If you’re a federal employee approaching retirement, chances are you’ll have some unused leave on the books. The big question is: What happens to it? Does it boost your pension? Do you get paid for it? Or is it better to “burn” it before you go?
The answer depends on the type of leave you’re talking about—sick leave and annual leave are treated very differently under federal retirement rules. Understanding those differences will help you make the most of your time (and money) as you transition out of federal service.
Unused Sick Leave: Pension Booster, Not a Payday
Unused sick leave is not paid out as cash when you retire. Instead, it is converted into creditable service that increases the length of service used in your pension calculation.
Your basic FERS pension formula looks like this:
Years of Creditable Service × High-3 Salary × Multiplier = Annual Pension
Adding more years of service increases your pension for the rest of your life. Sick leave helps by padding your “years of creditable service” — but only if you already meet the minimum age and service requirements for an immediate retirement. Sick leave cannot be used to qualify for retirement eligibility.
How Sick Leave is Converted to Service
One year of creditable sick leave = 2,087 hours (the number of work hours in a federal work year).
One month = 174 hours (2,087 ÷ 12).
One day = 5.8 hours (174 ÷ 30)
OPM only counts full 30-day months when calculating your pension. Any leftover days after combining your actual service and your sick leave are dropped.
Example:
If you have 20 years, 5 months, and 10 days of actual service, and 25 days worth of sick leave, OPM first adds them together (20 years, 6 months, 5 days), then drops the leftover 5 days. Your pension is calculated using 20 years and 6 months.
CSRS vs. FERS Impact
CSRS: Each year of sick leave increases your pension by about 2%.
FERS: Each year of sick leave increases your pension by about 1% (or 1.1% if you retire at age 62+ with at least 20 years of service).
Example Under FERS
Let’s say your high-3 average salary is $100,000, you have 30 years of service, and your multiplier is 1%.
Without sick leave: 30 × $100,000 × 1% = $30,000/year pension
With one year of sick leave: 31 × $100,000 × 1% = $31,000/year pension
That’s an extra $1,000 per year for life.
Special Case: Qualifying for the 1.1% Multiplier
If you retire at age 62 or later and have at least 20 years of service, your FERS multiplier jumps from 1% to 1.1%—a 10% pension boost.
Sick leave can help here, but only if:
- You are already at least age 62, and
- Your total creditable service (actual service + converted sick leave) adds up to at least 20 years.
Unused Annual Leave: A Lump-Sum Payday
Unused annual leave is completely different. When you retire, the government pays you for it in a lump sum, as if you had stayed on the payroll for the length of time your annual leave represents.
How the Payout is Calculated:
When FERS employees retire they are given a lump sum payment for any unused annual leave they have on the books at retirement.
The amount of the lump sum is simply what you would have been paid had you actually worked those hours.
For example, if you have 200 hours of annual leave and your pay rate is $50/hour then your gross annual leave payout would be:
200 hours x $50 = $10,000
But do they take into account a pay raise you would’ve received if you would have stayed working longer?
Yes, they do! For example, let’s say you retire Dec 31st and you would have received a pay raise had you stayed on into the next year.
In this situation they’ll pay out your annual leave lump sum at the pay rate you would have had if you had worked into the new year.
Simply put, they pay out your annual leave at the rate you would’ve received if you had stayed on and used your annual leave at the end of your career.
Maximizing Your Annual Leave Payout
Most federal employees can carry over up to 240 hours of annual leave into a new leave year (more for some overseas or special category employees).
However, there’s no cap on how much annual leave can be paid out when you retire. If you retire before the end of the leave year, you can be paid for all hours on the books—even those above the carryover limit. That’s why some employees strategically retire in late December or early January (before the leave year ends) to maximize their lump sum.
Which Is Better to Save—Sick or Annual Leave?
If you have the flexibility to choose, most experts recommend:
Use sick leave first for time off in your final year, if your situation allows. Just keep in mind that some agencies have strict policies and approval requirements for sick leave usage.
Bank annual leave for the lump-sum payout.
Why? Because the lump sum from annual leave gives you immediate, tangible cash at your full salary rate. In contrast, sick leave only boosts your pension by a small amount each year. Even with cost-of-living adjustments, it can take many decades—and in some cases, well over a lifetime—for the cumulative pension increase from sick leave to equal the upfront value of the same amount of annual leave.
Bottom Line
Sick leave boosts your pension by adding to your years of creditable service (but can’t make you eligible to retire sooner).
Annual leave is paid out in a lump sum, often worth tens of thousands of dollars, and can be maximized by strategic retirement timing.
If you have the choice, it’s generally better to use sick leave for time off and keep annual leave for the payout.
Planning ahead—ideally a year or two before your target retirement date—can help you walk away with both a slightly bigger pension and a nice lump-sum check. That’s a win-win for starting your federal retirement on the right foot.