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Bonus Withholding Estimator
Educational bonus withholding estimate from bonus amount × user-entered supplemental rate. No IRS flat rate is hardcoded.
Limitation: Educational estimate only—not tax advice and not an IRS determination.
How to Estimate Bonus Withholding
Use the bonus amount and a supplemental rate from your employer or planning assumption.
Choose a display currency.
Rate is not automatic
If your employer uses a flat supplemental method, look up the applicable percent for the year and enter it yourself.
What Net Bonus Means Here
Net bonus is gross bonus minus estimated withholding at your entered rate. State taxes, benefits, and other deductions are not included unless folded into the rate you chose.
Bonus Tax Examples
Five thousand bonus at 22%
Bonus and rate
Net bonus
5,000 × 0.22 = 1,100; 5,000 − 1,100 = 3,900.
Zero withholding scenario
Bonus and rate
Net bonus
A 0% rate leaves the full bonus.
Withholding ≠ final tax
Year-end liability can differ from paycheck withholding depending on total income and credits.
Frequently Asked Questions
Still have questions about this calculation?
Try the CalculatorBonus Tax Formulas
No IRS supplemental wage table is embedded.
Formula
Estimated withholding
bonusAmount × supplementalWithholdingRatePercent ÷ 100
Estimated net bonus
bonusAmount − estimatedWithholding
Scientific Background
Assumptions: a single flat percent applies to the entire bonus in this scenario. Limitations: not aggregate withholding method modeling, not state supplemental rules, and not final tax liability. See IRS.gov for supplemental wages context.
Sources & review
Bonus Tax Estimator documents the references behind its formulas and assumptions. Always treat results as educational estimates, not personalized professional advice.
Last reviewed
July 22, 2026
IRS digital assets / tax reference
Internal Revenue Service (IRS)
https://www.irs.gov/newsroom/tax-tips-for-employees-receiving-bonuses-or-awardsFree Calculator Hub methodology
Free Calculator Hub
/methodology
See our methodology and corrections policy.