Bonus Tax Calculator
Estimate how much tax will be withheld from your bonus.
Enter your numbers and select Calculate to see results.
About This Calculator
Bonuses are typically withheld at a flat federal supplemental wage rate (22% for bonuses under $1 million in a year), separate from your regular paycheck withholding. This calculator estimates your bonus withholding and net bonus amount. Note this is withholding, not necessarily your final tax liability — that depends on your total annual income.
How This Is Calculated
Federal Withholding = Bonus × 22% (IRS supplemental wage flat rate)
A $5,000 bonus has about $1,100 withheld for federal tax under the flat rate, plus FICA, netting roughly $3,517.50.
Assumptions
- Uses the IRS 22% flat supplemental wage withholding rate for bonuses under $1 million in a calendar year (37% applies above $1 million).
- Assumes the bonus is paid separately from a regular paycheck; if combined with regular wages, employers may instead use the aggregate method, which can produce a different withholding amount.
- Withholding is not the same as final tax owed — your actual tax depends on your total annual taxable income and bracket.
Frequently Asked Questions
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Last updated January 15, 2026. Results are estimates for informational purposes only — read our disclaimer.