<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
COMPANY'S REGISTRATION STATEMENT ON FORM S-1 AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH REGISTRATION STATEMENT ON FORM S-1
</LEGEND>
<CIK> 0001079880
<NAME> ONESOURCE INFORMATION SERVICES, INC.
<MULTIPLIER> 1
<CURRENCY> U.S. DOLLARS
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          MAR-31-1999
<PERIOD-START>                             JAN-01-1999
<PERIOD-END>                               MAR-31-1999
<EXCHANGE-RATE>                                      1
<CASH>                                           6,739
<SECURITIES>                                         0
<RECEIVABLES>                                    5,110
<ALLOWANCES>                                       288
<INVENTORY>                                          0
<CURRENT-ASSETS>                                17,928
<PP&E>                                           6,036
<DEPRECIATION>                                   4,248
<TOTAL-ASSETS>                                  20,723
<CURRENT-LIABILITIES>                           20,929
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         3,591
<OTHER-SE>                                    (10,246)
<TOTAL-LIABILITY-AND-EQUITY>                    20,723
<SALES>                                          8,143
<TOTAL-REVENUES>                                 8,143
<CGS>                                            3,457
<TOTAL-COSTS>                                    3,457
<OTHER-EXPENSES>                                 5,505
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                  93
<INCOME-PRETAX>                                  (412)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                              (412)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     (412)
<EPS-PRIMARY>                                   (0.08)
<EPS-DILUTED>                                   (0.08)