What Is the Difference Between a Revocable and Irrevocable Trust EIN?
A revocable trust uses the grantor's 9-digit SSN and needs no EIN while the grantor lives. An irrevocable trust is a separate taxpayer, so it needs its own EIN from day 1. Both numbers cost $0.
| Trust type | Own EIN? | Tax number used | Return filed |
|---|---|---|---|
| Revocable living trust, grantor alive | No | Grantor's SSN | Grantor's Form 1040 |
| Revocable trust after grantor dies | Yes | New trust EIN | Form 1041 |
| Irrevocable trust | Yes | Trust EIN | Form 1041 |
| Joint revocable trust, both alive | No | A grantor's SSN | Form 1040 |
| Charitable or special-needs trust | Yes | Trust EIN | Form 1041 |
Source: IRS Form 1041 instructions and 26 U.S.C. section 6109, verified August 2026.
An EIN is 9 digits in the format XX-XXXXXXX, the same structure used for every business and entity. The full anatomy of the number, including the 2-digit prefix, sits on what is an EIN, and the identical FEIN label is explained on what is a FEIN.
The revocable-versus-irrevocable line also decides who controls the assets. A grantor of a revocable trust keeps the power to amend or cancel it, so the IRS ignores the trust as a separate taxpayer. An irrevocable trust removes that control, which is why it becomes its own taxpayer with its own EIN. A joint revocable trust held by 2 spouses still reports under 1 spouse's SSN while both live. Once the trust holds an EIN, the trustee uses it on every account, and the steps for putting that 9-digit number to work sit on the using your EIN page.
No SSN. No passport upload.
When Does a Revocable Trust Need Its Own EIN?
The day the grantor dies. At that moment the revocable trust becomes irrevocable, turns into a separate taxpayer, and must get an EIN on Form SS-4. Before that death it uses the grantor's SSN and needs 0 EIN.
| Stage | Tax number | Return |
|---|---|---|
| Grantor alive, trust revocable | Grantor's 9-digit SSN | Grantor's Form 1040 |
| Grantor dies, trust becomes irrevocable | Apply for a new EIN on SS-4 | Form 1041 at $600 income |
| Successor trustee files Form 56 | Same new trust EIN | Form 1041 each year |
| Trust fully distributed and closed | EIN retired, never reused | Final Form 1041 |
Source: IRS Form SS-4 and Form 1041 instructions, verified August 2026.
The successor trustee applies as the responsible party and files Form 56 to notify the IRS of the fiduciary relationship. A revocable trust that already carried an EIN before death still takes a new one after death, because the post-death trust is a distinct taxpayer. That new-number rule mirrors the triggers listed on new EIN rules.
A trustee who takes over after a death has a short list of tasks. First, apply for the new trust EIN on Form SS-4. Second, file Form 56 to register as the fiduciary. Third, retitle the accounts into the irrevocable trust under the new 9-digit number. The trust then files Form 1041 for every year its gross income reaches $600. Compare the cost of that filing against the free EIN itself on the LLC EIN cost page.
How Do You Get an EIN for a Trust?
File Form SS-4 with the trustee as the responsible party. There are 4 ways: online in 15 minutes with an SSN, by fax in 4 to 7 business days, by mail in 6 to 11 weeks, or by phone for international trustees. All 4 cost $0.
| Method | Time to EIN | Trustee SSN needed? | IRS fee |
|---|---|---|---|
| IRS online assistant | About 15 minutes | Yes | $0 |
| Fax Form SS-4 | 4 to 7 business days | No | $0 |
| Mail Form SS-4 | 6 to 11 weeks | No | $0 |
| Phone, international only | On the call | No | $0 |
Source: IRS Form SS-4 instructions, verified August 2026.
On Form SS-4, line 9a is checked Trust, and the trustee is named as the responsible party on line 7a with that person's SSN or ITIN on line 7b. A trustee with no SSN enters the word Foreign on line 7b and faxes the form to 855-641-6935 inside the US or 855-215-1627 from abroad, then waits 4 to 7 business days. A trustee outside the US calls the IRS at 267-941-1099 and receives the number on the call. The step-by-step route is on how to get an EIN, and the IRS assistant itself on the IRS EIN number tool.
Keep 3 details ready before applying. Line 1 carries the exact trust name from the trust document. Line 9a is checked Trust, and line 11 shows the date the trust was funded. A clean Form SS-4 returns the CP-575 confirmation letter faster and avoids a second IRS review of the 9-digit number.
No SSN. No passport upload.
Does a Trust File Form 1041?
Yes, once it has an EIN and $600 or more of annual gross income. Form 1041 is the income tax return for estates and trusts. A trust that pays out income issues each beneficiary a Schedule K-1.
| Situation | EIN? | Form 1041? | Threshold |
|---|---|---|---|
| Revocable trust, grantor alive | No | No | Reported on Form 1040 |
| Irrevocable trust, gross income under $600 | Yes | No 1041 required | $600 gross income |
| Irrevocable trust, gross income $600 or more | Yes | Yes | $600 gross income |
| Trust with a nonresident beneficiary | Yes | Yes | Any taxable income |
Source: IRS Instructions for Form 1041, verified August 2026.
The $600 test looks at gross income, not net. A trust that earns $600 of interest, dividends, or rent files Form 1041 even when it distributes every dollar out. Income kept inside the trust is taxed to the trust; income paid out is taxed to the beneficiary on a Schedule K-1. To confirm a trust's assigned number before filing, follow how to verify an EIN.
The trust's tax year shapes the deadline. A calendar-year trust files Form 1041 by April 15, matching the individual deadline. A trust requests an automatic 5-and-a-half-month extension on Form 7004. Compressed brackets make trust rates climb fast: a trust reaches the top 37% federal rate at about $15,650 of retained income in 2026. Distributing income to beneficiaries shifts that tax onto their lower personal returns through the Schedule K-1. A trust uses the same 9-digit EIN on every 1041 it ever files, and the confirming route sits on the IRS EIN number page.
Trust EIN vs Estate EIN?
A trust EIN identifies a trust; an estate EIN identifies a deceased person's estate. Both are 9 digits, both cost $0, and both file Form 1041 at $600 of income. 1 person can leave 2 separate taxpayers.
| Feature | Trust EIN | Estate EIN |
|---|---|---|
| Identifies | A trust | A deceased person's estate |
| Responsible party | Trustee | Executor or administrator |
| Income return | Form 1041 | Form 1041 |
| Filing threshold | $600 gross income | $600 gross income |
| IRS fee | $0 | $0 |
| Format | XX-XXXXXXX | XX-XXXXXXX |
When someone dies with a funded revocable trust, the estate and the now-irrevocable trust each hold a distinct EIN and each file a Form 1041, so 2 returns run in parallel for the administration period. The estate side, including the executor as responsible party, is covered on EIN for an estate. A trust that runs an active business also compares to a sole proprietor EIN, and the free IRS route is set out on IRS EIN number.
Timing separates the 2 filings in practice. The estate covers assets that pass through probate under the executor's control. The trust covers assets already titled in its name before the death. Each files its own Form 1041 and issues its own Schedule K-1 to the same heirs. A beneficiary who later needs to confirm either 9-digit number follows how to verify an EIN.
This page states federal tax rules current as of August 2026. It is not legal or tax advice. Confirm your trust's position with a licensed CPA or attorney before filing.