2026 WASHINGTON BONUS TAX CALCULATOR
Washington Bonus Tax Calculator 2026
Estimate how much of your Washington bonus you keep after federal supplemental withholding, FICA, and Washington state taxes. Compare the IRS percentage method (22% federal) vs aggregate withholding.
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How Washington taxes your bonus paycheck
Washington has no state income tax, so bonus withholding only includes federal supplemental rate (22%) plus FICA taxes.
Example: $10,000 bonus on $$75,000 salary
Single filer, biweekly pay — percentage method (22% federal supplemental + state supplemental rate).
| Gross bonus | $10,000 |
| Federal tax withheld | -$2,200 |
| State tax withheld | $0 — no state income tax |
| Social Security | -$620 |
| Medicare | -$145 |
| Net bonus (percentage method) | $7,035 |
Aggregate method net bonus on this example: $7,035 (engine-computed delta vs salary-only withholding).