Bonus Tax Calculator
Estimate the taxes withheld from a bonus using the IRS flat supplemental wage rate.
The IRS lets employers withhold a flat 22% federal rate on supplemental wages up to $1 million — your actual tax liability at filing may differ once combined with your regular income.
About the Bonus Tax Calculator
The Bonus Tax Calculator gives you an instant answer from just a few inputs — bonus amount, state. It runs entirely in your browser, so the numbers you enter stay private and never touch a server, and the result recalculates the moment you change a value. It's free to use with no sign-up, no limits, and nothing to install.
Worth Knowing
Bonuses feel taxed harshly because employers usually withhold them at the IRS flat supplemental rate of 22% (37% above $1 million), often higher than your normal paycheck withholding. But that's withholding, not your actual tax — a bonus is ordinary income taxed at your real marginal rate when you file. If the flat 22% withheld more than you owe, you get the difference back as a refund; the bonus isn't taxed at some special punitive rate.
How to Use
- Enter Bonus amount into the first field of the Bonus Tax Calculator.
- Fill in the rest: State.
- Your result appears instantly as you type — there's no submit button or page reload.
- The IRS lets employers withhold a flat 22% federal rate on supplemental wages up to $1 million — your actual tax liability at filing may differ once combined with your regular income.