1. Use the Marital Coverture Formula
This plan likely calculates benefits based on final average earnings, years of service, and an accrual rate. For marriages that lasted only part of the participant’s service, a coverture approach is best:
Alternate payee receives 50% of the benefits earned during the marriage, based on the ratio of married service to total service.
This approach is accepted by almost all defined benefit plans and prevents overpayment or underpayment to either party.

