Wisconsin has a state income tax, and it applies to most residents and workers

Yes, Wisconsin charges a state income tax. If you live in Wisconsin or earn income there, you will owe state income tax on wages, self-employment income, investment gains, and other sources. The tax rate depends on your income level — Wisconsin uses a progressive system with rates that climb as your income rises.

Wisconsin's state income tax is separate from federal income tax. You file both returns, and the state does not reduce your federal bill. The Wisconsin Department of Revenue collects the state tax and uses it to fund state programs and services.

Key Takeaways

  • Wisconsin imposes state income tax on residents and anyone earning income within the state, with rates ranging from 3.54% to 7.65% depending on filing status and income level.
  • You must file a Wisconsin state income tax return if you earn above a certain threshold, which varies by age and filing status.
  • Wisconsin allows you to claim a portion of your federal income tax paid as a credit on your state return, reducing what you owe the state.
  • Self-employed workers in Wisconsin owe both income tax and self-employment tax, and must make quarterly estimated tax payments if they expect to owe more than a certain amount.

Wisconsin income tax rates and brackets

Wisconsin uses five tax brackets. The lowest rate is 3.54% on the first portion of your income, and the highest is 7.65% on income above a certain threshold. The exact dollar amounts where the rates change depend on whether you file as single, married filing jointly, married filing separately, or head of household. These brackets adjust each year for inflation.

For the 2024 tax year, a single filer pays 3.54% on income up to roughly $15,000, then the rate steps up at higher income levels. A married couple filing jointly starts at 3.54% on income up to roughly $20,000. The Wisconsin Department of Revenue publishes the exact brackets each January on its website.

Because Wisconsin uses a progressive system, you do not pay the top rate on all your income — only on the portion that falls in the highest bracket you reach. A person earning $50,000 does not pay 7.65% on the whole amount; they pay the lower rates on the first portions and the higher rate only on income above the threshold for their bracket.

Who must file a Wisconsin state return

You must file a Wisconsin return if your gross income exceeds a threshold set by the state. The threshold depends on your age and filing status. For the 2024 tax year, a single person under 65 must file if gross income is $13,200 or more. A married couple filing jointly must file if combined gross income is $17,500 or more. These thresholds are lower for people age 65 and older.

Even if you do not meet the filing threshold, you may want to file anyway. If your employer withheld Wisconsin income tax from your paychecks, filing allows you to claim a refund of any overpayment. If you are self-employed or have investment income, filing may also be required for tax purposes even if your total income is below the threshold.

Wisconsin income tax credits and deductions

Wisconsin allows you to claim a credit for federal income tax you paid during the year. This credit reduces your Wisconsin tax bill dollar-for-dollar. You calculate it based on your federal tax liability and your Wisconsin taxable income. The credit appears on your Wisconsin return and can significantly lower what you owe the state.

Wisconsin also offers a Homestead Tax Credit for homeowners and renters with lower incomes. This credit reduces property tax or rent burden based on household income and property taxes paid. You claim it on your Wisconsin return, and the state may send you a refund if the credit exceeds your tax liability.

You can deduct certain expenses if you are self-employed, including business supplies, equipment, and a portion of your home office if you use it exclusively for work. Wisconsin follows federal rules for most deductions, so if you can deduct something on your federal return, you can usually deduct it on your Wisconsin return as well.

Self-employment tax in Wisconsin

If you are self-employed, you owe Wisconsin state income tax on your net self-employment income, just as you would on wages. You also owe federal self-employment tax, which funds Social Security and Medicare. Wisconsin does not have a separate self-employment tax — the state income tax applies to your net profit after business expenses.

Self-employed workers must make quarterly estimated tax payments to Wisconsin if they expect to owe more than a certain amount. The Wisconsin Department of Revenue provides a worksheet to calculate estimated payments. You can pay online through the state's payment portal, by mail, or through an electronic funds withdrawal.

Keep records of all business income and expenses throughout the year. Self-employed filers typically use Schedule C (federal) and the Wisconsin equivalent to report income and deductions. If you hire employees, you also become responsible for withholding their state income tax and remitting it to the state.

How to file your Wisconsin state return

You can file your Wisconsin return by mail or electronically. The Wisconsin Department of Revenue accepts e-filed returns through approved tax software or through a tax professional. E-filing is faster and reduces the chance of errors — the state processes e-filed returns more quickly than paper returns.

If you file by mail, send your completed return and any supporting documents to the address listed on the form. The important date to file is the same as the federal important date, typically April 15. If you cannot file by the important date, you can request an extension, which gives you until October 15 to file.

Many tax software programs allow you to file both your federal and Wisconsin returns in one session. The software walks you through your income, deductions, and credits, calculates your tax, and files electronically. Some programs charge a fee for state returns, while others include them at no extra cost.

Withholding and refunds

If you are an employee, your employer withholds Wisconsin state income tax from your paycheck based on the W-4 form you complete. The amount withheld depends on your income, filing status, and the number of dependents you claim. If too much is withheld, you receive a refund when you file your return. If too little is withheld, you owe the state when you file.

You can adjust your withholding at any time by giving your employer a new W-4. If you expect a large refund, you might increase your withholding to bring home more pay each week. If you expect to owe, you might decrease your withholding or make estimated payments to avoid a large bill at tax time.

Refunds are issued by check or direct deposit, depending on how you filed. If you filed electronically and provided your bank account information, the state deposits refunds directly into your account. Direct deposit refunds typically arrive faster than checks sent by mail.

Frequently Asked Questions

Can I deduct my federal income tax from my Wisconsin return?

Yes. Wisconsin allows you to claim a credit for federal income tax paid, which reduces your state tax liability. This is not a deduction — it is a credit that directly lowers the amount you owe Wisconsin. The credit is calculated on your Wisconsin return based on your federal tax liability.

Do I have to pay Wisconsin income tax if I work remotely for an out-of-state company?

Yes, if you live in Wisconsin and work remotely, you owe Wisconsin state income tax on your wages. Your employer may not withhold Wisconsin tax if the company is based elsewhere, so you may need to make estimated payments or arrange for additional withholding to avoid owing at tax time.

What happens if I do not file a Wisconsin return when I am supposed to?

The Wisconsin Department of Revenue may assess penalties and interest on any unpaid tax. If you owe a refund, you cannot receive it until you file. If you believe you will owe, filing late still results in penalties, so it is better to file and pay what you owe than to avoid filing altogether.

Is Social Security income taxable in Wisconsin?

Wisconsin does not tax Social Security benefits. However, other retirement income such as pensions, 401(k) withdrawals, and IRA distributions may be taxable. If you receive only Social Security and no other income, you likely do not owe Wisconsin state income tax.

Can I file my Wisconsin return if I do not have a Social Security number?

You need either a Social Security number or an Individual Taxpayer Identification Number (ITIN) to file. If you do not have a Social Security number, you can explore for an ITIN through the IRS. The ITIN allows you to file both federal and state returns.