Wisconsin Bonus Tax Calculator:

Yes. Wisconsin imposes state personal income tax on wages, so employers generally withhold Wisconsin state income tax from bonus payments when applicable. Bonuses are also treated as taxable wages for federal payroll tax purposes.

When a bonus is paid, federal withholding, Social Security, Medicare, Additional Medicare, and Wisconsin state income tax withholding may apply. You can use the calculator above, powered by Beyond HCM, to estimate federal withholding, Wisconsin withholding, and take-home pay for bonus payments. The calculator uses 2026 federal payroll assumptions and current Wisconsin withholding estimates.

How to Calculate Bonus Tax in Wisconsin

Supplemental wages—including bonuses, commissions, overtime pay, back pay, and certain additional wage payments—are generally treated as wages for withholding purposes.

For Wisconsin withholding:

– Wisconsin imposes state income tax on wages
– Wisconsin does not have a separate flat state bonus tax rate
– Wisconsin bonus withholding may be estimated using the state’s withholding method for taxable wages
– Wisconsin withholding may vary based on taxable wages, Wisconsin withholding status, exemptions, payroll frequency, deductions, and payroll setup
– Wisconsin does not have a statewide employee Temporary Disability Insurance (TDI) contribution included in this calculator

For federal withholding:

– 22% applies to most supplemental wages
– 37% applies to supplemental wages above $1 million in a calendar year

Key Information on Wisconsin Bonuses

How Are Bonuses Paid in Wisconsin?

Employers may issue bonuses through:

– Check
– Direct deposit
– Pay card

How Do Bonuses Work?

Bonuses are treated as taxable compensation. They are generally subject to:

– Federal income tax withholding
– Wisconsin state income tax withholding
– Social Security tax
– Medicare tax
– Additional Medicare tax, when applicable

They are typically reported on the employee’s Form W-2 at year-end.

What Is the Wisconsin Bonus Tax Rate?

Wisconsin does not use a separate flat state bonus tax rate. Instead, bonus payments are generally treated as taxable wages and may be subject to Wisconsin income tax withholding.

For 2026:

– Wisconsin state income tax withholding may apply to bonus payments
– Federal supplemental withholding generally applies to bonus payments
– FICA taxes, including Social Security and Medicare, generally apply
– Additional Medicare may apply once the employee exceeds the applicable federal threshold
– Wisconsin withholding may depend on the employee’s Wisconsin withholding status, exemptions, taxable wages, deductions, and payroll setup

Are Bonuses Taxed Differently Than Standard Pay?

At the Wisconsin level, bonuses are generally treated as taxable wages for withholding purposes. They may be processed together with regular wages or handled as supplemental wages, depending on the employer’s payroll method.

At the federal level, bonuses may be taxed using the supplemental wage method, typically 22% when paid separately, subject to the higher $1 million rule.

How Much Tax Is Taken Out of a Bonus?

For most bonus payments in Wisconsin, estimated withholding may include:

– 22% federal supplemental withholding in most cases
– Wisconsin state income tax withholding
– Social Security tax
– Medicare tax
– Additional Medicare tax, if applicable

The exact amount taken from a bonus may vary depending on the employer’s payroll setup, the employee’s year-to-date wages, federal thresholds, Wisconsin withholding elections, exemptions, deductions, and how the bonus is processed.

Important

This calculator is provided for informational and estimation purposes only. Actual payroll tax withholdings and deductions may vary based on an employee’s tax elections, payroll setup, federal withholding rules, Wisconsin withholding rules, exemptions, deductions, and how the bonus is processed. Employers should consult a qualified tax, legal, or payroll professional for official calculations.

If you need help with payroll processing, withholding setup, or tax compliance in Wisconsin, the Beyond HCM team is available to help.

Estimate only — not legal or tax advice. Need help managing Wisconsin payroll more confidently? Contact Beyond HCM for support.