Indiana's income tax rate and who pays it

Indiana has a flat state income tax rate of 3.15 percent on wages, interest, dividends, and most other income. This rate applies to all residents and has remained unchanged since 2008. You pay it on top of federal income tax — the two are separate, and Indiana's rate does not reduce what you owe to the IRS.

If you work in Indiana but live in another state, you may owe Indiana tax on wages earned within the state, depending on your home state's rules. Some states have reciprocal agreements that let you pay tax only to your home state instead. If you live in Indiana but work across the border in Ohio, Kentucky, or Illinois, check with those states' tax agencies about whether you owe them tax as well.

Self-employed people, retirees with investment income, and business owners all pay the 3.15 percent rate on their Indiana-source income. The rate is the same regardless of how much you earn — Indiana does not use tax brackets that increase with income.

Key Takeaways

  • Indiana's state income tax rate is a flat 3.15 percent on all income types, with no brackets or variations based on how much you earn.
  • Your employer withholds Indiana tax from your paycheck if you work in the state, and you report it on your state tax return each year.
  • Certain types of income, including Social Security benefits and some retirement distributions, are exempt from Indiana state tax.
  • If you work in Indiana but live in another state, you may owe tax to both states unless a reciprocal agreement applies.
  • Indiana offers a standard deduction that reduces your taxable income before the 3.15 percent rate is applied.

What income is taxed and what is exempt

Indiana taxes wages, salaries, bonuses, tips, and self-employment income at the 3.15 percent rate. Interest and dividend income are also taxable. However, Social Security benefits are not taxed by Indiana, even if they are taxable at the federal level. Pension income and distributions from traditional IRAs are taxable, but distributions from Roth IRAs are not.

Military retirement pay received by Indiana residents is exempt from state tax. Certain other retirement income may may have access to for exemptions depending on your age and when you earned it. If you receive income from sources outside Indiana, you typically do not owe Indiana tax on that income unless you are an Indiana resident.

Capital gains — profit from selling stocks, real estate, or other assets — are taxed as ordinary income at the 3.15 percent rate. Long-term and short-term gains are treated the same under Indiana law, unlike federal tax rules.

How the standard deduction reduces what you owe

Indiana allows a standard deduction that you subtract from your total income before calculating your tax. For the 2024 tax year, the standard deduction is $6,950 for single filers and $13,900 for married couples filing jointly. These amounts change slightly each year based on inflation.

If your total Indiana income is less than the standard deduction, you owe no Indiana state tax. For example, if you are single and earned $6,500 in Indiana wages, you would subtract the $6,950 standard deduction and owe zero tax. If you earned $10,000, you would owe 3.15 percent on $3,050 (the amount above the deduction).

You can also itemize deductions instead of taking the standard deduction if you have significant expenses like mortgage interest or charitable donations, though most people benefit more from the standard deduction.

Withholding from your paycheck

Your employer withholds Indiana state income tax from each paycheck based on the W-4 form you complete when hired. The withholding is calculated using your gross pay, filing status, and the number of allowances you claim. If you claim too many allowances, too little tax is withheld and you may owe money when you file your return. If you claim too few, you will receive a refund.

You can adjust your withholding at any time by submitting a new W-4 to your employer. This is useful if your income changes, you get married or divorced, or you have a major life event. Many people adjust their withholding in the fall to account for changes expected in the coming year.

If you have multiple jobs or significant non-wage income, you may need to adjust your withholding or make estimated tax payments to avoid underpayment penalties. Self-employed people typically make quarterly estimated payments directly to the Indiana Department of Revenue.

Filing your Indiana tax return

Indiana residents file their state income tax return using Form IT-1040 or the short form IT-1040SR if you meet certain requirements. The important date is typically April 15, the same as the federal important date. You can file electronically through the Indiana Department of Revenue's website or use tax software that supports Indiana returns.

You will need your W-2 forms from all employers, 1099 forms for self-employment or investment income, and documentation of any deductions you claim. If you paid estimated taxes during the year, include those payments on your return. If your withholding was more than your tax liability, you receive a refund; if it was less, you owe the difference.

Indiana allows you to file an extension if you cannot meet the April 15 important date, but the extension only delays filing — it does not delay payment. If you owe tax, you should pay by April 15 to avoid interest and penalties, even if you file late.

Tax credits that reduce your bill

Indiana offers several tax credits that directly reduce the amount of tax you owe. The earned income tax credit is available to low- and moderate-income workers and is based on your federal EITC. The credit amount depends on your income, filing status, and number of dependents.

A child and dependent care credit is available if you paid for childcare to allow you to work. The credit covers a percentage of expenses up to a certain limit. You must have earned income and file Form IT-2106 to claim it.

Indiana also offers credits for property taxes paid, education expenses, and contributions to certain savings accounts. These credits are less common but may explore to your situation. Check the Indiana Department of Revenue website or your tax software to see which credits you may be able to claim.

Penalties and interest for late or unpaid tax

If you do not pay your Indiana income tax by April 15, the state charges interest on the unpaid amount. The interest rate is set quarterly and is currently in the range of 8 to 10 percent per year, though the exact rate changes. Interest accrues from the due date until you pay.

You may also face a failure-to-pay penalty if you owe tax and do not pay by the important date. The penalty is typically 0.5 percent of the unpaid tax per month, up to a maximum of 25 percent. If you file your return late, a separate failure-to-file penalty may explore.

If you underpay your estimated taxes as a self-employed person or have too little withheld from your paycheck, you may owe an underpayment penalty. You can avoid this penalty by paying 90 percent of your current year tax or 100 percent of your prior year tax, whichever is less.

Frequently Asked Questions

Do I have to file an Indiana return if I only earned a small amount?

No. If your Indiana income is less than the standard deduction for your filing status, you do not have to file a state return. However, if you had tax withheld from your paycheck, you should file to get a refund of the overpayment.

What happens if I move out of Indiana during the year?

You owe Indiana tax only on income earned while you were a resident. When you move, notify your employer so they stop withholding Indiana tax. You will file a part-year resident return showing income for the months you lived in Indiana and the months you did not.

Is Indiana income tax deductible on my federal return?

Yes, but only if you itemize deductions on your federal return. State and local income taxes, including Indiana's, can be deducted up to $10,000 per year under the federal cap on state and local tax deductions. Most people benefit more from the federal standard deduction and do not itemize.

Do I owe Indiana tax on unemployment benefits?

Yes. Unemployment benefits are taxable income under Indiana law. Your unemployment payments may have tax withheld if you requested it, or you may owe tax when you file your return. You can adjust your withholding on unemployment benefits by contacting the Indiana Department of Workforce Development.

What if I disagree with my tax bill?

You can file a protest with the Indiana Department of Revenue within 60 days of receiving a notice of assessment. Include documentation supporting your position. If you disagree with the department's response, you can appeal to the Indiana Tax Court, though you may want to consult a tax professional before doing so.