Exhibit 99



Form 3 Joint Filer Information



Name: General Atlantic Partners 54, L.P.

 General Atlantic Partners 57, L.P.

 General Atlantic Partners 60, L.P.

 GAP Coinvestment Partners, L.P.

 GAP Coinvestment Partners II, L.P.



Address:  c/o General Atlantic Service Corporation

     3 Pickwick Plaza

     Greenwich, CT  06830



Issuer and Ticker Symbol:  Hewitt Associates, Inc. (HEW)



Date of Event Requiring Statement:  10/1/04



Signatures:



General Atlantic Partners 54, L.P.

By:  General Atlantic LLC, its general partner



By:  /s/ Matthew Nimetz

       Title:  Managing Director



General Atlantic Partners 57, L.P.

By:  General Atlantic LLC, its general partner



By:  /s/ Matthew Nimetz

       Title:  Managing Director



General Atlantic Partners 60, L.P.

By:  General Atlantic LLC, its general partner



By:  /s/ Matthew Nimetz

       Title:  Managing Director



GAP Coinvestment Partners, L.P.



By:  /s/ Matthew Nimetz

       Title:  A General Partner



GAP Coinvestment Partners II, L.P.



By:  /s/ Matthew Nimetz

       Title:  A General Partner