal bonds. Bonds in the Index have a minimum credit
rating of BBB, were part of at least a $50 million issuance made within the past
five years and have a maturity of at least two years. Index returns are
calculated monthly, assume reinvestment of dividends and, unlike Fund returns,
do not reflect any fees, expenses or sales charges. You cannot invest directly
in the Index.

Past performance does not guarantee future results. Return and share price
fluctuate, and your shares, when redeemed, may be worth more or less than their
original cost.


                                                                               5
<PAGE>

Pioneer Intermediate Tax-Free Fund

- --------------------------------------------------------------------------------
PORTFOLIO MANAGEMENT DISCUSSION 12/31/97
- --------------------------------------------------------------------------------

Pioneer Intermediate Tax-Free Fund's fiscal year came to a close on December 31,
1997. We saw a variety of conditions in the bond market in 1997. Interest rates
rose early on then moved to historic lows when trouble overseas sparked a
tremendous year-end rally in taxable bonds. Happily, this positive momentum
spilled over into municipal bond markets. When all was said and done, the Fund
posted a solid return, both from price appreciation and paying steady income.

For this report, we offer a discussion with Kathleen D. McClaskey, portfolio
manager of Pioneer Intermediate Tax-Free Fund. She leads the investment team
responsible for handling day-to-day management of your portfolio, and has been
managing the Fund for 11 years.

Q:    How did the Fund perform over the past 12 months?

A:    Municipal bond prices were strong for much of the year. As measured by the
      Lehman Brothers Municipal Bond Index, munis returned 9.19% for the year,
      above the 7.16% average return generated by intermediate municipal debt
      funds followed by Lipper Analytical Services. (Lipper is an independent
      company that tracks fund performance.)

      Your Fund's total return of 6.87% for Class A Shares at net asset value
      was close to that of other funds. Of course, by design your Fund is more
      conservative than longer-term bond funds, and you should not expect it to
      match their performance when long-term interest rates fall. Importantly,
      at year-end your Fund offered a tax-free 30-day yield of 3.41%. This was
      quite an attractive rate - equal to a taxable yield of 5.65% for investors
      in the maximum 39.6% tax bracket. We are pleased to report these
      competitive returns, especially since they were achieved with a moderate
      amount of risk and without sacrificing quality.

Q:    What fundamental factors shaped the U.S. bond market this year?

A:    Early in the year, all eyes were fixed on the economy. We experienced
      substantial economic growth powered by low unemployment - a traditional
      harbinger of inflation. The Federal Reserve, after months of "hands-off"
      policing of the economy, increased the federal funds rate by 0.25
      percentage points to 5.50% on March 25. Bond prices fell both before and
      after the much anticipated Fed move.


6
<PAGE>

Pioneer Intermediate Tax-Free Fund

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

      Although temporarily affected by the Fed's hike, municipal bonds benefited
      from several positive trends throughout 1997. Moderate demand for munis
      was matched with moderate supply, and with few new issues coming into the
      market, prices held fairly steady. Fears of a "flat tax" evaporated,
      restoring confidence in municipal bonds. Most importantly, both taxable
      and tax-free bond prices prospered as the economy resumed its "Goldilocks"
      condition - economic growth at a pace that was "not too hot, not too
      cold." Inflationary pressures cooled, and interest rates descended. These
      prime con ditions gave bond prices a boost and made a vital contribution
      to year-end performance.

Q:    How did global troubles affect U.S. bonds?

A:    In the fourth quarter, financial markets fell apart in Pacific Rim
      countries such as South Korea and Indonesia. The effects reached the
      United States, where stocks experienced - in the span of two October days
      - both their largest-ever point loss and gain. However, the effects were
      positive for fixed-income investments, including municipal bonds.
      Increased volatility in stocks caused many investors to allocate more
      assets to bonds. A "flight to quality" resulted as investors demanded
      historically "safer" investments, especially high-quality fixed-income
      securities. This mindset spilled over into the U.S. municipal bond market,
      and helped drive up prices of securities like those in your Fund.

Q:    With all these changes in 1997, how did you position the Fund?

A:    We kept the portfolio well diversified; it now has 63 holdings spread over
      33 states. We also focused on high-quality issues. At year-end, AAA-rated
      securities accounted for 36% of the portfolio, and AA securities were 46%.
      (Ratings are assigned by Standard & Poor's or Moody's Investor Services;
      AAA is the highest quality rating these agencies apply to debt issuers.)
      The average quality of Fund holdings remained a steady AA, as we expect it
      will for the foreseeable future.

      With interest rates at historic lows, a wave of refinancing is taking
      place and bonds with plump coupon rates are being "called" by their
      issuers. (When interest rates fall, issuers "call" existing debt, buying


                                                                               7
<PAGE>

Pioneer Intermediate Tax-Free Fund

- --------------------------------------------------------------------------------
PORTFOLIO MANAGEMENT DISCUSSION 12/31/97  (continued)
- --------------------------------------------------------------------------------

      it back from investors and replacing it with a new issue tied to lower
      interest rates.) In response, we searched diligently for other investment
      options. One effective strategy was to continue buying non-callable bonds
      throughout the year. These pay interest for the life of the bond, and if
      interest rates continue to decline, your Fund will benefit from a set
      income stream. This approach also slightly increased the Fund's effective
      average maturity. At year-end, average maturity was 8.89 years, up from
      8.06 years at the end of 1996. This is still solidly medium range and, we
      think, strikes a good balance between risk and reward.

      Our dedication to quality showed in our focus on insured bonds, now 19.7%
      of the portfolio. These securities give the Fund an extra modicum of price
      stability because third-party insurers guarantee that interest and
      principal payments will be made on time and in full, even if the issuer of
      the debt is unable to pay. Of course this guarantee applies to individual
      securities, not to the price or yield of Fund shares.

Q:    What's ahead for the Fund?

A:    We're still optimistic about municipal bonds. For one thing, demand is
      helping push prices higher. As more and more baby boomers approach
      retirement, we're likely to see them shift a larger percentage of assets
      into the historically lower-risk categories of fixed-income and tax-free
      investments. And even after the Taxpayer Relief Act of 1997, we think
      investors will want to protect their income and investments from taxes.

      Clearly, the effects of the Asian crisis are far reaching. They have
      certainly put a hold on any further interest rate intervention by the Fed,
      which we expect to continue its "wait and see attitude." The U.S. eco nomy
      continues to move forward at a steady pace, even with Asia's problems in
      the background. Inflation still appears to be contained. All of these are
      prime ingredients for continued low interest rates. In fact, we could see
      bond prices move even higher if rates continue to drop. But no matter
      which direction interest rates take, we will continue to focus on a
      portfolio of quality bonds with an overall intermediate maturity to help
      carry your Fund through 1998.


8
<PAGE>

Pioneer Intermediate Tax-Free Fund

- --------------------------------------------------------------------------------
SCHEDULE OF INVESTMENTS 12/31/97
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
                S&P/
              Moody's
Principal     Ratings
 Amount     (Unaudited)                                                         Value
<C>           <C>         <S>                                                <C>
                          TAX-EXEMPT OBLIGATIONS - 98.0%
                          Arizona - 4.9%
$1,000,000    AA/Aa       Arizona Transportation Board Highway Revenue,
                            6.0%, 2008                                       $1,131,590
 1,000,000    AA-/Aa      Phoenix Civic Improvement Corporation
                            Water Revenue, 6.5%, 2006                         1,152,950
 1,000,000    AA/Aa       Salt River Project Agricultural Improvement and
                            Power District, 5.75%, 2007                       1,101,000
                                                                             ----------
                                                                             $3,385,540
                                                                             ----------
            
                          California - 1.6%
 1,000,000    A+/A1       California State General Obligation, 6.0%, 2009    $1,132,980
                                                                             ----------
            
                          Connecticut - 4.0%
 1,000,000    AA-/Aa3     Connecticut State General Obligation,
                            6.0%, 2004                                       $1,101,810
 1,500,000    AAA/Aaa     Connecticut State Special Tax
                            Obligation, 6.0%, 2006                            1,680,150
                                                                             ----------
                                                                             $2,781,960
                                                                             ----------
            
                          District of Columbia - 0.8%
   500,000    A+/A1       Georgetown University General Obligation
                            Revenue, 8.125%, 2008                            $  515,115
                                                                             ----------
            
                          Delaware - 1.5%
 1,000,000    AA/A1       Delaware Transportation Authority, Transportation
                            System Revenue, 5.2%, 2001                       $1,037,510
                                                                             ----------
            
                          Florida - 4.8%
 1,000,000    AA/Aa       Gainesville Utilities Revenue, 5.75%, 2006         $1,103,590
 1,000,000    AA/Aa1      Orlando Utilities, Community Water & Electric
                            Revenue, 5.6%, 2003                               1,071,320
 1,000,000    AAA/Aaa     Palm Beach County Criminal Justice Revenue,
                            5.75%, 2013                                       1,104,920
                                                                             ----------
                                                                             $3,279,830
                                                                             ----------
</TABLE>


                   The accompanying footnotes are an integral
                     part of these financial statements.                       9
<PAGE>

Pioneer Intermediate Tax-Free Fund

- --------------------------------------------------------------------------------
SCHEDULE OF INVESTMENTS 12/31/97                                     (continued)
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
                S&P/
              Moody's
Principal     Ratings
 Amount     (Unaudited)                                                         Value
<C>           <C>         <S>                                                <C>
                          Georgia - 6.2%
$  400,000    A/A3        Georgia Municipal Electric Authority Power
                            Revenue, 7.65%, 1998                             $  408,000
 1,000,000    A/A3        Georgia Municipal Electric Authority Power
                            Revenue, 6.2%, 2010                               1,114,010
 1,500,000    AA+/Aaa     Georgia State General Obligation, 5.5%, 2006        1,628,445
 1,000,000    AA/Aa1      Private Colleges &Universities Revenue,
                            5.5%, 2005                                        1,079,170
                                                                             ----------
                                                                             $4,229,625
                                                                             ----------
            
                          Illinois - 6.3%
 1,000,000    AA/Aa1      Illinois Education Facilities Authority
                            Northwestern University Revenue, 5.5%, 2013      $1,062,320
 1,000,000    AAA/Aa3     Illinois State Sales Tax Revenue, 5.25%, 2000       1,056,220
 1,000,000    A+/A1       Illinois State Toll Highway Authority Revenue,
                            6.3%, 2012                                        1,143,920
 1,000,000    A+/A2       Metropolitan Pier and Exposition Authority,
                            Dedicated State Tax Revenue, 5.75%, 2002          1,059,870
                                                                             ----------
                                                                             $4,322,330
                                                                             ----------
            
                          Indiana - 6.4%
 1,500,000    AAA/Aaa     Indiana Municipal Power Agency, Power Supply
                            System Revenue, 6.0%, 2012                       $1,683,600
   500,000    A+/A1       Indiana Transportation Finance Authority Highway
                            Revenue, 8.0%, Prerefunded, 2008*                   518,570
 1,000,000    AAA/Aaa     Indiana University Revenue, 5.8%, 2010              1,113,470
 1,000,000    AA-/Aa2     Purdue University Revenue, 5.75%, 2004              1,082,650
                                                                             ----------
                                                                             $4,398,290
                                                                             ----------
            
                          Kansas - 2.5%
 1,500,000    AA/Aa       Kansas State Department of Transportation
                            Highway Revenue, 6.125%, 2009                    $1,716,315
                                                                             ----------
            
                          Kentucky - 2.7%
 1,000,000    AAA/Aaa     Kentucky State Turnpike Authority, Economic
                            Development Revenue, 5.25%, 2005                 $1,061,670
   750,000    AAA/A1      Lexington-Fayette Urban County Government
                            Revenue, 7.0%, 2006                                 812,813
                                                                             ----------
                                                                             $1,874,483
                                                                             ----------
</TABLE>   


                   The accompanying footnotes are an integral
10                     part of these financial statements.                     
<PAGE>

Pioneer Intermediate Tax-Free Fund

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

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

<TABLE>
<CAPTION>
                S&P/
              Moody's
Principal     Ratings
 Amount     (Unaudited)                                                         Value
<C>           <C>         <S>                                                <C>
                          Maine - 4.0%
$1,500,000    AA+/Aa3     Maine State General Obligation, 5.375%, 2006       $1,610,430
 1,000,000    AAA/Aaa     Maine State Turnpike Authority Revenue,
                            6.0%, 2005                                        1,107,330
                                                                             ----------
                                                                             $2,717,760
                                                                             ----------
            
                          Maryland - 4.6%
 1,500,000    NR/Aa2      Maryland Community Development Administration,
                            Single Family Mortgage Revenue, 5.95%, 2006      $1,563,720
 1,500,000    AA+/Aa3     University of Maryland System Auxiliary Facility
                            and Tuition Revenue, 5.4%, 2006                   1,608,960
                                                                             ----------
                                                                             $3,172,680
                                                                             ----------
            
                          Massachusetts - 4.7%
 1,000,000    AAA/Aaa     Commonwealth of Massachusetts Consolidated
                            Loan General Obligation, 5.5%, 2003              $1,063,210
 1,000,000    A+/A1       Massachusetts Bay Transportation Revenue,
                            5.5%, 2009                                        1,079,660
 1,000,000    AAA/Aaa     Massachusetts Water Pollution Abatement Trust
                            Sewer Revenue, 6.0%, 2007                         1,119,490
                                                                             ----------
                                                                             $3,262,360  
                                                                             ----------
            
                          Michigan - 3.2%
 1,000,000    AAA/Aaa     Detroit Michigan Water Supply Revenue,
                            5.75%, 2011                                      $1,097,770
 1,000,000    AA-/A1      Michigan State Trunk Line Sales Tax Revenue,
                            5.625%, 2003                                      1,068,890
                                                                             ----------
                                                                             $2,166,660  
                                                                             ----------
            
                          Minnesota - 4.3%
   750,000    AAA/Aaa     Minnesota Public Facilities Authority Water 
                            Pollution Control Revenue, 7.0%, 2009            $  791,677
 1,000,000    AAA/Aaa     Minnesota Public Facilities Authority Water 
                            Pollution Control Revenue, 5.0%, 2006             1,046,110
 1,000,000    AA/Aa3      University of Minnesota Revenue, 5.75%, 2018        1,091,440
                                                                             ----------
                                                                             $2,929,227  
                                                                             ----------
</TABLE>   


                   The accompanying footnotes are an integral
                     part of these financial statements.                      11
<PAGE>

Pioneer Intermediate Tax-Free Fund

- --------------------------------------------------------------------------------
SCHEDULE OF INVESTMENTS 12/31/97                                     (continued)
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
                S&P/
              Moody's
Principal     Ratings
 Amount     (Unaudited)                                                         Value
<C>           <C>        <S>                                                 <C>
                         Nebraska - 1.6%
$1,000,000    AAA/NR     Omaha Public Power District Electric System
                           Revenue, 6.5%, Prerefunded, 2002*                 $1,100,590
                                                                             ----------

                         Nevada - 0.1%
    65,000    AA/Aa2     Nevada Housing Division Single Family Program
                           Revenue, 8.0%, 2009                               $   66,528
                                                                             ----------

                         New Hampshire - 0.8%
   500,000    AAA/Aaa    New Hampshire Turnpike System Revenue,
                           7.375%, Prerefunded, 2000*                        $  545,070
                                                                             ----------

                         New Jersey - 2.8%
   750,000    AA-/Aaa    New Jersey Highway Authority Garden State
                           Parkway Senior Revenue, 7.25%,
                           Prerefunded, 1999*                                $  790,358
 1,000,000    AA+/Aa1    New Jersey Sales Tax Revenue, 5.8%, 2007             1,104,200
                                                                             ----------
                                                                             $1,894,558
                                                                             ----------

                         New Mexico - 1.5%
 1,000,000    AA/Aa      Bernalillo County, New Mexico, Gross Receipts
                           Tax Revenue, 5.0%, 2013                           $1,019,210
                                                                             ----------

                         New York - 1.5%
 1,000,000    A/A3       New York State Local Government Assistance
                           Corp. Revenue, 5.5%, 2017                         $1,066,390
                                                                             ----------

                         Ohio - 1.6%
 1,000,000    AAA/Aaa    Ohio State Water Development Authority,
                           6.0%, 2006                                        $1,120,200
                                                                             ----------

                         Oklahoma - 2.4%
 1,500,000    A-/A       Grand River Dam Authority Electric Revenue,
                           5.75%, 2006                                       $1,638,015
                                                                             ----------
</TABLE>


                   The accompanying footnotes are an integral
12                    part of these financial statements.                       
<PAGE>

Pioneer Intermediate Tax-Free Fund

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

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

<TABLE>
<CAPTION>
                S&P/
              Moody's
Principal     Ratings
 Amount     (Unaudited)                                                         Value
<C>           <C>         <S>                                                <C>
                          Pennsylvania - 4.1%
$1,500,000    AA-/A1      Pennsylvania State General Obligation,
                            6.25%, 2010                                      $1,730,205
 1,000,000    A/A1        Pennsylvania State Turnpike Commission Highway
                            Revenue, 5.45%, 2002                              1,054,520
                                                                             ----------
                                                                             $2,784,725
                                                                             ----------
              
                          Puerto Rico - 1.7%
 1,000,000    AAA/Aaa     University of Puerto Rico
                            Revenue, MBIA Insured, 6.25%, 2008               $1,150,680
                                                                             ----------
              
                          South Carolina - 4.8%
 1,000,000    AA/Aa       Columbia Waterworks & Sewer System
                            Revenue, 5.5%, 2009                              $1,083,750
 1,000,000    AA/Aa1      Greenville Waterworks Revenue, 6.0%, 2008           1,126,520
 1,000,000    AAA/Aaa     South Carolina General Obligation, 5.75%, 2003      1,079,490
                                                                             ----------
                                                                             $3,289,760    
                                                                             ----------
              
                          Texas - 7.1%
 1,000,000    AA/Aa2      Port Houston Authority Revenue, 5.0%, 2005         $1,041,980
   750,000    AAA/Aaa     San Antonio Prior Lien Water
                            Revenue, 7.125%, Prerefunded, 1999*                 792,307
 1,000,000    AAA/Aaa     Texas Municipal Power Revenue, 5.5%, 2010           1,086,610
 1,500,000    AA/Aa2      Texas State General Obligation, 5.8%, 2004          1,637,385
   250,000    AAA/Aaa     University of Texas Permanent University Fund,
                            Escrowed to Maturity in Government
                            Securities, 8.0%, 2004                              302,050
                                                                             ----------
                                                                             $4,860,332    
                                                                             ----------
              
                          Utah - 0.0%
    25,000    AA/Aa       Utah Housing Finance Agency,
                            Single Family Mortgage Purchase Revenue,
                            7.3%, 2003                                       $   25,395
                                                                             ----------
              
                          Vermont - 0.8%
   500,000    AAA/Aaa     Vermont Municipal Bond Bank, 7.9%,
                            Prerefunded, 1998*                               $  528,465
                                                                             ----------
</TABLE>     


                   The accompanying footnotes are an integral
                     part of these financial statements.                      13
<PAGE>

Pioneer Intermediate Tax-Free Fund

- --------------------------------------------------------------------------------
SCHEDULE OF INVESTMENTS 12/31/97                                     (continued)
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
                S&P/
              Moody's
Principal     Ratings
 Amount     (Unaudited)                                                         Value
<C>           <C>         <S>                                                <C>
                          Virginia - 1.6%
$1,000,000    AA/Aa       Virginia State Public School Authority, Special
                            Obligation, 5.4%, 2004                          $ 1,064,650 
                                                                            -----------

                          Washington - 1.6%
 1,000,000    AA/Aa1      Washington State General Obligation,
                            6.0%, 2002                                      $ 1,074,130
                                                                            -----------

                          Wisconsin - 1.5%
 1,000,000    AA/Aa2      Wisconsin State General Obligation,
                            5.3%, 2012                                      $ 1,054,730
                                                                            -----------

                          TOTAL TAX-EXEMPT OBLIGATIONS
                          (Cost $63,794,446)(a)                             $67,206,093
                                                                            -----------

                          TEMPORARY CASH INVESTMENTS - 2.0%
   100,000                California Pollution Control Revenue,
                            4.9%, 2000**                                    $   100,000
   100,000                California Pollution Control Revenue,
                            4.9%, 2011**                                        100,000
   500,000                Jackson County, Mississippi Pollution Control
                            Revenue, 3.55%, 2023**                              500,000
   200,000                Uinta County, Wyoming Pollution Control Revenue,
                            3.8%, 2010**                                        200,000
   200,000                Uinta County, Wyoming Pollution Control Revenue,
                            3.55%, 2020**                                       200,000
   300,000                Uinta County, Wyoming Pollution Control Revenue,
                            5.0%, 2022**                                        300,000
                                                                            -----------
                          TOTAL TEMPORARY CASH INVESTMENTS
                          (Cost $1,400,000)                                 $ 1,400,000
                                                                            -----------
                          TOTAL INVESTMENT IN SECURITIES - 100%
                          (Cost $65,194,446)(b)                             $68,606,093
                                                                            ===========
</TABLE>


                   The accompanying footnotes are an integral
14                    part of these financial statements.                      
<PAGE>

Pioneer Intermediate Tax-Free Fund

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

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

NR    Not rated.

*     Prerefunded bond has been collateralized by U.S. Treasury securities which
      are held in escrow and used to pay principal and interest in the
      tax-exempt issue and to retire the bond in full at the earliest refunding
      date.

**    Security with daily "put" feature with resetting interest rates. Coupon
      rate disclosed is as of December 31, 1997.

(a)   The concentration of securities, by type of obligation/market sector, is
      as follows:
      General Obligation                               21.1%
      Escrowed in U.S. Government Securities            9.0
      Revenue Bonds:
        Education                                      11.9
        Housing                                         5.7
        Insured                                        19.8
        Power                                           9.0
        Sales Tax                                       6.3
        Transportation                                 12.2
        Water                                           5.0
     
(b)   At December 31, 1997, the net unrealized gain on investments based on cost
      for federal income tax purposes of $65,194,446 was as follows:

      Aggregate gross unrealized gain for all investments in which 
        there is an excess of value over tax cost                   $  3,411,647
      Aggregate gross unrealized loss for all investments in which 
        there is an excess of tax cost over value                             --
                                                                    ------------
      Net unrealized gain                                           $  3,411,647
                                                                    ============

Purchases and sales of securities (excluding temporary cash investments) for the
year ended December 31, 1997 aggregated $23,834,960 and $33,755,948,
respectively.


                   The accompanying footnotes are an integral
                      part of these financial statements.                     15
<PAGE>

Pioneer Intermediate Tax-Free Fund

- --------------------------------------------------------------------------------
BALANCE SHEET 12/31/97
- --------------------------------------------------------------------------------

ASSETS:
  Investment in securities, at value (including temporary cash
  investments of $1,400,000) (cost $65,194,446)                 $68,606,093
  Cash                                                               15,121
  Receivables -
    Fund shares sold                                                 60,542
    Interest                                                      1,094,565
  Other                                                               7,688
                                                                -----------
      Total assets                                              $69,784,009
                                                                -----------

LIABILITIES:
  Payables -
    Investment securities purchased                             $ 1,046,994
    Dividends                                                        77,788
  Due to affiliates                                                  76,326
  Accrued expenses                                                   47,905
                                                                -----------
      Total liabilities                                         $ 1,249,013
                                                                -----------

NET ASSETS:
  Paid-in capital                                               $65,038,537
  Accumulated undistributed net investment income                     2,083
  Accumulated undistributed net realized gain on investments         82,729
  Net unrealized gain on investments                              3,411,647
                                                                -----------
      Total net assets                                          $68,534,996
                                                                ===========

NET ASSET VALUE PER SHARE:
(Unlimited number of shares authorized)
  Class A (based on $65,225,339/6,239,872 shares)               $     10.45
                                                                ===========
  Class B (based on $3,010,001/287,535 shares)                  $     10.47
                                                                ===========
  Class C (based on $299,656/28,580 shares)                     $     10.48
                                                                ===========

MAXIMUM OFFERING PRICE:
  Class A                                                       $     10.83
                                                                ===========


16  The accompanying notes are an integral part of these financial statements.
<PAGE>

Pioneer Intermediate Tax-Free Fund

- --------------------------------------------------------------------------------
STATEMENT OF OPERATIONS
- --------------------------------------------------------------------------------
For the Year Ended 12/31/97

INVESTMENT INCOME:
  Interest                                      $3,690,600
                                                ----------
    Total investment income                                       $3,690,600
                                                                  ---------- 
EXPENSES:
  Management fees                               $  351,207
  Transfer agent fees
    Class A                                         71,832
    Class B                                          3,720
    Class C                                            367
  Distribution fees
    Class A                                        159,818
    Class B                                         28,341
    Class C                                          2,297
  Accounting                                        72,885
  Custodian fees                                    19,244
  Registration fees                                 37,173
  Professional fees                                 40,350
  Printing                                          10,676
  Fees and expenses of nonaffiliated trustees       13,311
  Miscellaneous                                     34,459
                                                ----------
    Total expenses                                                $  845,680
    Less management fees waived by
      Pioneering Management Corporation                             (104,683)
    Less fees paid indirectly                                        (14,325)
                                                                  ---------- 
    Net expenses                                                   $ 726,672
                                                                  ---------- 
      Net investment income                                       $2,963,928
                                                                  ---------- 
REALIZED AND UNREALIZED GAIN ON INVESTMENTS:
  Net realized gain on investments                                $1,112,008
  Change in net unrealized gain on investments                       579,896
                                                                  ---------- 
    Net gain on investments                                       $1,691,904
                                                                  ---------- 
    Net increase in net assets resulting from operations          $4,655,832
                                                                  ==========


The accompanying notes are an integral part of these financial statements.  17
<PAGE>

Pioneer Intermediate Tax-Free Fund

- --------------------------------------------------------------------------------
STATEMENTS OF CHANGES IN NET ASSETS
- --------------------------------------------------------------------------------
For the Years Ended 12/31/97 and 12/31/96

<TABLE>
<CAPTION>
                                                               Year Ended           Year Ended
FROM OPERATIONS:                                                12/31/97             12/31/96
<S>                                                           <C>                  <C>         
Net investment income                                         $  2,963,928         $  3,540,782
Net realized gain on investments                                 1,112,008              196,137
Change in net unrealized gain on investments                       579,896           (1,494,178)
                                                              ------------         ------------
     Net increase in net assets resulting from operations     $  4,655,832         $  2,242,741
                                                              ------------         ------------

DISTRIBUTIONS TO SHAREHOLDERS:                                                    
Net investment income:                                                            
   Class A ($0.44 and $0.47 per share, respectively)          $ (2,841,400)        $ (3,461,175)
   Class B ($0.37 and $0.38 per share, respectively)              (101,513)            (105,009)
   Class C ($0.34 and $0.33 per share, respectively)                (7,472)              (6,042)
In excess of net investment income:                                               
   Class A ($0.00 and $0.00 per share, respectively)                     -               (5,392)
   Class C ($0.00 and $0.01 per share, respectively)                     -                 (238)
Net realized gain:                                                                
   Class A ($0.08 and $0.00 per share, respectively)              (511,871)                   -
   Class B ($0.08 and $0.00 per share, respectively)               (22,707)                   -
   Class C ($0.08 and $0.00 per share, respectively)                (2,343)                   -
                                                              ------------         ------------
     Total distributions to shareholders                      $ (3,487,306)        $ (3,577,856)
                                                              ------------         ------------

                                                                                  
FROM FUND SHARE TRANSACTIONS:                                                     
Net proceeds from sale of shares                              $  3,967,917         $  8,160,271
Reinvestment of distributions                                    2,280,319            2,196,836
Cost of shares repurchased                                     (15,334,302)         (14,554,121)
                                                              ------------         ------------
   Net decrease in net assets resulting from                                      
     fund share transactions                                  $ (9,086,066)        $ (4,197,014)
                                                              ------------         ------------
   Net decrease in net assets                                 $ (7,917,540)        $ (5,532,129)
                                                              ------------         ------------
NET ASSETS:                                                                       
Beginning of year                                               76,452,536           81,984,665
                                                              ------------         ------------
End of year (including accumulated undistributed                                  
   net investment income of $2,083 and $0, respectively)      $ 68,534,996         $ 76,452,536
                                                              ============         ============
                                                                            
<CAPTION>

CLASS A                         '97 Shares     '97 Amount      '96 Shares       '96 Amount
<S>                            <C>             <C>             <C>             <C>         
Shares sold                       290,169     $  3,000,480        678,298     $  6,961,860
Reinvestment of distributions     212,121        2,189,076        206,717        2,116,538
Less shares repurchased        (1,404,597)     (14,465,457)    (1,352,057)     (13,837,542)
                               ----------     ------------     ----------     ------------
   Net decrease                  (902,307)    $ (9,275,901)      (467,042)    $ (4,759,144)
                               ==========     ============     ==========     ============
                                                                             
CLASS B                                                                      
Shares sold                        85,716     $    882,162         95,563     $    984,982
Reinvestment of distributions       7,998           82,765          7,217           74,044
Less shares repurchased           (84,079)        (868,240)       (68,872)        (701,579)
                               ----------     ------------     ----------     ------------
   Net increase                     9,635     $     96,687         33,908     $    357,447
                               ==========     ============     ==========     ============
                                                                             
CLASS C*                                                                     
Shares sold                         8,221     $     85,275         20,459     $    213,429
Reinvestment of distributions         819            8,478            611            6,254
Less shares repurchased               (58)            (605)        (1,472)         (15,000)
                               ----------     ------------     ----------     ------------
   Net increase                     8,982     $     93,148         19,598     $    204,683
                               ==========     ============     ==========     ============
</TABLE>

* Class C shares were first publicly offered on January 31, 1996.


18  The accompanying notes are an integral part of these financial statements.
<PAGE>

Pioneer Intermediate Tax-Free Fund

- --------------------------------------------------------------------------------
FINANCIAL HIGHLIGHTS 12/31/97
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
                                                                   Year           Year          Year           Year         Year
                                                                   Ended         Ended          Ended          Ended        Ended
CLASS A                                                          12/31/97       12/31/96      12/31/95      12/31/94(a)   12/31/93
<S>                                                               <C>           <C>           <C>            <C>           <C>    
Net asset value, beginning of year                                $ 10.28       $ 10.44       $  9.62        $ 10.76       $ 10.32
                                                                  -------       -------       -------        -------       -------
Increase (decrease) from investment operations:                                                                          
    Net investment income                                         $  0.44       $  0.46       $  0.49        $  0.49       $  0.56
    Net realized and unrealized gain (loss) on investments           0.25         (0.15)         0.82          (1.13)         0.56
                                                                  -------       -------       -------        -------       -------
           Net increase (decrease) from investment operations     $  0.69       $  0.31       $  1.31        $ (0.64)      $  1.12
Distributions to shareholders:                                                                                           
    Net investment income                                           (0.44)        (0.47)        (0.49)         (0.49)        (0.56)
    Net realized gain                                               (0.08)            -             -          (0.01)        (0.12)
                                                                  -------       -------       -------        -------       -------
Net increase (decrease) in net asset value                        $  0.17       $ (0.16)      $  0.82        $ (1.14)      $  0.44
                                                                  -------       -------       -------        -------       -------
Net asset value, end of year                                      $ 10.45       $ 10.28       $ 10.44        $  9.62       $ 10.76
                                                                  =======       =======       =======        =======       =======
Total return*                                                        6.87%         3.03%        13.80%         (6.02)%       11.08%
Ratio of net expenses to average net assets                          1.02%+        1.03%+        1.02%+         1.00%         0.85%
Ratio of net investment income to average net assets                 4.23%+        4.47%+        4.77%+         4.89%         5.23%
Portfolio turnover rate                                                35%           34%           29%            39%           14%
Net assets, end of year (in thousands)                            $65,225       $73,387       $79,432        $76,674       $82,907
Ratios assuming no waiver of management fees by PMC and                                                                  
    no reduction for fees paid indirectly:                                                                               
        Net expenses                                                 1.17%         1.14%         1.12%          1.22%         1.12%
        Net investment income                                        4.08%         4.36%         4.67%          4.67%         4.97%
Ratios assuming waiver of management fees by PMC                                                                         
    and reduction for fees paid indirectly:                                                                              
        Net expenses                                                 1.00%         1.00%         1.00%            --            --
        Net investment income                                        4.25%         4.50%         4.79%            --            --
</TABLE>

(a)   The per share data presented above is based upon the average shares
      outstanding for the period presented.
*     Assumes initial investment at net asset value at the beginning of each
      period, reinvestment of distributions, the complete redemption of the
      investment at net asset value at the end of each period, and no sales
      charges. Total return would be reduced if sales charges were taken into
      account.
+     Ratio assuming no reduction for fees paid indirectly.


The accompanying notes are an integral part of these financial statements.  19
<PAGE>

Pioneer Intermediate Tax-Free Fund

- -------------------------------------------------------------------------------
FINANCIAL HIGHLIGHTS 12/31/97
- -------------------------------------------------------------------------------

<TABLE>
<CAPTION>
                                                                   Year        Year         Year       4/29/94
                                                                   Ended       Ended        Ended         to
CLASS B                                                          12/31/97    12/31/96     12/31/95    12/31/94(a)
<S>                                                             <C>           <C>           <C>          <C>   
Net asset value, beginning of period                            $10.31        $10.46        $ 9.65       $10.07
                                                               -------       -------       -------      -------
Increase (decrease) from investment operations:                                                       
    Net investment income                                       $ 0.36        $ 0.38        $ 0.41       $ 0.27
    Net realized and unrealized gain (loss) on investments        0.25         (0.15)         0.80        (0.42)
                                                               -------       -------       -------      -------
        Net increase (decrease) from investment operations      $ 0.61        $ 0.23        $ 1.21       $(0.15)
Distributions to shareholders:                                                                        
    Net investment income                                        (0.37)        (0.38)        (0.40)       (0.27)
    Net realized gain                                            (0.08)           --            --           --
                                                               -------       -------       -------      -------
Net increase (decrease) in net asset value                      $ 0.16        $(0.15)       $ 0.81       $(0.42)
                                                               -------       -------       -------      -------
Net asset value, end of period                                  $10.47        $10.31        $10.46       $ 9.65
                                                               =======       =======       =======      =======
Total return*                                                     6.08%         2.25%        12.71%       (1.49)%
Ratio of net expenses to average net assets                       1.81%+        1.81%+        1.86%+       1.84%**
Ratio of net investment income to average net assets              3.44%+        3.68%+        3.90%+       4.17%**
Portfolio turnover rate                                             35%           34%           29%          39%
Net assets, end of period (in thousands)                        $3,010        $2,864        $2,553       $1,529
Ratios assuming no waiver of management fees by PMC and                          
    no reduction for fees paid indirectly:                                  
        Net expenses                                              1.96%         1.91%         1.96%        2.14%**
        Net investment income                                     3.29%         3.58%         3.80%        3.87%**
Ratios assuming waiver of management fees by PMC                           
    and reduction for fees paid indirectly:                           
        Net expenses                                              1.79%         1.76%         1.82%          --
        Net investment income                                     3.46%         3.73%         3.94%          --
</TABLE>

(a)   The per share data presented above is based upon the average shares
      outstanding for the period presented.
*     Assumes initial investment at net asset value at the beginning of each
      period, reinvestment of distributions, the complete redemption of the
      investment at net asset value at the end of each period, and no sales
      charges. Total return would be reduced if sales charges were taken into
      account.
**    Annualized.
+     Ratio assuming no reduction for fees paid indirectly.


20  The accompanying notes are an integral part of these financial statements.  
<PAGE>

Pioneer Intermediate Tax-Free Fund

- -------------------------------------------------------------------------------
FINANCIAL HIGHLIGHTS 12/31/97
- -------------------------------------------------------------------------------

                                                     Year Ended   1/31/96 to
CLASS C                                                12/31/97    12/31/96
Net asset value, beginning of period                    $ 10.29     $ 10.51
                                                        -------     -------
Increase (decrease) from investment operations:
  Net investment income                                 $  0.35     $  0.33
  Net realized and unrealized gain (loss)
      on investments                                       0.26       (0.21)
                                                        -------     -------
      Net increase from investment operations           $  0.61     $  0.12
Distributions to shareholders:
  Net investment income                                   (0.34)      (0.33)
  In excess of net investment income                         --       (0.01)
  Net realized gain                                       (0.08)         --
                                                        -------     -------
Net increase (decrease) in net asset value              $  0.19     $ (0.22)
                                                        -------     -------
Net asset value, end of period                           $10.48     $ 10.29
                                                        =======     =======
Total return*                                              6.04%       1.22%
Ratio of net expenses to average net assets                1.84%+      1.97%**+
Ratio of net investment income to average net assets       3.41%+      3.51%**+
Portfolio turnover rate                                      35%         34%
Net assets, end of period (in thousands)                $   300     $   202
Ratios assuming no waiver of management fees by PMC
  and no reduction for fees
  paid indirectly:
    Net expenses                                           1.99%       2.08%**
    Net investment income                                  3.26%       3.40%**
Ratios assuming waiver of management fees by PMC
  and reduction for fees paid
  indirectly:
    Net expenses                                           1.82%       1.89%**
    Net investment income                                  3.43%       3.59%**

*     Assumes initial investment at net asset value at the beginning of each
      period, reinvestment of distributions, the complete redemption of the
      investment at net asset value at the end of each period, and no sales
      charges. Total return would be reduced if sales charges were taken into
      account.
**    Annualized.
+     Ratio assuming no reduction for fees paid indirectly.


The accompanying notes are an integral part of these financial statements.  21
<PAGE>

Pioneer Intermediate Tax-Free Fund

- --------------------------------------------------------------------------------
NOTES TO FINANCIAL STATEMENTS 12/31/97
- --------------------------------------------------------------------------------

1. Organization and Significant Accounting Policies

Pioneer Intermediate Tax-Free Fund (the Fund) is a Massachusetts business trust
registered under the Investment Company Act of 1940 as a diversified, open-end
management investment company. The investment objective of the Fund is to seek a
high level of current income exempt from federal income taxes.

The Fund offers three classes of shares - Class A, Class B, and Class C shares.
Shares of Class A, Class B, and Class C each represent an interest in the same
portfolio of investments of the Fund and have equal rights to voting,
redemptions, dividends and liquidation, except that each class of shares can
bear different transfer agent and distribution fees and have exclusive voting
rights with respect to the distribution plans that have been adopted by Class A,
Class B, and Class C shareholders, respectively.

The Fund's financial statements have been prepared in conformity with generally
accepted accounting principles that require the management of the Fund to, among
other things, 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 revenues and
expenses during the reporting periods. Actual results could differ from those
estimates. The following is a summary of significant accounting policies
consistently followed by the Fund, which are in conformity with those generally
accepted in the investment company industry:

A.    Security Valuation

      Security transactions are recorded on trade date. Securities are valued
      based on valuations furnished by independent pricing services that utilize
      matrix systems. These matrix systems reflect such factors as security
      prices, yields, maturities, and ratings and are supplemented by dealer and
      exchange quotations and fair market value information from other sources,
      as required. Market discount and premium are accreted or amortized daily
      on a straight-line basis. Original issue discount is accreted daily into
      interest income on a yield-to-maturity basis with a corresponding increase
      in the cost basis of the security. Interest income is recorded on the
      accrual basis. Temporary cash investments are valued at amortized cost.


22
<PAGE>

Pioneer Intermediate Tax-Free Fund

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

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

      Gains and losses on sales of investments are calculated on the identified
      cost method for both financial reporting and federal income tax purposes.
      It is the Fund's practice to first select for sale those securities that
      have the highest cost and also qualify for long-term capital gain or loss
      treatment for tax purposes.

B.    Federal Income Taxes

      It is the Fund's policy to comply with the requirements of the Internal
      Revenue Code applicable to regulated investment companies and to
      distribute all of its taxable income and net realized capital gains, if
      any, to its shareholders. Therefore, no federal tax provision is required.

      The characterization of distributions to shareholders for financial
      reporting purposes is determined in accordance with federal income tax
      rules. Therefore, the source of the Fund's distributions may be shown in
      the accompanying financial statements as either from or in excess of net
      investment income or net realized gain on investment transactions, or from
      paid-in capital, depending on the type of book/tax differences that may
      exist.

      At December 31, 1997, the Fund reclassified $11,460 from accumulated
      undistributed net investment income to accumulated undistributed net
      realized gain on investments. The reclassification has no impact on the
      net asset value of the Fund and is designed to present the Fund's capital
      accounts on a tax basis.

      In order to comply with federal income tax regulations, the Fund has
      des-ignated $608,190 as a capital gain dividend for the purposes of the
      dividend paid deduction. Of this amount, $90,367 and $517,823 are subject
      to the maximum 28% and 20% federal income tax rates, respectively.

      In order to comply with federal income tax regulations, the Fund has
      designated $2,952,468 as tax-exempt interest dividends. For purposes of
      the dividend exclusion, none of the distributions per share qualify for
      the exclusion.


                                                                              23
<PAGE>

Pioneer Intermediate Tax-Free Fund

- --------------------------------------------------------------------------------
NOTES TO FINANCIAL STATEMENTS 12/31/97                               (continued)
- --------------------------------------------------------------------------------

C.    Fund Shares

      The Fund records sales and repurchases of its shares on trade date. Net
      losses, if any, as a result of cancellations are absorbed by Pioneer Funds
      Distributor, Inc. (PFD), the principal underwriter for the Fund and an
      indirect subsidiary of The Pioneer Group, Inc. (PGI). PFD earned $5,138 in
      underwriting commissions on the sale of the fund shares during the year
      ended December 31, 1997.

D.    Class Allocations

      Distribution fees are calculated based on the average daily net asset
      value attributable to Class A, Class B, and Class C shares of the Fund,
      respectively. Shareholders of each class share all expenses and fees paid
      to the transfer agent, Pioneering Services Corporation (PSC), for their
      services, which are allocated based on the number of accounts in each
      class and the ratable allocation of related out-of-pocket expense (see
      Note 3). Income, common expenses and realized and unrealized gains and
      losses are calculated at the Fund level and allocated daily to each class
      of shares based on the respective percentage of adjusted net assets at the
      beginning of the day. The Fund declares as daily dividends substantially
      all of its net investment income. All dividends are paid on a monthly
      basis. Short-term capital gain distributions, if any, may be declared with
      the daily dividends. Distributions to shareholders are recorded as of the
      ex-dividend date. Distributions paid by the Fund with respect to each
      class of shares are calculated in the same manner, at the same time, and
      in the same amount, except that Class A, Class B, and Class C shares can
      bear different transfer agent and distribution fees.

2.    Management Agreement

Pioneering Management Corporation (PMC), the Fund's investment adviser, manages
the Fund's portfolio and is a wholly owned subsidiary of PGI. Management fees
are calculated daily at the annual rate of 0.50% of the Fund's average daily net
assets.

PMC has agreed not to impose a portion of its management fee and to assume other
operating expenses of the Fund to the extent necessary to limit Class A expenses
to 1.00% of the average daily net assets attributable to Class A shares; the
portion of the Fund-wide expenses attributable to Class B and Class C shares
will be reduced only to the extent that such expenses are reduced for Class A
shares. PMC's agreement is voluntary and temporary and may be revised or
terminated at any time.


24
<PAGE>

Pioneer Intermediate Tax-Free Fund

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

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

In addition, under the management agreement, certain other services and costs,
including accounting, regulatory reporting and insurance premiums, are paid by
the Fund. At December 31, 1997, $25,667 was payable to PMC related to management
fees and certain other services.

3.    Transfer Agent

PSC, a wholly owned subsidiary of PGI, provides substantially all transfer agent
and shareholder services to the Fund at negotiated rates. Included in due to
affiliates is $7,965 in transfer agent fees payable to PSC at December 31, 1997.

4.    Distribution Plans

The Fund adopted a Plan of Distribution for each class of shares (Class A Plan,
Class B Plan, and Class C Plan) in accordance with Rule 12b-1 of the Investment
Company Act of 1940. Pursuant to the Class A Plan, the Fund pays PFD a service
fee of up to 0.25% of the Fund's average daily net assets in reimbursement of
its actual expenditures to finance activities primarily intended to result in
the sale of Class A shares. Pursuant to the Class B Plan and the Class C Plan,
the Fund pays PFD 1.00% of the average daily net assets attributable to each
class of shares. The fee consists of a 0.25% service fee and a 0.75%
distribution fee paid as compensation for personal services and/or account
maintenance services or distribution services with regard to Class B and Class C
shares. Included in due to affiliates is $42,694 in distribution fees payable to
PFD at December 31, 1997.

In addition, redemptions of each class of shares may be subject to a contingent
deferred sales charge (CDSC). A CDSC of 1.00% may be imposed on redemptions of
certain net asset value purchases of Class A shares within one year of purchase.
Class B shares that are redeemed within six years of purchase are subject to a
CDSC at declining rates beginning at 3%, based on the lower of cost or market
value of shares being redeemed. Redemptions of Class C shares within one year of
purchase are subject to a CDSC of 1.00%. Proceeds from the CDSC are paid to PFD.
For the year ended December 31, 1997, CDSCs in the amount of $4,065 were paid to
PFD.

5.    Expense Reductions

The Fund has entered into certain expense offset arrangements resulting in a
reduction in the Fund's total expenses. For the year ended December 31, 1997,
the Fund's expenses were reduced by $14,325 under such arrangements.


                                                                              25
<PAGE>

Pioneer Intermediate Tax-Free Fund

- --------------------------------------------------------------------------------
REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS
- --------------------------------------------------------------------------------

To the Shareholders and the Board of Trustees of Pioneer Intermediate Tax-Free
Fund:

We have audited the accompanying balance sheet, including the schedule of
investments, of Pioneer Intermediate Tax-Free Fund, as of December 31, 1997, and
the related statement of operations, the state ments of changes in net assets,
and the financial highlights for the periods presented. These financial
statements and financial highlights are the responsibility of the Fund's
management. Our responsibility is to express an opinion on these financial
statements and financial highlights based on our audits.

We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements and financial
highlights are free of material misstatement. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements. Our procedures included confirmation of securities owned as of
December 31, 1997, by correspondence with the custodian. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements and financial highlights referred to
above present fairly, in all material respects, the financial position of
Pioneer Intermediate Tax-Free Fund as of December 31, 1997, the results of its
operations, the changes in its net assets and the financial highlights for the
periods presented, in conformity with generally accepted accounting principles.

ARTHUR ANDERSEN LLP

Boston, Massachusetts
February 2, 1998


26
<PAGE>

Pioneer Intermediate Tax-Free Fund

- --------------------------------------------------------------------------------
TRUSTEES, OFFICERS AND SERVICE PROVIDERS
- --------------------------------------------------------------------------------

Trustees                           Officers
John F. Cogan, Jr.                 John F. Cogan, Jr., Chairman and President
Mary K. Bush                       David D. Tripple, Executive Vice President
Richard H. Egdahl, M.D.            Kathleen D. McClaskey, Vice President
Margaret B.W. Graham               William H. Keough, Treasurer
John W. Kendrick                   Joseph P. Barri, Secretary
Marguerite A. Piret
David D. Tripple
Stephen K. West
John Winthrop

Investment Adviser
Pioneering Management Corporation

Custodian
Brown Brothers Harriman & Co.

Independent Public Accountants
Arthur Andersen LLP

Principal Underwriter
Pioneer Funds Distributor, Inc.

Legal Counsel
Hale and Dorr LLP

Shareowner Services and Transfer Agent
Pioneering Services Corporation


                                                                              27
<PAGE>

- --------------------------------------------------------------------------------
PROGRAMS AND SERVICES FOR PIONEER SHAREOWNERS
- --------------------------------------------------------------------------------

Your investment professional can give you additional information on Pioneer's
programs and services. If you want to order literature on any of the following
items directly, simply call Pioneer at 1-8O0-225-6292.

FactFone(SM)

Our automated account information service, available to you 24 hours a day,
seven days a week. FactFone gives you a quick and easy way to check fund share
prices, yields, dividends and distributions, as well as information about your
own account. Simply call 1-800-225-4321. For specific account information, have
your 13-digit account number and four-digit personal identification number at
hand.

9O-Day Reinstatement Privilege (for Class A Shares)

Enables you to reinvest all or a portion of the money you redeem from your
Pioneer account - without paying a sales charge - within 90 days of your
redemption. You have the choice of investing in any Pioneer fund, as long as you
meet its minimum investment requirement.

Investomatic Plan

An easy and convenient way for you to invest on a regular basis. All you need to
do is authorize a set amount of money to be moved out of your bank account into
the Pioneer fund of your choice. Investomatic also allows you to change the
dollar amount, frequency and investment date right over the phone. By putting
aside affordable amounts of money regularly, you can build a long-term
investment - without sacrificing your current standard of living.

Payroll Investment Program (PIP)

Lets you invest in a Pioneer fund directly through your paycheck. All that's
involved is for your employer to fill out an authorization form allowing Pioneer
to deduct from participating employees' paychecks. You specify the dollar amount
you want to invest into the Pioneer fund(s) of your choice.


28
<PAGE>

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

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

Automatic Exchange Program

A simple way to move money from one Pioneer fund to another over a period of
time. Just invest a lump sum in one fund, and select the other Pioneer funds you
wish to invest in. You choose the amounts and dates for Pioneer to sell shares
of your original fund and use the proceeds to buy shares of the funds you have
chosen. Over time, your investment will be shifted out of the original fund.
(Automatic Exchange is available for originating accounts with a balance of
$5,000 or more.)

Directed Dividends

Lets you invest cash dividends from one Pioneer fund to an account in another
Pioneer fund with no sales charge or fee. Simply fill out the applicable
information on a Pioneer Account Options Form. (This program is available for
dividend payments only; capital gains distri butions are not eligible at this
time.)

Direct Deposit

Lets you move money into your bank account using electronic funds transfer
(EFT). EFT moves your money faster than you would receive a check, eliminates
unnecessary paper and mail, and avoids lost checks. Simply fill out a Pioneer
Direct Deposit Form, giving your instructions.

Systematic Withdrawal Plan (SWP)

Lets you establish automatic withdrawals from your account at set intervals. You
decide the frequency and the day of the month you want. Pioneer will send the
proceeds by check to the address you designate, or electronically to your bank
account. You also can authorize Pioneer to make the redemptions payable to
someone else. (SWPs are available only for accounts with a value of $10,000 or
more.)


                                                                              29
<PAGE>

- --------------------------------------------------------------------------------
HOW TO CONTACT PIONEER
- --------------------------------------------------------------------------------

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

Call us for:

Account Information, including existing accounts,
new accounts, prospectuses, applications
and service forms                                           1-800-225-6292

FactFone(SM) for automated fund yields, prices,
account information and transactions                        1-800-225-4321

Retirement plans information                                1-800-622-0176

Telecommunications Device for the Deaf (TDD)                1-800-225-1997

Write to us:

Pioneering Services Corporation
60 State Street
Boston, Massachusetts 02109

Our toll-free fax                                           1-800-225-4240

Our Internet e-mail address                           [email protected]
(for general questions about Pioneer only)

Visit our web site:                                   www.pioneerfunds.com

This report must be preceded or accompanied by a current Fund prospectus.

[PIONEER LOGO]    Pioneer Funds Distributor, Inc.
                  60 State Street
                  Boston, Massachusetts  02109
                  www.pioneerfunds.com

       0298-4807
(C)    Pioneer Funds Distributor, Inc.
[RECYCLE LOGO] Printed on Recycled Paper



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