Filed pursuant to Rule No. 424(b)(3)
                                                           File Number 333-62154


PROSPECTUS SUPPLEMENT NO. 12


                           THE BISYS GROUP, INC.
                                $300,000,000
                 4% Convertible Subordinated Notes due 2006
      and shares of common stock issuable upon conversion of the notes


         This prospectus supplement supplements the prospectus dated June 15,
2001 of The BISYS Group, Inc. relating to the sale by certain of our
securityholders (including their pledgees, donees, assignees, transferees,
successors and others who later hold any of the securityholders' interests) of
up to $300,000,000 principal amount at maturity of notes and the shares of
common stock issuable upon conversion of the notes. You should read this
prospectus supplement in conjunction with the prospectus, and this prospectus
supplement is qualified by reference to the prospectus, except to the extent
that the information in this prospectus supplement supersedes the information
contained in the prospectus.

         The following represents updated information regarding the selling
securityholder listed in the selling securityholder table in the prospectus:




                                         Aggregate
                                         Principal                       Number of
                                         Amount at                       Shares of     Percentage of
                                        Maturity of     Percentage of   Common Stock     Shares of
                                         Notes That         Notes       That May Be    Common Stoc,
        Name                            May Be Sold      Outstand         Sold (1)     Outstanding (2)
- ------------------------------------- --------------- ---------------- -------------- ---------------
                                                                               
Occidental Petroleum Corporation.....     $37,000            *             1,108             *
_____________
*   Less than one percent (1%).

(1)      Assumes conversion of all of the holder's notes at a conversion rate of 29.9458 shares of
         common stock per $1,000 principal amount at maturity of the notes.  We adjusted the
         conversion rate in February 2002 to reflect a 2-for-1 stock split in our outstanding shares of
         common stock effected in the form of a stock dividend.  This conversion rate is subject to
         further adjustment, however, as described under "Description of the Notes-Conversion
         Rights".  As a result, the number of shares of common stock issuable upon conversion of the
         notes may increase or decrease in the future.

(2)      Calculated based on Rule 13d-3(d)(i) of the Exchange Act, using 119,717,723 shares of
         common stock outstanding as of January 31, 2003.  In calculating this amount for each
         holder, we treated as outstanding the number of shares of common stock issuable upon
         conversion of all of that holder's notes, but we did not assume conversion of any other
         holder's notes.


         Investing in the notes or shares of common stock involves risks that
are described in the "Risk Factors" section beginning on page 6 of the
prospectus.

         Neither the Securities and Exchange Commission nor any state
securities commission has approved or disapproved of these securities or
determined if this prospectus supplement is truthful or complete. Any
representation to the contrary is a criminal offense.

           The date of this prospectus supplement is March 6, 2003.