Revocable vs. Irrevocable Trust: Which One Needs an EIN?

The rule underneath the labels

The words revocable and irrevocable describe who controls the trust. The question the IRS actually asks is whether the trust is a grantor trust: whether the person who created it still holds enough power over it that, for tax purposes, the trust and the person are the same thing.

A revocable trust is the clearest case. The grantor can amend it, revoke it, or take everything back tomorrow. Nothing has really left their hands, so the trust has no tax life of its own. Its income is the grantor’s income and its number is the grantor’s SSN.

An irrevocable trust is the opposite. The grantor has given the assets up. Someone else, the trustee, holds them for the beneficiaries. That is a separate taxpayer, and separate taxpayers have their own numbers and, usually, their own returns.

Revocable living trust while the grantor is alive

No EIN is required. Many people are told otherwise, usually by a bank retitling an account into the trust’s name. The bank wants a number for the account; the grantor’s SSN is the correct one. Applying for an EIN the trust does not need is not fatal, but it creates a number that then has to be explained on every return, and the trust still reports under the grantor.

One genuine reason a living grantor might get an EIN for a revocable trust is privacy: keeping the SSN off account paperwork held by third parties. That is a choice, not a requirement, and it does not change how the trust is taxed.

Irrevocable trust

Yes, an EIN. This covers trusts that were irrevocable from the day they were signed, such as many trusts created for children, for life insurance, or for asset protection, and it covers every revocable trust that has become irrevocable because the grantor died.

There is a subtlety. Some trusts are drafted to be irrevocable for estate purposes and yet still treated as grantor trusts for income tax purposes, because the grantor kept a specific power the tax code counts. Those trusts generally still get an EIN, and the trustee reports under it, but the income may still flow to the grantor. If your trust document was written by an estate planning attorney and contains language about grantor trust status, that is the situation, and the attorney or the return preparer should confirm how it reports.

The moment one becomes the other

The grantor’s death converts a revocable trust into an irrevocable one. On that date the trust stops being able to use the SSN, because the SSN belonged to a person who is no longer a taxpayer for future income. The successor trustee applies for the trust’s EIN, retitles the accounts, and files Form 1041 for income from that date forward. EIN for a trust after the grantor dies walks through it.

Incapacity is different. If the grantor is alive but unable to manage their affairs and a successor trustee steps in, the trust is usually still revocable and still a grantor trust. No new number is needed merely because someone else is signing.

The trust types the SS-4 asks about

When a trust does need an EIN, Form SS-4 wants to know which kind. The form’s own categories include revocable, irrevocable, guardianship, conservatorship, custodianship, escrow and bankruptcy estate, each handled differently afterwards. The answer decides how the trust is taxed, and the online application accepts whichever box you tick without checking it against the document. Getting it wrong produces a valid EIN for the wrong kind of taxpayer.

Quick answers

The bank says my revocable trust needs an EIN. Is the bank right?

Usually not, if you are the living grantor. The account can be opened in the trust’s name under your SSN. Some banks have internal policies that ask for an EIN anyway; if so, you can obtain one, but it does not change how the trust reports.

I am the trustee of my parents’ trust. They are alive. Do I need an EIN?

If they can still revoke or amend it, no. It is their grantor trust and uses their SSN. If it is irrevocable, yes.

Does a testamentary trust need an EIN?

Yes. A trust created by a will comes into existence at death and is irrevocable from the start. It is also separate from the estate that created it, so an executor who is also trustee may hold two numbers.

Does getting an EIN make the trust irrevocable?

No. The trust document decides that. The EIN is only a number the IRS uses to keep track of a taxpayer.