Critical Income Tax Return Deadlines for 2025: What Indiana Residents Need to Know

As the tax season approaches, Indiana taxpayers are urged to prepare for key income tax return deadlines for 2025 to avoid penalties and interest. The due date to file Indiana individual income tax returns for the tax year 2024 is April 15, 2025, which also serves as the payment deadline for any taxes owed.

Indiana aligns its state tax filing deadline with the federal deadline, meaning taxpayers must submit their returns and pay any outstanding tax by April 15, 2025. Failure to pay by this date will result in penalties and interest calculated from the deadline onward.

Taxpayers who are unable to file their state return by April 15 have the option to request an extension. If you have secured a federal extension, you automatically receive a state extension, granting until November 17, 2025, to file the Indiana tax return and settle any remaining balance. Alternatively, those without a federal extension must file a state extension request (Form IT-9) on or before April 15 to receive the same extension window.

It is crucial to note that while the extension allows additional time to file the return, it does not extend the time to pay taxes owed. To avoid penalties, taxpayers should ensure they pay at least 90% of their estimated tax liability by April 15. Provided this payment is made, the penalty on the balance will be waived if the remaining tax and interest are paid in full by November 17, 2025.

Special considerations apply to military personnel. Active-duty members stationed outside the U.S. and Puerto Rico receive an automatic 60-day extension, with those serving in combat zones receiving up to 180 days after leaving the combat zone to file.

For corporate taxpayers, Indiana requires corporate income tax returns and payments to be filed by April 15, 2026, with an automatic six-month filing extension available. However, the filing extension does not extend payment deadlines.

Taxpayers are encouraged to use Indiana Department of Revenue's INTIME online service for filing and extension requests, which simplifies the process and helps ensure timely submissions.

Staying informed and meeting deadlines is critical for avoiding unnecessary fees and stress. Indiana residents and business operators should prepare their documents early and consider consulting with tax professionals for complex situations.