Marcus is 61, a GS-13 with a little over 29 years of service, and he is sitting across from his HR specialist with a printout of his leave balance. He has 3,412 hours of unused sick leave. For years he assumed that pile was worth nothing. Coworkers told him the agency would not pay it out, so he used it when he needed it and never gave it another thought.

Then the specialist slides over an estimate. His annuity is higher than he expected, and the difference traces back to those hours.

That is how most people learn about sick leave credit: late, and with a mix of relief and "why didn't anyone tell me this earlier?"

What the credit actually does

When you retire on an immediate annuity, OPM converts your unused sick leave into additional months of service and adds them to your actual service for computing the annuity. Nothing is paid out in cash. Your annuity is simply calculated as if you had worked longer.

The conversion is roughly 174 hours per month, based on a standard work year of 2,087 hours. OPM publishes a conversion table, and that table is what your agency will use, so treat my arithmetic as a close estimate.

Marcus's 3,412 hours works out to about 19 months. His 29 years of actual service becomes roughly 30 years and 7 months for computation purposes.

The numbers

Say Marcus's high-3 average salary is $120,000.

  • Without sick leave credit: 29 years at 1% = 29% of $120,000, or $34,800 a year.
  • With about 1 year and 7 months added: roughly 30.58 years at 1% = about $36,700 a year.

That is nearly $1,900 more every year, for life, and it rises with cost-of-living adjustments. Over a 25-year retirement, it adds up to real money. And if Marcus qualifies for the 1.1% factor by retiring at 62 or later, each credited month is worth a bit more.

Where it counts, and where it does not

This is the part people get wrong, so read it slowly.

Sick leave credit counts toward the amount of your annuity. It does not count toward whether you are eligible to retire. If you are one year short of your minimum retirement age and service requirement, 2,000 hours of sick leave will not close the gap.

It also generally does not feed the FERS annuity supplement, which is based on your actual FERS service. And it does not change your high-3 salary, because it is time, not pay.

The 1.1% multiplier at 62 deserves its own question. The 20-year threshold has specific rules, and if you are close to that line, ask your HR office or OPM to run the numbers both ways before you commit to a retirement date. Do not rely on a coworker's memory here.

FERS versus CSRS

CSRS employees have had full credit for unused sick leave for a long time. Under FERS, the rule was different until recently. For retirements before January 1, 2014, FERS credited only 50% of unused sick leave. For retirements on or after that date, it credits 100%, the same as CSRS.

That change matters if you are reading older articles or talking to a retiree who left before 2014. Their experience may not match yours.

For CSRS employees, there is one more wrinkle. The annuity formula caps at 80% of high-3, and sick leave credit counts toward that cap. If you are already near the maximum, extra sick leave will not increase your annuity. In that case, using your leave when you need it costs you nothing.

The hoarding trap

A full-time employee earns 4 hours of sick leave per pay period, or 104 hours a year. Someone who never takes a sick day over 30 years would pile up about 3,120 hours, or roughly 18 months of credit. In practice, almost nobody gets there, and almost nobody should try.

Skipping the doctor, coming to work contagious, or dragging through a recovery to protect a balance is a bad trade. One month of credit is worth roughly 0.083% of your high-3 at the 1% rate. On a $100,000 high-3, that is about $83 a year per month of credit. It is a nice bonus, but it is not worth your health or your family's.

Use sick leave when you are sick. Let whatever remains work for you at the end.

How to plan around it

A few practical steps:

  1. Check your balance a year or two before retirement. Your pay system or leave and earnings statement shows it. Know the number so there are no surprises.
  2. Ask for an estimate that includes sick leave credit. Many annuity estimates show it separately, and some online calculators leave it out. If you are comparing retirement dates, make sure the comparison is apples to apples.
  3. Consider the timing of planned leave. If you are weighing a scheduled procedure in your final months, remember that sick leave you use is sick leave you will not convert. Your health comes first, but it helps to know the tradeoff.
  4. Do not forget the 3-year question if you leave early. If you separate before retirement and later return to federal service, your sick leave can be restored. If you leave for good without an annuity, it is gone. Ask HR how your situation applies.

How it fits with the rest of your plan

Sick leave credit is a quiet piece of your pension, and it works alongside your Thrift Savings Plan balance and any IRA savings. A larger annuity can reduce how much you need to draw from your TSP in the early years, which may help your savings last longer or give you more flexibility with withdrawal timing and taxes. It will not change your TSP balance or your contribution limits. For current TSP rules and figures, see tsp.gov, and for tax treatment of annuity income and withdrawals, see irs.gov.

For Marcus, the credit did not change his retirement date, but it did change his comfort level. The extra $1,900 a year covers his Medicare Part B premium with room to spare. He told his HR specialist he wished he had known earlier, though not because he would have done anything differently. He just would have stopped feeling guilty about the three times he took a sick day.

Know your balance. Ask for the estimate. And use the leave when you need it.