Estate EIN: When and Why an Estate or Trust Needs a New Tax ID Number
A decedent’s estate generally needs its own employer identification number when it becomes a separate tax-filing entity. A trust may also need a new EIN when its tax status changes after death.
What Matters Most
Do not continue using the decedent’s Social Security number for estate accounts that belong to a separate post-death entity.
An Estate Is a New Taxpayer
After death, the decedent’s estate is generally a separate tax entity. Bank and brokerage accounts opened for the estate should use the estate’s EIN rather than continue the decedent’s Social Security number.
Trust EIN Rules Depend on Status
A revocable grantor trust may have used the grantor’s Social Security number during life, but its identification and reporting can change after death. The post-death trust structure should be reviewed before opening accounts or filing returns.
Why Professional Help Can Matter
Fiduciary taxation often depends on the governing document, ownership, timing, distributions, elections, fiduciary accounting, and state law. A qualified tax professional with actual estate-and-trust experience can help coordinate those moving pieces so requirements are fulfilled and unintended consequences are less likely.
Not Sure What Your Situation Requires?
Reviewed by Owen Arnoff, EA, NTPI Fellow
Reviewed: October 2026
Technical tax content is intended for general education. Tax law and procedures can change, and individual facts matter. See our Editorial Standards.