Bonus Tax Calculator: Estimate Bonus Withholding & Net Pay
Frequently Asked Questions
It applies your selected main tax rate, state or local rate, and any fixed other deductions to the gross bonus. Net bonus = gross bonus - total taxes - other deductions.
In the U.S., bonuses are generally treated as supplemental wages for withholding. Employers may use a flat-rate method or an aggregate method described by the IRS in Publication 15 and Publication 15-T.
No. Withholding is only a prepayment. Your final tax is settled when you file your return, so payroll withholding on a bonus can differ from the tax you ultimately owe.
Use other deductions for payroll taxes, retirement contributions, benefit premiums, garnishments, or any fixed amounts taken from the bonus but not covered by the two percentage tax fields.
Why bonus withholding often feels higher than salary withholding
In the U.S., bonuses are generally handled as supplemental wages for payroll withholding. That means the paycheck impact can look harsher than your normal salary rate, even though the final tax is reconciled later. The IRS explains the withholding methods in Publication 15 and Publication 15-T.
"The number to focus on is net bonus after withholding and deductions, while remembering that final tax is settled on the return, not by this paycheck alone."
Withholding vs Final Tax
Payroll withholding is a prepayment, not the final tax bill. The broader IRS overview on tax withholding explains how withholding fits into your yearly return.
Supplemental Wage Methods
Employers may use a flat-rate or aggregate method for supplemental wages. Those method rules are documented in Publication 15 and Publication 15-T.
Other Deductions Matter
Retirement contributions, payroll taxes, benefits, or garnishments can materially change take-home pay. Add those fixed amounts in the other deductions field for a closer estimate.
