United States · 2026 Payroll

2026 Bonus After-Tax Calculator

Estimate a bonus after the IRS optional 22% federal supplemental-wage withholding method plus employee FICA.

2026 IRS rulesUS dollarsMethodology ↓

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Enter your values and calculate to see the result.

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Supplemental-wage assumption

This estimator uses the IRS optional 22% federal withholding rate for qualifying supplemental wages. Different rules can apply, including a mandatory 37% rate to supplemental wages above the applicable $1 million threshold.

Official methodology

Federal income-tax withholding uses the IRS 2026 Publication 15-T percentage method for automated payroll systems and a 2020-or-later Form W-4. Social Security uses 6.2% up to the 2026 $184,500 wage base; Medicare uses 1.45% with no wage base, and employer withholding of Additional Medicare Tax begins above $200,000 of wages.

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How to use this calculator

  1. Set Bonus amount (default 5000).
  2. Set Prior 2026 Social Security wages (default 50000).
  3. Select Calculate to update the result. Reset restores the starting values.

Educational estimate. Actual payroll can differ because of pretax benefits, taxable fringe benefits, state/local taxes, W-4 details, payroll rounding and employer systems.

Maintained by the CalculatorsOnline Editorial Team. Read our methodology policy.