<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> YEAR <FISCAL-YEAR-END> DEC-31-1998 <PERIOD-START> JAN-01-1998 <PERIOD-END> DEC-31-1998 <EXCHANGE-RATE> 1 <CASH> 8,665 <SECURITIES> 0 <RECEIVABLES> 9,921 <ALLOWANCES> 300 <INVENTORY> 0 <CURRENT-ASSETS> 25,374 <PP&E> 5,804 <DEPRECIATION> 4,034 <TOTAL-ASSETS> 27,646 <CURRENT-LIABILITIES> 27,492 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 3,592 <OTHER-SE> (9,903) <TOTAL-LIABILITY-AND-EQUITY> 27,646 <SALES> 30,428 <TOTAL-REVENUES> 30,428 <CGS> 13,655 <TOTAL-COSTS> 13,655 <OTHER-EXPENSES> 21,737 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 595 <INCOME-PRETAX> 7,238 <INCOME-TAX> 250 <INCOME-CONTINUING> 6,988 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 6,988 <EPS-PRIMARY> 0.85 <EPS-DILUTED> 0.59