Wisconsin
bonus tax calculator.

Use Wisconsin’s employer-elected supplemental percentage based on estimated annual gross salary.

Your cash bonus

Gross bonus ($)

Regular gross already paid in this period ($)

Bonus payment date

Regular pay frequency

Federal methodFederal income tax was withheld from regular wages this or last year, and this bonus is separately identifiedFederal filing status

SS wages BEFORE regular pay and bonus ($)

Medicare wages BEFORE regular pay and bonus ($)

Earlier supplemental wages this year ($)

Federal prior wages exclude both the entered regular pay and bonus. Earlier supplemental wages include common-control employers. W-4 Step 2 is off, adjustments zero. No earlier bonus in this same pay period.

Wisconsin settings

The state method below is independent of the federal method.

Employer estimated annual GROSS salary ($)

Additional income withholding on bonus ($)

Other incremental local / payroll deductions ($)

Employer uses Wisconsin’s alternative supplemental method and supplied the annual GROSS salary estimate entered below.Payroll confirmed all remaining deductions attributable to this bonus, including zero if none; no duplicated state/county/premium amountsI live and work in Wisconsin. This is a separately paid cash W-2 bonus AFTER the entered regular wages, in the same payroll period, with no earlier bonus that period. No pretax benefit deductions, state exemptions, stock awards, gross-up or cross-state wages apply.

State treatment of this bonus

The alternative method uses 3.54%, 4.65%, 5.30% or 7.65%, selected using the employer’s annual gross salary estimate. These are payroll bands, not filing-status income-tax brackets.

A worked bonus example

For a $5,000 bonus, an annual salary estimate of $25,520 selects 5.30% and produces $265 state withholding.

When this estimate does not apply

Enter the employer’s estimate, not annual taxable wages or the bonus itself. Aggregate and other employer methods are outside this calculator’s state method.

Regular resident W-2 wages, separately paid cash bonus after the entered regular wages, in the same payroll period only. A bonus paid before those regular wages is not supported. No benefit changes, state exemptions, stock awards, gross-up, or earlier supplemental payment in that period. Federal assumptions are shown in the form. Withholding is a payment toward tax, not the final tax bill.

Sources and related tools

Reviewed August 31, 2026. Federal bonus methods · Coverage and methodology