Indiana collects state income tax on wages, and the rate is flat across all income levels

Yes, Indiana has a state income tax. The current rate is 3.15 percent on most income, and it applies the same way regardless of how much you earn — there are no tax brackets that increase with higher income. This means a person earning $30,000 and a person earning $300,000 both pay 3.15 percent on their taxable income.

Indiana's income tax covers wages from employment, self-employment income, interest, dividends, and other sources. Your employer typically withholds this tax from your paycheck automatically, similar to federal income tax withholding. If you are self-employed or have income that is not subject to withholding, you may need to make estimated tax payments throughout the year.

Key Takeaways

  • Indiana's state income tax rate is a flat 3.15 percent on most types of income, with no variation based on how much you earn.
  • Employers withhold Indiana income tax from paychecks, but self-employed workers and those with certain other income sources must handle withholding themselves.
  • You file Indiana income tax on Form IT-40 if you lived in the state for the full year, or Form IT-40PNR if you moved in or out during the tax year.
  • Indiana offers a standard deduction that reduces your taxable income before the 3.15 percent rate is applied.
  • Some types of income, such as Social Security benefits and certain retirement distributions, are not subject to Indiana income tax.

How Indiana income tax withholding works on your paycheck

When you start a job in Indiana, your employer asks you to complete a withholding form so they know how much state income tax to remove from each paycheck. This form tells your employer whether you want them to withhold at the standard rate or make adjustments based on your personal situation — for example, if you have a spouse who also works or if you have dependents.

The amount withheld is sent to the Indiana Department of Revenue on your employer's behalf. At the end of the year, you file a state tax return to reconcile what was withheld against what you actually owe. If too much was withheld, you receive a refund; if too little was withheld, you owe the difference when you file.

If you work for multiple employers or have income sources without withholding, you may need to adjust your withholding or make estimated payments. The Indiana Department of Revenue provides a withholding calculator on its website to help you figure out the right amount.

Filing your Indiana income tax return

Most Indiana residents file their state income tax return using Form IT-40, which you submit to the Indiana Department of Revenue. You must file if your income exceeds the threshold set by the state for the tax year — this threshold changes annually and depends on your filing status and age. Even if you do not owe tax, filing may be necessary to claim a refund of withheld amounts.

If you moved to or from Indiana during the tax year, you file Form IT-40PNR instead, which accounts for the months you were and were not a resident. You will need to report income for the entire year but may only owe Indiana tax on the income earned while you were living in the state.

Indiana allows you to file electronically through the state's website or through tax software. The filing important date is the same as the federal important date — typically April 15 of the following year, though the state may grant extensions if you request one.

Income that is not subject to Indiana tax

Not all income is taxed by Indiana. Social Security benefits are exempt from state income tax, even if they are taxable at the federal level. Certain retirement income is also excluded, including distributions from may have access to pension plans and some distributions from individual retirement accounts (IRAs), though the rules vary depending on your age and the type of account.

Military pay for active-duty service members is exempt from Indiana income tax. Certain types of interest income, such as interest from U.S. Treasury bonds, may also be excluded. If you receive income from sources outside Indiana while you are a resident, that income is generally still subject to Indiana tax — the state taxes residents on all income regardless of where it is earned.

Deductions and credits that reduce what you owe

Indiana offers a standard deduction that you subtract from your income before explore the 3.15 percent tax rate. The amount of the standard deduction depends on your filing status and age; older taxpayers may receive a higher deduction. You can choose to itemize deductions instead if your specific expenses are higher, though most Indiana residents benefit from the standard deduction.

The state also offers tax credits for certain situations — for example, if you paid income tax to another state on income you earned there while living in Indiana, you may be able to claim a credit to avoid double taxation. Parents may also be able to claim credits for dependent children, though the amount and rules change periodically. Check the Indiana Department of Revenue website or your tax software for the current year's credits.

What happens if you do not file or pay

If you owe Indiana income tax and do not file or pay by the important date, the state charges penalties and interest on the unpaid amount. The penalty typically starts at a percentage of the unpaid tax and increases the longer the debt remains outstanding. Interest accrues daily on any unpaid tax.

If you cannot pay the full amount by the important date, you can contact the Indiana Department of Revenue to discuss payment plans or request an extension. Filing your return on time, even if you cannot pay when ready, reduces the penalties you will face. The state is generally more lenient with taxpayers who file late but show good faith effort to pay than with those who do not file at all.

Frequently Asked Questions

Do I have to file an Indiana income tax return if I only lived there part of the year?

If you moved to or from Indiana during the tax year, you file Form IT-40PNR and report all your income for the full year, but you only owe Indiana tax on income earned while you were a resident. You will need to determine the date you became or ceased to be an Indiana resident — typically the date you moved or established residency.

Is Indiana income tax withheld if I am self-employed?

No, your clients or customers do not withhold Indiana income tax for you. You are responsible for paying estimated taxes quarterly if you expect to owe more than a certain amount. You can make these payments through the Indiana Department of Revenue's online system or by mail.

Can I claim Indiana income tax paid to another state?

Yes, Indiana offers a credit for income tax paid to another state on income you earned there. You report this credit on your Indiana return to avoid paying tax twice on the same income. The credit is limited to the lesser of what you paid to the other state or what you owe to Indiana.

What is the difference between the standard deduction and itemized deductions?

The standard deduction is a fixed amount you subtract from your income based on your filing status and age. Itemized deductions are specific expenses you list individually. Most Indiana taxpayers benefit from the standard deduction, but if your deductible expenses are unusually high, itemizing may save you more in taxes.

Do I owe Indiana income tax on money I inherited?

Inheritances are not subject to Indiana income tax. However, if the inherited money generates income — such as interest or dividends — that income is taxable. Indiana does not have an inheritance tax or estate tax, so the inheritance itself passes to you tax-free at the state level.