Retirees who claim Social Security before their full retirement age and keep working are discovering an unwelcome surprise at tax time: the government is withholding part of their monthly check, and many never saw it coming until the letter arrived.
If you claim benefits before full retirement age — somewhere between 66 and 67 for most people today — and you earn above a set threshold, Social Security withholds $1 of benefits for every $2 you earn over that limit.
Earn $40,000 and you're looking at roughly $8,300 clawed back.
The math gets harsher in the year you actually reach full retirement age.
The limit jumps to $62,160 for 2025, and the withholding rate softens to $1 for every $3 earned above it.
Once you hit full retirement age, the test disappears entirely — you can earn any amount with no penalty.
What trips people up is the word "withheld." That money isn't gone forever.
Social Security recalculates your benefit upward once you reach full retirement age, gradually paying back what was held.
But the adjustment shows up as a smaller monthly bump spread over years, not a lump sum.
For a household already stretched by grocery bills and rent, waiting feels like a penalty.
If you're under full retirement age and still working, run the numbers before filing for benefits.
Sometimes waiting even a few months changes the math.
The Social Security Administration's website has a calculator, and a fee-only financial planner can model your specific income.
Also worth knowing: only wages and self-employment income count toward the test.
Pensions, investment income, IRA withdrawals, and rental income don't trigger it.
So a retiree drawing from a 401(k) while working part-time might be fine, while someone picking up extra shifts could get squeezed.
The monthly benefit reduction also hits cash flow, not just paperwork.
If you're counting on that deposit to cover a car payment or a credit card minimum, a withheld check can tip a tight budget into revolving debt.
That's the real damage — not the eventual payback, but the short-term gap that forces borrowing.
One more wrinkle: if you're self-employed, the test applies to net earnings, which can be harder to estimate mid-year.
Overestimate and you may leave money on the table temporarily.
Underestimate and you could owe benefits back. **The takeaway:** the earnings test isn't a trap so much as a timing problem.
If you can wait until full retirement age to claim, the withholding question vanishes entirely.
Final Thoughts
If you can't, go in knowing the rules so a smaller check doesn't become a bigger financial headache.