If you don’t file a deceased person’s taxes, the IRS charges failure-to-file and failure-to-pay penalties plus daily interest on any balance, the executor or administrator can be held personally liable out of their own pocket, the estate can’t close so heirs don’t receive their inheritance, and any refund the deceased was owed is never paid. Worst of all, when no return is ever filed, there is no statute of limitations: the IRS can assess the tax at any time, years or even decades later.
The person responsible is the estate’s personal representative. If there was a will, that’s the named executor. If there wasn’t, it’s whoever a probate court appoints as administrator. When no one has been formally appointed, the duty falls to a surviving spouse or whoever is in charge of the deceased’s property.1Internal Revenue Service. File the Final Income Tax Returns of a Deceased Person
Penalties and Interest Keep Compounding
The final Form 1040 is due on the same date as any other individual return. For someone who died in 2025, that’s April 15, 2026.2Internal Revenue Service. Filing a Final Federal Tax Return for Someone Who Has Died Miss it and two penalties start running at once.
The failure-to-file penalty is 5% of the unpaid tax for each month or partial month the return is overdue, capped at 25%. The failure-to-pay penalty is 0.5% per month, also capped at 25%. When both apply in the same month, the IRS reduces the filing penalty by the payment penalty, so the combined hit is 5% per month: 4.5% for filing, 0.5% for paying. After five months the filing penalty tops out, but the payment penalty keeps running on its own until it reaches its separate 25% cap.3Internal Revenue Service. Failure to File Penalty4Internal Revenue Service. Failure to Pay Penalty
If the return is more than 60 days late, a minimum penalty applies: the lesser of $525 or 100% of the tax owed. The IRS also charges interest on both the unpaid tax and the penalties themselves, compounding daily from the original due date until the balance is paid.3Internal Revenue Service. Failure to File Penalty
An extension buys time to file, not time to pay. Filing Form 4868 by the April deadline pushes the paperwork deadline to October 15, but interest still accrues on any unpaid tax from April.5Internal Revenue Service. Application for Automatic Extension of Time to File U.S. Individual Income Tax Return
No Statute of Limitations on an Unfiled Return
This is the consequence most people underestimate. The IRS normally has ten years to collect a tax debt once it’s been assessed.6Internal Revenue Service. 5.1.19 Collection Statute Expiration But assessment can’t happen until a return exists. When no return is ever filed, federal law allows the IRS to assess the tax or begin collection at any time, with no cutoff.7Office of the Law Revision Counsel. 26 U.S. Code 6501 – Limitations on Assessment and Collection
The IRS already has copies of the W-2s, 1099s, and bank reports issued in the deceased person’s name. Five, ten, or twenty years down the road, it can build a return from that data and send a bill. The estate gets no credit for deductions or credits that were never claimed, because no one claimed them.
The Executor Can Be Personally Liable
The damage doesn’t stay inside the estate. If you’re the executor or administrator and you distribute money or property to heirs before paying the estate’s federal tax debts, you can be held personally liable for the unpaid amount. Federal law puts government claims ahead of other creditors when an estate can’t cover everything, and a representative who pays other debts or hands out inheritances first owes the Treasury what should have gone to it.8Office of the Law Revision Counsel. 31 USC 3713 – Priority of Government Claims
The IRS enforces this with the same tools it uses on any taxpayer: liens on your personal property, levies on your bank accounts, garnishment of your wages. The liability runs to the full amount of the improper distribution. Hand an heir $50,000 before paying a $50,000 tax bill, and you personally owe $50,000.9Office of the Law Revision Counsel. 26 U.S. Code 6901 – Transferred Assets
There is a way to close that exposure. After the relevant tax returns have been filed, the representative can submit Form 5495 to request a formal discharge from personal liability for the deceased person’s income, gift, and estate taxes. The discharge takes effect nine months after the IRS receives the request (six months for certain fiduciary requests), or earlier if the IRS tells you an amount is owed and you pay it.10Internal Revenue Service. Form 5495 – Request for Discharge From Personal Liability Under Internal Revenue Code Section 2204 or 6905
The Estate Can’t Close and Heirs Can’t Inherit
An unfiled return jams the whole process. Probate courts generally require proof that an estate’s debts, tax liabilities included, have been resolved before authorizing the estate to close and distribute assets. Until that happens, beneficiaries can’t legally receive what the will leaves them, no matter how clear the document is.
The IRS can also file a federal tax lien against estate property. The lien attaches to everything the estate owns and has to be satisfied before any of it can be sold or transferred. For heirs waiting on a house, that means waiting, period. A straightforward estate that should wrap up in months can drag on for years when no one deals with the return.
A Refund the Deceased Was Owed Is Forfeited
Not every final return produces a balance due. If too much was withheld during the year or the deceased qualified for refundable credits, the estate may be owed money. The IRS doesn’t issue that refund automatically. The only way to collect it is to file the return.1Internal Revenue Service. File the Final Income Tax Returns of a Deceased Person
In most cases the person filing also needs to attach Form 1310 to show they have the right to receive the refund on the estate’s behalf. A surviving spouse filing a joint return doesn’t need it, and neither does a court-appointed representative who files an original return with a copy of the court certificate attached.11Internal Revenue Service. Form 1310 (Rev. December 2025) Statement of Person Claiming Refund Due a Deceased Taxpayer Skip the return, and the money simply never comes.
If the Deadline Has Already Passed
Missing the deadline isn’t the end of the road. The IRS can waive late-filing and late-payment penalties when the representative shows “reasonable cause” for the delay. The standard is whether the representative exercised ordinary care and prudence and still couldn’t comply on time. The IRS looks at what prevented timely filing, how long the delay lasted, and what was done to catch up once the obstacle cleared.12Internal Revenue Service. 20.1.1 Introduction and Penalty Relief
The death of the person who normally handled the tax obligations is specifically recognized as a circumstance that may justify relief, especially when that person had sole authority to prepare or authorize the return. The IRS weighs the severity and timing of the event, how it blocked compliance, and whether the representative attended to the tax duties within a reasonable time afterward.12Internal Revenue Service. 20.1.1 Introduction and Penalty Relief
There’s also a “first-time abatement” available to taxpayers with a clean compliance record over the prior three years. It covers failure-to-file and failure-to-pay penalties on the decedent’s final Form 1040. It does not apply to the estate tax return (Form 706).12Internal Revenue Service. 20.1.1 Introduction and Penalty Relief If the deceased filed and paid on time in the past, this is often the quickest route to getting penalties wiped out.
A Second Return the Estate May Owe
The final Form 1040 covers only income the person earned while alive. Money that comes in after the date of death, such as interest, dividends, or rental income, belongs to the estate itself. If that post-death income reaches $600 or more in a year, the estate has to file its own return on Form 1041.13Internal Revenue Service. File an Estate Tax Income Tax Return The penalties for ignoring Form 1041 match the individual return: 5% per month for late filing (up to 25%), 0.5% per month for late payment (up to 25%), and the same $525 minimum penalty when the return is more than 60 days late.14Internal Revenue Service. 2025 Instructions for Form 1041 and Schedules A, B, G, J, and K-1
A Note for Surviving Spouses
A surviving spouse can file a joint return with the deceased for the year of death, and that usually produces a lower tax bill than filing separately. The joint return captures the deceased person’s income through the date of death and the surviving spouse’s income for the full year. If a personal representative has been appointed, both the representative and the surviving spouse must agree to file jointly; if no one has been appointed by the deadline, the surviving spouse can file jointly alone. The joint option disappears if the surviving spouse remarries before year-end.15Internal Revenue Service. Publication 559 (2025), Survivors, Executors, and Administrators