Millions of Americans collect Social Security while still working, and many get an unpleasant surprise the following year: a letter saying they owe money back.
The culprit is the retirement earnings test, a rule that withholds part of your benefits when your income crosses certain thresholds before you reach full retirement age.
Here's how it actually works, who gets hit, and what you can do about it. **Two thresholds, two sets of math** In 2025, if you're below full retirement age for the entire year, the Social Security Administration withholds $1 in benefits for every $2 you earn above $23,400.
In the year you reach full retirement age, the math softens: the limit jumps to $62,160, and the withholding is $1 for every $3 above that — and it only counts earnings in the months before you hit your birthday.
Only wages and self-employment income count.
Pensions, investment income, IRA withdrawals, and most rental income don't factor in.
That trips up a lot of retirees who assume all income is treated the same. **Why the checks stop — and when they come back** The withholding isn't a penalty.
Once you reach full retirement age, the SSA recalculates your benefit upward to account for the months it withheld.
Over a normal retirement, many people recover most or all of what was held back through higher monthly payments.
If you earn far more than expected — a severance package, a big freelance year, a part-time job that turned full-time — the SSA can't adjust midstream.
It typically discovers the overpayment when employers report wages the following year, then demands repayment.
That's the part that catches households off guard.
A $6,000 clawback letter arriving in February can wreck a budget built on a fixed income. **What to do before it happens** If you're under full retirement age and working, report your expected earnings to the SSA as soon as possible.
You can do it online or by phone, and the agency will adjust your payments rather than bill you later.
If your earnings drop during the year, report that too — you may be able to get withheld benefits restored.
Higher earners should also weigh whether claiming early makes sense at all.
Someone earning $90,000 part-time will see most of their benefit withheld anyway, which weakens the case for filing before full retirement age.
Waiting often produces a bigger check permanently.
And if you do get an overpayment notice, don't ignore it.
The SSA offers waiver requests and repayment plans, and the agency has been criticized for aggressive collection.
You have appeal rights, and deadlines matter. **The bottom line** The earnings test isn't a trap so much as a cash-flow timing problem — one that hits working retirees hardest in the first year they file.
Final Thoughts
A quick call to the SSA before you claim, and an honest estimate of your income, can spare you a nasty surprise next tax season.