Free 2026 Bonus Tax Calculator

1. Enter the bonus amount before withholding.
2. Add year-to-date wages so the Social Security wage base and Additional Medicare threshold can be estimated.
3. Review the federal withholding, FICA, and estimated net bonus.

Apply the IRS supplemental wage flat withholding rate, use the higher supplemental rate only for bonus dollars above the annual $1 million supplemental wage threshold, then estimate employee FICA using the Social Security wage base and Medicare rates.

A $10,000 bonus with $80,000 of year-to-date wages is estimated with 22% federal supplemental withholding plus employee Social Security and Medicare withholding.

Year scope: Use the year selector or year note on the calculator itself when comparing thresholds, rates, deductions, or credit limits.

This calculator is maintained against official IRS, SSA, and other primary-source guidance where applicable. Review the sources page and editorial methodology page to verify update practices.

Estimate how much of a bonus may be withheld for federal supplemental wages, Social Security, Medicare, and Additional Medicare tax. This is useful before a bonus, commission, severance, or award payment hits payroll.

Estimate only. Payroll systems can use aggregate withholding or other rules depending on how supplemental wages are paid.