Calculating retirement eligibility date


Q. How do I calculate my retirement eligibility date? I have two periods of service under FERS: July 19, 2010, through Oct. 27, 2010, and Oct. 12, 2010, through the present? I’m confused by the definition of a month. Is my first period of service two months (the calendar months of August and September), three months (July 19 through Oct. 18 after eliminating the partial month from Oct. 19 through Oct. 27), or three months and 11 days?

A. To see how that’s done, go to and scroll to Section 50A2.1-3.


About Author

Reg Jones was head of retirement and insurance policy at the Office of Personnel Management. Email your retirement-related questions to

Leave A Reply