How much tax will be withheld from my bonus in 2025?

Estimate bonus withholding for 2025 or 2026 by entering bonus amount, filing status, and expected annual income. The calculator compares flat‑rate supplemental withholding to the aggregate method to estimate tax impact, net bonus, and any shortfall you may need to cover.

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How this calculation works

  • Estimates bonus withholding using the selected method and flat rate if applicable.
  • Compares bonus tax impact to your projected marginal rate.
  • Shows net bonus and any estimated withholding shortfall.

Common mistakes and caveats

  • State and local bonus withholding are not included.
  • Employer payroll systems may apply different supplemental wage rules.
  • Large supplemental wages can trigger higher federal rates.

FAQ

Is the 22% flat rate always used for bonuses?

No. Employers may use the aggregate method or higher rates for large supplemental wages.

Last updated & sources

Last updated January 27, 2026.

TaxGuide Pro provides free state and federal tax calculators for individuals, freelancers, and small businesses.