Wisconsin state income tax calculator
Estimate Wisconsin income tax using the 3.54%–7.65% brackets (2025/2026).
How this calculator works
Step 1 starts with the Wisconsin taxable income you already calculated on your return. If you are a part-year resident or nonresident, the tool applies the Wisconsin income percentage you provide to focus on Wisconsin-source income.
Step 2 applies Wisconsin's progressive brackets to the taxable income to estimate total tax.
Step 3 summarizes the effective and marginal rates so you can see how additional income would be taxed and whether your current estimate matches your expectations.
Frequently asked questions
What income should I enter?
Use Wisconsin taxable income from your return. If you only know total income, estimate deductions first or use the standard deduction tool.
Do part-year residents prorate income?
Yes. Use the Wisconsin income allocation percentage from your return to prorate taxable income before applying the brackets.
Does Wisconsin have different brackets by filing status?
Wisconsin uses different brackets for single vs joint filers. The taxable income amount drives the total tax.
Is this tax advice?
No. This tool provides estimates based on the inputs you provide and is not legal or tax advice.
Related tools
This tool provides estimates based on Wisconsin's income tax brackets. Not legal or tax advice.