WISCONSIN BONUS TAX · TAX YEAR 2026
Wisconsin bonus tax calculator
Wisconsin has no single bonus tax rate: employers may withhold 3.54%, 4.65%, 5.3% or 7.65% by annual salary, or add the bonus to regular wages. On a $10,000 bonus with $75,000 of wages, a single filer has $530 of Wisconsin tax withheld, plus $2,200 of federal income tax and $765 of Social Security and Medicare, and takes home $6,505. The bonus adds $594 to the year's Wisconsin tax, so $64 less is withheld than owed.
Your bonus after tax
- Take-home bonus
- $6,505.00
- Federal income tax
- $2,200.00
- Social Security and Medicare
- $765.00
- Wisconsin tax
- $530.00
Wisconsin tax for the year
- Withheld from the bonus
- $530.00
- Added by the bonus
- $593.60
- Under-withheld
- $63.60
Wisconsin withholding by bonus size
What a single filer with $75,000 of other wages has withheld from bonuses of different sizes, and takes home.
| Bonus | Federal | Social Security and Medicare | State | Take-home |
|---|---|---|---|---|
| $1,000 | $220 | $77 | $53 | $651 |
| $5,000 | $1,100 | $383 | $265 | $3,253 |
| $10,000 | $2,200 | $765 | $530 | $6,505 |
| $25,000 | $5,500 | $1,913 | $1,325 | $16,263 |
| $50,000 | $11,000 | $3,825 | $2,650 | $32,525 |
Wisconsin tax withheld vs. owed
The Wisconsin tax withheld from a $10,000 bonus against the tax the bonus adds to a single filer's year. Over-withholding comes back in your refund; under-withholding is due when you file.
| Annual wages | Withheld | Tax added | Difference |
|---|---|---|---|
| $40,000 | $530 | $493 | $37 over |
| $75,000 | $530 | $594 | $64 under |
| $150,000 | $530 | $530 | $0 |
| $300,000 | $765 | $530 | $235 over |
Wisconsin bonus tax questions
What is the Wisconsin bonus tax rate for 2026?
Wisconsin has no single bonus tax rate: employers may withhold 3.54%, 4.65%, 5.3% or 7.65% by annual salary, or add the bonus to regular wages. On a $10,000 bonus that is $530 of Wisconsin tax.
Is a bonus taxed more than regular pay in Wisconsin?
No. When you file, a bonus is taxed at the same Wisconsin rates as the rest of your wages; only the withholding differs. For a single filer with $75,000 of wages, a $10,000 bonus adds $594 to the year's Wisconsin tax and has $530 withheld, so $64 less is withheld than owed. The rest is due when you file.
Which Wisconsin bonus rate applies to my salary?
If your employer uses Wisconsin's optional flat rates, the rate follows your estimated annual salary: 3.54% under $12,760, 4.65% under $25,520, 5.3% under $280,950 and 7.65% from $280,950. Otherwise the bonus is added to regular wages and withheld on the total.
What the calculator leaves out
- The rate tier uses annual wages before the bonus as the estimated annual salary.
- Wisconsin's default adds the bonus to regular wages; the flat percentages by annual salary are an employer option.
Federal income tax is withheld at the 22% supplemental rate, 37% on supplemental pay above $1,000,000 in a year. Social Security and Medicare treat the bonus as the year's last pay, so wages above $184,500 owe no more Social Security. Filing status changes only the annual comparison.