Bonuses are not taxed differently than regular pay in any real sense — when you file your return, every dollar of bonus money is taxed at the same ordinary income rates as your salary. What makes a bonus check look smaller is withholding. The IRS requires employers to use a special formula for “supplemental wages,” and the most common version takes a flat 22% off the top no matter what tax bracket you are in. That is a deposit, not your final tax. The difference between what gets withheld and what you actually owe gets settled when you file.
Withholding Is Not the Same as Tax Owed
The IRS groups bonuses with commissions, severance, back pay, and awards under the label “supplemental wages.” That label only controls how your employer withholds money upfront. The bonus still lands on your W-2 next to your regular wages, and it is taxed identically to salary when the return is filed.1Internal Revenue Service. Publication 15 (2026), (Circular E), Employer’s Tax Guide – Section: 7. Supplemental Wages
So the headline question has two different answers depending on what you mean. Taxed differently at year-end? No. Withheld differently from the paycheck? Yes, and that is where the confusion comes from.
The Two Withholding Methods Employers Use
When a bonus is paid separately from your regular check, the employer picks between two IRS-approved formulas. Neither one tries to match your real tax rate exactly. Both are rough estimates designed to keep your pay-as-you-go taxes in the right neighborhood.
The Flat 22% Method
Most employers use this one because it is simple. Payroll withholds 22% of the bonus for federal income tax, ignoring your W-4 and your salary. A $5,000 bonus loses $1,100 to federal withholding whether you are in the 12% bracket or the 35% bracket.1Internal Revenue Service. Publication 15 (2026), (Circular E), Employer’s Tax Guide – Section: 7. Supplemental Wages
This is where the “bonuses are taxed higher” story comes from. If your actual marginal rate is 12%, you are being over-withheld by ten percentage points and will see that money back as a refund. If your marginal rate is 32%, you are being under-withheld and will owe the difference in April.
The Aggregate Method
The second option takes more arithmetic. Your employer combines the bonus with the regular wages for that pay period, runs the combined total through the standard withholding tables using your W-4, and subtracts the tax already withheld from the regular pay. What is left becomes the bonus withholding.1Internal Revenue Service. Publication 15 (2026), (Circular E), Employer’s Tax Guide – Section: 7. Supplemental Wages
This method often withholds more than a flat 22%, because the payroll system treats the inflated pay period as though it were typical. A $10,000 bonus added to a $3,000 biweekly check makes the software think you earn $13,000 every two weeks, roughly $338,000 annualized, and it withholds at that pace. The over-withholding corrects itself on your return. It still stings in the moment.
Bonuses Above $1 Million
If your total supplemental wages from one employer top $1 million in a calendar year, a mandatory 37% rate applies to every dollar above that threshold, no matter what your W-4 says. That matches the top marginal bracket, so the withholding ends up close to the actual tax for most people in that range.1Internal Revenue Service. Publication 15 (2026), (Circular E), Employer’s Tax Guide – Section: 7. Supplemental Wages
FICA Still Applies
Federal income tax is only part of what disappears from a bonus check. Social Security and Medicare taxes come out at the same rates as on your regular paycheck.
- Social Security takes 6.2% on wages up to the 2026 wage base of $184,500. If your salary has already pushed past that cap before the bonus is paid, the bonus escapes this tax entirely.2Internal Revenue Service. Topic no. 751, Social Security and Medicare Withholding Rates
- Medicare takes 1.45% on every dollar of wages, with no cap.2Internal Revenue Service. Topic no. 751, Social Security and Medicare Withholding Rates
- An Additional Medicare Tax of 0.9% kicks in on wages over $200,000 in a calendar year. Employers start withholding it once your cumulative pay crosses that line, regardless of filing status.2Internal Revenue Service. Topic no. 751, Social Security and Medicare Withholding Rates
The Social Security cap is the source of a lot of variation. Someone earning $190,000 in base salary has already exceeded the $184,500 wage base, so a bonus paid later in the year skips the 6.2% tax. Someone earning $80,000 pays Social Security on the full bonus. That alone can shift the net on a $10,000 bonus by more than $600.
How Your Bonus Is Actually Taxed on Your Return
Whatever came out of the bonus check is a prepayment. The real calculation happens on your Form 1040, where the bonus joins the rest of your income for the year and runs through the progressive tax brackets.
The 2026 brackets for single filers run from 10% on the first $12,400 of taxable income up to 37% on amounts over $640,600, with the 22%, 24%, 32%, and 35% rates filling the space between.3Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
Your bonus does not get its own bracket. It stacks on top of your other income and gets taxed at whatever marginal rate applies to those added dollars. If your salary already puts you at $90,000 of taxable income, a $10,000 bonus falls entirely inside the 22% bracket, which covers income between $50,401 and $105,700 for a single filer in 2026. If you earned $104,000 and got the same $10,000 bonus, part of it stays in the 22% band and the rest spills into the 24% bracket.
Your effective tax rate, averaged across all your income, is always lower than your top marginal rate. Someone with $100,000 of taxable income does not pay 22% on all of it. The flat 22% withholding is a rough approximation, and it lands close to accurate for middle-bracket earners. For lower earners it is too high, so refunds come back. For higher earners it is too low, so a balance is owed.
Side Effects That Can Increase Your Real Tax Bill
A bonus can push you across income thresholds that have nothing to do with the brackets themselves. These knock-on effects are easy to overlook.
Tax Credit Phase-Outs
The Child Tax Credit begins phasing out at $200,000 of modified adjusted gross income for single filers and $400,000 for joint filers, dropping by $50 for every $1,000 over the threshold.4Internal Revenue Service. Child Tax Credit A year-end bonus that nudges you across one of those lines reduces the credit. Similar phase-outs affect education credits and other income-tied deductions.
Net Investment Income Tax
Wages are not investment income, so a bonus by itself does not trigger the 3.8% Net Investment Income Tax. But NIIT applies to investment income once your modified adjusted gross income tops $200,000 for single filers or $250,000 for joint filers. A bonus that pushes your MAGI over those thresholds pulls your dividends, rental income, and capital gains into the 3.8% tax.5Internal Revenue Service. Topic no. 559, Net Investment Income Tax
Underpayment Penalties
If flat 22% withholding leaves a big gap between what was paid in and what you owe, you can face an underpayment penalty. You are safe if you owe less than $1,000 at filing time, or if your total payments through the year covered at least 90% of the current year’s tax or 100% of the prior year’s (110% if your prior-year adjusted gross income was over $150,000).6Internal Revenue Service. Underpayment of Estimated Tax by Individuals Penalty
Ways to Soften the Hit
You cannot change the withholding method on a bonus check. Payroll rules control that. You can change the surrounding numbers.
Defer Into a 401(k)
If your employer’s plan allows it, you can direct part or all of a bonus into your 401(k). Dollars going into a traditional 401(k) reduce taxable income for the year. The 2026 elective deferral limit is $24,500, with an added $8,000 catch-up contribution for ages 50 and older and $11,250 for ages 60 through 63.7Internal Revenue Service. Retirement Topics – 401(k) and Profit-Sharing Plan Contribution Limits
Check how much room you have left. If steady paycheck contributions have you close to the annual cap already, directing a year-end bonus in can push you over. Excess deferrals that are not corrected in time get taxed twice.
Adjust Your W-4
If a bonus is coming and the flat 22% is going to over-withhold you, you can reduce withholding on your regular paychecks ahead of time. The IRS Tax Withholding Estimator at irs.gov/W4App is built for exactly this. Step 4(b) on the W-4 lets you claim extra deductions to lower withholding; Step 4(c) lets you add extra withholding if you expect to come up short.8Internal Revenue Service. Form W-4 (2026) Employee’s Withholding Certificate
Timing is the catch. Changing the W-4 after the bonus is paid does nothing to the bonus itself, though it can offset the over-withholding on remaining paychecks. Reset the form afterward if the change was meant to be temporary.
Non-Cash Bonuses and Gift Cards
Physical gifts, company trips, and gift cards are taxable too. The IRS values them at fair market value and treats them as supplemental wages, subject to the same 22% federal withholding and FICA taxes as a cash bonus.9Internal Revenue Service. Employer’s Tax Guide to Fringe Benefits
Gift cards are never tax-free, regardless of the amount. The IRS treats them as cash equivalents, so even a $25 card is technically taxable income. The employer is supposed to add the value to your W-2 and withhold accordingly, usually by pulling the tax from a future paycheck.9Internal Revenue Service. Employer’s Tax Guide to Fringe Benefits
Small, infrequent perks like occasional snacks, a holiday ham, or a company picnic can qualify as de minimis fringe benefits and stay out of income. There is no fixed dollar line. The IRS weighs value, frequency, and whether the perk looks like disguised pay. A company-paid vacation does not qualify.10Internal Revenue Service. De Minimis Fringe Benefits
State Withholding Varies
Nine states tax no wage income at all, so residents only deal with federal withholding on a bonus. Where state income tax does apply, treatment of supplemental wages differs. Some states set their own flat bonus withholding rate, ranging roughly from 1.5% to over 11%. Others require the aggregate method. The same over- and under-withholding pattern plays out at the state level, and the gap gets reconciled on the state return. If you live in one state and work in another, both may have a claim on the bonus, though most states offer credits to prevent double taxation.