CSRS Retirement Eligiblity
Under the Civil Service Retirement System (CSRS), you must have at least 5 years of creditable civilian service to be eligible for an annuity.
Additionally, you must comply with the "1 out of 2" rule; that is, you must be be subject to CSRS for 1 out of the 2 years of service before separation on which your retirement is based (this requirement does not apply in disability retirement cases).
Voluntary optional, early retirement, discontinued service, disability, and deferred retirement. [ MORE ]
Optional & mandatory retirement for Law Enforcement, Firefighters & Air Traffic Controllers [ MORE ]
If agency undergoes major reorganization, reduction in force (RIF), or transfer of function, OPM may permit early optional retirement. [ MORE ]
Discontinued service retirement because of an involuntary separation (separation against the will and without consent of the employee, other than "for cause" for misconduct or delinquency) [ MORE ]