Unfortunately, looking up your EIN on IRS.gov isn't an option, as there's no EIN lookup tool. Still, that doesn't mean you're entirely out of luck. You can find it on the official IRS notice you received when it was issued, call the IRS directly or locate your EIN on business documents.

This is the document the IRS sent you when you applied for your unique employer identification number. There are additional free options if you've misplaced that notice, including calling the IRS. One thing the IRS doesn't offer: a public EIN lookup tool online.

There are a couple of places that EIN verification lookup tools can draw information from. The most authoritative places are government websites, such as state Secretary of State portals, the SEC's EDGAR system (for companies listed on public stock exchanges), or the IRS itself (for charities and nonprofits).

EIN. An Employer Identification Number (EIN) is also known as a federal tax identification number, and is used to identify a business entity. It is also used by estates and trusts which have income which is required to be reported on Form 1041, U.S. Income Tax Return for Estates and Trusts.