You got a bonus. Then the check landed, a big slice was missing, and someone at work repeated the classic line: “bonuses get taxed at 40%.”
Here is the truth. The IRS has no special, higher tax rate for bonuses. What it has is a special withholding rule - withholding being the money your employer sends to the IRS out of your pay, in advance, before you ever see it. Withholding is a prepayment, not the final bill. When you file your return, a bonus is taxed exactly like salary, at your regular marginal rate, and any overpayment comes back to you.
That one distinction - withholding versus tax - explains nearly everything that feels strange about bonus checks. Here is how the 2026 rules actually work.
Withholding is not your tax
Every bonus has two numbers attached: the amount withheld today, and the tax you truly owe when you file. Different rules produce them, and they rarely match.
Your true tax comes from the 2026 federal tax brackets. A bonus is ordinary income, stacked on top of your salary and taxed at your marginal rate (the rate on your next dollar - marginal vs effective tax rate explains it). The withholding is only the IRS’s rough estimate, collected early. Your tax return reconciles the two: withheld too much, you get a refund; too little, you owe the difference.
The flat 22% rule
The IRS groups bonuses under supplemental wages - pay outside your regular salary, like bonuses, commissions, and severance. When a bonus is paid separately from your normal paycheck, the standard approach (IRS Publication 15 calls it the percentage method) is blunt: withhold a flat 22% for federal income tax, no matter what you earn or what your W-4 says.
A flat rate meeting a bracket system produces three outcomes:
- Your marginal rate is under 22% (the 10% or 12% brackets): too much is withheld, and the extra returns to you at filing time.
- Your marginal rate is 22%: withholding lands close to reality.
- Your marginal rate is above 22% (24% and up): too little is withheld now, so expect a smaller refund or a bill in April.
The aggregate method, in one paragraph
Some employers fold the bonus into a regular paycheck instead of cutting a separate check. Then the aggregate method applies: payroll adds the bonus to that period’s wages and withholds as if you earned that much every single period - which usually over-withholds, sometimes heavily. It reconciles at filing time exactly like the flat method. Either way, you do not pick the method; your employer’s payroll process does.
The aggregate method, with real numbers
Numbers make the over-withholding easy to see. Say you earn $78,000 a year, paid twice a month, so each regular paycheck is $3,250 of gross pay, and you file single. This month a $5,000 bonus rides along on one check, making that check $8,250.
Payroll software figures withholding by annualizing a single check - treating it as if every check this year will look the same. Your normal $3,250 check annualizes to $78,000, and tax is withheld against that. But the $8,250 bonus check annualizes to $198,000 ($8,250 x 24 pay periods). The software withholds on that check as though you earn $198,000 a year - an income that reaches into the 24% bracket - so the tax pulled from the bonus lands well above a flat 22%, often 30% or more for federal income tax alone. This is the check that makes people say their bonus was “taxed at 40%.”
Now the part that undoes the panic. You do not earn $198,000. Your real income for the year is $83,000 - your $78,000 salary plus the $5,000 bonus. After the $16,100 standard deduction, your taxable income is $66,900, which sits inside the 22% bracket. The bonus’s true federal income tax is 22% of $5,000, or $1,100 - the very amount the flat method would have withheld. The aggregate method just took more up front, and every dollar of the excess returns to you at filing.
So the two methods reach the same place - your real tax - by different roads. The flat method aims for 22% and lands close. The aggregate method overshoots when a bonus spikes one paycheck, then refunds the overshoot. Neither is a special bonus tax; one simply holds more of your money for a few months.
Bonuses over $1,000,000
For the rare and fortunate case: the flat 22% only applies to your first $1,000,000 of supplemental wages in a year. Every supplemental dollar above $1,000,000 must be withheld at 37% - the top bracket rate. That one is mandatory, and no W-4 setting changes it.
What actually happens on your tax return
At filing time, the bonus simply joins your wages on your W-2 (the annual wage statement your employer sends you and the IRS). The brackets tax the combined total, and the IRS compares what you owe against everything withheld during the year.
A concrete 2026 example. You earn $40,000, file single, and receive a $5,000 bonus as a separate check:
- Withheld from the bonus: 22% of $5,000 = $1,100 of federal income tax.
- Actually owed: after the $16,100 standard deduction, your taxable income sits in the 12% bracket, and the bonus keeps it there. True federal tax on the bonus: 12% of $5,000 = $600.
- Net effect: $500 of your money sits with the IRS until it returns in your refund.
Now flip it. If your taxable income already reaches the 24% bracket, the same bonus truly owes $1,200 - $100 more than the $1,100 withheld - so your refund shrinks or your bill grows by $100. Either way, nothing extra was taken. The timing just settles up.
The “taxed at 40%” myth
If federal withholding is 22%, why did your $5,000 bonus check shrink by so much more? Because the 22% never arrives alone:
| Taken from a $5,000 bonus | Rate | Amount |
|---|---|---|
| Federal income tax withholding | 22% | $1,100 |
| Social Security | 6.2% | $310 |
| Medicare | 1.45% | $72.50 |
| Total before state tax | 29.65% | $1,482.50 |
FICA (Social Security and Medicare tax - see what is FICA) applies to bonuses the same way it applies to salary, assuming your wages are still under the $184,500 Social Security wage base for 2026. Add state income-tax withholding in most states and the total easily passes 30% - which is how the “40%” legend got started.
But look at what that number is made of. The 22% is withholding that reconciles to your real rate later. FICA would have hit those wages in any form. Your bonus was never taxed at 40% - part of the money is simply on a round trip.
Can you do anything about it?
The withholding method belongs to your employer’s payroll, not to you. But two levers are real:
- Your W-4 (the form that tunes withholding on your regular paychecks). If a bonus will leave you badly over- or under-withheld for the year, adjust the regular checks to compensate - here is how to fill out a W-4.
- Pre-tax contributions. If your plan allows it, directing part of a bonus into a traditional 401(k) keeps income tax off that part for now. The trade-offs live in 401(k) traditional vs Roth.
It also helps to know your baseline before the bonus lands. Run your salary through the take-home pay calculator to find your marginal rate - that tells you instantly whether the flat 22% will over- or under-shoot for you.
FAQ
Are bonuses taxed at a higher rate than salary?
No. At filing time, a bonus is ordinary income taxed by the same brackets as your salary. Only the up-front withholding follows the special flat 22% rule, and any difference reconciles on your tax return.
Why did more than 22% come out of my bonus check?
Federal withholding is 22%, but Social Security (6.2%) and Medicare (1.45%) apply too, plus state withholding in most states. That stack routinely passes 30%. None of it is a special bonus tax.
Will I get some of the withholding back?
If 22% is above your marginal rate - true in the 10% and 12% brackets - yes, the extra comes back through your refund. If your marginal rate is 24% or higher, the bonus was under-withheld, and your refund shrinks or your bill grows by the difference.
Does it matter if my bonus is a separate check or added to my paycheck?
Not for your final tax - only for the timing. A separate check usually triggers the flat 22% method; folding the bonus into a regular paycheck usually triggers the aggregate method, which often withholds more up front. Both settle to the same real tax on your return, so the method changes the size of your paychecks now and your refund later, not what you ultimately owe.
Does a bonus push me into a higher tax bracket?
It can push your last dollars into one, but brackets are marginal - only the income above the line pays the higher rate. The tax on your existing salary does not change. The 2026 brackets guide shows exactly where the lines sit.
What if my bonus is more than $1,000,000?
Then federal law requires 37% withholding on the supplemental wages above the $1,000,000 mark - the flat 22% covers only the amount up to it. Your true tax still comes from your return, like any other income.
This guide is general information, not tax advice. Figures are for tax year 2026 and were last reviewed on July 5, 2026.
Sources
- IRS Publication 15 - federal withholding rules for supplemental wages (the 22% flat rate and the mandatory 37% above $1,000,000)
- IRS Rev. Proc. 2025-32 - 2026 federal income tax brackets and standard deduction
- IRS Tax Topic 751 - Social Security and Medicare withholding rates
