Wisconsin's Income Tax System

Wisconsin has a progressive income tax system, meaning the tax rate increases as your income increases. The state uses four tax brackets, and you pay a different percentage depending on which bracket your income falls into. For the 2024 tax year, Wisconsin's top rate is 5.85%, which is lower than the national average.

The state taxes both wages and other income sources—including interest, dividends, capital gains, and business income. Unlike some states, Wisconsin does not have a separate capital gains tax; those gains are taxed as ordinary income at your regular rate.

Key Takeaways

  • Wisconsin uses four tax brackets ranging from 3.54% to 5.85%, depending on your filing status and total income.
  • Tax brackets adjust each year for inflation, so the income thresholds that determine your rate change annually.
  • Wisconsin taxes wages, self-employment income, interest, dividends, and capital gains all as ordinary income.
  • You file Wisconsin taxes on Form 1 (the state income tax return) after you complete your federal return.

The Four Tax Brackets for 2024

Wisconsin's four brackets for single filers in 2024 are 3.54%, 4.65%, 5.30%, and 5.85%. Married couples filing jointly have higher income thresholds before moving into each bracket, which means you pay the lower rate on more income. Head of household filers have thresholds between single and married rates.

The exact dollar amounts that trigger each bracket change every year. For 2024, a single filer enters the highest bracket (5.85%) once income exceeds roughly $31,000, though the Wisconsin Department of Revenue publishes the precise thresholds each January. If your income is below $12,000 as a single filer, you pay the lowest rate of 3.54%.

Married couples filing jointly do not enter the top bracket until income exceeds roughly $41,000. This bracket structure means most Wisconsin residents pay somewhere between 3.54% and 5.30%, with only higher earners hitting the 5.85% rate.

What Income Gets Taxed

Wisconsin taxes all income sources at your regular tax rate. This includes W-2 wages from an employer, self-employment income if you run a business, interest from savings accounts, dividend payments from stocks, and capital gains from selling investments at a profit. There is no separate treatment for long-term capital gains—they are taxed the same way as your regular income.

Some income is excluded from Wisconsin taxation. Social Security benefits are not taxed by the state (though they may be taxed federally). Certain retirement distributions, including may have access to distributions from 401(k)s and IRAs for people over 59½, receive special treatment under Wisconsin law and may be partially or fully excluded from state tax, depending on your age and income level.

How to File Wisconsin State Taxes

You file Wisconsin state income taxes using Form 1, the Wisconsin Individual Income Tax Return. You complete this form after you finish your federal return, because many of your federal numbers carry over to the state form. If you use tax software, it usually handles both returns at once.

The filing important date is the same as the federal important date—typically April 15. If you owe money, you pay it with your return. If you overpaid through withholding during the year, you receive a refund. Wisconsin allows you to file electronically or by mail; e-filing is faster and reduces errors.

If you are self-employed or have business income, you also file Schedule SE (federal) to calculate self-employment tax, and Wisconsin requires you to report that same income on your state return. You may also need to make quarterly estimated tax payments if you do not have an employer withholding taxes for you.

Tax Credits and Deductions Available in Wisconsin

Wisconsin offers several tax credits that reduce the amount of tax you owe. The Earned Income Tax Credit (EITC) is available to lower-income workers and is calculated based on your federal EITC—Wisconsin's credit is a percentage of your federal credit. The state also offers a Child and Dependent Care Credit for people who pay for childcare while they work.

You can deduct either the standard deduction or itemized deductions on your Wisconsin return, just as you do on your federal return. The Wisconsin standard deduction varies by filing status and age. If you are 65 or older, you receive an additional standard deduction amount. Wisconsin also allows a deduction for property taxes and rent paid, which can lower your taxable income.

Withholding and Estimated Payments

If you work as an employee, your employer withholds Wisconsin income tax from your paycheck based on the W-4 form you complete. The amount withheld depends on your filing status, the number of dependents you claim, and any extra withholding you request. If you think too much or too little is being withheld, you can update your W-4 with your employer at any time.

If you are self-employed or have income that is not subject to withholding, you may need to make quarterly estimated tax payments to Wisconsin. These payments are due on April 15, June 15, September 15, and January 15. Paying quarterly helps you avoid a large bill at tax time and may help you avoid penalties for underpayment.

Frequently Asked Questions

Does Wisconsin tax retirement income differently?

Social Security is not taxed by Wisconsin. Distributions from traditional IRAs and 401(k)s are taxed as ordinary income, but if you are over 59½, you may exclude up to $25,000 per year of retirement income (or $50,000 if married filing jointly) from certain retirement accounts. Pensions and annuities have their own rules, so check with the Wisconsin Department of Revenue if you receive one.

What if I work in Wisconsin but live in another state?

You must file a Wisconsin return and pay Wisconsin tax on income you earned in the state, even if you live elsewhere. However, you may be able to claim a credit on your home state's return for taxes paid to Wisconsin, so you do not pay tax twice on the same income. The rules vary by state, so review both states' guidance.

How often do Wisconsin tax brackets change?

Wisconsin adjusts tax brackets every year for inflation. The Wisconsin Department of Revenue announces the new brackets and standard deduction amounts in January for that tax year. You can find the current year's brackets on the department's website or in the instructions that come with Form 1.

Can I file Wisconsin taxes if I did not earn enough to file federal taxes?

Wisconsin has its own income thresholds for filing, which may differ from federal thresholds. Even if you do not have to file a federal return, you may still owe Wisconsin tax or be due a refund. Check the Wisconsin Department of Revenue's filing requirements to see if you must file.

What is the penalty for paying Wisconsin taxes late?

Wisconsin charges interest on unpaid taxes starting the day after the due date. The interest rate changes quarterly and is based on the federal rate plus a state addition. If you do not file on time without a valid reason, you may also face a failure-to-file penalty. Contact the Wisconsin Department of Revenue if you cannot pay by the important date to discuss payment plans.