FERS Annual Leave Lump Sum at Retirement: How It's Calculated and Taxed

Your Unused Annual Leave Becomes a Lump Sum

When you separate from federal service — whether through retirement, resignation, or involuntary separation — any unused annual leave in your balance is paid out as a lump-sum payment. Unlike sick leave, which converts to service credit for your pension, annual leave converts directly to cash.

The payout is calculated using your hourly rate of basic pay at the time of separation. If you're a GS-13, Step 7 in the DC locality area earning $127,000 annually, your hourly rate is roughly $60.86 (annual salary ÷ 2,087 hours). With 400 hours of unused annual leave, the gross lump sum is approximately $24,344.

This payment comes from your employing agency, not from OPM. It's typically processed within one to two pay periods after your separation date and appears on your final earnings statement.

The Payout Calculation

The lump-sum formula has a few details that affect the total:

The rate used is your basic pay rate at separation — the same rate used for your high-3 average salary calculation. This includes your base salary and locality pay. It does not include overtime rates, shift differentials, or any premium pay.

The lump sum extends your pay period on paper. Rather than simply multiplying hours by rate, OPM regulations require the agency to project forward from your separation date as if you were still on the payroll. Each day of projected "service" consumes 8 hours of leave. Holidays that fall during this projected period extend the payout further because no leave is charged for holidays.

In practice, this means a large leave balance can push your projected end date several weeks beyond your actual last day of work, increasing the dollar payout when holidays fall in that window. The projection is a pay-calculation rule, not continued employment: if you retire eligible to carry FEHB, retiree coverage begins the day after separation.

The leave balance cap matters. Most federal employees can carry over a maximum of 240 hours (30 days) of annual leave from one year to the next. Employees stationed overseas carry 360 hours. SES members and those in certain senior positions may accumulate more under restored leave provisions. There's no additional cap on the lump-sum payout — whatever your balance is at separation, regardless of how it accumulated, gets paid out.

Tax Treatment

The annual leave lump sum is fully taxable as ordinary income in the year you receive it. There's no exclusion ratio, no special treatment, and no option to spread it across tax years.

This creates a common first-year tax problem. In the calendar year you retire, you may have:

• Several months of full federal salary
• The annual leave lump sum
• Pension payments (possibly starting mid-year)
• Social Security (if claiming)
• TSP withdrawals (if needed during interim pay)

All of this income stacks in a single tax year. An employee earning $100,000 who retires in July with a $20,000 lump sum has roughly $70,000 in salary plus $20,000 in lump sum plus several months of pension income — potentially pushing them well above their normal bracket.

Federal income tax is withheld from the lump sum at a flat supplemental rate (currently 22% for payments up to $1 million). State taxes, if applicable, are also withheld. This standard withholding may be insufficient if the combined income pushes you into the 24% or 32% bracket, so estimated tax payments or adjusted withholding on other income sources may be needed.

Annual Leave Does Not Convert to Service Credit

This is worth emphasizing because it's a frequent point of confusion: annual leave and sick leave are handled completely differently at retirement.

Sick leave converts to additional months and days of creditable service using the 2087 chart, increasing your pension calculation. Sick leave has zero cash value at retirement — if you don't use it, it boosts your pension, but you never see a check for it.

Annual leave is paid out as cash. It adds nothing to your creditable service, nothing to your pension calculation, and nothing to your eligibility for any retirement benefit. It's simply money owed to you for time you earned but didn't take.

The strategic implication: in the months before retirement, there's no pension benefit to hoarding annual leave. The only reason to carry a large balance into retirement is if you want the cash payout. Some employees prefer to use leave strategically in their final months to reduce their schedule while remaining on the payroll (and continuing to accrue service credit and sick leave).

Planning the Lump Sum

A few practical considerations:

Use-or-lose deadlines still apply. Annual leave above the 240-hour carry-over limit must be used or lost by the end of the leave year. If you're planning a mid-year retirement, check whether any leave will expire before your separation date.

The lump sum doesn't count toward your high-3. Even though the payment is based on your basic pay rate, the lump sum itself is excluded from the high-3 average salary calculation. Your high-3 uses only the regular basic pay earned during your highest 36 consecutive months — not one-time payouts.

Factor the lump sum into your six-month reserve. During the OPM adjudication period (averaging 108 days as of June 2026), you'll receive interim pay at 60-80% of your estimated annuity. The annual leave lump sum, arriving within weeks of separation, provides a cash bridge during this gap. Employees with substantial leave balances may find the lump sum covers a significant portion of the interim pay shortfall.

For a comprehensive view of how all the pieces — pension formula, lump-sum pay, interim pay timeline, and tax planning — fit together, the FERS Annuity Guide walks through each step of the retirement income transition.

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