Filing Taxes for a Deceased Person in Indiana

Losing someone close means dealing with grief and, almost immediately, a stack of financial and legal obligations that don't pause for mourning. Filing the deceased person's final Indiana income tax return is one of the first tax tasks an executor or surviving family member faces — and it's one that confuses people because it looks like ordinary tax filing but comes with a different set of rules for who signs, what income counts, and what happens to any refund.

This guide covers the Indiana IT-40 final return for a deceased individual — not the estate's own income tax return (that's a different form, the IT-41, filed separately). Understanding the difference between the two is the first step to getting both right.

What the Final IT-40 Covers

The final Indiana individual income tax return (Form IT-40) covers income the deceased person earned from January 1 of the year of death through the date of death. Nothing more. Income that arrives after the date of death — a final paycheck deposited the day after someone passes, rental income that keeps flowing in, interest accruing in bank accounts — belongs to the estate, not the decedent. That income gets reported on Form IT-41, the Indiana Fiduciary Income Tax Return, filed under the estate's own EIN.

Many executors try to put everything on one return. That's incorrect and creates problems with both state and federal agencies. The final IT-40 stops at the date of death; everything after goes on IT-41.

Do You Actually Need to File?

Indiana has minimum gross income thresholds below which a final return isn't required:

• Under age 65 at death: File if gross income exceeded $1,000
• Age 65 or older at death: File if gross income exceeded $2,000
• Nonresidents with any Indiana-source income: File regardless of amount

"Gross income" here means total income before deductions — wages, salaries, business income, investment income, retirement distributions, and any other taxable income received from January 1 through the date of death.

If the deceased person would normally be below the threshold but had Indiana tax withheld from wages or retirement distributions, it's still worth filing — it's the only way to get that withholding refunded.

When in doubt, file. The IRS and Indiana DOR both match returns against W-2 and 1099 information, and a missing return triggers more complications than a simple filing does.

The April 15 Deadline

The final IT-40 is due April 15 of the year following the year of death — the same deadline as an ordinary individual income tax return. If someone dies on November 3, 2025, their final IT-40 is due April 15, 2026.

Extensions follow the same rules as for living taxpayers. File Indiana Form IT-9 (Application for Extension of Time to File) or have a federal extension in place. Indiana grants a 30-day extension automatically if you have a valid federal extension. An extension gives you more time to file — not more time to pay. If Indiana tax is owed, pay an estimate before April 15 to avoid interest and penalties.

Who Signs the Return

This is where a lot of people get stuck. The deceased person obviously can't sign their own return, so the rules for signatures depend on who is handling the estate.

Surviving spouse (joint return): If you are the surviving spouse and you are filing a joint return for the year of death, you sign the return in your own name. Write "Filing as Surviving Spouse" across the signature line where the deceased would have signed. No court appointment is needed.

Court-appointed executor or administrator: If the court has formally appointed you as executor or personal representative, sign on behalf of the deceased taxpayer and add your title — for example, "Jane Smith, Executor of the Estate of John Smith." You may be required to attach a copy of the court appointment letters.

No executor appointed: If there is no court-appointed executor — common in small estates handled informally — a person acting in place of the executor can file. Write the filer's relationship to the decedent on the signature line (for example, "Adult child of decedent") and sign in that capacity.

For Indiana returns, the DOR generally follows federal rules on this. If you are also filing a federal Form 1040 for the same decedent, whoever signs the federal return signs the state return in the same capacity.

Joint Returns for the Year of Death

A surviving spouse can file a joint return with the deceased spouse for the year of death, even if the spouse died early in the year, as long as the surviving spouse did not remarry before December 31 of that year. Filing jointly typically produces a lower combined tax liability because the joint filing thresholds and tax treatment are more favorable.

The joint return covers the deceased spouse's income from January 1 through the date of death plus the surviving spouse's income for the entire year. The surviving spouse signs the return as described above.

If a personal representative has been appointed and disagrees with the surviving spouse's choice to file jointly, the personal representative has final authority over the deceased's portion of the return. In practice, surviving spouses and executors almost always agree to file jointly because it reduces the tax due.

What About an Uncashed or Unissued Refund?

Sometimes the deceased taxpayer was owed a refund but died before cashing the check, or a refund check arrived after the death. Indiana handles this through the State Comptroller's office, not the DOR.

To claim the refund on behalf of the estate or heirs, file Indiana Form IN-1310 (Statement of Person Claiming Refund Due a Deceased Taxpayer) with the DOR. This is similar to the federal Form 1310. Alternatively, if you have a Power of Attorney on file (Form POA-20), that may authorize you to handle the refund, though POA authority typically ends at death and you'll usually need to follow the IN-1310 process.

The refund, once issued to the estate, should be deposited into the estate checking account and treated as an estate asset. It then flows through the estate administration process — subject to creditor claims in the same order as other assets before being distributed to beneficiaries.

If the refund check was made out to the deceased person and was never cashed, do not attempt to endorse and deposit it. Contact the Indiana DOR and explain the situation. They will reissue the check payable to the estate or follow the IN-1310 process.

If you're working through both the final IT-40 for the decedent and the IT-41 for the estate's ongoing income, sequencing these correctly matters. The Indiana Final Tax & Estate Tax Guide at /us/indiana/estate-tax/ covers both returns in order and explains how to handle income that crosses the date of death.

The IT-40 vs. IT-41: Which Income Goes Where

This distinction is worth spelling out clearly because it's the most common point of confusion:

The "after date of death" line is the dividing point. A paycheck for work performed before death but deposited one day after death goes on the IT-41. Interest that accrued before death but was credited after death typically goes on the IT-41. When in doubt, date of crediting — not date of earning — usually controls.

For retirement accounts like IRAs and 401(k)s, the required minimum distribution (RMD) for the year of death (if not yet taken by the decedent) must still be taken. The portion taken before death goes on the final IT-40; the portion taken after death by the beneficiary or estate goes on the IT-41 or the beneficiary's own return, depending on who takes the distribution.

Penalties for Late Filing

Indiana's late-filing penalty for IT-40 is $10 per day, up to a maximum of $250. The late-payment penalty is 10% of any unpaid tax. Interest accrues on unpaid balances. These penalties apply even when the taxpayer is deceased — the estate is responsible.

The Indiana DOR can waive penalties for reasonable cause, but the process requires a written waiver request and documentation. Calendaring the April 15 deadline early — even when dealing with grief and a complex estate — avoids this entirely.

Bottom Line

The final Indiana IT-40 for a deceased person covers income earned from January 1 through the date of death, is due April 15 of the following year, and must be signed by the surviving spouse, executor, or a person acting in that capacity. It is a separate filing from Form IT-41, which covers income the estate itself earns after death.

For a complete guide to Indiana tax filings after death — including both the IT-40 and IT-41, property tax notifications, and the full deadline calendar — see the Indiana Final Tax & Estate Tax Guide at /us/indiana/estate-tax/.

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