No, you do not need a Social Security Number to set up a trust fund, but every trust needs some kind of taxpayer identification number. If you’re creating a revocable living trust and you’re alive, your own SSN serves as the trust’s number and nothing more is required. Irrevocable trusts, and revocable trusts after the grantor dies, need their own Employer Identification Number from the IRS. People who aren’t eligible for an SSN at all can use an Individual Taxpayer Identification Number instead. Which number applies depends on the type of trust, who created it, and whether the grantor is still living.
When Your SSN Is All the Trust Needs
Create a revocable living trust while you’re alive and the IRS treats it as an extension of you. Income from trust assets gets reported on your personal Form 1040 under your own SSN. Federal law requires a proper identifying number on every return and tax document, and for individuals that number is their Social Security Number.1Office of the Law Revision Counsel. 26 USC 6109 – Identifying Numbers
You have options for how to report. The simplest is to let all trust income flow onto your 1040 under your SSN with no separate trust return. You can also file a Form 1041 for the trust with a statement attached showing all income is taxable to you personally. Either way, no separate EIN is required as long as you’re alive and the trust remains revocable.2Internal Revenue Service. Instructions for Form 1041 and Schedules A, B, G, J, and K-1 (2025)
For most people setting up a basic living trust, that’s the whole answer. Use your SSN, report trust income on your personal return, keep moving. The rules get more involved when the trust is irrevocable or when the grantor dies.
When the Trust Needs Its Own EIN
An Employer Identification Number is a nine-digit number the IRS assigns to entities including businesses, estates, and certain trusts. For a trust, it works like a Social Security Number for the trust itself. Three common situations require one:
- The trust is irrevocable. The IRS treats it as a separate taxpayer that files its own Form 1041, and that requires an EIN.
- The grantor of a revocable trust has died. The trust typically becomes irrevocable at that point, the grantor’s SSN can no longer be used, and the successor trustee must obtain a new EIN.
- The trust is required to file Form 1041. The filing threshold is $600 or more in gross income, or any amount of taxable income.2Internal Revenue Service. Instructions for Form 1041 and Schedules A, B, G, J, and K-1 (2025)
Banks and brokerages also use the EIN when opening accounts in the trust’s name, so without one the trust can’t hold assets or process transactions. Successor trustees who delay after a grantor dies tend to run into trouble quickly. Accounts tied to the deceased grantor’s SSN can be frozen, and the trust can’t file its required return without an EIN. There’s no separately published deadline for getting the number, but the first Form 1041 is due by the 15th day of the fourth month after the close of the trust’s tax year, and filing isn’t possible without one.
How to Get an EIN for the Trust
An EIN from the IRS is free. Don’t pay a third-party website for it, even though plenty of sites try to charge.3Internal Revenue Service. Get an Employer Identification Number
The fastest route is the IRS online application at irs.gov/EIN. The person applying, usually the trustee, needs their own SSN or ITIN to verify identity. During the application you select “trust” as the entity type, indicate whether it is revocable or irrevocable, enter the trustee’s information, give the trust’s name and the date it was funded, and submit. If approved, the EIN appears on screen immediately. The online system runs Monday through Friday, 7:00 a.m. to 10:00 p.m. Eastern.4Internal Revenue Service. Instructions for Form SS-4 Application for Employer Identification Number
If online won’t work, you can apply by fax or by mail using Form SS-4. Fax typically takes about four business days. Mail should go in at least four to five weeks before you need the number. Both are handled by the IRS EIN Operation office in Cincinnati, Ohio.4Internal Revenue Service. Instructions for Form SS-4 Application for Employer Identification Number
If You Don’t Have an SSN
Not everyone involved with a U.S. trust is eligible for a Social Security Number. Non-resident aliens named as beneficiaries, for example, still need a taxpayer identification number for distributions and IRS reporting. The answer is an Individual Taxpayer Identification Number, a nine-digit number the IRS issues to people who need a U.S. taxpayer ID for federal tax purposes but don’t qualify for an SSN.5Internal Revenue Service. Individual Taxpayer Identification Number (ITIN)
An ITIN lets a trustee complete Schedule K-1 for a foreign beneficiary and lets the beneficiary claim treaty benefits or file a U.S. return reporting trust income.6Internal Revenue Service. U.S. Taxpayer Identification Number Requirement You apply using Form W-7 and submit original identity documents, or certified copies from the issuing agency, proving both identity and foreign status.7Internal Revenue Service. Instructions for Form W-7 (12/2024) The IRS says to allow seven weeks for processing, stretching to nine or eleven weeks during tax season (January 15 through April 30) or for overseas applicants.5Internal Revenue Service. Individual Taxpayer Identification Number (ITIN) If a distribution is going to depend on the beneficiary’s ITIN, start the application well in advance.
What About the Beneficiaries’ Numbers?
A common worry when drafting a trust is whether every beneficiary’s SSN has to appear in the trust document. It doesn’t. Beneficiary SSNs are needed for tax reporting, not for the legal creation of the trust. Leaving them out of the document itself is common practice, since trusts can end up in court records and no one wants an SSN in a public file.
Where the numbers do matter is on the trust’s tax filings. When a trust distributes income, the trustee reports each beneficiary’s share on Schedule K-1 of Form 1041, and that form carries the beneficiary’s SSN or ITIN.8Internal Revenue Service. 2025 Instructions for Schedule K-1 (Form 1041) for a Beneficiary Filing Form 1040 or 1040-SR Trustees usually collect that information with a Form W-9 from each beneficiary, which certifies the person’s name, address, and taxpayer identification number.9Internal Revenue Service. Form W-9 Request for Taxpayer Identification Number and Certification
What Goes Wrong Without the Right Number
Missing or incorrect taxpayer identification numbers have real financial consequences. If a beneficiary doesn’t furnish a correct TIN, or the IRS notifies the payor that the number on file is wrong, federal backup withholding kicks in at 24% of the payment.10Internal Revenue Service. Backup Withholding That money goes to the IRS. The beneficiary can claim it back as a credit on their return, but the distribution itself comes up short.
Trustees who file information returns with missing or incorrect TINs also face per-return penalties that scale with how late the return is, and the top tier, for intentional disregard, carries no maximum cap.11Internal Revenue Service. Information Return Penalties A trust with multiple beneficiaries and regular distributions can see those penalties pile up fast.
The expensive mistake usually isn’t picking the wrong number up front. It’s waiting too long after a triggering event, especially a grantor’s death, to get the new EIN in place.