<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
COMMONWEALTH INCOME AND GROWTH FUND I
</LEGEND>
<S> <C>
<PERIOD-TYPE> 3-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> MAR-01-2000
<PERIOD-END> JUN-30-2000
<CASH> 151,947
<SECURITIES> 0
<RECEIVABLES> 434,364
<ALLOWANCES> 0
<INVENTORY> 0
<CURRENT-ASSETS> 607,667
<PP&E> 8,311,538
<DEPRECIATION> (6,885,701)
<TOTAL-ASSETS> 2,033,504
<CURRENT-LIABILITIES> 491,031
<BONDS> 249,139
0
0
<COMMON> 0
<OTHER-SE> 1,293,334
<TOTAL-LIABILITY-AND-EQUITY> 2,033,504
<SALES> 0
<TOTAL-REVENUES> 606,245
<CGS> 0
<TOTAL-COSTS> 496,982
<OTHER-EXPENSES> 0
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 6,077
<INCOME-PRETAX> 105,263
<INCOME-TAX> 0
<INCOME-CONTINUING> 0
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 105,263
<EPS-BASIC> .17
<EPS-DILUTED> 0
</TABLE>