Unused Sick Leave Credit: The 2,087-Hour Rule

Updated June 2026 · Educational only — not financial, tax, or legal advice

Under FERS, the sick leave you never used doesn't disappear when you retire — it's converted into extra service credit that increases your pension. It's a genuine reward for not burning sick leave you didn't need. But there are two rules that surprise people: it doesn't help your eligibility, and a rounding quirk can quietly erase the last few days. Here's how it works.

The conversion: 2,087 hours = 1 year

OPM converts unused sick leave to service time using a 2,087-hour work year. So:

• 2,087 hours of unused sick leave ≈ 1 year of additional service credit
• about 174 hours ≈ 1 month
• 1,044 hours ≈ 6 months

That credit is added to your years of service in the pension formula. At a $100,000 high-3 and the 1% multiplier, a full extra year of sick-leave credit is worth about $1,000 a year — for life.

Rule #1: It never counts toward eligibility

This is the one that trips people up. Sick leave is added only to the service used to compute your annuity amount — never to the service that determines whether you're eligible to retire. If you need 30 years to retire at your MRA, 29 years and 9 months of actual service plus a year of sick leave does not get you there. You must reach the eligibility threshold on real service first; the sick leave then sweetens the computation. The same applies to the 20 years needed for the 1.1% multiplier.

Rule #2: The month-boundary rounding trap

Your annuity is computed in whole years and months — and here's the catch: after your unused sick leave is added to your actual service, any leftover time that doesn't complete a full month is dropped.

Because of this, shifting your retirement date by as little as a few days can sometimes push your total across a month boundary and capture an extra month of credit you'd otherwise lose. It's a small amount per month — but it's paid every month for the rest of your life. We walk through how this interacts with your retirement date in the best-date guide.

A note for Special Provisions

If you retire under the special provisions (LEO / firefighter / ATC), your unused sick leave is credited at the 1.0% rate, not the enhanced 1.7% rate that applies to your first 20 years of actual service. It still adds value — it's just computed as service beyond the 20-year enhanced block.