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If you receive military retired pay, the military service it is based on generally can't also count in your FERS pension. To count it, you must waive the retired pay and pay the post-1956 military deposit before you leave federal service [1][2]. Two kinds of retired pay are exceptions, and that service can be credited without a waiver [1][2][3].

The basic rule

Federal law lets FERS employees count active-duty military service toward their civilian pension. Service after 1956 counts only if you pay a deposit [2][4]. There's a catch for military retirees: under 5 U.S.C. 8411(c)(2), if you're awarded retired pay based on a period of military service, your FERS service "may not include credit for such period" unless one of the exceptions applies [2]. OPM's regulation says the same thing: credit isn't allowed while you're receiving military retired pay for that period [3].

In practice, you get one benefit for those years, not both. You can keep the military retirement check, or you can waive it and fold those years into your FERS pension.

The two exceptions

OPM lists two kinds of military retired pay that don't block FERS credit [1]:

Even when an exception applies, the post-1956 deposit is still needed for that service to count [1]. Whether your retired pay falls into an exception is decided by the agency that pays it, and OPM accepts that agency's determination [3]. Ask your military pay center for a written statement if you think you qualify.

Who this usually affects

How to waive military retired pay

OPM tells employees to write to the Defense Finance and Accounting Service (DFAS) Retired Pay Operations Center at least 60 days before your planned retirement [1]. OPM lists the address as DFAS, U.S. Military Retirement Pay, 8899 E 56th Street, Indianapolis, IN 46249-1200, and a fax of 1-800-469-6559 [1]. OPM's suggested wording waives retired pay "effective (the day before your annuity begins)" and authorizes OPM to withhold from your annuity any retired pay paid after that date because of processing delays [1]. OPM accepts the paying agency's word on the waiver's effective date [3]. Confirm the current address and process on OPM's page before you send anything.

Remember the order of steps: the deposit has to be paid in full to your employing agency while you're still employed [4][3]. The waiver itself is filed around retirement, effective the day before your annuity starts [1]. Missing the deposit deadline means the years won't count even if you waive.

Worked example: keep or waive? (illustration only)

These are made-up numbers, not anyone's real benefit. Pat retired from the Army after 20 years and gets military retired pay. Pat then worked 15 years as a federal civilian under FERS and retires at 62 with a high-3 of $100,000.

So the comparison is simple: is the extra FERS pension bigger than the military retired pay you'd give up? In this example, waiving wins only if Pat's military retired pay is less than $23,500 a year. Crossing 20 total years can also unlock the 1.1% factor at 62, which is why the math sometimes favors waiving [5]. The extra service can also change your eligibility date (for example, reaching 30 years for an unreduced MRA+30 retirement) [6].

What else to weigh

We can't tell you how your military retired pay, its COLAs or your military survivor benefit would change after a waiver. Those come from DFAS and your branch, so get them in writing before you decide.

Step-by-step

  1. Ask HR for a deposit estimate and pay the deposit in full before you separate [4].
  2. Get your gross military retired pay amount from DFAS, plus a written determination if you think an exception applies [3].
  3. Run both scenarios in the FERS Pension Calculator (FERS service with and without the military years).
  4. If waiving wins, write to DFAS at least 60 days before retirement [1].
  5. Report the military service, deposit and retired pay details on your retirement application [6].

Run the numbers → open the FERS Pension Calculator

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    Official sources

    1. OPM: Military Retired Pay (crediting service and how to waive)
    2. 5 U.S.C. 8411: Creditable service (military service and retired pay)
    3. eCFR: 5 CFR 842.306-842.307 (military service credit and deposits)
    4. OPM: Service Credit (military deposit rates and rules)
    5. OPM: FERS Computation
    6. OPM: Types of Retirement (eligibility, MRA, disability, FERS supplement)

    Checked against the official sources above on November 2, 2026. Education only, not legal or financial advice. Not affiliated with OPM, VA, DoD or any government agency.

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