Creditable Service: The Years That Quietly Don’t Count
Emily A. Hall ·
Creditable service is the foundation of your annuity — the years figure in the formula. Federal employees generally assume that time worked equals time credited. There are gaps where that is not true.
Temporary or non-deduction service before January 1, 1989
Time in a temporary appointment where retirement deductions were not withheld, performed before 1989, is generally creditable only if you pay a deposit. The deposit is roughly 1.3% of the basic pay you earned during that period, plus interest.
Left unpaid, the time may not count in the computation. The interest accrues, so the cost of addressing it rises the longer it sits.
Temporary or non-deduction service on or after January 1, 1989
This is the harder rule: non-deduction service performed on or after that date is generally not creditable at all under FERS, with limited exceptions. There is usually no deposit available to purchase it.
Employees who spent two or three years in temporary appointments before converting to a permanent position are frequently surprised to learn that time does not appear in their service computation and cannot be bought.
Refunded service
If you left federal service at some point and took a refund of your retirement contributions, that period may require a redeposit to count toward your benefit. The rules differ depending on when the service occurred and when the refund was taken.
People who left government in their twenties, cashed out, and returned years later routinely have this sitting unresolved in their record.
Why this matters twice
Creditable service affects two separate things:
- Eligibility — whether you have the years needed to retire at all, at a given age.
- Computation — the years figure that multiplies your high-3.
A gap can therefore both delay when you can retire and shrink what you receive when you do. Employees planning around a service total they have not verified are planning around a number that may be wrong.
What to do
- Request your service computation and read it against your own history.
- Flag any temporary appointments, breaks in service, or periods where you took a refund.
- Ask your servicing HR office in writing whether a deposit or redeposit applies, and what it would cost today.
- Do this early. Interest compounds, and the answer may change decisions you would otherwise make years from now.
General education, not benefits counseling. Verify your service history and any deposit obligations with your servicing HR office and OPM.