Although an IMRF member must make application for past service credits before he or she terminates participating employment with an IMRF or reciprocal systems employer, one payment for past service can be accepted after the termination date.
Retired IMRF members receiving IMRF pensions will have their pensions recalculated after payment is received. The higher benefit amount will be effective the month after IMRF receives the payment for past service. For example, If the payment is received in July, the higher benefit will be effective in August.