Millions of Americans claim Social Security before their full retirement age and keep working, often without realizing that part of their check can be temporarily withheld.
The rule behind that surprise is called the earnings test, and it trips up roughly one in five early filers.
If you claim benefits before full retirement age and earn above an annual limit, the Social Security Administration withholds $1 in benefits for every $2 you earn over that cap.
In the year you reach full retirement age, the math loosens: $1 withheld for every $3 earned above a higher threshold, $62,160, until the month you hit full retirement age.
Once you reach full retirement age, the SSA recalculates your benefit upward to account for the months it didn't pay out.
Most people who live a normal lifespan get that money back over time, though the adjustment arrives gradually, not as a lump sum.
Only wages from a job and net self-employment income count.
Pensions, investment dividends, IRA withdrawals, rental income, and other government benefits don't.
That distinction catches retirees who assume all their income is being tallied.
The timing wrinkle is where people get burned.
The test is applied monthly in your first year of claiming, so a single large bonus or a few months of part-time work can trigger withholding even if your annual total looks modest.
If you're planning to work heavily in your first year of benefits, running the numbers before you file can save real money.
There's also a practical reason to care beyond the withheld dollars.
The earnings test is one of the main reasons retirees file early and then regret it.
Claiming at 62 permanently reduces your monthly check, sometimes by 30 percent compared to waiting until full retirement age.
If you're still earning a solid salary, delaying your claim can be the single biggest raise available to you.
For 2026, watch for the annual inflation adjustment to these thresholds.
The limits tend to rise modestly each year, which means the test bites slightly less, but the underlying math doesn't change.
If you're close to full retirement age, the penalty softens considerably, and the month you hit that milestone, the test disappears entirely.
One more thing: the test only applies to earned income before full retirement age.
Once you hit that date, you can earn any amount with no withholding, which is why some workers deliberately time their retirement to that month.
If you're already receiving benefits and working, check your earnings estimate against the threshold now, not in April when a withholding letter arrives.
The SSA's online calculator can show you the impact in a few minutes.
The earnings test isn't a punishment, but it sure feels like one when your check shrinks.
Final Thoughts
Understanding the thresholds and timing gives you a rare chance to plan around a rule most people only learn about after it costs them.