Employers withhold federal tax on a bonus in one of two ways: the percentage method (a flat 22% on amounts up to $1 million, 37% above) or the aggregate method (the bonus is combined with your regular paycheck and withheld based on your W-4). The percentage method is simpler and usually withholds less; the aggregate method can withhold more if your salary is high. Either way, your actual tax on the bonus is identical — only the withholding differs. On a $10,000 bonus, the flat method withholds $2,200 federal plus $765 FICA, for about $7,035 take-home. Compare both with the calculator below.
Bonuses are supplemental wages, and the IRS allows employers to withhold federal income tax two ways. The percentage (flat) method applies 22% to bonuses up to $1 million and 37% to any amount above $1 million. The aggregate method adds the bonus to your regular paycheck and withholds based on your W-4 as if the larger combined amount were your normal pay. Both also withhold FICA (7.65%).
| Method | Federal withholding | Best when |
|---|---|---|
| Percentage (flat) | 22% (37% over $1M) | Simple; usually less withheld |
| Aggregate | Based on W-4 + combined check | Common with manual payroll; can withhold more |
Percentage method: 22% × $10,000 = $2,200 federal, plus $765 FICA, leaving about $7,035 take-home. Aggregate method: if your regular biweekly pay is $3,000, payroll annualizes $3,000 + $10,000 for that period, which can push the withholding above 22% — sometimes $2,400-$2,800 federal — leaving a bit less. The calculator computes both so you can see the difference for your salary and pay frequency.
The aggregate method treats the combined check as if you earned that much every period, which annualizes to a high income and a high marginal bracket. Payroll then withholds at that elevated rate on the whole check, including the bonus. If your salary is already high, the aggregate method can withhold noticeably more than a flat 22%. This is purely a withholding effect — not extra tax.
No — 22% is a withholding rate, not your final tax rate. Your bonus is ordinary income, taxed at your real marginal bracket when you file. If your top bracket is 12%, over-withholding at 22% comes back as a refund; if you are in the 24%+ bracket, the flat 22% under-withholds and you may owe the difference. The myth that "bonuses are taxed at 40%" comes from confusing withholding (22% + ~7.65% FICA + state) with the final tax.
Under the percentage method, the portion of supplemental wages above $1 million in a calendar year is withheld at 37% (the top rate), and this top rate is mandatory regardless of your W-4. The first $1 million is still withheld at 22%. This mainly affects executives and large one-time payouts.
Regardless of method, your bonus owes FICA: 6.2% Social Security (up to the $184,500 wage base) and 1.45% Medicare. If your year-to-date wages already exceed the Social Security cap, the bonus escapes the 6.2% but still owes Medicare. Above $200,000 in wages, the extra 0.9% additional Medicare tax also applies.
You usually do not choose — the employer's payroll system does. Companies that pay bonuses on a separate check typically use the simpler percentage method (flat 22%). Companies that fold the bonus into a regular paycheck often use the aggregate method. If you want to know which applies, ask payroll; it affects your take-home that pay period, not your annual tax.
The most effective move is deferring the bonus into a traditional 401(k) (if your plan allows bonus deferrals), which reduces taxable income now. An HSA contribution does the same. These lower your final tax, not just withholding. You can also adjust your W-4 if a flat-22% bonus consistently under-withholds for your bracket, to avoid owing at filing.
Only in timing. Whichever method withholds more simply pre-pays more tax; the rest is refunded at filing. The method that withholds less leaves more in your pocket now but may mean a smaller refund or a balance due. Your true tax on the bonus is the same under both methods once the year is reconciled.
The calculator covers federal withholding and FICA. State income tax also applies to bonuses in most states, often at a state-specific supplemental rate (0% in Texas, Florida, Washington, and a few others). Add your state's supplemental rate for a complete net figure.
Enter your bonus amount, your regular pay for the period, your pay frequency, and filing status. The calculator shows the percentage method take-home (flat 22% + FICA) and an estimate of the aggregate method take-home (combined-check withholding), so you can compare. Remember both are withholding estimates; your final tax is settled when you file. Add state tax separately.
Under the flat 22% percentage method plus FICA, here is the take-home on common bonus sizes (assuming Social Security still applies). The aggregate method may differ based on your salary.
| Bonus | Federal (22%) | FICA (7.65%) | Take-home |
|---|---|---|---|
| $1,000 | $220 | $77 | ~$703 |
| $5,000 | $1,100 | $383 | ~$3,517 |
| $10,000 | $2,200 | $765 | ~$7,035 |
| $25,000 | $5,500 | $1,913 | ~$17,587 |
If your year-to-date wages exceed the $184,500 Social Security cap, the FICA line drops to just Medicare. The calculator compares both methods for your situation.
Whatever method withholds your bonus, the final tax is settled on your Form 1040. If the flat 22% over-withheld relative to your bracket, the excess returns as a refund; if it under-withheld (you are in the 24%+ bracket), you make up the difference. This is why two coworkers with identical bonuses but different salaries can see different refunds — their true marginal rates differ even though both bonuses were withheld at 22%. The withholding method only changes when you pay, never the total.
The most effective tax move is deferring the bonus into a traditional 401(k) if your plan allows bonus deferrals — this reduces taxable income now and grows tax-deferred. An HSA contribution does the same with triple tax advantages. You can also use a bonus to fund a traditional IRA (subject to income limits) or offset it with deductible expenses. Unlike adjusting withholding, these strategies lower your actual tax, not just the timing — making them the real way to "reduce" bonus tax.
If you have any say in when a bonus is paid, timing can matter. Receiving a bonus in a year when your other income is lower — or pushing it to January if this year is unusually high — can keep more of it in lower brackets. Employers sometimes offer this flexibility around year-end. Pair timing with retirement deferrals for the biggest effect. As always, the goal is to manage your marginal rate on the bonus, since that is what determines your real tax on those dollars.
Your final tax on a bonus depends on your full-year income and filing status, not the 22% withholding. A married couple filing jointly with wider brackets may owe less on the same bonus than a single filer. Also, if your year-to-date wages already exceed the $184,500 Social Security cap, the bonus skips the 6.2% Social Security portion — only Medicare (1.45%) applies — raising your bonus take-home. The calculator's percentage-method result assumes Social Security applies; if you are over the cap, your actual net is higher than shown.
Two coworkers can receive the same $10,000 bonus, both withheld at 22%, yet end up with different final taxes. The reason is their other income: someone in the 12% bracket gets a refund of the over-withholding, while someone in the 32% bracket owes more at filing. The withholding looks identical on the pay stub, but the return reconciles each person to their true marginal rate. This is why "how much will my bonus be taxed" has no single answer — it depends on your total income, deductions, and filing status for the year.
Beyond federal withholding, most states apply their own tax to bonuses, often at a flat supplemental rate distinct from regular wage withholding. These range from 0% in no-income-tax states to several percent in higher-tax states; some states use a graduated approach instead. The state supplemental rate stacks on top of the federal 22% and FICA, which is why a bonus in a high-tax state can show 35-40% withheld overall — again, withholding, not final tax. Add your state's supplemental rate to the calculator's federal-and-FICA result for a complete net estimate.
The percentage method applies a flat 22% federal withholding to a bonus (37% over $1 million). The aggregate method combines the bonus with your regular paycheck and withholds based on your W-4, which can withhold more if your salary is high. Your final tax on the bonus is the same either way.
No. 22% is only a federal withholding rate, not your final tax rate. Your bonus is ordinary income taxed at your real marginal bracket when you file, so you may get a refund if you are in a lower bracket or owe more if you are in a higher one.
Likely the aggregate method, which annualizes your combined paycheck and withholds at a high marginal rate, or the flat 22% plus 7.65% FICA plus state tax adding up to 30-40% withheld. That is withholding, not your final tax - the rest is reconciled on your return.
Neither changes your final tax - only the timing. The percentage method usually withholds less (more cash now, smaller refund), while the aggregate method can withhold more (less now, bigger refund). You usually do not choose; your employer's payroll system decides.
Under the percentage method, the portion of supplemental wages above $1 million in a calendar year is withheld at a mandatory 37%, while the first $1 million is withheld at 22%. This mainly affects executives and large one-time payouts.
Yes. Bonuses owe 6.2% Social Security (up to the $184,500 wage base) and 1.45% Medicare regardless of withholding method. If your year-to-date wages already exceed the Social Security cap, the bonus still owes Medicare.