Filing a Final Income Tax Return for a Deceased Person in Oregon

When someone dies in Oregon, their personal income tax obligations don't disappear — they shift to whoever is administering the estate. The personal representative (executor) has a legal duty to file a final individual income tax return for the deceased covering the year of death. If no executor has been appointed, the responsibility typically falls to the surviving spouse or the person who administers the estate informally.

This return is separate from two other potential filings: the estate's fiduciary income tax return (Form OR-41) and the estate transfer tax return (Form OR-706). Understanding what goes on this final return versus the others prevents duplication, missed income, or incorrect reporting.

What the Final Oregon Return Covers

The final individual income tax return reports the deceased person's income from January 1 of the year of death through the exact date of death. Income stops the moment the person dies.

Everything the deceased earned or received before that date goes on this return: wages, self-employment income, Social Security benefits, retirement account distributions taken while alive, rental income (up to the date of death), investment income, and any other ordinary income.

Income that arrives after the date of death — a dividend payment that hits the estate account a week after the person died, a final paycheck issued after death, a rent check for the following month — belongs to the estate as a separate legal entity. That income goes on Form OR-41, the fiduciary income tax return, not on the final individual return.

The cutoff is clear: date of death is the line. Personal income before; estate income after.

Which Form to Use

Oregon's individual income tax return for residents is Form OR-40. For part-year residents or nonresidents, the forms are Form OR-40-P or Form OR-40-N respectively. The same form the deceased person used while alive is the right form for the final return.

At the top of the return, write "deceased" along with the date of death. The personal representative signs the return and includes a statement of their authority — typically noting that they are the executor or personal representative of the estate.

Who Files and Who Signs

If a personal representative (executor) has been officially appointed by the probate court, they have the authority and obligation to file the final return. They sign as "Personal Representative" or "Executor" in the signature line, with their own contact information.

If no formal probate has been opened — common for small estates using the Oregon Simple Estate Affidavit process — the surviving spouse or the heir claiming estate assets typically files.

If the IRS appoints a personal representative on a Form 56 (Notice Concerning Fiduciary Relationship), they sign based on that authority.

Filing a Joint Return for the Year of Death

If the deceased was married, the surviving spouse can elect to file a joint Oregon return for the year of death, just as the couple would have filed while both were alive. This option is only available for the year of death — not for subsequent years.

Filing jointly often results in a lower combined tax bill because it applies the more favorable joint tax rates to the combined income of both spouses up to the date of death. The surviving spouse signs the return, and should write "filing as surviving spouse" in the area where the deceased would have signed.

One important note: the surviving spouse can only file jointly if they have not remarried by December 31 of the year of death. If they remarry before year-end, a joint return with the deceased is no longer an option.

Deadline

The final return is due April 15 of the year following the year of death. If the person died in 2025, the final return is due April 15, 2026 — the normal tax deadline.

Extensions work the same way they do for living taxpayers. If a federal extension is filed, Oregon automatically grants a corresponding extension, pushing the deadline to October 15. However, any estimated tax owed is still due by April 15. Filing the extension without paying estimated tax due results in interest accruing from the original deadline.

If the estate expects a refund on the final return, there's no penalty for filing late — but there's no reason to wait either.

Requesting a Deceased Person's Refund

If the final return produces a refund, the IRS and the state of Oregon require additional documentation to release it. For Oregon, when someone other than a surviving spouse is claiming a refund on behalf of a deceased taxpayer, they typically need to file Form OR-243 (Claim to Refund Due a Deceased Person) along with documentation of their authority to act for the estate.

If a surviving spouse is filing jointly and a refund results, no additional form is required — the surviving spouse claims the refund directly.

Income That Goes on the Final Return vs. Form OR-41

This is the most common source of errors in the year-of-death filing:

Final return (Form OR-40):

• Wages earned up to and including the date of death
• IRA or 401(k) distributions taken by the deceased while alive
• Social Security benefits received up to the date of death
• Rental income accrued up to the date of death
• Capital gains from sales completed before death

Fiduciary return (Form OR-41):

• Any income earned by estate assets after the date of death
• Dividends paid to estate accounts after the date of death
• Capital gains from selling estate assets during probate
• Rental income from property the estate holds during administration

The split can be tricky with year-end income (dividends, year-end mutual fund distributions) that arrives after death but relates to a period before. When in doubt, follow the IRS guidance: income is reported in the year received, on whichever return covers the period when the estate received it.

What About Oregon's "Kicker" Credit?

Oregon's surplus kicker credit is applied on the personal return for the year in which the kicker applies. If the deceased was entitled to a kicker credit on their 2025 return based on their 2024 tax liability, that credit appears on the 2025 final Form OR-40.

For the 2025 tax year, the kicker is 9.863% of the 2024 Oregon tax liability before credits. Make sure the personal representative calculates and claims this if applicable — it's a refundable credit that can generate a cash refund even if no 2025 tax is owed.

Common Mistakes on the Final Return

Including income that belongs on the fiduciary return. Adding post-death income to the final personal return inflates it and creates a mismatch with information returns (1099s issued to the estate).

Using the Social Security number after death. Once the estate is opened, financial transactions should use the estate's separate Employer Identification Number (EIN), not the deceased person's Social Security number. The final personal return uses the SSN — but fiduciary returns require the EIN.

Missing deductions. The final return is eligible for the same deductions as any other individual return: standard or itemized deductions, retirement contribution deductions for contributions made before death, charitable deductions.

Failing to file at all. In the chaos of administering an estate, some personal representatives don't realize a final personal return is required. Oregon and the IRS will eventually notice, particularly if the deceased had W-2 income or regular 1099 filings. Late-filing penalties apply.

Sequencing the Three Oregon Returns

Most Oregon estates will need to manage three returns in overlapping timelines:

1. Final Form OR-40 — due April 15 of the following year
2. Form OR-41 (if estate income exceeds $600) — due April 15 for calendar-year estates
3. Form OR-706 (if gross estate exceeds $1,000,000) — due 12 months after the date of death

The first two often have the same deadline. If the estate is large enough to trigger OR-706, the payment is due 12 months after death regardless of when the filing deadline falls for the other two.

Working through all three in the right sequence — with the right information on each — is the core challenge of Oregon estate tax administration. The Oregon Final Tax & Estate Tax Guide provides a step-by-step roadmap through each return, with checklists for income categorization, deadline tracking, and the documentation each form requires.

See more Oregon guides →