Clear Money Guide
What this guide covers
A quick view of the questions and evidence developed below.
Updated July 31, 2026. Quick answer: a deceased person’s final income tax return is due the normal April 15 of the year after death (extendable to October 15) — and the return splits the year at the date of death: income received before it goes on the final Form 1040; income the estate receives after it goes on the estate’s own return (Form 1041). Getting that split wrong is the most common DIY error in estate tax filing.
The refund side has rules of its own, and two of them cut against instinct: a court-appointed representative filing the original return does not file Form 1310 at all (the court certificate goes with the return instead), and Line C filers are told not to attach the death certificate — claiming a refund due a deceased taxpayer works through all three boxes.
If any of the money came from outside the United States, a separate obligation can arise that has nothing to do with the return: receipts above $100,000 from a nonresident alien individual or a foreign estate are reportable on Form 3520. ⚠️ The inheritance is generally not taxable income — but the penalty for not reporting is measured against the gift, and the filing deadline is not tied to the income tax return’s.
Two returns, one split date, several elections – in a hard year.
This is the filing season families most often hand to a professional. The matching service below introduces you to advisers who pay to meet you.
Before you start, what actually happens. The form is run by Kapitalwise, our advisor-matching partner. Kapitalwise sends your details to advisers who pay for the introduction, so expect calls and texts. Clear Money Guide is paid when you submit the form, whether or not you ever hire anyone. This is free to you and there is no obligation to hire anyone.
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The rules that surprise people
A surviving spouse can still file jointly for the year of death — full joint brackets one last time — and the executor signs for the decedent. Refunds need Form 1310 unless a surviving spouse on a joint return is claiming it. Medical expenses paid within a year after death can be elected backward onto the final 1040 as if paid before death — often worth real money after an expensive final illness. And the estate’s 1041 has its own elections (including a fiscal year) that can defer and smooth tax — a genuinely useful lever when the estate holds income-producing assets.
What the survivor’s OWN taxes look like next year — the brackets halving while income does not — is its own planning problem: the deadlines calculator holds the dates, and the survivor-side decisions live in the site’s surviving-spouse guides.