A bonus is exciting until the deposit lands smaller than expected. It is easy to look at the pay stub, see a big chunk withheld, and conclude the bonus was hit with some special penalty rate. Usually it was not. The bonus is ordinary taxable wages; what makes it look punishing is that employers often withhold federal income tax from bonuses using supplemental wage rules, and withholding is not the same thing as the final tax you owe.
Withholding is a prepayment, not your final tax
This is the idea that resolves most bonus frustration. Withholding is tax taken out of your paycheck during the year and sent to the IRS, and to your state where applicable. Your final tax liability is calculated on your annual return, after all income, deductions, credits, and filing status are considered. If more was withheld across the year than your return requires, the excess comes back as a larger refund or a smaller balance due. If less was withheld, you owe. A bonus check can look heavily taxed in the moment while the annual return sorts out the real number.
Why 22% shows up so often
The IRS treats bonuses as supplemental wages, a category that also includes commissions, overtime pay, severance, awards, prizes, back pay, and reported tips. For 2026, IRS Publication 15 allows employers to use a flat 22% federal withholding rate on supplemental wages, when those wages are separately identified and the employee has had regular income tax withheld in the current or prior year, up to $1 million for the year. Amounts above $1 million are withheld at 37%. This is the percentage method, and it is popular because it is simple: one rate applied to the bonus rather than running it through the regular wage calculation.
That 22% is a withholding rate, not your final tax rate on the bonus. It also does not include Social Security tax, Medicare tax, state income tax, or local tax, which come out separately.
The other method can feel even steeper
Employers can instead use the aggregate method, combining the bonus with your regular wages, calculating withholding as if that larger amount were a single normal paycheck, then subtracting what was already withheld. Because payroll is briefly looking at a much bigger paycheck, the withholding can spike. That does not mean your annual income jumped into a higher bracket; it means the payroll period math for that one check was more aggressive. The return still reconciles it.
A $5,000 bonus, line by line
Suppose an employee receives a separate $5,000 bonus in 2026 and the employer uses the flat percentage method. This is simplified and leaves out state, local, and benefit items.
| Bonus pay stub item | Calculation | Amount |
|---|---|---|
| Gross bonus | Separate payment | $5,000 |
| Federal income tax withholding | 22% of $5,000 | $1,100 |
| Social Security tax | 6.2% (if below the annual wage base) | $310 |
| Medicare tax | 1.45% | $72.50 |
| Net before state tax and other deductions | $5,000 minus the above | $3,517.50 |
You can see why a bonus feels heavily taxed: even before state tax, local tax, 401(k) deductions, or garnishments, the net is well below the gross. But the $1,100 of federal withholding is a payment toward your annual tax, not a permanent 22% tax on the bonus. And the gap between gross and net is not one “bonus tax.” It bundles federal withholding, Social Security, Medicare, and often state tax, local tax, and any retirement contribution your plan applies to bonus pay, which reduces the cash deposit but adds to your savings.
Will you get any of it back?
It depends on how the full year comes together. If your total payments exceed your final tax, some of the withholding returns as a refund. If it was needed to cover your actual tax, you keep none of it back. And for higher earners whose marginal rate is above 22%, the flat bonus withholding may actually be too low, leaving a balance due. A large bonus raises both total income and total withholding in the same year, so whether it helps or hurts your refund is a whole-return question, not a single-paycheck one.
It also helps to separate two ideas that get tangled in bonus panic. Supplemental withholding explains the paycheck. Marginal brackets explain how the income sits on your annual return, and a bonus never taxes all of your income at the top rate. That distinction is covered in Tax Brackets Are Not Buckets.
Before you touch your W-4
It is tempting to change your W-4 to offset a big bonus withholding, but do it carefully. A W-4 change affects future paychecks, and cutting withholding too aggressively can create an under-withholding problem later in the year. The better sequence is to estimate the full year first: review year-to-date income and withholding, expected remaining wages, the bonus, spouse income, side income, credits, deductions, and state tax, then judge whether your current setup points to a large refund, a balance due, or a reasonable result. If your aim is to fine-tune toward a smaller refund or avoid a surprise, Big Refund or Bigger Paycheck walks through that trade-off. Use the PaycheckNet payroll calculator for the paycheck view and the PaycheckNet tax calculator for the annual estimate before changing anything. State supplemental withholding varies too, so the same $5,000 bonus nets differently across states; the PaycheckNet state tax tables can help there.
The takeaway: a bonus looks overtaxed because supplemental withholding is front-loaded and visible, while the real result is settled on your return. Read the stub line by line and estimate the full year before assuming anything went wrong.
Sources and notes
This article was reviewed against IRS Publication 15 for 2026, including the supplemental wage rules. Separately identified supplemental wages may generally be withheld at a flat 22% when the employee has had regular income tax withholding and supplemental wages are $1 million or less for the year; amounts above $1 million are withheld at 37%. Supplemental wages remain subject to Social Security, Medicare, and FUTA taxes.
This article is for general educational purposes only and should not be treated as personal tax, legal, or financial advice. Tax rules can change, and your situation may depend on your income, filing status, state, employer, and other factors.
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