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

Indiana charges a flat 3.23% state income tax on wages, salaries, and other earned income. This rate applies to all Indiana residents and to nonresidents who earn money within the state. The tax is withheld from paychecks by employers, similar to federal income tax, so you see the deduction on each pay stub rather than paying a lump sum at tax time.

The 3.23% rate has been in place since 2022 and is one of the lowest state income tax rates in the country. Indiana also taxes certain types of investment income and retirement distributions, though the rules differ depending on the source. Unlike some states, Indiana does not have a separate tax bracket system—everyone pays the same percentage regardless of income level.

Key Takeaways

  • Indiana's state income tax rate is a flat 3.23% on wages and most earned income, with no variation by income level.
  • Your employer withholds Indiana income tax from your paycheck automatically, just as they do for federal tax.
  • Nonresidents who work in Indiana must pay Indiana income tax on that income, even if they live in another state.
  • Certain retirement income, including Social Security and some pension distributions, may be partially or fully exempt from Indiana state tax.
  • Indiana has no sales tax on groceries, but does tax most other purchases at rates that vary by county.

How Indiana income tax is withheld from your paycheck

When you start a job in Indiana, your employer uses a W-4 form to calculate how much state income tax to withhold. The amount depends on your filing status, the number of dependents you claim, and your gross pay. Most employees see the withholding appear as a separate line item on their pay stub, labeled as "IN tax" or "Indiana state tax."

The withholding is sent directly to the Indiana Department of Revenue by your employer, usually along with federal withholding. If too much is withheld during the year, you receive a refund when you file your state tax return. If too little is withheld, you owe the difference. You can adjust your withholding at any time by submitting a new W-4 to your employer's payroll department.

What types of income are taxed in Indiana

Indiana income tax applies to wages, salaries, tips, and most forms of self-employment income. If you receive a 1099 form for freelance or contract work, that income is subject to Indiana tax. Interest and dividend income are also taxable, though Indiana offers a small deduction for certain types of investment income.

Retirement income has special rules. Social Security benefits are not taxed by Indiana. Distributions from traditional IRAs and 401(k) plans are taxed as ordinary income. However, Indiana offers a deduction for certain pension and annuity income if you meet age and income requirements—generally, if you are 59½ or older, you may exclude some or all of your pension income from taxation. Military retirement pay receives special treatment and may be partially exempt. The exact amount of the deduction depends on your total income and filing status.

Who must file an Indiana state tax return

You must file an Indiana state tax return if your income exceeds the threshold for your filing status. For the 2023 tax year, the threshold is $1,150 for single filers and $2,300 for married couples filing jointly. These thresholds are adjusted annually for inflation. Even if you do not owe tax, filing may be worth your time if you had Indiana income tax withheld—you could receive a refund.

Nonresidents who earned income in Indiana during the year must also file, even if they live in another state. You report only the income earned in Indiana on your Indiana return, not your total income from all sources. If you worked in Indiana for part of the year and another state for part of the year, you file returns in both states and report only the income earned in each state on the corresponding return.

Indiana sales tax and other taxes you may pay

Indiana does not have a state sales tax on groceries, which saves residents money on food purchases. However, most other items are subject to sales tax. The state sales tax rate is 7%, but counties can add a local option tax, so the total rate varies by location. Some counties charge 7% total, while others charge up to 8.5% or higher. The rate depends on where you make the purchase.

Indiana also taxes gasoline, cigarettes, and alcohol at rates set by the state. Property tax is assessed by county and varies widely depending on location and property value. If you own a vehicle, you pay an annual registration fee and may owe property tax on the vehicle depending on your county. These taxes are separate from income tax and are not affected by the 3.23% rate.

How to file your Indiana state tax return

You can file your Indiana return using tax software, by mail, or through a tax professional. The Indiana Department of Revenue accepts returns filed electronically through approved software providers, which is usually the fastest way to receive a refund. You can also read the forms from the department's website and mail them in, though processing takes longer.

The important date to file is the same as the federal important date, typically April 15. If you need more time, you can request an extension, which gives you until October 15 to file. An extension to file does not extend the important date to pay any tax you owe—if you expect to owe money, you should pay by April 15 even if you file late. You can pay online through the Indiana Department of Revenue website, by mail, or through your tax software.

Deductions and credits available to Indiana taxpayers

Indiana offers a standard deduction that reduces your taxable income before the 3.23% rate is applied. The standard deduction amount varies by filing status and age. You can also claim the federal standard deduction if it is larger, though Indiana requires you to use the same deduction method (standard or itemized) as you use on your federal return.

Indiana provides tax credits for certain situations, such as having dependent children or paying for childcare. The state also offers credits for property tax paid and for renters who pay rent. These credits reduce the amount of tax you owe dollar-for-dollar, making them more valuable than deductions. You must claim these credits on your return—they are not automatic. Review the Indiana Department of Revenue website or speak with a tax professional to determine which credits explore to your situation.

Frequently Asked Questions

Do I have to pay Indiana income tax if I live in another state but work in Indiana?

Yes. Indiana taxes income earned within the state, regardless of where you live. You file an Indiana return reporting only the income you earned in Indiana and pay the 3.23% tax on that amount. You also file a return in your home state, which typically gives you a credit for taxes paid to Indiana to avoid double taxation.

Is Social Security taxed by Indiana?

No. Indiana does not tax Social Security benefits. However, if you have other income in addition to Social Security, that other income is subject to the 3.23% tax. Social Security is excluded entirely from Indiana taxation.

What happens if my employer does not withhold Indiana income tax?

You are still responsible for paying the tax. When you file your return, you will owe the full amount of tax due on your income. To avoid a large bill at tax time, contact your employer's payroll department and may support your W-4 is on file. If your employer refuses to withhold, you can contact the Indiana Department of Revenue for guidance.

Can I deduct federal income tax from my Indiana state tax?

No. Indiana does not allow you to deduct federal income tax paid. You calculate Indiana tax based on your gross income (or adjusted gross income after certain deductions), not on your income after federal tax is removed.

What is the penalty for filing late or paying late?

Indiana charges interest on unpaid tax at a rate set quarterly by the Department of Revenue. If you file more than 60 days late without a valid reason, you may owe a failure-to-file penalty. If you owe tax and do not pay by the important date, you owe a failure-to-pay penalty. Filing for an extension before the important date eliminates the failure-to-file penalty but not the failure-to-pay penalty if you owe money.