Q: If I retire CSRS after 41 years and 11 months of service, can I get an excess retirement contribution refund or purchase additional annuity over 80 percen?. Do I use entire contributions for the additional annuity calculations or just the amount over 80 percent?
A: Only the excess contributions may be used to purchase additional annuity. OPM will provide you with the exact amount when they process your retirement application.