Trust Guide
EIN for an Irrevocable Trust: Required at Creation
An irrevocable trust always needs its own EIN. Unlike a revocable trust, it is a separate legal and tax entity from the moment it is created. The trustee applies on Form SS-4, and the trust files Form 1041 every year.
Last updated: August 30, 2026
An irrevocable trust always needs its own EIN, from the moment it is created. Unlike a revocable trust, an irrevocable trust is a separate legal and tax entity: the grantor has permanently given up control of the assets, so the income can no longer be reported on the grantor's Social Security Number. The trustee applies on Form SS-4 with Trust as the entity type, and the trust files Form 1041 each year. The IRS charges $0 for the EIN.
An irrevocable trust is one the grantor cannot amend, revoke, or unwind. That permanence is the whole point of the structure — it is what moves assets out of the grantor's estate and puts them beyond the reach of creditors — and it is also what makes the trust a taxpayer in its own right. Because no one retains the power to take the assets back, no individual's SSN can carry the reporting. The EIN for a trust guide covers every trust type; this page covers the irrevocable case, and EIN for a revocable trust covers the opposite rule.
| Factor | Detail |
|---|---|
| EIN required? | Yes, always |
| When to apply | At creation, before funding |
| Applicant | The trustee |
| Entity type on Form SS-4 | Trust |
| Reason for applying (Line 10) | Created a trust |
| Annual tax return | Form 1041 |
| Beneficiary reporting | Schedule K-1 |
| IRS fee | $0 |
The Rule
Why Does an Irrevocable Trust Always Need an EIN?
Because it is a separate taxpayer. The grantor has permanently transferred the assets and cannot get them back, so the IRS can no longer treat the income as the grantor's own. A separate taxpayer needs a separate identification number.
This is the mirror image of the revocable rule. A revocable trust reports under the grantor's SSN precisely because the grantor can revoke it — the assets are still functionally the grantor's. Remove that power and the logic reverses in full.
| Feature | Revocable Trust | Irrevocable Trust |
|---|---|---|
| EIN needed? | Only after the grantor dies | Yes, always |
| When to get the EIN | At the grantor's death | At creation |
| Tax ID while active | The grantor's SSN | The trust's own EIN |
| Annual tax return | None during the grantor's life | Form 1041 |
| Can the grantor change it? | Yes | No |
| Assets in the grantor's estate? | Yes | No |
| Asset protection | None | Yes |
If the person who created the trust can still amend or cancel it, the trust is revocable and the rules on EIN for a revocable trust apply instead.
How to Apply
How Does the Trustee Apply for the EIN?
The trustee completes Form SS-4, selects Trust as the entity type, and names themselves as the responsible party. Apply after the trust document is signed and before any assets are transferred in.
Sign the Trust Document First
Enter the Trust Name on Line 1
Name the Trustee on Lines 7a and 7b
Select Trust on Lines 9a and 10
Submit, Then Fund the Trust
Apply before funding, not after. Banks will not open an account in the trust's name without the EIN, and assets that arrive before the account exists create titling problems that are tedious to correct. The complete field-by-field walkthrough is in the Form SS-4 guide.
Filing
What Does an Irrevocable Trust File Each Year?
The trust files Form 1041 for every year it holds income-producing assets, and issues Schedule K-1 to each beneficiary who received a distribution. The EIN appears on both.
Trust income splits between the trust and its beneficiaries. Income the trust keeps is taxed to the trust. Income it distributes is deducted by the trust and taxed to the beneficiary who received it, reported on that beneficiary's Schedule K-1 and carried onto their personal return.
Trust tax brackets are compressed, so a trust reaches the top federal rate at a far lower income level than an individual does. That single fact drives most distribution planning, and it is the reason trustees work with a CPA rather than filing Form 1041 unassisted.
| Filing | Purpose | Who Receives It |
|---|---|---|
| Form 1041 | Annual trust income tax return | IRS |
| Schedule K-1 | Reports each beneficiary's share of distributed income | Each beneficiary |
| Final Form 1041 | Marked final when the trust terminates | IRS |
ein.so files Form SS-4 and does not provide tax advice. Confirm your trust's filing position with a US CPA who works with fiduciary returns.
After Approval
What Happens After the Trust EIN Is Issued?
The IRS sends a CP 575 confirmation letter with the trust's EIN. That letter is the document every bank and brokerage asks for, so store it with the trust instrument and treat it as a permanent record.
Four steps follow immediately:
- Open the trust bank account — in the trust's exact legal name, using the EIN and the CP 575 letter. See EIN for a bank account for what institutions require.
- Fund the trust — transfer and retitle the assets the trust was created to hold. An unfunded trust accomplishes nothing regardless of its tax ID.
- Give the EIN to every payer — banks, brokerages, and tenants issue Forms 1099 against the trust's EIN rather than any individual's SSN.
- Calendar the Form 1041 deadline — April 15 for a calendar-year trust, with a 5.5-month extension available on Form 7004.
If the CP 575 letter is ever lost, the IRS will not issue a duplicate. The trustee instead requests a Letter 147C, which serves the same verification purpose for banks. The EIN confirmation letter guide covers both documents and when each is accepted.
An EIN never expires and is never reassigned. When the trust distributes its final assets and terminates, the trustee files a Form 1041 marked final and the EIN simply goes dormant. There is no cancellation process and nothing further to file.
Common Types
Which Trusts Fall Under This Rule?
Any trust the grantor cannot revoke. The label on the document matters less than whether the power to unwind it was retained, and several common estate-planning structures are irrevocable by design.
- Irrevocable life insurance trust (ILIT) — holds a policy outside the taxable estate
- Charitable remainder trust — pays an income stream, with the remainder to charity
- Special needs trust — supports a beneficiary without disturbing benefit eligibility
- Medicaid asset protection trust — moves assets ahead of a long-term-care lookback
- Spendthrift trust — shields a beneficiary's interest from creditors
- A revocable trust after the grantor dies — becomes irrevocable at that moment
That last one is the case people meet most often. A living trust converts to an irrevocable trust on the grantor's death, and the successor trustee then has to obtain an EIN. The timeline for that transition is set out in EIN for a revocable trust. Where an estate is being administered at the same time, it is a separate taxpayer with its own number — see EIN for an estate.
Need an EIN for a trust? ein.so prepares Form SS-4, faxes it to the IRS, and delivers the EIN by email — $49 Standard (4-7 business days) or $97 Express (2-3 business days), no SSN required. Start your application.
Related guides: EIN for a trust | EIN for a revocable trust | EIN for an estate | Form SS-4 guide | Who needs an EIN?.
Frequently Asked Questions
Does an irrevocable trust need an EIN?
Yes, always. An irrevocable trust is a separate legal and tax entity from the moment it is created, so it cannot report under anyone's SSN. The trustee applies on Form SS-4 with Trust as the entity type. The IRS charges $0 for the number.
Who applies for an irrevocable trust's EIN?
The trustee. On Form SS-4 the trustee is the responsible party on Line 7a, and that person's SSN or ITIN goes on Line 7b. The grantor does not apply, because the grantor has given up control of the assets by making the trust irrevocable.
What tax return does an irrevocable trust file?
Form 1041, the US Income Tax Return for Estates and Trusts, every year the trust holds income-producing assets. The trust issues Schedule K-1 to each beneficiary who received a distribution, and those beneficiaries report the income on their own returns.
When should the trustee apply for the EIN?
As soon as the trust is signed and before it is funded. Banks and brokerages will not open an account in the trust's name without the EIN, so applying first prevents a gap where assets have nowhere compliant to sit.
What entity type do I select on Form SS-4 for an irrevocable trust?
Select Trust on Line 9a and enter the type of trust in the space provided. On Line 10, select 'Created a trust' as the reason for applying. Enter the date the trust was signed as the date the business started or the trust was funded.
Does an irrevocable trust EIN ever expire?
No. EINs never expire and are never reissued to another taxpayer. When the trust terminates and distributes its final assets, the trustee files a final Form 1041 marked as final. The EIN simply goes inactive; there is nothing to cancel.
Does a grantor-type irrevocable trust still need an EIN?
Some irrevocable trusts are still treated as grantor trusts for income tax purposes, which changes how income is reported but not the entity's status. Trustees of these trusts commonly still obtain an EIN for banking. Confirm the reporting method with a US CPA before filing.
Can a non-US resident trustee get an EIN for a trust?
Yes. A trustee without an SSN or ITIN files Form SS-4 by fax to 855-215-1627, writes 'Foreign' or 'N/A' on Line 7b, and attaches a passport copy. The IRS online tool requires an SSN, so the fax method is the route. ein.so files it for $49 Standard or $97 Express.
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