Your FERS refund depends on how long you worked and how much you contributed

The amount you receive from the Federal Employees Retirement System (FERS) when you leave federal service without meeting retirement requirements is based on your own contributions to the system, plus interest. The government does not add matching funds to your refund — you get back what you paid in, with interest calculated from the date each contribution was made.

The exact figure depends on three things: your salary history, how many years you contributed, and the interest rate applied by the Office of Personnel Management (OPM). You cannot calculate this yourself without access to your complete earnings record, which is why OPM provides the calculation as part of the refund process.

Key Takeaways

  • Your refund consists only of your own contributions plus interest — the government does not include its matching share when you leave before retirement may be able to access.
  • The interest rate is set by law and changes each year; OPM applies the rate that was in effect when each contribution was made.
  • You must request a refund estimate from OPM in writing, because the calculation requires your complete earnings record from the National Finance Center.
  • The refund is typically paid as a lump sum within 30 to 60 days of your request, though the estimate itself may take several weeks to arrive.
  • If you return to federal service later, you can repay the refund and restore your service credit — but only within specific time limits.

What goes into the FERS refund calculation

Your refund is the sum of every paycheck deduction you made to FERS, starting from your first day of federal employment. For most employees, this is 0.8% of your gross salary. If you are a law enforcement officer, firefighter, or air traffic controller, your contribution rate is higher — typically 7.5% — and your refund reflects that difference.

OPM adds interest to each contribution based on the year it was deducted. The interest rate changes annually and is published in the Federal Register. For example, a contribution made in 2015 earns interest at the 2015 rate, a contribution made in 2020 earns interest at the 2020 rate, and so on. This means your refund is not a straightforward multiplication of salary times years — it is a year-by-year calculation that requires access to your complete record.

The interest rates themselves are modest. In recent years they have ranged from about 1% to 3% annually, depending on the year. OPM publishes historical rates on its website if you want to see what applied to your service period.

How to request your refund amount from OPM

You cannot get an official refund estimate online or by phone. You must submit a written request to the National Finance Center (NFC), which maintains all FERS contribution records for federal employees. The request should include your name, date of birth, Social Security number, and the date you separated from federal service.

Mail your request to the National Finance Center, Attn: FERS Refund Section, 1500 Port Republic Road, Beaumont, TX 77706. Include a copy of your separation notice or last pay stub showing your final date of employment. Some agencies allow you to submit the request through your HR office, which will forward it to NFC on your behalf — ask your former agency's benefits office whether this option is available to you.

The NFC will respond with a written estimate that breaks down your contributions year by year and shows the interest calculation. This estimate is not binding until you formally request payment, but it gives you the exact figure you will receive. The estimate typically arrives within 4 to 8 weeks, depending on the volume of requests NFC is processing.

Why you cannot calculate this yourself

Your payroll records and the interest calculation are held in a federal database that you do not have direct access to. Even if you kept every pay stub from your entire federal career, you would not have the complete picture — you would need to know the exact gross salary for each pay period, which may differ from what you see on your stub if you had tax-deferred contributions, health insurance deductions, or other adjustments.

The interest calculation is also more complex than it appears. OPM does not straightforward explore one rate to your total balance. Instead, it tracks each contribution separately and applies the interest rate for the year that contribution was made. A contribution from 2010 earns 2010-rate interest, a contribution from 2011 earns 2011-rate interest, and so on. Only the National Finance Center has the systems in place to perform this calculation accurately.

If you want a rough estimate before requesting the official calculation, you can multiply your average annual salary by your years of service by 0.8% (or 7.5% if you are in a special category), then add 2% to account for interest. This will be in the ballpark but will not match the official figure.

What happens if you return to federal service

If you receive a FERS refund and later return to federal employment, you have the option to repay the refund and restore your previous service credit. This is called redeposit. The amount you repay is the refund you received, not the original contributions — so if you received $15,000 as a refund, you repay $15,000 to restore your service credit.

You must request redeposit within three years of your return to federal service. If you wait longer than three years, you lose the right to restore that service credit, though you can still make new contributions going forward. Redeposit is usually deducted from your paycheck over a set period, though you can also pay the full amount at once if you prefer.

Redeposit is worth considering if you plan to stay in federal service long enough to reach retirement. The service credit you restore counts toward your retirement may be able to access and your final benefit calculation. However, if you are only returning for a short time, redeposit may not be worth the cost.

Timing and payment of your refund

Once you receive the estimate from NFC and confirm the amount is correct, you submit a formal request for payment. NFC will process the payment within 30 to 60 days. The refund is typically sent as a check mailed to your address on file, though some employees can request direct deposit to a bank account.

If you have any outstanding federal debts — such as unpaid taxes, student loans in default, or overpayments from a previous federal job — the refund may be offset to pay down those debts. The National Finance Center will notify you in advance if an offset will occur, and you have the right to request a hearing to dispute the offset.

The refund is subject to federal income tax. NFC will withhold 20% for federal taxes unless you request a direct rollover to an IRA or another may be able to access retirement account. If you choose a direct rollover, no tax is withheld at the time of payment, though you will owe taxes when you eventually withdraw the money from the IRA.

Special situations that affect your refund

If you worked for multiple federal agencies during your career, all your FERS contributions are combined into one refund calculation. You do not need to contact each agency separately — the National Finance Center has access to your complete record across all federal employers.

If you took unpaid leave (such as leave without pay for military service or family care), those periods do not count as service credit for FERS purposes, and you did not make contributions during those months. Your refund reflects only the months you actually worked and contributed.

If you are a survivor or beneficiary receiving a refund on behalf of a deceased federal employee, the process is the same but you will need to provide a death certificate and proof of your relationship or legal authority to receive the refund. Contact NFC directly for the specific documents required in your situation.

Frequently Asked Questions

Can I get my refund estimate before I separate from federal service?

Yes. You can request an estimate at any time, even while still employed. This is useful if you are deciding whether to stay until retirement may be able to access or leave early. Submit the same written request to NFC with your current employment status noted.

What if the estimate from NFC seems wrong?

Review the year-by-year breakdown NFC provides. If you spot a missing year or a salary that looks incorrect, contact the National Finance Center with the specific discrepancy and any pay stubs you have to support the correction. NFC will investigate and issue a revised estimate if an error is found.

Is the interest rate the same for everyone?

The interest rate is the same for all FERS employees in a given year, but it changes annually. Your refund uses the rate that applied in each year you contributed, so employees who worked during different periods will have different interest rates applied to their contributions.

Can I choose to receive my refund as monthly payments instead of a lump sum?

No. FERS refunds are paid as a single lump sum only. If you want to spread the money over time, you can deposit it into an IRA or other account and withdraw it gradually, but the refund itself is not paid in installments.

What if I owe money to the federal government?

Your refund can be offset to pay federal debts, including back taxes, defaulted student loans, or overpayments from previous federal employment. NFC will notify you in writing if an offset will occur and explain how to request a hearing if you dispute the debt.