Wisconsin Bonus Tax Calculator 2026
Updated for the 2026 tax year · Last updated June 11, 2026
Your bonus take-home in Wisconsin
$6,513
You keep 65.1% of a $10,000 bonus · $3,487 withheld (34.9%)
| Bonus amount | $10,000 |
| Federal withholding (22%) | −$2,200 |
| Social Security (6.2%) | −$620 |
| Medicare (1.45%) | −$145 |
| Wisconsin state tax | −$522 |
| Net bonus | $6,513 |
Uses the IRS percentage method (flat 22% federal withholding on bonuses up to $1M) plus FICA and Wisconsin state withholding. This is withholding at payout — your final tax is settled when you file. Single filer, no pre-tax deductions. For guidance only, not tax advice.
How bonuses are taxed in Wisconsin
Wisconsin has no separate flat bonus rate — it uses the aggregate method, taxing your bonus at the marginal rate of your regular income tax brackets.
Bonus take-home examples in Wisconsin
$5,000 bonus
$3,261 take-home
$1,739 withheld · you keep 65.2%
$10,000 bonus
$6,513 take-home
$3,487 withheld · you keep 65.1%
Assumes a single filer with $65,000 base salary.
Wisconsin bonus tax FAQ
How much is a $10,000 bonus taxed in Wisconsin?
For 2026, a $10,000 bonus in Wisconsin has about $3,487 withheld (34.9%), leaving roughly $6,513 — assuming a single filer earning $65,000 in base salary.
How are bonuses taxed by the federal government in 2026?
The IRS treats bonuses as supplemental wages. Employers usually use the percentage method: a flat 22% federal withholding on bonuses up to $1 million, and 37% on any amount above $1 million, plus Social Security (6.2%) and Medicare (1.45%).
Does Wisconsin tax bonuses?
Yes. Wisconsin taxes bonuses using the aggregate method — the bonus is taxed at the marginal rate of your income tax brackets.
Why was so much withheld from my bonus?
Bonus withholding often looks high because the flat 22% federal rate can exceed your normal paycheck withholding. It is only withholding, not your final tax — if too much was withheld, you get it back when you file your return.
Related calculators
- Wisconsin paycheck calculator
- Minnesota bonus tax calculator
- Illinois bonus tax calculator
- Michigan bonus tax calculator
See all states on the bonus tax calculator hub.
Sources: IRS 2026 supplemental wage withholding (22% / 37%); SSA 2026 ($184,500 Social Security wage base); Wisconsin Department of Revenue; Tax Foundation, 2026 State Individual Income Tax Rates and Brackets (Feb 2026).
State tax assumptions: Wisconsin's sliding standard deduction phase-out is not modeled — the full $13,960 is applied at all incomes (state tax understated by roughly $300 at $65k).