If you are settling a small estate, you need an EIN whenever the estate earns $600 or more in gross income during a tax year, pays wages to anyone, or continues operating a business the decedent owned.1Internal Revenue Service. 2025 Instructions for Form 1041 and Schedules A, B, G, J, and K-1 Even below those thresholds, most banks will not open an estate account or retitle the decedent’s assets without one, so as a practical matter most executors apply regardless. The real question is usually not whether you need an EIN but whether the estate has income you haven’t counted yet.
What Actually Triggers the Requirement
The IRS requires every estate that files Form 1041, the estate income tax return, to have an EIN.1Internal Revenue Service. 2025 Instructions for Form 1041 and Schedules A, B, G, J, and K-1 The filing requirement kicks in as soon as the estate’s gross income reaches $600 for the tax year. Gross income here covers the categories you would expect on a personal return: interest and dividends from the decedent’s investment accounts, rental income from property the estate holds, capital gains if you sell stocks or real estate, and business income if a business kept running after death.
Two other situations trigger the requirement no matter how little income the estate has. If the estate pays wages to anyone, even a part-time caretaker or property manager, it needs an EIN to handle payroll tax reporting and withholding. And if the decedent owned a business that keeps operating, the estate must obtain a new EIN for that business, separate from both the decedent’s old business EIN and the estate’s own EIN.2Internal Revenue Service. Responsibilities of an Estate Administrator
When a Small Estate Can Skip It
If the estate generates no income at all, you can skip the EIN. This happens when the estate holds only personal property like furniture, vehicles, or clothing, or when its only financial accounts are non-interest-bearing checking accounts. No income means no Form 1041, and no Form 1041 means no EIN.1Internal Revenue Service. 2025 Instructions for Form 1041 and Schedules A, B, G, J, and K-1
Be careful with this call. A savings account earning $50 in interest looks trivial, but if the estate also holds a small stock portfolio throwing off $560 in dividends, you have already cleared the threshold. Executors routinely undercount by forgetting accrued interest, mutual fund distributions, and income the decedent earned between January 1 and the date of death that ends up on the estate’s return rather than the individual final return.
There is also the bank problem. Financial institutions almost always require an EIN before they will open an estate checking account or retitle the decedent’s holdings, even when the estate has no filing obligation. If you plan to consolidate accounts or receive checks made out to the estate, you will likely need the number whether the IRS technically requires it or not.
The Decedent’s Final Return Is a Separate Filing
One point of confusion worth clearing up: the estate’s EIN has nothing to do with the decedent’s final individual income tax return. As executor, you file a Form 1040 covering the period from January 1 through the date of death, and that return uses the decedent’s Social Security Number, not the estate’s EIN.3Internal Revenue Service. Filing a Final Federal Tax Return for Someone Who Has Died Only income earned after the date of death belongs on Form 1041 under the estate’s EIN. Two different returns, two different identification numbers, and mixing them up is one of the fastest ways to create IRS problems.
To formally notify the IRS that you are acting as the estate’s fiduciary, file Form 56 (Notice Concerning Fiduciary Relationship). This establishes your authority to handle the decedent’s tax matters and the estate’s filings.4Internal Revenue Service. About Form 56, Notice Concerning Fiduciary Relationship
How to Apply
The executor or personal representative applies. On the application, this person is listed as the “responsible party,” which the IRS defines as the individual who ultimately controls the entity and the disposition of its funds and assets.5Internal Revenue Service. Instructions for Form SS-4 Before starting, gather the decedent’s full legal name, Social Security Number, and date of death, along with your own SSN and contact information.
The fastest route is the IRS online EIN application. It is free and issues the number immediately upon approval. The online tool is available Monday through Friday from 6:00 a.m. to 1:00 a.m., Saturday from 6:00 a.m. to 9:00 p.m., and Sunday from 6:00 p.m. to midnight, all Eastern time.6Internal Revenue Service. Get an Employer Identification Number You can also fax Form SS-4 and receive the EIN within about four business days, or mail it in and wait four to five weeks.5Internal Revenue Service. Instructions for Form SS-4
A few application details to get right: enter the estate’s legal name on Line 1 (if the estate has no formal legal name, use the decedent’s name followed by “Estate”), put the executor’s name on Line 3, and enter the date of death on Line 11.5Internal Revenue Service. Instructions for Form SS-4 Once issued, use the EIN on every estate tax filing and financial transaction going forward.
If There’s a Revocable Living Trust
Small estates often sit alongside a revocable living trust the decedent set up to avoid probate. The trust’s tax situation changes the moment the grantor dies. During the grantor’s lifetime, a revocable trust is typically ignored for income tax purposes, and all income flows onto the grantor’s personal return under the grantor’s SSN.1Internal Revenue Service. 2025 Instructions for Form 1041 and Schedules A, B, G, J, and K-1 After death, the trust becomes a separate taxpayer. It needs its own EIN and must file its own Form 1041 if it meets the income thresholds. The grantor’s SSN can no longer be used for the trust’s tax reporting.
This catches families off guard because the point of the trust was to avoid probate, and they assumed it would also skip the tax paperwork. It doesn’t. The trustee should apply for a new EIN promptly and notify the financial institutions holding trust assets so future income reporting ties to the correct number.
What Happens If You Skip It
If the estate is required to file Form 1041 and you don’t, the IRS treats it like any other unfiled return. The failure-to-file penalty runs 5% of the unpaid tax for each month the return is late, capped at 25%.7Office of the Law Revision Counsel. 26 USC 6651 – Failure to File Tax Return or to Pay Tax A separate failure-to-pay penalty of 0.5% per month applies to any unpaid balance, also capped at 25%.8eCFR. 26 CFR 301.6651-1 – Failure to File Tax Return or to Pay Tax Interest accrues on both the unpaid tax and the penalties from the original due date.
The exposure gets worse if the estate has employees. Federal law imposes personal liability on any person responsible for collecting and paying over employment taxes who willfully fails to do so, with a penalty equal to the full amount of the unpaid tax.9Office of the Law Revision Counsel. 26 USC 6672 – Failure to Collect and Pay Over Tax, or Attempt to Evade or Defeat Tax As executor, you are the responsible party, meaning the IRS can pursue your personal assets to recover those employment taxes.
The practical fallout stacks on top of the IRS penalties. Without an EIN, you cannot open estate bank accounts, file required returns, or issue Schedule K-1s to beneficiaries so they can report their share of estate income on their own returns.10Internal Revenue Service. Instructions for Form 1041 and Schedules A, B, G, J, and K-1 (2025) Asset distributions stall, beneficiaries get frustrated, and the longer the delay runs, the more likely someone files a complaint with the probate court questioning how you are handling the estate.