Wisconsin charges a state income tax on wages, retirement income, and investment gains

Wisconsin has its own income tax separate from federal tax. The state taxes your wages, retirement distributions, interest, dividends, and capital gains. Unlike some states, Wisconsin does not have a flat tax rate — instead, it uses a progressive tax system with rates that increase as your income rises. For the 2024 tax year, Wisconsin rates range from 3.54% on the lowest bracket to 7.65% on the highest.

You file Wisconsin taxes on Form 1, the state income tax return, which you submit to the Wisconsin Department of Revenue. If you work in Wisconsin but live in another state, or vice versa, you may owe tax to both states — though Wisconsin has reciprocal agreements with some neighboring states that can reduce or eliminate this double taxation. The filing important date matches the federal important date: April 15 of the year following the tax year.

Key Takeaways

  • Wisconsin income tax rates range from 3.54% to 7.65% depending on your income bracket, and you file on Form 1 by April 15.
  • The state taxes wages, retirement income, interest, dividends, and capital gains, but not Social Security benefits or certain other income types.
  • If you work in Wisconsin but live elsewhere, you may owe tax to both states, though reciprocal agreements with neighboring states can reduce this.
  • Wisconsin allows deductions for federal taxes paid, mortgage interest, charitable donations, and education expenses, which lower your taxable income.
  • If your employer does not withhold enough tax from your paycheck, you may owe money when you file, or you can adjust your withholding to avoid this.

Wisconsin tax brackets and rates for 2024

Wisconsin uses four tax brackets. Your rate depends on your filing status — single, married filing jointly, married filing separately, or head of household — and your total income. The brackets adjust slightly each year for inflation.

For single filers in 2024, the brackets are: 3.54% on income up to $12,760; 4.65% from $12,761 to $51,520; 6.27% from $51,521 to $231,840; and 7.65% on income above $231,840. Married couples filing jointly have higher thresholds at each bracket, so the same rate applies to more income. The Wisconsin Department of Revenue publishes updated brackets each January on its website.

Your taxable income — the amount you actually pay tax on — is lower than your gross income because you can subtract deductions. Wisconsin allows you to deduct federal income taxes paid, mortgage interest, charitable contributions, and education-related expenses. Many people also take the standard deduction, which is a flat amount based on filing status and age. For 2024, the standard deduction for a single filer under 65 is $8,850.

What income Wisconsin taxes and what it does not

Wisconsin taxes most forms of income: wages from employment, self-employment income, interest earned in savings accounts, dividends from stocks, capital gains when you sell investments at a profit, and distributions from retirement accounts like IRAs and 401(k)s. If you receive rental income from property you own, that is also taxable.

Wisconsin does not tax Social Security benefits, even if you have substantial other income. Military pensions and certain other government pensions receive preferential treatment under state law. Gifts and inheritances are not taxable income. Reimbursements for medical expenses and certain other specific payments are excluded as well.

If you have income from sources outside Wisconsin — for example, you sold stock or received a bonus from an out-of-state employer — Wisconsin still taxes it if you are a resident. Residency is determined by where you maintain your permanent home and where you spend most of your time.

How withholding works and what to do if too much or too little is taken

When you work for an employer in Wisconsin, your employer withholds state income tax from each paycheck based on the W-4 form you complete. This withholding is an estimate meant to cover your annual tax bill. If your employer withholds too much, you receive a refund when you file. If too little is withheld, you owe money.

You can adjust your withholding by submitting a new W-4 to your employer. If you expect to owe money at tax time, increasing your withholding now means less owed later. If you expect a large refund, decreasing your withholding puts more money in your paycheck throughout the year. The Wisconsin Department of Revenue provides a withholding calculator on its website to help you estimate the correct amount.

Self-employed people and those with income not subject to withholding may need to make estimated tax payments four times per year — in April, June, September, and January — to avoid penalties. These payments are due on the 15th of each month, though the January payment can be made with your tax return.

Deductions and credits that lower what you owe

Wisconsin offers several deductions that reduce your taxable income. You can deduct federal income taxes you paid during the year, which is unique to Wisconsin and a few other states. Mortgage interest on your primary residence and second home is deductible. Charitable donations to may have access to organizations are deductible if you itemize rather than take the standard deduction.

Education-related expenses may have access to for deductions as well. If you paid tuition and fees for yourself, a spouse, or a dependent to attend college or vocational school, you can deduct up to $3,850 per person per year. Student loan interest paid during the year is also deductible, up to $2,500.

Wisconsin also offers tax credits, which are different from deductions because they reduce your tax bill directly rather than your income. The Earned Income Tax Credit (EITC) is available to lower-income workers. The Child and Dependent Care Credit helps offset childcare expenses. The Homestead Credit provides relief to homeowners and renters with lower incomes. You must meet specific income limits and other requirements to claim these credits.

Filing your Wisconsin return and where to send it

You file your Wisconsin return using Form 1, which you can obtain from the Wisconsin Department of Revenue website or by calling their tax line. You can file by mail or electronically through the state's e-file system. Electronic filing is faster and reduces errors — the state processes e-filed returns within two to three weeks, while paper returns take longer.

If you file electronically, you submit your return directly to the Wisconsin Department of Revenue through an approved e-file provider or tax software. If you mail a paper return, send it to the address listed on the form. The postmark date is the filing date, so mail it early enough to arrive by April 15 or request an extension.

You can request a filing extension by submitting Form 4868 by April 15. This gives you until October 15 to file your return, though any taxes owed are still due by April 15 to avoid penalties and interest. An extension to file is not an extension to pay.

Reciprocal tax agreements with neighboring states

Wisconsin has reciprocal tax agreements with Illinois, Indiana, Kentucky, and Michigan. These agreements mean that if you live in one of these states but work in Wisconsin, you may not owe Wisconsin income tax on your wages. Instead, you pay tax only to your home state. You must file a Form WT-7 (Claim for Exemption from Wisconsin Withholding) with your Wisconsin employer to stop withholding.

The reciprocal agreement does not explore to all income — it covers wages and salaries but typically not self-employment income, rental income, or investment income. If you live in a non-reciprocal state and work in Wisconsin, you owe tax to both states. Wisconsin allows you to claim a credit on your Wisconsin return for taxes paid to the other state, which prevents double taxation on the same income.

If you work in another state but live in Wisconsin, you may owe tax to that state as well. You can claim a credit on your Wisconsin return for taxes paid to the other state. The specifics depend on the other state's rules, so contact that state's revenue department or consult a tax professional if you have income from multiple states.

Frequently Asked Questions

Do I have to file a Wisconsin return if I only lived there part of the year?

You file as a part-year resident if you moved into or out of Wisconsin during the tax year. You report only the income earned while you were a Wisconsin resident. You may also owe tax to the other state for income earned while you lived there. File Form 1 with a statement explaining your move date and where you lived before or after.

What happens if I do not file my Wisconsin return on time?

The state charges penalties and interest on unpaid taxes. The failure-to-file penalty is 5% of the unpaid tax per month, up to 25%. Interest accrues daily at a rate set by the state, currently around 7% per year. Filing late is better than not filing at all — if you are owed a refund, there is no penalty, only a delay in receiving it.

Can I file my Wisconsin return if I did not file a federal return?

You can file a Wisconsin return even if you are not required to file federally, though most people who owe Wisconsin tax also owe federal tax. If you had Wisconsin income tax withheld and did not file, you may be owed a refund. Contact the Wisconsin Department of Revenue or file Form 1 to claim it.

How do I know if I am considered a Wisconsin resident for tax purposes?

You are a Wisconsin resident if you maintain a permanent home in the state and spend more than half the year there. If you have a home in Wisconsin but spend most of the year elsewhere, you may still be considered a resident if Wisconsin is your principal place of abode. The Department of Revenue can clarify your residency status if you are unsure.

What if I moved out of Wisconsin — do I still owe state tax?

You owe Wisconsin tax only on income earned while you were a resident. Once you establish residency in another state, you file as a part-year resident for the year you moved and report only income earned before your move date. Keep documentation of your move — a lease, utility bill, or driver's license — to support your residency change.