Bonus Tax Calculator
Your bonus is withheld at a flat 22%, but your real tax on it depends on your bracket — this shows the gap.
Potential shortfall at filing $1,000.00
Withheld from bonus $11,000.00
Actual federal tax on bonus $12,000.00
How it's calculated
Employers withhold a flat 22% on bonuses. Your real tax is the additional income tax the bonus creates at your marginal bracket. If your bracket is above 22%, you may owe the difference at filing.
Assumptions
- Bonuses are supplemental wages, withheld at a flat 22% federal rate (37% above $1M). — IRS supplemental wage rules
- Real tax is the extra federal income tax the bonus adds on top of your other income. State tax not included.
Last updated: 2026-08-07 · Tax year 2026
These assumptions follow our general methodology.
Frequently asked questions
Why was so much withheld?
Flat supplemental withholding is a default, not your real tax rate. Depending on your bracket you may get some back or owe more.