Why Is My Bonus Taxed So Much?
Updated July 20, 2026 · Figures reflect 2026 IRS, SSA, and state tax data — see our methodology.
You were promised a $10,000 bonus and roughly $7,000 showed up. The natural conclusion — "bonuses are taxed at a higher rate" — is wrong, and understanding why will save you from bad decisions like turning down bonus-heavy offers. The truth: bonuses are taxed exactly like salary; they are only withheld differently, and the difference between withholding and actual tax comes back to you (or gets settled) when you file.
Supplemental wages: a different withholding rulebook
The IRS classifies bonuses, commissions, severance, prizes, and most one-off payments as supplemental wages. Regular salary withholding is fine-tuned by your W-4, but supplemental pay would confuse that math — a $10,000 bonus in one biweekly period looks to payroll software like a $260,000 annual salary. So the IRS gives employers two blunt-but-simple methods instead.
Method 1: The flat percentage method (most common)
If your bonus is paid separately from regular wages, most employers simply withhold a flat 22% for federal income tax on supplemental wages up to $1 million in a year. Anything above $1 million must be withheld at 37% — no employer discretion.
Method 2: The aggregate method
If the bonus is lumped into a regular paycheck, payroll adds it to that period's wages and withholds as if you earned that total every period. Annualizing one fat paycheck pushes the withholding formula into high brackets, so this method usually withholds more than 22% — which is why the same bonus can net you less at one company than another. Either way, it is still just withholding.
Where your $10,000 actually goes
Federal withholding is only part of the bite. A separate $10,000 bonus under the percentage method typically loses:
| Deduction | Rate | Amount |
|---|---|---|
| Federal supplemental withholding | 22% | $2,200 |
| Social Security | 6.2% | $620 |
| Medicare | 1.45% | $145 |
| State supplemental withholding | 0–11%+ | $0–$1,100+ |
In a no-tax state like Texas you keep about $7,035 (29.65% withheld). In California — whose supplemental rate on bonuses is a startling 10.23% — you keep closer to $6,000. Every state's rate is built into our bonus tax calculator, which shows your exact take-home for any bonus amount.
Why the 22% is usually not your real tax
Your actual tax on the bonus is your marginal rate — the bracket your last dollar of annual income lands in. Two workers receiving the same $10,000 bonus:
- Maria, $55,000 salary (12% bracket): her true federal tax on the bonus is mostly 12–22%. The flat 22% withholding over-collects, and the difference lands in her refund the next spring.
- David, $250,000 salary (35% bracket): his true tax on the bonus is 35%. The 22% withholding under-collects by $1,300 — he will owe it at filing, and high earners with large bonuses sometimes trigger underpayment penalties this way.
So "my bonus was taxed at 40%" is really "about 30–40% was withheld, and the true rate settles later." For most people below the 24% bracket, bonus withholding means a bigger refund, not a lost bonus.
FICA: the part that is real and final
Social Security and Medicare apply to bonuses at the same rates as salary — 6.2% and 1.45% — and unlike income tax withholding, these are generally final. One exception cuts in your favor: if your salary has already passed the 2026 Social Security wage base of $184,500 by the time the bonus pays out, no Social Security is taken from it at all. Year-end bonuses for high earners often arrive 6.2% "cheaper" for exactly this reason.
Ways to keep more of a bonus (legitimately)
- Redirect it into your 401(k). Most payroll systems let you set a separate contribution percentage for bonuses. Contributing dodges federal and state income tax now (though not FICA) and is the single biggest lever. See how 401(k) contributions change your paycheck.
- Ask about payment timing. If you are near a bracket threshold or the Social Security wage base, a January vs. December payout can change the real tax.
- Fix your W-4 instead of fearing the bonus. If bonuses are a regular part of your comp, adjusting regular-pay withholding smooths the year so you neither loan the IRS money nor owe in April.
- HSA contributions (if eligible) reduce taxable income too, and payroll-routed ones even skip FICA.
Frequently asked questions
Are bonuses taxed at 40%?
No. Roughly 30–40% is withheld once federal 22%, FICA 7.65%, and state rates stack up — but your true tax is your ordinary marginal rate, reconciled on your tax return. If that is below the withholding, the difference comes back as a refund.
Do I get bonus withholding back?
If your total withholding for the year exceeds your actual tax — the common case for earners in the 10–22% brackets — yes, automatically, when you file. There is no separate form for "bonus tax."
Why did my coworker's identical bonus net more than mine?
Different states, different withholding methods (percentage vs. aggregate), or one of you crossed the Social Security cap. Same gross bonus, four different nets is completely normal.
Does a bonus push me into a higher tax bracket?
Only the dollars above the threshold get the higher rate — a bonus can never make your existing salary taxed more or shrink your total take-home. Brackets are marginal; see how paycheck taxes work.
Estimate your own: enter any amount and state into the bonus tax calculator for a 2026 withholding breakdown in seconds.