The Coalition to Preserve the Defined Benefit System was founded in January 2003 by employer sponsors of defined benefit plans in response to the issuance of proposed regulations by the Treasury Department and Internal Revenue Service regarding age discrimination and retirement plan design.

Coalition members supported the regulations' clarification that the basic cash balance pension design was not age discriminatory, but were concerned that the regulations were not sufficiently inclusive of varying innovative defined benefit plan designs. These regulations were formally withdrawn in June 2004.