Indiana (IN)
April 15, 2026
November 16, 2026
✓ Automatic w/ Federal
IN — IndianaIndiana Personal Income Tax Extension — What You Need to Do
Indiana gives you until November 16, 2026 to file — a full month past the federal extended deadline. A federal extension gets you there automatically; without one, file Form IT-9 or request an extension through INTIME by April 15. The catch is payment: Indiana requires you to have paid at least 90% of the tax you owe by April 15, 2026, or the penalty applies anyway.
Indiana Extension Checklist — 2026
Three things to handle. Two deadlines that matter.
April 15, 2026
Get Your Extension in Place
Indiana follows your federal extension, or it needs Form IT-9 — filed by the original due date either way.
Have a Federal Extension
Nothing to file with Indiana. Your federal Form 4868 automatically extends your Indiana return to November 16, 2026.
File Form IT-9 or Use INTIME
Form IT-9 (Application for Extension of Time to File)
Submit through INTIME or mail Form IT-9 on or before April 15, 2026.
April 15, 2026
Pay At Least 90% of What You Owe
Bank Account via INTIME
INTIME e-Services Portal
No Form IT-9 needed. Payments can be made without logging in.
Credit / Debit Card
Available through INTIME or by phone. A third-party processing fee applies.
November 16, 2026
File Federal + Indiana Return
File your federal return now and add your Indiana state return — Form IT-40 — in the same session. Filing sooner means a faster refund. Your Indiana extended deadline is November 16.
Start Federal + Indiana Return →
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Indiana Late Filing & Payment Penalties — What It Costs to Wait
The extension gives you until November 16 to file. But unpaid tax starts costing you money the day after April 15.
| Penalty Type | Rate | Minimum | Trigger |
|---|---|---|---|
| Late Payment | 10% of tax due with the return | $5 | Less than 90% paid by April 15 |
| Failure to File | 20% of unpaid tax | — | No return filed and no valid extension |
| Underpaid Estimated Tax | 10% of the underpayment | — | Insufficient estimated payments during the year |
| Interest | 7% per year (2026) | No cap | Accrues from April 15 on any unpaid balance |
Indiana State Extension Details
| Extension Type | Automatic with Federal Extension |
| Original Filing Deadline | April 15, 2026 |
| Extended Filing Deadline | November 16, 2026 |
| Extension Period | 7 months — one month beyond the federal extended deadline |
| Extension Form | None with a federal extension — otherwise Form IT-9 or a request through INTIME |
| Return Form | Form IT-40 (full-year residents) |
| Nonresident / Part-Year | Form IT-40PNR — or Form IT-40RNR for full-year residents of reciprocal states |
| Federal Extension Required? | No — but it is the simplest route. Without one, file Form IT-9 |
| Payment Deadline | April 15, 2026 (extension does not extend payment) |
| The 90% Rule | Pay at least 90% of state and county tax by April 15, 2026 and the balance by November 16, 2026 to have the penalty waived |
| Extension Payment Address | Form IT-9 — P.O. Box 6117, Indianapolis, IN 46206-6117 |
| Return Address (with payment) | P.O. Box 7224, Indianapolis, IN 46207-7224 |
| Return Address (refund / no payment) | P.O. Box 40, Indianapolis, IN 46206-0040 |
| Online Payment Portal | INTIME |
| State Agency | Indiana Department of Revenue |
| Late Payment Penalty | 10% of tax due with the return, minimum $5 |
| Failure to File Penalty | 20% of unpaid tax |
| Interest Rate (2026) | 7% per year, effective January 1, 2026 |
Indiana Tax Extension — Frequently Asked Questions
Do I need to file anything to get the Indiana extension?
Not if you have a federal extension — Indiana honors Form 4868 automatically. If you don’t have one, request an extension through INTIME or file Form IT-9 on or before April 15, 2026.
What is Indiana’s 90% rule?
Indiana waives the late-payment penalty only if you paid at least 90% of your total state and county income tax by April 15, 2026 and pay the remaining balance by November 16, 2026. Withholding from your paychecks counts toward the 90%.
Why is Indiana’s deadline in November instead of October?
Indiana adds a month to the federal extended deadline. When Form 4868 moves your federal date to October 15, your Indiana date becomes November 15 — and because November 15, 2026 falls on a Sunday, the 2026 deadline is November 16.
Does the Indiana extension cover my federal return?
No. It works the other way around — a federal extension covers Indiana, but Form IT-9 only covers your Indiana filing. Your federal return still requires Form 4868 if you need more time with the IRS.
Which Indiana return form do I need?
Form IT-40 is the full-year resident return. Part-year residents and nonresidents file Form IT-40PNR. Full-year residents of a reciprocal state with only Indiana wage income file Form IT-40RNR.
Is my Indiana refund delayed if I use the extension?
Yes — the Indiana Department of Revenue can’t process your refund until you file your completed return. If you expect a refund, file as soon as you’re ready rather than waiting until November 16.
Ready to File? Start Federal + Indiana
File your federal return and add Indiana state in the same session. November 16 extended deadline — secure, fast, with live support.