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

                                   FORM N-CSR

                   CERTIFIED SHAREHOLDER REPORT OF REGISTERED
                        MANAGEMENT INVESTMENT COMPANIES



Investment Company Act file number 811-05516


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


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


      Joseph P. Barri, Hale and Dorr LLP, 60 State Street, Boston, MA 02109
                    (Name and address of agent for service)


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


Date of fiscal year end:  June 30


Date of reporting period:  January 1, 2003 through June 30, 2003


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

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




                                     PIONEER
                            -----------------------
                                    AMERICA
                                     INCOME
                                     TRUST

                                   Semiannual
                                     Report

                                    6/30/03

                          [LOGO] PIONEER Investments(R)



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


                                          
Letter from the President                     1
Portfolio Summary                             2
Performance Update                            3
Portfolio Management Discussion               7
Schedule of Investments                      11
Financial Statements                         14
Notes to Financial Statements                22
Trustees, Officers and Service Providers     27
Retirement Plans from Pioneer                28




Pioneer America Income Trust
LETTER FROM THE PRESIDENT 6/30/03

Dear Shareowners,
- --------------------------------------------------------------------------------
With the fading of concerns over the Iraq war, investors whose attention had
been focused overseas were buoyed this spring by hints of increased economic
activity at home. The nation's stock markets began a broad-based rally in early
March, and prices continued to climb. From April through June, the major stock
market averages recorded one of the biggest quarterly jumps in years. Increasing
investor confidence also led to strong returns on corporate bonds. However,
returns on government bonds, which rose sharply earlier, have slowed.

Encouraging factors aren't hard for investors to find. The lowest interest rates
many of us have ever seen and the administration's tax cuts mean higher incomes
for many consumers. The tax reductions on dividends and capital gains are of
special interest to investors. Corporations can also borrow at the lowest rates
in years. Many companies are realizing substantial savings by replacing old,
high-cost debt with new issues that carry lower interest. The Federal Reserve
Board cut rates once again in June in an effort to inject further stimulus into
the economy. And the weak U.S. dollar helps exporters and multinational
companies operating in countries with stronger currencies.

One possible lesson to be learned from the market's decline and recovery is the
importance of staying invested. Those who stayed with their commitments
benefitted from a stock market rally and a strong rise in corporate bonds, while
those who remained on the sidelines had to play catch-up. If the protracted
slump caused your investment discipline to slip, this may be an ideal time to
contact your financial advisor for guidance on resuming your investment program
and determining the right balance for you among stocks, bonds and short-term
investments.

Our style focuses on companies, not on forecasts

There are always risks, of course, and the direction of the economy is
something of a puzzle at the moment. If it continues to struggle for very long,
investors may once again seek shelter in short-term commitments. However,
Pioneer's portfolio managers and analysts do not base investment decisions on
economic assumptions. Instead, as it has since our founding in 1928, our
value-focused investment style requires complete understanding of a company and
its potential. That means intensive analysis of financial reports, visits to
companies and detailed discussions with corporate managers. When we discover
potential that appears to exceed the market's valuation, that company's stocks
and bonds may become candidates for investment. Our research efforts are aided
in no small measure by the global resources of our parent organization,
UniCredito Italiano, S.p.A.

Like everyone at Pioneer, I appreciate your continued confidence in our
products and services.

Respectfully,

/s/ Osbert Hood

Osbert Hood
Pioneer Investment Management, Inc.

The preceding information is the opinion of Fund management. Past performance
is no guarantee of future results, and there is no guarantee that market
forecasts discussed will be realized.

- --------------------------------------------------------------------------------
Pioneer's new president

Osbert Hood was recently named Chief Executive Officer and President of Pioneer
Investments USA. Mr. Hood, formerly Pioneer's Chief Operating Officer and a key
member of the senior management committee, joined Pioneer in 2000 from John
Hancock Financial Services, where he had held senior financial positions. "I am
excited and honored to have the opportunity to lead Pioneer as it continues to
grow," Mr. Hood said. "As CEO I look forward to furthering Pioneer's strategic
goals, including developing new products that can meet the wider needs of
investors and the advisers who serve them."
- --------------------------------------------------------------------------------


                                                                               1


Pioneer America Income Trust
PORTFOLIO SUMMARY 6/30/03

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

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

U.S. Government Agency Obligations   72.4%
U.S. Treasury Obligations            27.0%
Temporary Cash Investment             0.6%

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

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

0-1 Year                             23.2%
1-3 Years                            46.5%
3-4 Years                             4.0%
4-6 Years                            13.9%
8+ Years                             12.4%

10 Largest Holdings
- --------------------------------------------------------------------------------
(As a percentage of debt holdings)


                                                              
 1.    U.S. Treasury Bonds, 7.25%, 5/15/16                          9.34%
 2.    U.S. Treasury Notes, 6.5%, 2/15/10                           8.81
 3.    Government National Mortgage Association, 5.5%, 4/15/33      2.91
 4.    U.S. Treasury Bonds, 6.375%, 8/15/27                         2.70
 5.    U.S. Treasury Notes, 5.625%, 5/15/08                         2.21
 6.    Government National Mortgage Association, 6.0%, 11/15/32     2.07
 7.    Government National Mortgage Association, 6.5%, 9/15/32      1.93
 8.    U.S. Treasury Notes, 6.625%, 5/15/07                         1.93
 9.    U.S. Treasury Notes, 6.25%, 2/15/07                          1.75
10.    Government National Mortgage Association, 5.5%, 5/15/33      1.72


This list excludes money market instruments. Portfolio holdings will vary for
other periods.


2


Pioneer America Income Trust
PERFORMANCE UPDATE 6/30/03                                        CLASS A SHARES

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



Net Asset Value
per Share        6/30/03   12/31/02
                     
                 $10.27    $10.27



Distributions per Share   Income      Short-Term      Long-Term
(1/1/03 - 6/30/03)        Dividends   Capital Gains   Capital Gains
                                             
                          $0.1737          $--        $--


Investment Returns
- --------------------------------------------------------------------------------
The mountain chart on the right shows the change in value of a $10,000
investment made in Pioneer America Income Trust at public offering price,
compared to that of the Lehman Brothers Government Bond Index and of the Lehman
Brothers Fixed-Rate Mortgage-Backed Securities Index.



      Average Annual Total Returns
          (As of June 30, 2003)

          Net Asset           Public Offering
Period     Value                  Price*
                       
10 Years   5.81%                  5.33%
5 Years    6.06                    5.09
1 Year     7.28                    2.44


*     Reflects deduction of the maximum 4.5% sales charge at the beginning of
      the period and assumes reinvestment of distributions at net asset value.

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

                          Value of $10,000 Investment

                                        Lehman Brothers
                                          Fixed-Rate
                    Pioneer America     Mortgage-Backed       Lehman Brothers
                     Income Trust*      Securities Index   Government Bond Index

6/93                      9550               10000                10000
                          9797               10187                10290
6/94                      9408               10023                 9942
                         10919               11707                11765
6/96                     11169               12334                12090
                         12120               13504                13248
6/98                     13063               14445                14553
                         12733               14712                14227
6/00                     14207               16355                16111
                         15048               17699                17277
6/02                     16519               19246                19264
6/03                     16801               19552                19968

      Prior to May 1, 2003, the Fund's investment adviser, Pioneer Investment
      Management, Inc., reduced its management fee and certain other expenses,
      otherwise, returns would have been lower. Expense limitation for the
      Fund's Class A shares applies proportionately to Class B, C and R shares.

      The Lehman Brothers Government Bond Index is an unmanaged measure of the
      performance of U.S. Treasury debt, all publicly issued debt of U.S.
      government agencies and quasi-federal corporations, and corporate debt
      guaranteed by the U.S. government. The Lehman Brothers Fixed-Rate
      Mortgage-Backed Securities Index is an unmanaged index including 15- and
      30-year fixed rate securities backed by mortgage pools of the Government
      National Mortgage Association (GNMA), Federal Home Loan Mortgage
      Corporation (FHLMC) and Federal National Mortgage Association (FNMA).
      Index returns assume reinvestment of dividends and, unlike Fund returns,
      do not reflect any fees, expenses or sales charges. You cannot invest
      directly in the Indexes.

      The performance table and graph do not reflect the deduction of taxes that
      a shareowner would pay on Fund distributions or the redemption of Fund
      shares.

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


                                                                               3



Pioneer America Income Trust
PERFORMANCE UPDATE 6/30/03                                        CLASS B SHARES

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



Net Asset Value
per Share        6/30/03   12/31/02
                     
                 $10.19    $10.20



Distributions per Share   Income      Short-Term      Long-Term
(1/1/03 - 6/30/03)        Dividends   Capital Gains   Capital Gains
                                             
                          $0.1458          $--        $--


Investment Returns
- --------------------------------------------------------------------------------
The mountain chart on the right shows the change in value of a $10,000
investment made in Pioneer America Income Trust, compared to that of the Lehman
Brothers Government Bond Index and of the Lehman Brothers Fixed-Rate
Mortgage-Backed Securities Index.



      Average Annual Total Returns
         (As of June 30, 2003)

                  If          If
Period           Held      Redeemed*
                     
Life-of-Class
(4/29/94)        5.69%       5.69%
5 Years          5.22        5.05
1 Year           6.38        2.38


*     Reflects deduction of the maximum applicable contingent deferred sales
      charge (CDSC) at the end of the period and assumes reinvestment of
      distributions. The maximum CDSC of 4% declines over six years.

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

                          Value of $10,000 Investment

                                        Lehman Brothers
                                          Fixed-Rate
                    Pioneer America     Mortgage-Backed       Lehman Brothers
                     Income Trust*      Securities Index   Government Bond Index

4/94                     10000               10000                 10000
                          9943               10149                 10041
12/95                    11442               11853                 11883
                         11624               12488                 12211
12/97                    12508               13673                 13381
                         13394               14625                 14699
12/99                    12960               14896                 14369
                         14344               16559                 16272
12/01                    15060               17920                 17450
                         16388               19487                 19457
6/03                     16608               19796                 20166

      Prior to May 1, 2003, the Fund's investment adviser, Pioneer Investment
      Management, Inc., reduced its management fee and certain other expenses,
      otherwise, returns would have been lower. Expense limitation for the
      Fund's Class A shares applies proportionately to Class B, C and R shares.

+     Index comparisons begin 4/30/94. The Lehman Brothers Government Bond Index
      is an unmanaged measure of the performance of U.S. Treasury debt, all
      publicly issued debt of U.S. government agencies and quasi-federal
      corporations, and corporate debt guaranteed by the U.S. government. The
      Lehman Brothers Fixed-Rate Mortgage-Backed Securities Index is an
      unmanaged index including 15- and 30-year fixed rate securities backed by
      mortgage pools of the Government National Mortgage Association (GNMA),
      Federal Home Loan Mortgage Corporation (FHLMC) and Federal National
      Mortgage Association (FNMA). Index returns assume reinvestment of
      dividends and, unlike Fund returns, do not reflect any fees, expenses or
      sales charges. You cannot invest directly in the Indexes.

      The performance table and graph do not reflect the deduction of taxes that
      a shareowner would pay on Fund distributions or the redemption of Fund
      shares.

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


4



Pioneer America Income Trust
PERFORMANCE UPDATE 6/30/03                                        CLASS C SHARES

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



Net Asset Value
per Share        6/30/03   12/31/02
                     
                 $10.22    $10.24



Distributions per Share   Income      Short-Term      Long-Term
(1/1/03 - 6/30/03)        Dividends   Capital Gains   Capital Gains
                                             
                          $0.1543          $--        $--


Investment Returns
- --------------------------------------------------------------------------------
The mountain chart on the right shows the change in value of a $10,000
investment made in Pioneer America Income Trust at public offering price,
compared to that of the Lehman Brothers Government Bond Index and of the Lehman
Brothers Fixed-Rate Mortgage-Backed Securities Index.



         Average Annual Total Returns
             (As of June 30, 2003)

               Net Asset    Public Offering
Period           Value        Price/CDSC*
                      
Life-of-Class
(1/31/96)        5.11%           4.97%
5 Years          5.26            5.05
1 Year           6.37            5.31


*     Reflects deduction of the 1% sales charge at the beginning of the period
      and assumes reinvestment of distributions. The 1% contingent deferred
      sales charge (CDSC) applies to investments made within one year of
      purchase.

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

                          Value of $10,000 Investment

                                                                Lehman Brothers
                                                                   Fixed-Rate
                    Pioneer America       Lehman Brothers       Mortgage-Backed
                     Income Trust*     Government Bond Index    Securities Index

1/96                      9900                10000                  10000
                         10005                10457                  10214
6/97                     10784                11449                  11192
                         11549                12247                  12295
6/99                     11181                12473                  12019
                         12357                13866                  13611
6/01                     12981                15006                  14596
                         14140                16317                  16274
6/03                     14327                16577                  16867
                         16388                19487                  19457

      Prior to May 1, 2003, the Fund's investment adviser, Pioneer Investment
      Management, Inc., reduced its management fee and certain other expenses,
      otherwise, returns would have been lower. Expense limitation for the
      Fund's Class A shares applies proportionately to Class B, C and R shares.

      The Lehman Brothers Government Bond Index is an unmanaged measure of the
      performance of U.S. Treasury debt, all publicly issued debt of U.S.
      government agencies and quasi-federal corporations, and corporate debt
      guaranteed by the U.S. government. The Lehman Brothers Fixed-Rate
      Mortgage-Backed Securities Index is an unmanaged index including 15- and
      30-year fixed rate securities backed by mortgage pools of the Government
      National Mortgage Association (GNMA), Federal Home Loan Mortgage
      Corporation (FHLMC) and Federal National Mortgage Association (FNMA).
      Index returns assume reinvestment of dividends and, unlike Fund returns,
      do not reflect any fees, expenses or sales charges. You cannot invest
      directly in the Indexes.

      The performance table and graph do not reflect the deduction of taxes that
      a shareowner would pay on Fund distributions or the redemption of Fund
      shares.

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


                                                                               5


Pioneer America Income Trust
PERFORMANCE UPDATE 6/30/03                                        CLASS R SHARES

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



Net Asset Value
per Share        6/30/03   4/1/03
                     
                 $10.32    $10.31



Distributions per Share   Income      Short-Term      Long-Term
(4/1/03 - 6/30/03)        Dividends   Capital Gains   Capital Gains
                                             
                          $0.0500          $--        $--


Investment Returns
- --------------------------------------------------------------------------------
The mountain chart on the right shows the change in value of a $10,000
investment made in Pioneer America Income Trust at public offering price,
compared to that of the Lehman Brothers Government Bond Index and of the Lehman
Brothers Fixed-Rate Mortgage-Backed Securities Index.



      Average Annual Total Returns+
          (As of June 30, 2003)

          Net Asset    Public Offering
Period      Value          Price*
                 
 10 Years   5.71%          5.71%
 5 Years    6.12           6.12
 1 Year     7.59           6.59



*     Reflects deduction of 1% CDSC. Shares sold within 18 months of purchase
      may be subject to CDSC.

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

                          Value of $10,000 Investment

                                         Lehman Brothers
                                           Fixed-Rate
                    Pioneer America      Mortgage-Backed      Lehman Brothers
                     Income Trust*      Securities Index   Government Bond Index

Jun-93                   10000                10000               10000
                         10335                10187               10290
Dec-94                   10017                10023                9942
                         11524                11707               11765
Dec-96                   11742                12334               12090
                         12563                13504               13248
Dec-98                   13551                14445               14553
                         12998                14712               14227
Dec-00                   14606                16355               16111
                         15528                17699               17277
 2-Dec                   17102                19246               19264
 3-Jun                   17428                19552               19968

+     Class R shares have no front-end load, may be subject to a back-end load
      and are available to certain retirement plans. The performance of Class R
      shares for the period prior to the commencement of operations of Class R
      shares on April 1, 2003 is based on the performance of Class A shares,
      reduced to reflect the higher distribution and service fees of Class R
      shares. You do not pay a sales charge on purchases of Class R shares, but
      will pay a CDSC if you sell your shares within 18 months of purchase,
      unless you qualify for a waiver.

      Prior to May 1, 2003, the Fund's investment adviser, Pioneer Investment
      Management, Inc., reduced its management fee and certain other expenses,
      otherwise, returns would have been lower. Expense limitation for the
      Fund's Class A shares applies proportionately to Class B, C and R shares.

      The Lehman Brothers Government Bond Index is an unmanaged measure of the
      performance of U.S. Treasury debt, all publicly issued debt of U.S.
      government agencies and quasi-federal corporations, and corporate debt
      guaranteed by the U.S. government. The Lehman Brothers Fixed-Rate
      Mortgage-Backed Securities Index is an unmanaged index including 15- and
      30-year fixed rate securities backed by mortgage pools of the Government
      National Mortgage Association (GNMA), Federal Home Loan Mortgage
      Corporation (FHLMC) and Federal National Mortgage Association (FNMA).
      Index returns assume reinvestment of dividends and, unlike Fund returns,
      do not reflect any fees, expenses or sales charges. You cannot invest
      directly in the Indexes.

      Past performance does not guarantee future results. Return and principal
      value fluctuate, and your shares, when redeemed, may be worth more or less
      than their original cost. The performance table and graph do not reflect
      the deduction of taxes that a shareowner would pay on Fund distributions
      or redemption of Fund shares.


6



Pioneer America Income Trust
PORTFOLIO MANAGEMENT DISCUSSION 6/30/03

A struggling economy, the war in Iraq and concerns about deflation on the part
of the Federal Reserve caused market participants to seek the highest quality
investments during the first half of the fiscal year for Pioneer America Income
Trust. As a result, long-term Treasury bonds were among the best performing
asset classes. Richard Schlanger, a member of the Pioneer fixed-income team,
discusses the factors that had an impact on the fixed-income market and your
Fund during the six-month period ended June 30, 2003.

Q:    How did the Fund perform over the six months ended June 30, 2003?

A:    For the period, Class A shares of Pioneer America Income Trust produced a
      total return of 1.70% at net asset value. In comparison, the Lehman
      Brothers Government Bond Fund Index returned 3.63%. The Fund's
      underweighting in Treasury securities and its short duration were mainly
      responsible for its underperformance relative to this Index. (Expressed in
      years, duration measures a bond's price sensitivity to changes in interest
      rates. A shorter duration is usually advantageous when interest rates
      rise, a longer duration benefits a fund when interest rates decline.) The
      Lehman Brothers Fixed-Rate Mortgage-Backed Securities Index returned
      1.59%. Because we emphasized mortgage-backed securities, we were able to
      provide an attractive level of income to shareholders while maintaining
      the highest credit quality of AAA. (Quality ratings apply to underlying
      portfolio securities, not Fund shares). At period end, the 30-day SEC
      yield for Class A shares was 2.40%.*

Q:    What was the investment environment like during the period?

A:    Uncertainty dominated investor sentiment for most of the period. Global
      economic growth was weak, and Federal Reserve Chairman Alan Greenspan
      raised the issue of deflation, which is a reduction in wholesale and
      consumer prices that usually lasts for several months or years. A
      deflationary environment could be negative because as prices decline,
      corporate profits may fall, causing unemployment to rise and a weak
      economy overall. In this uncertain economic climate, investors sought the
      relative safety of long--

*30-day SEC yield on 6/30/03 reflects the waiver of certain expenses; without
 the waiver the yield would have been 2.35%.


                                                                               7


Pioneer America Income Trust
PORTFOLIO MANAGEMENT DISCUSSION 6/30/03                            (continued)

      term Treasury securities. The increased demand for Treasuries pushed
      prices up and yields down to 45-year lows. By mid-June, yields on 5-year
      Treasuries were just over 2.0%, and yields on 10-year Treasuries were a
      little over 3.0%. On June 25, 2003, the Fed trimmed the federal funds rate
      by 0.25%, adding more stimulus to the lackluster economy. (The federal
      funds rate is the rate of interest that commercial banks charge each other
      for overnight loans.) Despite the Fed's action, market interest rates rose
      slightly, as the stock market rallied and investors looked forward to a
      better economy during the second half of 2003.

      Because mortgage rates are pegged to Treasury indexes, there is a
      correlation between declines in Treasury yields and mortgage refinancing
      activity. As yields on Treasury securities fell for most of the period,
      homeowners refinanced their mortgages in record numbers. The Mortgage
      Banker Association of America's Refinancing Index rose to about 10,000; in
      2002 it was at 6,500. The refinancing boom provided consumers with extra
      money to spend. As a result, consumer spending was one of the few bright
      spots in the economy and was largely responsible for the positive, if
      muted, economic growth over the period.

Q:    What strategies did you use in managing the Fund?

A:    We reduced the Fund's position in mortgage-backed securities issued by the
      Government National Mortgage Association (GNMA) from 75.7% to 72.4%. Like
      U.S. Treasury securities, GNMAs are backed by the full faith and credit of
      the U.S. government. (A full faith and credit backing applies to
      underlying portfolio securities, not Fund shares.) We used the proceeds
      from the sale of the mortgages to invest in Treasury securities with
      maturities of four to ten years. We were reluctant to make a big
      commitment to long-term Treasury securities because we were concerned that
      with the growing federal budget deficit Treasury yields are likely to rise
      and prices decline in the near future. We also disagreed with the Fed
      about the possibility of deflation. Gold prices rose above $340 an ounce
      and other commodity prices were at relatively high levels during the six
      months. In addition, the yield curve remained


8


Pioneer America Income Trust

      extremely steep as a result of the Fed's interest-rate cuts. We believe
      higher commodity prices and the Fed's determination to keep interest rates
      low over the near term are more indicative of a recovering economy than a
      deflationary environment. (The yield curve shows the relationship between
      bond yields and maturity lengths. When the yield curve steepens, or slopes
      upward, yields on short-term bonds are lower than yields on long-term
      bonds. An upward sloping yield curve, often referred to as a positive
      yield curve, demonstrates the more typical relationship between bond
      yields and maturity lengths.)

      The Fund's large allocation to mortgage-backed securities held back
      performance for two main reasons. First, investors preferred Treasury
      securities in an uncertain economic climate. Second, investors were
      concerned about the "prepayment risk" that can affect mortgages.
      Prepayment risk, the risk that income investors receive from
      mortgage-backed securities, will decline as homeowners "prepay" their
      mortgages and refinance them at lower rates.

      To mitigate the effects of prepayment risk, we purchased mortgage
      securities with coupons in the 5.5% to 6.0% range. We sought pools of
      mortgages grouped either by states, where mortgages tend to be prepaid at
      a slower pace, or by issuers that were slow to promote refinancing and to
      originate new mortgages. We also bought low loan-balance mortgages and
      newly created mortgages, with the expectation that homeowners would be
      more reluctant to undertake the refinancing process if they had recently
      refinanced. We also sold some of the Fund's higher-coupon mortgages that
      were prepaying quickly.

Q:    What is your outlook for the coming months?

A:    There is a great deal of stimulus in the economy. Interest rates are at
      40-year lows, the Fed has signaled that it will continue its accommodative
      monetary policy and may trim interest rates again over the next few
      months, and new tax cuts should put more money in the pockets of
      consumers. These factors should be positive for the economy over the next
      several quarters. We believe the Fund is


                                                                               9


Pioneer America Income Trust
PORTFOLIO MANAGEMENT DISCUSSION 6/30/03                            (continued)

      positioned to perform well in this environment, as we expect
      mortgage-backed securities to outperform Treasuries. Our duration of 2.85
      years should ease concerns about future performance when and if the Fed
      raises interest rates. We believe the Fund continues to be appropriate for
      people seeking an AAA-quality investment and relatively high income in a
      low interest-rate environment.

      The preceding information is the opinion of Fund management. Past
      performance is no guarantee of future results, and there is no guarantee
      that market forecasts discussed will be realized.


10


Pioneer America Income Trust
SCHEDULE OF INVESTMENTS 6/30/03 (unaudited)


Principal
 Amount                                                                Value
                                                          
                 U.S. TREASURY OBLIGATIONS - 27.0%
$ 1,000,000      U.S. Treasury Bonds, 6.25%, 8/15/23            $  1,224,922
 21,270,000      U.S. Treasury Bonds, 7.25%, 5/15/16              28,287,441
  5,850,000      U.S. Treasury Notes, 5.625%, 5/15/08              6,706,475
  4,600,000      U.S. Treasury Notes, 6.25%, 2/15/07               5,290,000
  6,525,000      U.S. Treasury Notes, 6.375%, 8/15/27              8,173,835
 22,000,000      U.S. Treasury Notes, 6.5%, 2/15/10               26,689,608
  5,000,000      U.S. Treasury Notes, 6.625%, 5/15/07              5,849,610
                                                                ------------
                 TOTAL U.S. TREASURY OBLIGATIONS
                 (Cost $78,522,023)                             $ 82,221,891
                                                                ------------
                 U.S. GOVERNMENT AGENCY OBLIGATIONS - 72.4%
 14,694,816      Government National Mortgage Association,
                  5.5%, 1/15/29 - 5/15/33                         15,339,987
    500,000      Government National Mortgage Association,
                  5.5%, TBA 15 YRS                                   525,625
 80,565,300      Government National Mortgage Association,
                  6.0%, 1/15/24 - 4/15/33                         84,590,629
 59,969,271      Government National Mortgage Association,
                  6.5%, 4/15/17 - 9/15/32                         63,022,814
 17,081,979      Government National Mortgage Association,
                  7.0%, 10/15/16 - 4/15/32                        18,082,044
  5,564,669      Government National Mortgage Association,
                  7.5%, 2/15/27 - 11/15/32                         5,913,900
    155,323      Government National Mortgage Association,
                  8.5%, 7/15/24                                      169,735
     45,251      Government National Mortgage Association,
                  9.0%, 9/15/16 - 4/15/20                             50,442
      3,324      Government National Mortgage Association,
                  9.5%, 12/15/03                                       3,377
    140,929      Government National Mortgage Association,
                  10.0%, 11/15/18 - 1/15/19                          162,281
        157      Government National Mortgage Association,
                  10.5%, 8/15/03                                         160
  1,591,399      Government National Mortgage Association I,
                  6.0%, 2/15/29                                    1,668,980
  5,260,757      Government National Mortgage Association I,
                  6.5%, 11/15/31 - 9/15/32                         5,524,081


The accompanying notes are an integral part of these financial statements.    11


Pioneer America Income Trust
SCHEDULE OF INVESTMENTS 6/30/03 (unaudited)                        (continued)



Principal
  Amount                                                                     Value
                                                               
                 U.S. GOVERNMENT AGENCY OBLIGATIONS (continued)
$ 3,473,877      Government National Mortgage Association I,
                  7.0%, 8/15/23 - 4/15/31                            $  3,674,425
  2,250,863      Government National Mortgage Association I,
                  7.5%, 8/15/29 - 3/15/31                               2,392,486
     87,841      Government National Mortgage Association I,
                  10.0%, 3/15/20                                          101,172
  6,432,929      Government National Mortgage Association II,
                  6.0%, 7/20/17 - 3/20/33                               6,710,258
  8,787,630      Government National Mortgage Association II,
                  6.5%, 8/20/28 - 10/20/32                              9,183,848
  1,967,321      Government National Mortgage Association II,
                  7.0%, 12/20/08 - 11/20/31                             2,071,376
    414,574      Government National Mortgage Association II,
                  7.49%, 10/20/22                                         441,437
    413,598      Government National Mortgage Association II,
                  7.5%, 6/20/30 - 12/20/30                                437,015
     22,975      Government National Mortgage Association II,
                  8.0%, 5/20/25 - 3/20/30                                  24,576
    449,733      Government National Mortgage Association II,
                  9.0%, 9/20/21 - 11/20/24                                498,526
      7,253      Government National Mortgage Association II,
                  10.0%, 1/20/06                                            7,869
                                                                     ------------
                 TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS
                 (Cost $216,836,097)                                 $220,597,043
                                                                     ------------
                 TEMPORARY CASH INVESTMENT - 0.6%
                 Repurchase Agreement - 0.6%
$ 1,900,000      Bear Stearns & Co., Inc., 1.08%, dated 6/30/03,
                 repurchase price of $1,900,000 plus accrued
                 interest on 7/1/03, collateralized by $2,128,000
                 U.S. Treasury Bonds, 11.875%, 11/15/03              $  1,900,000
                                                                     ------------
                 TOTAL TEMPORARY CASH INVESTMENT
                 (Cost $1,900,000)                                   $  1,900,000
                                                                     ------------
                 TOTAL INVESTMENT IN SECURITIES - 100.0%
                 (Cost $297,258,120)(a)(b)(c)                        $304,718,934
                                                                     ============


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


Pioneer America Income Trust


                                                                  
Note:   The Trust's investments in mortgage-backed securities of the Government
        National Mortgage Association (GNMA) are interests in separate pools of
        mortgages. All separate investments in this issuer which have the same
        coupon rate have been aggregated for the purpose of presentation in this
        schedule of investments.

(a)     At June 30, 2003, the net unrealized gain on investments based on cost
        for federal income tax purposes of $297,736,140 was as follows:

        Aggregate gross unrealized gain for all investments
        in which there is an excess of value over tax cost            $7,534,519

        Aggregate gross unrealized loss for all investments
        in which there is an excess of tax cost over value              (551,725)
                                                                      ----------

        Net unrealized gain                                           $6,982,794
                                                                      ==========

(b)     At December 31, 2002, the Trust had a net capital loss carryforward of
        $5,930,850 which will expire between 2003 and 2009 if not utilized.

(c)     TBA (To Be Assigned) securities are purchased on a forward commitment
        basis with an approximate (generally plus/minus 2.5%) principal and no
        definite maturity date period. The actual principal amount and maturity
        date will be determined upon settlement when the specific mortgage pools
        are assigned.

Purchases and sales of securities (excluding temporary cash investments) for the
six months ended June 30, 2003 aggregated $138,931,747 and $100,362,444,
respectively.


The accompanying notes are an integral part of these financial statements.    13


Pioneer America Income Trust
BALANCE SHEET 6/30/03 (unaudited)


                                                          
ASSETS:
  Investment in securities, at value (cost $297,258,120)      $304,718,934
  Cash                                                              55,601
  Receivables -
   Fund shares sold                                              1,412,511
   Interest                                                      2,206,855
  Due from Pioneer Investment Management, Inc.                      25,912
  Other                                                                478
                                                              ------------
   Total assets                                               $308,420,291
                                                              ------------

LIABILITIES:
  Payables -
   Investment securities purchased                            $    527,160
   Fund shares repurchased                                       1,457,373
   Dividends                                                       189,627
  Due to affiliates                                                361,828
  Accrued expenses                                                  43,208
                                                              ------------
   Total liabilities                                          $  2,579,196
                                                              ------------
NET ASSETS:
  Paid-in capital                                             $304,371,413
  Distributions in excess of net investment income              (1,271,412)
  Accumulated net realized loss on investments                  (4,719,720)
  Net unrealized gain on investments                             7,460,814
                                                              ------------
   Total net assets                                           $305,841,095
                                                              ============
NET ASSET VALUE PER SHARE:
(Unlimited number of shares authorized)
  Class A (based on $183,961,363/17,913,304 shares)           $      10.27
                                                              ============
  Class B (based on $72,686,993/7,131,044 shares)             $      10.19
                                                              ============
  Class C (based on $49,192,236/4,811,888 shares)             $      10.22
                                                              ============
  Class R (based on $502.59/48.690 shares)                    $      10.32
                                                              ============
MAXIMUM OFFERING PRICE:
  Class A (10.27 [divided by] 95.5%)                          $      10.75
                                                              ============
  Class C (10.22 [divided by] 99.0%)                          $      10.32
                                                              ============



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



Pioneer America Income Trust
STATEMENT OF OPERATIONS (unaudited)
For the Six Months Ended 6/30/03


                                                                      
INVESTMENT INCOME:
  Interest                                                                   $6,192,817
                                                                             ----------
EXPENSES:
  Management fees                                             $741,264
  Transfer agent fees
     Class A                                                   233,300
     Class B                                                   116,431
     Class C                                                    50,114
  Distribution fees
     Class A                                                   222,412
     Class B                                                   363,719
     Class C                                                   229,161
     Class R                                                         1
  Administrative fees                                           18,596
  Custodian fees                                                12,903
  Registration fees                                             66,541
  Professional fees                                             19,869
  Printing                                                      17,846
  Fees and expenses of nonaffiliated trustees                    6,053
  Miscellaneous                                                  8,484
                                                              --------
       Total expenses                                                        $2,106,694
       Less management fees waived by Pioneer Investment
         Management, Inc.                                                       (56,849)
       Less fees paid indirectly                                                 (4,150)
                                                                             ----------
       Net expenses                                                          $2,045,695
                                                                             ----------
         Net investment income                                               $4,147,122
                                                                             ----------
REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS:
  Net realized gain on investments                                           $1,254,660
  Change in net unrealized gain on investments                                 (780,929)
                                                                             ----------
     Net gain on investments                                                 $  473,731
                                                                             ----------
     Net increase in net assets resulting from operations                    $4,620,853
                                                                             ==========


The accompanying notes are an integral part of these financial statements.    15


Pioneer America Income Trust
STATEMENTS OF CHANGES IN NET ASSETS
For the Six Months Ended 6/30/03 and the Year Ended 12/31/02



                                                          Six Months
                                                             Ended
                                                            6/30/03       Year Ended
                                                          (unaudited)      12/31/02
                                                                   
FROM OPERATIONS:
Net investment income                                    $   4,147,122   $   7,927,673
Net realized gain on investments                             1,254,660       2,653,295
Change in net unrealized gain (loss) on investments           (780,929)      7,089,108
                                                         -------------   -------------
  Net increase in net assets resulting from
     operations                                          $   4,620,853   $  17,670,076
                                                         -------------   -------------
DISTRIBUTIONS TO SHAREOWNERS:
Net investment income:
  Class A ($0.17 and $0.46 per share, respectively)      $  (3,023,870)  $  (6,432,080)
  Class B ($0.15 and $0.40 per share, respectively)         (1,044,261)     (1,706,698)
  Class C ($0.15 and $0.41 per share, respectively)           (686,181)       (742,031)
  Class R ($0.05 and $0.00 per share, respectively)                 (4)             --
                                                         -------------   -------------
     Total distributions to shareowners                  $  (4,754,316)  $  (8,880,809)
                                                         -------------   -------------
FROM FUND SHARE TRANSACTIONS:
Net proceeds from sale of shares                         $ 134,747,982   $ 269,788,820
Reinvestment of distributions                                3,431,177       5,959,317
Cost of shares repurchased                                (101,869,416)   (162,654,384)
                                                         -------------   -------------
  Net increase in net assets resulting from fund
     share transactions                                  $  36,309,743   $ 113,093,753
                                                         -------------   -------------
  Net increase in net assets                             $  36,176,280   $ 121,883,020
NET ASSETS:
Beginning of period                                        269,664,815     147,781,795
                                                         -------------   -------------
End of period (including distributions in excess of
  net investment income of $1,271,412 and
  $664,218, respectively)                                $ 305,841,095   $ 269,664,815
                                                         =============   =============



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



Pioneer America Income Trust
STATEMENTS OF CHANGES IN NET ASSETS                                (continued)
For the Six Months Ended 6/30/03 and the Year Ended 12/31/02



                                     '03 Shares     '03 Amount
                                     (unaudited)    (unaudited)        '02 Shares         '02 Amount
                                                                              
CLASS A
Shares sold                           8,060,349     $82,669,388         15,405,939        $154,956,084
Reinvestment of distributions           222,306       2,283,713            436,057           4,379,711
Less shares repurchased              (6,379,607)    (65,383,256)       (11,679,409)       (117,323,851)
                                     ----------     -----------        -----------        ------------
  Net increase                        1,903,048     $19,569,845          4,162,587        $ 42,011,944
                                     ==========     ===========        ===========        ============
CLASS B
Shares sold                           2,253,485     $22,951,539          6,647,016        $ 66,814,094
Reinvestment of distributions            69,019         703,844            111,513           1,118,949
Less shares repurchased              (1,758,390)    (17,911,128)        (2,754,820)        (27,651,793)
                                     ----------     -----------        -----------        ------------
  Net increase                          564,114     $ 5,744,255          4,003,709        $ 40,281,250
                                     ==========     ===========        ===========        ============
CLASS C
Shares sold                           2,851,247     $29,126,553          4,757,424        $ 48,018,642
Reinvestment of distributions            43,373         443,620             45,549             460,657
Less shares repurchased              (1,819,305)    (18,575,032)        (1,758,281)        (17,678,740)
                                     ----------     -----------        -----------        ------------
  Net increase                        1,075,315     $10,995,141          3,044,692        $ 30,800,559
                                     ==========     ===========        ===========        ============
CLASS R*
Shares sold                                  49     $       502
Reinvestment of distributions                --              --
Less shares repurchased                      --              --
                                     ----------     -----------
  Net increase                               49     $       502
                                     ==========     ===========


*     Shares of Class R were first publicly offered on April 1, 2003.

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



Pioneer America Income Trust
FINANCIAL HIGHLIGHTS



                                                        Six Months
                                                          Ended
                                                         6/30/03      Year Ended  Year Ended   Year Ended  Year Ended  Year Ended
                                                       (unaudited)     12/31/02   12/31/01(a)  12/31/00     12/31/99    12/31/98
                                                                                                     
CLASS A
Net asset value, beginning of period                    $   10.27      $    9.79   $    9.76   $    9.30   $   10.10   $    9.93
                                                        ---------      ---------   ---------   ---------   ---------   ---------
Increase (decrease) from investment operations:
 Net investment income                                  $    0.16      $    0.40   $    0.52   $    0.58   $    0.55   $    0.58
 Net realized and unrealized gain (loss) on investments      0.01           0.54        0.05        0.46       (0.80)       0.17
                                                        ---------      ---------   ---------   ---------   ---------   ---------
   Net increase (decrease) from investment operations   $    0.17      $    0.94   $    0.57   $    1.04   $   (0.25)  $    0.75
Distributions to shareowners:
 Net investment income                                      (0.17)         (0.46)      (0.51)      (0.58)      (0.55)      (0.58)
 In excess of net investment income                            --             --       (0.03)         --          --          --
                                                        ---------      ---------   ---------   ---------   ---------   ---------
Net increase (decrease) in net asset value              $      --      $    0.48   $    0.03   $    0.46   $   (0.80)  $    0.17
                                                        ---------      ---------   ---------   ---------   ---------   ---------
Net asset value, end of period                          $   10.27      $   10.27   $    9.79   $    9.76   $    9.30   $   10.10
                                                        =========      =========   =========   =========   =========   =========
Total return*                                                1.70%          9.78%       5.92%      11.58%      (2.52)%      7.78%
Ratio of net expenses to average net assets+                 1.07%**        1.00%       1.01%       1.04%       1.01%       1.00%
Ratio of net investment income to average net assets+        3.37%**        4.17%       5.14%       6.09%       5.63%       5.80%
Portfolio turnover rate                                        69%**          76%         72%         56%         72%         81%
Net assets, end of period (in thousands)                $ 183,961      $ 164,393   $ 115,998   $  96,068   $ 111,262   $ 128,925
Ratios with no waiver of management fees by
 PIM and no reduction for fees paid indirectly:
   Net expenses                                              1.11%**        1.08%       1.12%       1.16%       1.14%       1.10%
   Net investment income                                     3.33%**        4.09%       5.03%       5.97%       5.50%       5.70%
Ratios with waiver of management fees by
 PIM and reduction for fees paid indirectly:
   Net expenses                                              1.07%**        1.00%       1.00%       1.00%       1.00%       1.00%
   Net investment income                                     3.37%**        4.18%       5.15%       6.13%       5.64%       5.80%



*     Assumes initial investment at net asset value at the beginning of each
      period, reinvestment of all 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.
+     Ratios with no reduction for fees paid indirectly.
**    Annualized.
(a)   On January 1, 2001, the Trust began accreting discounts and amortizing
      premiums on debt securities. The effect of this change for the year ended
      December 31, 2001, was to decrease net investment income by $0.02 per
      share, increase net realized and unrealized gain (loss) by $0.02 per share
      and decrease the ratio of net investment income to average net assets
      assuming waiver of management fees by PIM and reduction for fees paid
      indirectly from 5.35% to 5.15%. Per share ratios and supplemental data for
      periods prior to January 1, 2001, have not been restated to reflect this
      change in presentation.

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



Pioneer America Income Trust
FINANCIAL HIGHLIGHTS



                                                        Six Months
                                                          Ended
                                                          6/30/03      Year Ended  Year Ended  Year Ended  Year Ended  Year Ended
                                                        (unaudited)     12/31/02   12/31/01(a)  12/31/00    12/31/99    12/31/98
                                                                                                     
CLASS B
Net asset value, beginning of period                    $   10.20      $    9.76   $    9.74   $    9.28   $   10.07   $    9.90
                                                        ---------      ---------   ---------   ---------   ---------   ---------
Increase (decrease) from investment operations:
 Net investment income                                  $    0.12      $    0.34   $    0.44   $    0.50   $    0.47   $    0.51
 Net realized and unrealized gain (loss) on investments      0.02           0.50        0.04        0.46       (0.79)       0.17
                                                        ---------      ---------   ---------   ---------   ---------   ---------
   Net increase (decrease) from investment operations   $    0.14      $    0.84   $    0.48   $    0.96   $   (0.32)  $    0.68
Distributions to shareowners:
 Net investment income                                      (0.15)         (0.40)      (0.42)      (0.50)      (0.47)      (0.51)
 In excess of net investment income                            --             --       (0.04)         --          --          --
                                                        ---------      ---------   ---------   ---------   ---------   ---------
Net increase (decrease) in net asset value              $   (0.01)     $    0.44   $    0.02   $    0.46   $   (0.79)  $    0.17
                                                        ---------      ---------   ---------   ---------   ---------   ---------
Net asset value, end of period                          $   10.19      $   10.20   $    9.76   $    9.74   $    9.28   $   10.07
                                                        =========      =========   =========   =========   =========   =========
Total return*                                                1.34%          8.82%       4.99%      10.68%      (3.24)%      7.08%
Ratio of net expenses to average net assets+                 1.88%**        1.80%       1.95%       1.85%       1.78%       1.74%
Ratio of net investment income to average net assets+        2.57%**        3.26%       4.18%       5.29%       4.87%       4.99%
Portfolio turnover rate                                        69%**          76%         72%         56%         72%         81%
Net assets, end of period (in thousands)                $  72,687      $  67,013   $  25,008   $  16,889   $  19,695      22,602
Ratios with no waiver of management fees by
 PIM and no reduction for fees paid indirectly:
   Net expenses                                              1.92%**        1.88%       2.06%       1.98%       1.91%       1.81%
   Net investment income                                     2.53%**        3.19%       4.07%       5.16%       4.74%       4.92%
Ratios with waiver of management fees by
 PIM and reduction for fees paid indirectly:
   Net expenses                                              1.88%**        1.79%       1.93%       1.83%       1.76%       1.71%
   Net investment income                                     2.57%**        3.27%       4.20%       5.31%       4.89%       5.01%


*     Assumes initial investment at net asset value at the beginning of each
      period, reinvestment of all 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.
+     Ratios with no reduction for fees paid indirectly.
**    Annualized.
(a)   On January 1, 2001, the Trust began accreting discounts and amortizing
      premiums on debt securities. The effect of this change for the year ended
      December 31, 2001, was to decrease net investment income by $0.02 per
      share, increase net realized and unrealized gain (loss) by $0.02 per share
      and decrease the ratio of net investment income to average net assets
      assuming waiver of management fees by PIM and reduction for fees paid
      indirectly from 4.36% to 4.20%. Per share ratios and supplemental data for
      periods prior to January 1, 2001, have not been restated to reflect this
      change in presentation.

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



Pioneer America Income Trust
FINANCIAL HIGHLIGHTS



                                                        Six Months
                                                          Ended
                                                         6/30/03      Year Ended  Year Ended  Year Ended  Year Ended  Year Ended
                                                       (unaudited)     12/31/02   12/31/01(a)  12/31/00    12/31/99    12/31/98
                                                                                                     
CLASS C
Net asset value, beginning of period                    $   10.24      $    9.79   $    9.74   $    9.28   $   10.07   $    9.90
                                                        ---------      ---------   ---------   ---------   ---------   ---------
Increase (decrease) from investment operations:
 Net investment income                                  $    0.12      $    0.36   $    0.46   $    0.49   $    0.47   $    0.52
 Net realized and unrealized gain (loss) on investments      0.01           0.50        0.03        0.46       (0.79)       0.17
                                                        ---------      ---------   ---------   ---------   ---------   ---------
   Net increase (decrease) from investment operations   $    0.13      $    0.86   $    0.49   $    0.95   $   (0.32)  $    0.69
Distributions to shareowners:
 Net investment income                                      (0.15)         (0.41)      (0.43)      (0.49)      (0.47)      (0.52)
 In excess of net investment income                            --             --       (0.01)         --          --          --
                                                        ---------      ---------   ---------   ---------   ---------   ---------
Net increase (decrease) in net asset value              $   (0.02)     $    0.45   $    0.05   $    0.46   $   (0.79)  $    0.17
                                                        ---------      ---------   ---------   ---------   ---------   ---------
Net asset value, end of period                          $   10.22      $   10.24   $    9.79   $    9.74   $    9.28   $   10.07
                                                        =========      =========   =========   =========   =========   =========
Total return*                                                1.32%          8.93%       5.05%      10.52%      (3.19)%      7.09%
Ratio of net expenses to average net assets+                 1.78%**        1.77%       1.84%       2.02%       1.73%       1.65%
Ratio of net investment income to average net assets+        2.66%**        3.16%       4.22%       5.14%       4.88%       4.97%
Portfolio turnover rate                                        69%**          76%         72%         56%         72%         81%
Net assets, end of period (in thousands)                $  49,192      $  38,258   $   6,776   $   3,221   $   5,632   $  11,891
Ratios with no waiver of management fees by
 PIM and no reduction for fees paid indirectly:
   Net expenses                                              1.82%**        1.84%       1.95%       2.15%       1.85%       1.70%
   Net investment income                                     2.62%**        3.08%       4.11%       5.01%       4.76%       4.92%
Ratios with waiver of management fees by
 PIM and reduction for fees paid indirectly:
   Net expenses                                              1.78%**        1.76%       1.81%       1.97%       1.70%       1.62%
   Net investment income                                     2.66%**        3.16%       4.25%       5.19%       4.91%       5.00%


*     Assumes initial investment at net asset value at the beginning of each
      period, reinvestment of all 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.
+     Ratios with no reduction for fees paid indirectly.
**    Annualized.
(a)   On January 1, 2001, the Trust began accreting discounts and amortizing
      premiums on debt securities. The effect of this change for the year ended
      December 31, 2001, was to decrease net investment income by $0.01 per
      share, increase net realized and unrealized gain (loss) by $0.01 per share
      and decrease the ratio of net investment income to average net assets
      assuming waiver of management fees by PIM and reduction for fees paid
      indirectly from 4.42% to 4.25%. Per share ratios and supplemental data for
      periods prior to January 1, 2001, have not been restated to reflect this
      change in presentation.

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


Pioneer America Income Trust
FINANCIAL HIGHLIGHTS



                                                             4/1/03
                                                           to 6/30/03
CLASS R (a)                                                (unaudited)
                                                       
Net asset value, beginning of period                        $ 10.31
                                                            -------
Increase from investment operations:
  Net investment income                                     $  0.03
  Net realized and unrealized gain on investments              0.03
                                                            -------
     Net increase from investment operations                $  0.06
Distributions to shareowners:
  Net investment income                                       (0.05)
  Net realized gains                                             --
                                                            -------
Net increase (decrease) in net asset value                  $  0.01
                                                            -------
Net asset value, end of period                              $ 10.32
                                                            -------
Total return*                                                  1.31%
Ratio of net expenses to average net assets+                   2.06%**
Ratio of net investment income to average net assets+          4.39%**
Portfolio turnover rate                                          69%**
Net assets, end of period (in thousands)                    $     1
Ratios with no waiver of management fees by
  PIM and no reduction for fees paid indirectly:
     Net expenses                                              2.08%**
     Net investment income                                     4.37%**
Ratios with waiver of management fees by
  PIM and reduction for fees paid indirectly:
     Net expenses                                              2.06%**
     Net investment income                                     4.39%**


(a)   Class R Shares were first publicly offered on April 1, 2003.
*     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.
**    Annualized.
+     Ratio with no reduction for fees paid indirectly.


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


Pioneer America Income Trust
NOTES TO FINANCIAL STATEMENTS 6/30/03 (unaudited)

1. Organization and Significant Accounting Policies

Pioneer America Income Trust (the Trust) 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 Trust is to
provide a high level of current income consistent with preservation of capital
and prudent investment risk.

The Trust offers four classes of shares - Class A, Class B, Class C and Class R
shares. Shares of each class represent an interest in the same portfolio of
investments of the Trust 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 has exclusive voting rights with respect to the
distribution plans that have been adopted by Class A, Class B, Class C and Class
R shareowners, respectively.

The Trust's financial statements have been prepared in conformity with
accounting principals generally accepted in the United States of America that
require the management of the Trust 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 Trust, which are in conformity with those generally accepted in the
investment company industry:

A.    Security Valuation

      Security transactions are recorded as of trade date. Securities are valued
      at prices supplied by independent pricing services, which considers such
      factors as Treasury spreads, yields, maturities and ratings. Valuations
      may be supplemented by dealers and other sources, as required. Principal
      amounts of mortgage-backed securities are adjusted for monthly paydowns.
      Premiums and discounts related to certain mortgage-backed securities are
      amortized or accreted in proportion to the underlying monthly pay downs.
      All discounts/premiums are accreted/amortized for financial reporting
      purposes. Interest income, including income on interest bearing


22


Pioneer America Income Trust

      cash accounts, is recorded on the accrual basis. Temporary cash
      investments are valued at amortized cost.

      Gains and losses on sales of investments are calculated on the identified
      cost method for both financial reporting and federal income tax purposes.

B.    Federal Income Taxes

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

      The characterization of distributions to shareowners for financial
      reporting purposes is determined in accordance with federal income tax
      rules. Therefore, the source of the Trust'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.

      The tax character of current year distributions paid will be determined at
      the end of the current fiscal year. The tax character of distributions
      paid during the year ended December 31, 2002 was as follows:



                                 2002
                              ----------
                           
  Distributions paid from:
   Ordinary income            $8,880,809
   Long-term capital gain             --
                              ----------
   Total                      $8,880,809

    Included in the Trust's distributions from ordinary income is $390,695 in
    excess of investment company income, which in accordance to applicable
    U.S. tax law, is taxable to shareowners as ordinary income distributions.

    The following shows components of distributable earnings on a federal
    income tax basis at December 31, 2002. These amounts do not include the
    capital loss carryforward.


                                                                              23


Pioneer America Income Trust
NOTES TO FINANCIAL STATEMENTS 6/30/03 (unaudited)                  (continued)



                                       2002
                                    ----------
                                 
  Undistributed ordinary income     $       --
  Undistributed long-term gain              --
  Unrealized appreciation            7,763,723
                                    ----------
  Total                             $7,763,723


      The difference between book-basis and tax-basis unrealized appreciation is
      primarily attributable to the tax deferral of losses on wash sales and the
      tax treatment of premium and amortization.

C.    Fund Shares

      The Trust records sales and repurchases of its shares as of trade date.
      Pioneer Funds Distributor, Inc. (PFD), the principal underwriter for the
      Trust and a wholly owned indirect subsidiary of UniCredito Italiano S.p.A.
      (UniCredito Italiano), earned $39,911 in underwriting commissions on the
      sale of Trust shares for the six months ended June 30, 2003.

D.    Class Allocations

      Distribution fees are calculated based on the average daily net asset
      value attributable to Class A, Class B, Class C and Class R shares of the
      Trust, respectively. Shareowners of each class share all expenses and fees
      paid to the transfer agent, Pioneer Investment Management Shareholder
      Services, Inc. (PIMSS), for its services, which are allocated based on the
      number of accounts in each class and the ratable allocation of related
      out-of-pocket expenses (see Note 3). Income, common expenses and realized
      and unrealized gains and losses are calculated at the Trust level and
      allocated daily to each class of shares based on their respective
      percentage of adjusted net assets at the beginning of the day.

      The Trust 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 shareowners are recorded as of the ex-dividend
      date. Distributions paid by the Trust 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, Class C and Class R shares can bear
      different transfer agent and distribution fees.


24


Pioneer America Income Trust

E.    Repurchase Agreements

      With respect to repurchase agreements entered into by the Trust, the value
      of the underlying securities (collateral), including accrued interest
      received from counter parties, is required to be at least equal to or in
      excess of the value of the repurchase agreement at the time of purchase.
      The collateral for all repurchase agreements is held in safekeeping in the
      customer-only account of the Trust's custodian, or sub custodians. The
      Trust's investment adviser, Pioneer Investment Management, Inc. (PIM), is
      responsible for determining that the value of the collateral remains at
      least equal to the repurchase price.

2. Management Agreement

PIM manages the Trust's portfolio and is a wholly owned indirect subsidiary of
UniCredito Italiano. Management fees are calculated daily at the annual rate of
0.50% of the Trust's average daily net assets.

PIM discontinued the Fund's expense limitation on May 1, 2003. Prior to May 1,
2003, PIM had agreed not to impose a portion of its management fee and to assume
other operating epxenses of the Trust 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 Trust-wide expenses attributable to Class B and Class
C shares were reduced only to the extent that such expenses were reduced for
Class A shares.

In addition, under the management and administration agreements, certain other
services and costs, including accounting, regulatory reporting and insurance
premiums, are paid by the Trust. At June 30, 2003, $149,927 was payable to PIM
related to management fees, administrative fees and certain other services.

3. Transfer Agent

PIMSS, a wholly owned indirect subsidiary of UniCredito Italiano, provides
substantially all transfer agent and shareowner services to the Trust at
negotiated rates. Included in due to affiliates is $45,271 in transfer agent
fees payable to PIMSS at June 30, 2003.

4. Distribution and Service Plans

The Fund adopted Plans of Distribution with respect to Class A, Class B, Class
C, and Class R shares (Class A Plan, Class B Plan, Class C Plan, and Class R
Plan) in accordance with Rule 12b-1 of the Investment Company Act of 1940.
Pursuant to the Class A Plan, the


                                                                              25


Pioneer America Income Trust
NOTES TO FINANCIAL STATEMENTS 6/30/03 (unaudited)                  (continued)

Trust pays PFD a service fee of up to 0.25% of the average daily net assets
attributable to Class A shares 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 Trust 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. Pursuant to the
Class R Plan, the Trust pays PFD 0.50% of the average daily net assets
attributable to Class R shares for distribution services. Included in due to
affiliates is $166,630 in distribution fees payable to PFD at June 30, 2003. The
Trust also has adopted a separate service plan for Class R shares (Service
Plan). The Service Plan authorizes the Trust to pay securities dealers, plan
administrators or other services organizations that agree to provide certain
services to retirement plans or plan participants holding shares of the Trust a
service fee of up to 0.25% of the Trust's daily net assets attributable to Class
R shares held by such plans.

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 4.00%, 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%. Redemptions of Class R shares within 18
months of purchase may be subject to a CDSC of 1.00%. Proceeds from the CDSCs
are paid to PFD. For the six months ended June 30, 2003, CDSCs in the amount of
$147,641 were paid to PFD.

5. Expense Offsets

The Trust has entered into certain expense offset arrangements resulting in a
reduction in the Trust's total expenses. For the six months ended June 30, 2003,
the Trust's expenses were reduced by $4,150 under such arrangements.


26


Pioneer America Income Trust
TRUSTEES, OFFICERS AND SERVICE PROVIDERS

Trustees                                 Officers
John F. Cogan, Jr., Chairman             John F. Cogan, Jr., President
Mary K. Bush                             Osbert M. Hood, Executive
Richard H. Egdahl, M.D.                   Vice President*
Margaret B.W. Graham                     Vincent Nave, Treasurer
Osbert M. Hood*                          Joseph P. Barri, Secretary
Marguerite A. Piret
Stephen K. West
John Winthrop

Investment Adviser
Pioneer Investment Management, Inc.

Custodian
Brown Brothers Harriman & Co.

Principal Underwriter
Pioneer Funds Distributor, Inc.

Legal Counsel
Hale and Dorr LLP

Shareowner Services and Transfer Agent
Pioneer Investment Management Shareholder Services, Inc.

*Mr. Hood was elected Trustee and Executive Vice President on June 3, 2003.

Proxy Voting and Procedures of the Fund are available without charge, upon
request, by calling our toll free number (1-800-225-6292). This information is
also on the Securities and Exchange Commission's web site at
http://www.sec.gov.


                                                                              27


RETIREMENT PLANS FROM PIONEER

Pioneer has a long history of helping people work toward their retirement goals,
offering plans suited to the individual investor and businesses of all sizes.
For more information on Pioneer retirement plans, contact your investment
professional, or call Pioneer at 1-800-622-0176.

Individual Retirement Accounts (IRAs)

Traditional IRA*

For anyone under age 701/2 earning income. Individuals can contribute up to
$3,000 annually. Earnings are tax-deferred, and contributions may be
tax-deductible.

Roth IRA*

Available to single individuals earning less than $110,000 in income annually,
and married couples with joint income less than $160,000. Contributions of up to
$3,000 a year are not tax-deductible, but all earnings are tax-free for
qualified withdrawals. Distributions are tax and penalty-free if certain
conditions are met.

Employer-Sponsored Plans

Uni-K Plan*

A 401(k) plan designed specifically for any business that employs only owners
and their spouses. Participants can make salary deferral contributions up to
$11,000 per year. In addition, each year the business may contribute up to 25%
of pay.

401(k) Plan*

Allows employees to make pre-tax contributions through payroll deduction, up to
$11,000 per year. Employers' contributions are discretionary. The 401(k) offers
companies maximum flexibility.

SIMPLE IRA Plan*

The Savings Incentive Match PLan for Employees (SIMPLE) is designed for
employers with 100 or fewer eligible employees. Employees can decide whether to
contribute. Employers must contribute.

      Most retirement plan withdrawals must meet specific conditions to avoid
      penalties.


28


403(b) Plan*

Also known as a Tax-Sheltered Account (TSA), this plan lets employees of public
schools, non-profit hospitals and other tax-exempt organizations make pre-tax
contributions through payroll deduction.

SEP-IRA

The Simplified Employee Pension (SEP) plan lets self-employed people and
small-business owners make tax-deductible contributions of up to 25% of income,
while maintaining complete contribution flexibility each year.

Profit Sharing Plan

Companies can decide each year whether - and how much - to contribute to
participants, up to 25% of each participant's pay. Can include vesting schedules
that are not available with a SEP-IRA.

Age-Based Profit Sharing Plan

Employer contributions are flexible, but are based on a formula using age and
salary. Each year, a business can contribute up to 25% of the total eligible
payroll.

Money Purchase Pension Plan (MPP)

Allows employer contributions, up to 25% of pay annually. Companies must
contribute a fixed percentage of pay each year.

Defined Benefit Pension Plan

Requires a business to contribute enough each year to fund a specific future
benefit. Most beneficial to older employees who need to accumulate assets
rapidly.

*     Special Catch-Up Provisions are available to individuals age 50 and older
      to contribute additional amounts to their retirement accounts. For more
      information, call our Retirement Plans Information line at 1-800-622-0176.

      Most retirement plan withdrawals must meet specific conditions to avoid
      penalties.


                                                                              29


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:

PIMSS, Inc.
P.O. Box 55014
Boston, Massachusetts 02205-5014

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

Our internet e-mail address                        ask.pioneer@pioneerinvest.com
(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.

[LOGO] PIONEER Investments(R)

Pioneer Investment Management, Inc.
60 State Street
Boston, Massachusetts 02109
www.pioneerfunds.com

                                                                   13712-00-0803
                                        (C) 2003 Pioneer Funds Distributor, Inc.
                                Underwriter of Pioneer mutual funds, Member SIPC




ITEM 2. CODE OF ETHICS.

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

Not applicable for semiannual reports; to be answered on annual submissions
after July 15, 2003.


ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT.

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

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

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

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

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

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

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

Not applicable for semiannual reports; to be answered on annual submissions
after July 15, 2003.


ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES.

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

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

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



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

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

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

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

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

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

Not applicable for semiannual reports; to be answered on annual submissions
after December 15, 2003.


ITEMS 5-6. [RESERVED]


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

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

Not applicable to open-end management investment companies.



ITEM 8. [RESERVED]


ITEM 9. CONTROLS AND PROCEDURES.

(a) The registrant's certifying officers have determined that the registrant's
disclosure controls and procedures are effective based on our evaluation of
 these
controls and procedures as of a date within 90 days prior to the filing date of
this report.

(b) There were no significant changes in the registrants internal controls
or in other factors that could significantly affect these controls subsequent
 to
the date of their evaluation, including any corrective actions with regard to
significant deficiencies and material weaknesses.


ITEM 10. EXHIBITS.

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

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

Not applicable.

(b) A separate certification for each principal executive officer and principal
financial officer of the registrant as required by Rule 30a-2 under the Act
(17 CFR 270.30a-2).

Filed herewith.





                                   SIGNATURES

                          [See General Instruction F]


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


(Registrant) Pioneer America Income Trust


By (Signature and Title)* /s/ John F. Cogan, Jr.
John F. Cogan, Jr, President

Date August 25, 2003


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


By (Signature and Title)* /s/ John F. Cogan, Jr.
John F. Cogan, Jr., President

Date August 25, 2003


By (Signature and Title)* /s/ Vincent Nave
Vincent Nave, Treasurer

Date August 25, 2003

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