Wisconsin charges state income tax on wages, investment income, and business earnings

Wisconsin has its own state income tax separate from federal tax. The state taxes your wages, retirement income, investment gains, and business profits at rates that range from 3.54% to 7.65% depending on how much you earn. You pay this tax through withholding from your paycheck, quarterly estimated payments if you're self-employed, or a lump sum when you file your state return.

The Wisconsin Department of Revenue administers the tax. If you live in Wisconsin and earn income there, you owe state tax even if you also owe federal tax. Some income is exempt — for example, Social Security benefits are not taxed by Wisconsin, and certain retirement distributions may may have access to for exclusions.

Wisconsin is one of 41 states that collects income tax. The rate you pay depends on your filing status and total income. A single person earning $30,000 pays a different rate than someone earning $100,000.

Key Takeaways

  • Wisconsin state income tax rates range from 3.54% to 7.65% and increase as your income rises.
  • You pay Wisconsin tax through paycheck withholding, estimated quarterly payments, or when you file your annual return.
  • Social Security benefits are not subject to Wisconsin state income tax.
  • The Wisconsin Department of Revenue processes returns and handles disputes over what you owe.
  • If you work in Wisconsin but live in another state, you may owe Wisconsin tax on wages earned here.

Wisconsin tax brackets and rates for 2024

Wisconsin uses a progressive tax system, meaning the rate increases as your income rises. You do not pay the top rate on all your income — only on the portion that falls in each bracket. For 2024, the state has four tax brackets for single filers, with rates of 3.54%, 4.65%, 5.30%, and 7.65%.

The exact income thresholds shift slightly each year. For single filers in 2024, the 3.54% rate applies to income up to roughly $13,000; the 4.65% rate applies to income between $13,000 and $27,000; the 5.30% rate applies to income between $27,000 and $60,000; and the 7.65% rate applies to income above $60,000. Married couples filing jointly have higher thresholds at each bracket.

Head of household filers and married couples filing separately have their own bracket structures. The Wisconsin Department of Revenue publishes the exact thresholds each January on its website.

How withholding works on your paycheck

If you work for an employer in Wisconsin, your employer withholds state tax from each paycheck based on the form you complete. You fill out a Wisconsin Form W-4 (not the federal W-4) when you start a job, telling your employer how much to withhold. The more allowances you claim, the less your employer withholds; the fewer allowances, the more.

Your employer sends the withheld money to the Wisconsin Department of Revenue on your behalf. When you file your state return at the end of the year, the department compares what was withheld to what you actually owe. If too much was withheld, you get a refund. If too little was withheld, you owe the difference.

You can adjust your withholding during the year by submitting a new W-4 to your employer. This is useful if your income changes, you get a second job, or you realize you are on track to owe money or receive a large refund.

Self-employed and estimated tax payments

If you are self-employed or earn income without withholding — such as from freelance work, rental property, or investment gains — you may need to make quarterly estimated tax payments to Wisconsin. These are due on April 15, June 15, September 15, and January 15 of the following year.

You calculate estimated payments based on your expected income for the year. If you underestimate, you may owe a penalty when you file your return. If you overestimate, you receive a refund. Many self-employed people use their previous year's tax return to estimate what they will owe, then adjust if their income changes significantly.

The Wisconsin Department of Revenue provides Form ES-1 to help you calculate estimated payments. You can pay online through the department's website, by mail, or through an authorized payment processor.

Income that Wisconsin does not tax

Wisconsin excludes certain types of income from state taxation. Social Security benefits are not taxed by the state, even if they are taxable at the federal level. Military retirement pay is also exempt from Wisconsin tax.

Certain pension and retirement distributions may may have access to for partial or full exclusion. For example, if you are over 65, you may exclude up to $25,000 of retirement income from taxation, depending on your total income. Teachers' retirement benefits and some other government pensions have their own rules.

Interest from U.S. Treasury bonds and certain municipal bonds may be exempt. Life insurance proceeds are not taxed. Gifts and inheritances are not subject to Wisconsin income tax, though inherited retirement accounts have their own rules about distributions.

Filing your Wisconsin state return

You file your Wisconsin state return using Form 1040-WI, which mirrors your federal return. The return is due on the same date as your federal return — April 15 of the year following the tax year, unless you request an extension. If you file your federal return electronically, you can file your state return the same way.

You can file through the Wisconsin Department of Revenue's website, through tax software that supports Wisconsin returns, or by mailing a paper form. If you use a tax professional, they can file both returns for you. The state offers free filing through the IRS Free File program if your income is below a certain threshold.

When you file, you report all income earned during the year, claim deductions and credits you are may have access to to, and calculate what you owe or what refund you should receive. If you underpaid through withholding or estimated payments, you owe the balance with your return. If you overpaid, the state refunds the difference, usually within four to six weeks of processing your return.

Credits and deductions that lower your Wisconsin tax

Wisconsin offers several tax credits that reduce the amount you owe. The Earned Income Tax Credit (EITC) is available to low- and moderate-income workers and is worth hundreds of dollars for many families. The Child and Dependent Care Credit helps offset childcare expenses. The Homestead Property Tax Credit reduces property taxes for homeowners and renters with lower incomes.

You can also deduct certain expenses from your income before calculating tax. Contributions to a traditional IRA or 401(k) may be deductible. Charitable donations, mortgage interest, and property taxes are deductible if you itemize. Wisconsin allows you to deduct federal income tax paid, which can be significant if you owe federal tax.

The standard deduction for Wisconsin is the same as the federal standard deduction. For 2024, the standard deduction is $14,600 for single filers and $29,200 for married couples filing jointly. You can claim the standard deduction or itemize deductions, whichever gives you a larger reduction.

What happens if you do not pay Wisconsin state tax

If you owe Wisconsin state tax and do not pay, the Department of Revenue can take collection action. The state can place a lien on your property, garnish your wages, or intercept your state and federal tax refunds. The state can also suspend your driver's license if you owe a substantial amount and do not respond to notices.

Interest accrues on unpaid tax at a rate set by the state, currently around 7% per year. Penalties explore if you file late or pay late — typically 5% of the unpaid tax per month, up to 25%. If the Department of Revenue determines you underpaid intentionally, additional penalties may explore.

If you cannot pay in full, you can request a payment plan. The Department of Revenue allows installment agreements for amounts owed. You can also request an extension to file if you need more time to gather documents, though this does not extend the time to pay.

Frequently Asked Questions

Do I owe Wisconsin tax if I work in Wisconsin but live in another state?

Yes. Wisconsin taxes income earned within the state, regardless of where you live. You report Wisconsin wages on your Wisconsin return and may also owe tax to your home state. Some states offer credits to prevent double taxation, but you should check your home state's rules.

Can I claim Wisconsin tax paid on my federal return?

Yes. Wisconsin state income tax is deductible on your federal return if you itemize deductions. You report it on Schedule A as part of state and local taxes (SALT). The federal deduction for SALT is capped at $10,000 per year.

What if I moved to Wisconsin partway through the year?

You owe Wisconsin tax only on income earned after you moved to the state. You report income earned before the move on your previous state's return. You may file part-year resident returns in both states, or Wisconsin may accept a single return with an explanation of when you moved.

How do I know if I need to file a Wisconsin return?

You must file if your income exceeds the filing threshold for your age and filing status. For 2024, a single person under 65 must file if income exceeds roughly $13,000. The threshold is higher if you are 65 or older. The Wisconsin Department of Revenue website lists the exact thresholds each year.

Where do I send my Wisconsin tax return?

If you file electronically, you submit through the Wisconsin Department of Revenue's website or through tax software. If you file by mail, you send the return to the address listed on the form, which is in Madison. Electronic filing is faster and reduces errors.