Filing Taxes for a Deceased Person in Iowa: The Final IA 1040 Walkthrough

A death doesn't end someone's tax obligations. As executor or administrator, one of your first duties is filing the deceased person's final income tax returns — both federal Form 1040 and Iowa IA 1040.

If you've never done this before, the process feels more complicated than it is. Here's what the return must cover, how Iowa's new flat tax simplifies the math, and what to do when a refund is owed to the estate.

The Coverage Period for the Final Return

The final individual income tax return — state and federal — covers the period from January 1 of the year of death through the exact date of death. It does not cover any income generated by the estate after that date.

Income earned before the death date but not yet received (for example, a paycheck deposited the week after death, or dividends credited to an account post-mortem) follows the accounting method the decedent used in prior years:

• Cash basis taxpayers (most individuals): Income is included in the final return only if it was actually received before the date of death. Post-death receipts belong to the estate and are reported on the estate's fiduciary return (IA 1041).
• Accrual basis taxpayers (less common for individuals): Income is included when earned, not when received, so it may appear on the final return even if payment came after death.

What Iowa's 3.8% Flat Tax Means for the Final Return

Iowa transitioned to a flat 3.8% income tax rate effective for tax years beginning in 2026. The final IA 1040 for someone who died in 2026 uses this flat rate — no brackets, no graduated calculation.

For someone who died in 2025, Iowa was in a transitional year with reduced graduated rates. Confirm which year's rates apply based on the date of death.

The flat rate simplifies the calculation considerably. Total Iowa taxable income × 3.8% = Iowa tax liability. Subtract any withholding already paid, and the result is the balance owed or the refund due.

Gathering the Income to Report

The final IA 1040 should include all income the deceased earned and received from January 1 through the date of death:

• Wages, salary, and self-employment income (W-2s, 1099-NEC)
• Interest and dividends (1099-INT, 1099-DIV)
• Social Security benefits (SSA-1099)
• Pension and IRA distributions received before death (1099-R)
• Rental income
• Sale proceeds from property sold before death

Retirement account distributions are fully taxable at the ordinary income rate (3.8% for Iowa) unless they qualify for Iowa's retirement income exclusion. The exclusion applies to individuals who were 55 or older, disabled, or who met other specific criteria — and applies to the decedent the same way it would have applied to a living taxpayer.

Who Files the Final Return

The executor or administrator of the estate files the final return on behalf of the deceased. If the estate is in probate, the personal representative files under their authority from the Letters of Appointment.

Sign the return in the space provided for the taxpayer and write "Deceased" and the date of death next to the signature. Add your own signature as the personal representative, along with your title (Executor, Administrator, or Personal Representative).

If there is no appointed executor and the estate is not in probate, a surviving family member may file as the "personal representative" — but this approach is not always recognized by the IRS or Iowa Department of Revenue for refund purposes (see below).

Surviving Spouse: Joint Return Election

For the year of death, a surviving spouse can elect to file a joint return with the deceased. This is often advantageous because joint filing thresholds and standard deductions are higher than single-filer amounts.

The surviving spouse signs their own name, writes "Deceased" next to the deceased spouse's name, and includes the date of death. If a court-appointed executor is also involved, the executor may also need to consent.

Note: The joint return covers income earned by both spouses up to the date of the deceased spouse's death, and the surviving spouse's income for the entire year. This is a common source of confusion — the surviving spouse doesn't truncate their own income at the date of death.

What Happens If a Refund Is Owed

If the final return shows a refund, the IRS and the Iowa Department of Revenue will issue the refund check made out to the estate rather than the deceased individual.

To receive a refund on a federal return where there is no appointed executor, you'll need to file IRS Form 1310 (Statement of Person Claiming Refund Due a Deceased Taxpayer) along with the federal 1040.

For Iowa, a similar process applies. If you are a surviving spouse filing jointly, the refund can typically be directed to you without additional forms.

If probate is open, the refund goes to the estate's bank account and is distributed through the normal estate administration process.

Deadlines for the Final Return

The final IA 1040 follows the standard income tax filing deadline:

• April 15 (or April 30 if Iowa extends to the 30th — confirm for the current year) for deaths occurring in the previous calendar year

If additional time is needed, file for an extension. But remember: an extension to file is not an extension to pay. If Iowa income tax is owed on the final return, estimate it and pay by the original due date to avoid penalties.

For deaths occurring late in the year (November or December), the executor may have very little time between the death and the April filing deadline. Starting the return preparation early is essential.

The Final IA 1040 vs. the IA 1041

These are two separate, distinct filings:

IA 1040 (individual return): Covers the decedent's income from January 1 through the date of death. Filed under the decedent's Social Security Number.

IA 1041 (fiduciary return): Covers income generated by the estate after the date of death. Filed under the estate's Employer Identification Number (EIN). Required if estate gross income is $600 or more in the tax year.

Both may be due for the same calendar year. For example, if a person died on August 15, 2026, the executor must file:

• A final IA 1040 covering January 1 through August 15, 2026 (due April 15, 2027)
• An IA 1041 covering the estate's income from August 16, 2026 through the end of the estate's first tax year

Executors who think they're done once the final 1040 is filed are usually wrong — the fiduciary return is almost always required as well.

Critical Connection: The Certificate of Acquittance

The final IA 1041 — not the final IA 1040 — is the return that triggers the Iowa Certificate of Acquittance. But both returns must be filed and all balances paid before the Department of Revenue will issue the certificate.

If there is an outstanding balance or unfiled prior-year return on the individual side, it blocks the certificate. Addressing the decedent's individual tax history early — including any prior-year returns that were due but never filed — prevents this from becoming a last-minute obstacle to closing the estate.

Managing both the IA 1040 and IA 1041 filings, the Certificate of Acquittance, and the full Iowa probate timeline is exactly what the Iowa Final Tax & Estate Tax Guide is built around. It sequences the deadlines so nothing falls through the cracks during what is already a difficult time.

The Short Version

File the final IA 1040 covering January 1 through the date of death. Use Iowa's 3.8% flat rate. A surviving spouse can file jointly. An executor signs on behalf of the estate. Refunds go to the estate. The deadline is April 15 (subject to current-year Iowa guidance). The fiduciary IA 1041 is a separate requirement — and both must be resolved before the estate can close.

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