A trust needs its own Employer Identification Number (EIN) whenever the IRS treats it as a separate taxpayer. In practice, that means every irrevocable trust from the moment it is funded, and every revocable living trust the moment the grantor dies and the trust becomes irrevocable by operation of law. A revocable trust during the grantor’s lifetime almost never needs its own number, because the IRS looks through the trust and taxes the grantor directly.
Trusts That Need Their Own EIN
The IRS lists trusts, other than certain grantor-owned revocable trusts, among the entities that must obtain an EIN to operate.1Internal Revenue Service. Employer Identification Number A few situations force the issue:
- The trust is irrevocable. Once assets are transferred in and the grantor gives up the power to change or revoke, the assets leave the grantor’s tax picture and the trust files on its own.
- The trust is required to distribute income, or actually distributes it, to beneficiaries. The IRS needs a separate number to track what flows to whom.
- The trust has any taxable income for the year, or gross income of $600 or more. Either threshold triggers a Form 1041 filing, and Form 1041 requires an EIN.2Internal Revenue Service. Instructions for Form 1041 and Schedules A, B, G, J, and K-1
- The trust has a nonresident alien beneficiary. Even minimal income triggers a filing obligation, and with it the need for an EIN.2Internal Revenue Service. Instructions for Form 1041 and Schedules A, B, G, J, and K-1
If any of these apply, the trust is a taxpayer in its own right. It cannot use the grantor’s Social Security Number, and it cannot piggyback on a beneficiary’s.
Trusts That Can Use the Grantor’s Social Security Number
A revocable living trust, sometimes called a grantor trust, generally operates under the grantor’s SSN while the grantor is alive and retains control. The IRS treats these trusts as transparent: the grantor is still the owner for tax purposes, and the trust’s income, deductions, and credits land on the grantor’s personal Form 1040.
The Form SS-4 instructions state this directly: a trustee does not need an EIN for the trust if the trustee furnishes the grantor’s name, taxpayer identification number, and the trust’s address to all payers.3Internal Revenue Service. Instructions for Form SS-4 The tax code backs this up. When a grantor is treated as the owner of any portion of a trust, that portion’s income, deductions, and credits are included in the grantor’s own taxable income.4Office of the Law Revision Counsel. 26 USC 671 – Trust Income, Deductions, and Credits Attributable to Grantors and Others as Substantial Owners One person, one return, no separate number.
There is a narrow exception. A grantor trust that chooses not to report under the SSN method, and an IRA trust required to file Form 990-T, must obtain an EIN even though it otherwise qualifies as a grantor trust.3Internal Revenue Service. Instructions for Form SS-4
The Grantor’s Death Changes Everything
This is the transition that catches families off guard. A revocable trust that operated for years under the grantor’s Social Security Number must obtain its own EIN once the grantor dies. Without a living grantor who can change or revoke it, the trust becomes irrevocable, and the IRS treats it as a new taxpayer from the date of death forward.
The successor trustee should apply promptly. Banks and financial institutions typically freeze trust accounts once they learn of the grantor’s death and will not release them until the trust has a tax ID of its own. Any income the trust earns after the date of death is reported under the new EIN, and the trust files its own Form 1041 for the year of death, covering the period from the date of death through year-end.
Form 1041 is due by the 15th day of the fourth month after the trust’s tax year ends. For a calendar-year trust, that is April 15.5Internal Revenue Service. Forms 1041 and 1041-A – When to File The filing thresholds are the same ones that force the EIN in the first place: taxable income, $600 or more of gross income, or a nonresident alien beneficiary.2Internal Revenue Service. Instructions for Form 1041 and Schedules A, B, G, J, and K-1
How to Apply
The IRS offers three routes: online, fax, and mail. The online EIN Assistant issues the number immediately upon approval and is the fastest option. It runs Monday through Friday from 6:00 a.m. to 1:00 a.m. Eastern, Saturday from 6:00 a.m. to 9:00 p.m., and Sunday from 6:00 p.m. to midnight. To use it, the trust’s principal place of business must be in the United States, and the applicant must have the responsible party’s SSN or ITIN. The IRS limits applicants to one EIN per responsible party per day.6Internal Revenue Service. Get an Employer Identification Number
Fax applications on Form SS-4 typically produce an EIN within four business days. Mail applications take roughly four to five weeks.7Internal Revenue Service. Instructions for Form SS-4
Have the following ready before you apply: the legal name of the trust exactly as it appears in the trust document, the trustee’s name and address, the responsible party (for a trust, that is the grantor, owner, or trustor), the reason for applying (usually “created a trust”), the type of trust, and the date the trust was funded.3Internal Revenue Service. Instructions for Form SS-4
Keeping the EIN Current
Once the EIN is issued, the trustee has an ongoing obligation to keep the responsible party and address current. When a successor trustee takes over, or the trust’s mailing address changes, the new information must be reported to the IRS within 60 days on Form 8822-B.8Internal Revenue Service. About Form 8822-B, Change of Address or Responsible Party – Business Miss that window and IRS correspondence can end up with the wrong person, which creates real problems during an audit or a late-return notice. Successor trustees should treat this as one of their first administrative tasks.
What Happens If You Skip It
A trust that should have an EIN cannot file Form 1041, cannot open accounts in the trust’s name, and cannot properly report income. The penalty structure that follows is the same one that applies to all federal taxpayers. The failure-to-file penalty runs 5% of the unpaid tax for each month the return is late, capped at 25%. The failure-to-pay penalty is 0.5% per month on the unpaid balance, also capped at 25%.9Office of the Law Revision Counsel. 26 USC 6651 – Failure to File Tax Return or to Pay Tax When both penalties hit the same month, the filing penalty is reduced by the payment penalty, so the combined charge is 5% per month rather than 5.5%. Interest runs from the day after the deadline and compounds on both the tax and the penalties.
The stakes for the trustee are personal. A trustee who distributes trust assets to beneficiaries before paying outstanding taxes can be held personally liable for the shortfall, even if the distributions were made in good faith. Applying for the EIN early, and using it to file on time, is far cheaper than unwinding the problem later.