WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
Putnam Income Fund
</LEGEND>
<SERIES>
<NUMBER> 5
<NAME> CLASS M
<S> <C>
<PERIOD-TYPE> ANNUAL
<FISCAL-YEAR-END> OCT-31-2000
<PERIOD-END> OCT-31-2000
<INVESTMENTS-AT-COST> 2,676,747,691
<INVESTMENTS-AT-VALUE> 2,561,818,519
<RECEIVABLES> 121,169,577
<ASSETS-OTHER> 11,145,477
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 2,694,133,573
<PAYABLE-FOR-SECURITIES> 83,376,139
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 19,497,150
<TOTAL-LIABILITIES> 102,873,289
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 2,962,695,523
<SHARES-COMMON-STOCK> 170,695,859
<SHARES-COMMON-PRIOR> 253,302,748
<ACCUMULATED-NII-CURRENT> 10,705,575
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> (266,828,006)
<ACCUM-APPREC-OR-DEPREC> (115,312,808)
<NET-ASSETS> 2,591,260,284
<DIVIDEND-INCOME> 2,832,998
<INTEREST-INCOME> 228,126,914
<OTHER-INCOME> 0
<EXPENSES-NET> 33,144,527
<NET-INVESTMENT-INCOME> 197,815,385
<REALIZED-GAINS-CURRENT> (116,301,707)
<APPREC-INCREASE-CURRENT> 29,958,425
<NET-CHANGE-FROM-OPS> 111,472,103
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (86,532,277)
<DISTRIBUTIONS-OF-GAINS> 0
DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 9,971,872
<NUMBER-OF-SHARES-REDEEMED> (92,925,457)
<SHARES-REINVESTED> 346,696
<NET-CHANGE-IN-ASSETS> (908,430,410)
<ACCUMULATED-NII-PRIOR> 85,462
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> (145,098,029)
<GROSS-ADVISORY-FEES> 15,138,276
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 33,955,343
<AVERAGE-NET-ASSETS> 1,329,893,625
<PER-SHARE-NAV-BEGIN> 6.41
<PER-SHARE-NII> .42
<PER-SHARE-GAIN-APPREC> (.17)
<PER-SHARE-DIVIDEND> (.41)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 6.25
<EXPENSE-RATIO> 1.20
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0
</TABLE>
