How Much Tax Will You Pay on a $20,000 Bonus?
A $20,000 bonus leaves about $14,070 after the 22% federal supplemental withholding and 7.65% in Social Security and Medicare — 70% of the total.
On a $20,000 bonus, most US employers withhold the flat supplemental rate of 22% — that is $4,400 — and payroll tax takes another $1,530 for Social Security and Medicare. With no state income tax, $14,070 lands in the account. Add a state, and a typical 5% rate takes $1,000 more.
The important part: 22% is a withholding rate, not a tax rate. The bonus is ordinary income, so at the end of the year it is taxed at whatever bracket it falls into. Someone in the 12% bracket gets much of that $4,400 back as a refund; someone in the 32% bracket will owe more. The calculator below opens on this bonus — change the federal rate to your real bracket, add your state, and put any 401(k) or charity deduction in the deductions field.
Bonus Tax Calculator
Estimate Bonus Withholding & Net Pay
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Net Bonus
$0
Effective Deduction Rate: 27.0%
Bonus Breakdown
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What a $20,000 bonus is worth in your state
Federal withholding at the flat 22% supplemental rate plus 7.65% payroll tax, with state income tax layered on top.
| State income tax rate | State tax | You keep | Share of the bonus |
|---|---|---|---|
| 0% | $0 | $14,070 | 70% |
| 3% | $600 | $13,470 | 67% |
| 5% | $1,000 | $13,070 | 65% |
| 7% | $1,400 | $12,670 | 63% |
| 9% | $1,800 | $12,270 | 61% |
Frequently Asked Questions
- About $5,930 in total if your employer uses the flat method and you have no state income tax: $4,400 federal withholding plus $1,530 in Social Security and Medicare, leaving $14,070. In a state with income tax, expect $1,000 more at a 5% rate.
- They are not — they are withheld at 22%. The IRS lets employers treat a bonus as supplemental income and apply one flat rate instead of running it through your usual payroll formula. It is administrative convenience, and it is fixed by statute rather than adjusted each year. The tax you actually owe on the bonus is decided by your total income for the year, and the difference is settled on your return.
- If your marginal rate is under 22%, yes — the excess comes back as part of your refund. If you are in the 24% bracket or higher, 22% was not enough and the balance is due in April; a large bonus can even push part of your income into the next bracket. This is the single most common surprise with bonuses, in both directions.
- The other option an employer may use: the bonus is added to your regular paycheck and the whole amount is withheld as if you earned that much every period. Because payroll formulas annualise, that usually withholds far more than 22% on a large bonus — the money is not lost, but it is tied up until you file. If your payslip shows much less than $14,070 on a $20,000 bonus, this is normally why.
- Only by lowering taxable income, not by changing the withholding. Directing the bonus into a traditional 401(k) or HSA up to the annual limit removes it from taxable income entirely; a charitable donation in the same year works if you itemise. Deferring the bonus into next year only helps if next year is a lower-income year. Note that Social Security stops at the $183,600 wage base, so a bonus paid after you cross it carries only the 1.45% Medicare part.
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