For more on how deductions change taxable wages, see our
pre-tax vs. post-tax deductions guide.
Wisconsin Paycheck Tax Calculator: How WI Withholding Works
A Wisconsin paycheck calculator has one state line
to get right, but it's trickier than it looks. On your pay stub
you'll see
WI SIT or WI state withholding,
and the amount depends on your WT-4 and on how far your pay has
pushed the standard deduction down. Our
pay stub abbreviations list
explains the other codes.
Federal Withholding for Wisconsin Paychecks
Federal withholding uses your Form W-4 and the 2026 federal
brackets. The calculator supports filing status, Step 2(c), Step 3
credits and Step 4(a), 4(b) and 4(c). If you claim the new overtime
or tips deductions, our
W-4 Step 4(b) worksheet guide
shows how to enter them, and our
2026 federal tax withholding guide
covers the rest.
Working Across State Lines
Wisconsin has reciprocal agreements with
Illinois,
Indiana,
Kentucky and
Michigan.
If you live in one of those states and work in Wisconsin, file Form
W-220 with your employer and you'll pay income tax only to your home
state; tick "exempt" in the calculator to see that paycheck.
Minnesota's agreement ended in 2010, so
Minnesota
residents working in Wisconsin have Wisconsin tax withheld and
claim a credit at home.
Bonuses
Employers usually add a bonus to regular pay and run the formula, or
withhold at a flat rate set by their payroll system. Federal tax,
often a flat 22%, and FICA apply too. See
why bonuses are taxed so high.
Employer Payroll Costs in Wisconsin
Employers pay state unemployment insurance
on a capped amount of each employee's wages; it isn't taken from
your check. At year-end, our
W-2 form generator
can use the same wage and withholding totals.
Why Your Actual Wisconsin Paycheck May Differ
This calculator is a close estimate, not your employer's payroll
run. Your WT-4 on file, whether your employer uses the wage bracket
tables instead of the formula, benefit elections and a 27th
biweekly payday in some years can all move the result a little.
Three-paycheck months
change monthly cash flow but not the tax on each check. For a full
checklist, see why your paycheck is lower than expected.
Official 2026 Wisconsin Payroll Sources
Payroll facts on this page are checked against
Wisconsin Publication W-166, the 2026 withholding tax guide,
the Wisconsin Department of Revenue withholding calculator,
the Department of Workforce Development unemployment tax page
and IRS Publication 15-T for 2026.
Reviewed September 25, 2026.