As an active member, you are eligible for a Service Retirement Allowance when you meet the minimum age and Service Credit requirements listed below. This subpart contains regulations concerning automatic coverage under the Federal Employees Retirement System (FERS).Pension is payable on retirement after attaining the age of compulsory retirement (superannuation) or in advance of this age under certain circumstances. How do I calculate my retirement benefit? You should use this application if you want to apply for an annuity which will begin within 30 days of your separation from Federal service. This is a State retirement system which, if you join under present law, permits retirement at age 63 or older with ten or more years of creditable service. See if you're eligible. Eligibility is always based on work. Gov website belongs to an official government organization in the United States. 137 What is the Federal.