2026 official-source estimate
Estimate Wisconsin withholding with the 2026 Publication W-166 alternate method, Wisconsin exemptions, federal income tax, and FICA.
Quick answer
Wisconsin: Estimate Wisconsin withholding with the 2026 Publication W-166 alternate method, Wisconsin exemptions, federal income tax, and FICA. This 2026 calculator combines that state treatment with federal withholding and FICA, while showing supported employee-paid programs and known exclusions explicitly.
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Included
Limitations
Enter gross pay for one pay period, federal W-4 adjustments, and the state details shown above. Federal withholding follows Publication 15-T. Wisconsin uses the alternate percentage method in Publication W-166: annualized wages are reduced by the filing-status deduction and $400 per exemption, the 2026 brackets are applied, and the result is returned to the selected pay period before requested additional withholding.
Example: Wisconsin filing status, exemptions, additional withholding, and any valid exemption remain separate from the federal W-4 selections. The calculator does not assume any unentered benefit deduction or invent a tax result.
Weekly, biweekly, semimonthly, and monthly are the supported paycheck frequencies. “Annual salary” is an earnings input and the annual view is a simple period multiplication; neither is an annual payroll-period method. The special Form W-4 adjustment for nonresident aliens is not modeled.
State paycheck questions
Federal withholding follows Publication 15-T. Wisconsin uses the alternate percentage method in Publication W-166: annualized wages are reduced by the filing-status deduction and $400 per exemption, the 2026 brackets are applied, and the result is returned to the selected pay period before requested additional withholding.
Included in this estimate: Federal income tax withholding; Social Security and Medicare; 2026 Wisconsin alternate withholding method; Wisconsin filing status, exemptions, and requested additional withholding.
Not included in this estimate: Unentered employer benefits and unsupported deduction treatments; Interstate reciprocity exceptions; Prior-period payroll corrections; Employer-specific payroll settings.
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