If a member participated with more than one IMRF employer during his or her IMRF career, the member’s current employer would need to adopt the ERI in order for the member to retire under it.
The current employer would bear the entire employer cost for the ERI because the current employer will benefit from reduced payroll/fringe benefit costs.
The member’s previous employer(s) would not be affected; they would not share the ERI cost nor would their IMRF rate be affected. This is true even if the previous employer adopts ERI. A member can retire under ERI only if his or her current employer adopts it.