• 2.5% of the high-3 average salary multiplied by the total service not to exceed 20 years; plus
    
• 2% of the high-3 average salary multiplied by any additional years of creditable service exceeding 20 years.

NOTE 1: In computing a CSRS annuity, all service, including non-law enforcement civilian service, military service, and credit for unused sick leave, receives credit for annuity at the 2 percent accrual rates.