When you retire from the Postal Service, every hour of unused annual leave gets paid out as a lump sum. For a senior employee with a full leave balance, that check can be worth $15,000 to $25,000 or more — a significant cushion during the transition to retirement income. But the payout isn’t as simple as multiplying your hours by your hourly rate, and the tax treatment catches a lot of people off guard.
Here’s how the annual leave lump sum actually works, what gets deducted, and how to plan your retirement timing to maximize what you take home.
How the Lump Sum Is Calculated
The Postal Service doesn’t just multiply your leave balance by your current hourly rate. Instead, your unused hours are projected forward as if you were still on the payroll. The agency calculates what you would have been paid if you had stayed on annual leave instead of retiring.
This matters because if your leave hours cross into a new pay period where a general wage increase or COLA takes effect, those hours are paid at the higher rate. Holidays that fall within the projected leave period count as workdays too, so they don’t reduce your payout.
Your lump sum pay rate includes base pay plus locality pay (or the postal equivalent), and it may also include night differential, Sunday premium, and regularly scheduled overtime if those were part of your regular compensation. It does not include one-time payments like retention incentives.
How Much Leave Can You Cash Out?
The maximum depends on what you’re carrying over from the prior leave year plus what you’ve accrued in the current year.
| Employee Type | Max Carryover |
|---|---|
| Most bargaining unit employees (APWU, NALC, NPMHU) | 440 hours (55 days) |
| EAS / Postmaster | 560 hours (70 days) |
On top of your carryover balance, you also receive credit for any annual leave accrued during the current leave year up to the date you separate. If you’re in the highest accrual category (15+ years of service), you earn 8 hours per pay period. So if you retire halfway through the leave year, you could have an additional 100+ hours of current-year leave on top of your carryover.
Annual leave accrual rates
| Years of Service | Hours per Pay Period | Annual Total |
|---|---|---|
| Under 3 years | 4 hours | 104 hours (13 days) |
| 3 to 15 years | 6 hours | 156 hours (19.5 days) |
| 15+ years | 8 hours | 208 hours (26 days) |
How It’s Taxed
This is where the lump sum hurts more than people expect. The payout is treated as regular wages, and the following deductions are taken:
Federal income tax — withheld at supplemental wage rates or your regular withholding rate, depending on how your payroll office processes it.
State income tax — if your state has income tax, it’s withheld from the lump sum.
FICA (Social Security) — 6.2% up to the annual Social Security wage base ($168,600 in 2026). If your total wages for the year have already exceeded this limit before retirement, no additional FICA is withheld from the lump sum.
Medicare tax — 1.45% with no cap. This always applies.
What’s not deducted: FERS/CSRS retirement contributions, TSP contributions, health insurance premiums, and life insurance premiums. You cannot direct any portion of the lump sum into your TSP or an IRA — it’s paid as taxable wages, period.
Annual Leave vs. Sick Leave: Know the Difference
This is a critical distinction that trips people up:
Annual leave is paid out as a lump sum cash payment. You get a check for every unused hour.
Sick leave is never paid out as cash. Instead, unused sick leave is converted into additional service credit for your FERS (or CSRS) annuity calculation. Every 2,087 hours of sick leave adds one year of service to your retirement computation. So 1,000 hours of unused sick leave adds roughly 5.7 months of service credit, which can meaningfully increase your monthly annuity for the rest of your life.
The practical takeaway: if you’re approaching retirement and need to use some leave for personal reasons, use sick leave for legitimate medical needs and preserve your annual leave for the cash payout. Never burn through sick leave just to use it up — the retirement service credit is almost always more valuable over a full retirement than the equivalent hours of annual leave cash.
Timing Your Retirement for Maximum Payout
When you retire affects both the size of your lump sum and how much tax you pay on it. Here are the key timing considerations:
FERS retirement date rules
To receive your first annuity check for the month following retirement, FERS employees must retire on the last day of the month. If you retire on any other day, your first annuity payment is delayed. This creates a tension with leave year timing that you need to plan around.
Leave year vs. calendar year
The USPS leave year doesn’t perfectly align with the calendar year. The 2026 leave year started January 10, 2026 (the beginning of Pay Period 03). If you retire before the leave year ends, you can cash out your carryover plus whatever you accrued in the current year. If you wait until after the leave year ends, any hours above the carryover maximum are forfeited — you lose them.
Tax year timing
Retiring early in the calendar year (January or February) means your lump sum is taxed against a lower total income for that year, since you won’t have many months of regular salary stacked underneath it. This can result in a lower effective tax rate on the payout compared to retiring in November after earning nearly a full year’s salary.
Advanced Leave vs. Accrued Leave
Full-time regular carriers (NALC) receive their annual leave as an advance at the beginning of each leave year. This means your leave balance on your earnings statement may show more hours than you’ve actually earned. If you retire before the end of the leave year, you only get paid for leave you’ve actually accrued, not the advanced balance.
For example, if you retire in March and your balance shows 480 hours but you’ve only accrued 440 (carryover) + 24 (three pay periods at 8 hrs each) = 464 hours, you’ll be paid for 464, not 480. The difference was advanced leave you hadn’t yet earned.
APWU and NPMHU employees accrue leave as they go, so their balance more closely reflects what they’ve actually earned. But it’s still worth verifying your accrued balance before making a retirement decision.
Annual Leave Exchange Option
USPS offers an Annual Leave Exchange program where eligible employees can exchange a portion of the following year’s annual leave for cash. This is separate from the retirement lump sum and is available to employees who plan to continue working. It’s essentially getting paid for leave you haven’t taken yet — useful for boosting income in a given year, but it reduces the leave available for vacation and for your eventual retirement payout.
If you’re within a few years of retirement, think carefully before exchanging leave. Those hours have more value as part of your retirement lump sum than as an annual cash-out, especially when you consider the retirement timing and tax optimization strategies above.
What to Do Before You Retire
Check your leave balance on LiteBlue. Verify your annual leave balance and confirm how many hours are carryover versus current-year accrual. If you’re a letter carrier, make sure you understand the difference between your advanced balance and your accrued balance.
Estimate your gross payout. Multiply your total cashable hours by your hourly rate (including locality). Then expect roughly 25–35% to come out in taxes, depending on your income level and state.
Consider your retirement date carefully. Balance the FERS last-day-of-month rule, the leave year calendar, and your calendar year income to find the date that maximizes both your annuity start and your after-tax lump sum.
Keep your final LES. Save a copy of your last Leave and Earnings Statement showing your leave balances, and request a copy of your SF-1150 (Record of Leave Data Upon Separation) for your records. If there’s a discrepancy in your payout, you’ll need these documents.
Plan for the gap. It can take OPM several months to finalize your retirement. During that time, you’ll receive interim annuity payments that are typically lower than your final amount. Your annual leave lump sum can serve as a critical bridge to cover expenses during this period.
Want to estimate your full retirement picture including your annuity, TSP, and Social Security? Our calculators help you plan.
Calculate Your Retirement Income →Related: How Sick Leave Credits Boost Your Retirement · FERS Retirement Guide for Postal Employees