How To Find Your Employer Identification Number

So, you’ve started a business, or maybe you’re just trying to hire a nanny without the IRS showing up at your door. Suddenly, you’re being asked for an “Employer Identification Number,” or EIN, like it’s some kind of secret handshake. It’s a nine-digit ID that the government uses to track your money, and you need it—but where the heck did you put it?

First, let’s get one thing straight: your EIN isn’t your Social Security number, though they’re both nine digits long and equally important. The IRS calls it a “tax ID,” but think of it as the bouncer at the club of finance. Without it, you can’t open a business bank account, file taxes, or even apply for a loan to buy that ergonomic office chair you’ve been eyeing.

The Obvious Places (That You Definitely Checked)

Start by looking at your original IRS confirmation letter. You know, the one they sent when you first applied for the EIN? It’s probably buried in the same drawer as that expired passport and the manual for a toaster you donated in 2017. If you applied online, the IRS gave you a downloadable PDF instantly. Print that thing twice—once for the file, and once to tape inside your wallet for emergencies.

Did you form an LLC or corporation through a state filing service? Check your formation documents. These papers usually list your EIN in bold, right next to the phrase “Don’t Lose This.” Also, peek at your business tax returns for the past three years—that number appears at the top of every single one, mocking you for not remembering it.

What If the Dog Ate It? (A Legitimate Concern)

If you’ve exhausted the paper trail, don’t panic. Call the IRS Business & Specialty Tax Line at 1-800-829-4933. But here’s the catch: you have to prove you are who you say you are. They’ll ask for your business name, address, and other info that makes you feel like you’re applying for a secret agent license. The hold music is surprisingly catchy—I once sang along to it for twelve minutes before a human answered.

Another backdoor: check your bank records. Every time you deposited a check from a client, your EIN was on the deposit slip. Call your bank’s business support line and ask them to pull it up. Just be prepared for them to ask, “Is this you, or are you a hacker?” You’ll also find it on any W-9 forms you’ve filled out for freelancers or contractors. “Oh, that’s where I left it!” is a common yelp at this stage.

The Lazy Person’s Guide (No Judgment)

If you’re the type who hates phone calls (same), log into your IRS online account at irs.gov. You’ll need a verified ID.me account, which is a pain to set up but feels like unlocking a secret level in a video game. Once inside, your EIN should be listed under “Business Tax Accounts.” If it’s not there—and it sometimes isn’t—you can request a duplicate EIN notice via fax. Yes, fax. The IRS loves fax machines like a grandparent loves a landline. It’s 2025, but okay.

How to verify EIN number online (Employer Identification Number)

Fun fact: you can also ask a third-party payroll service like ADP or Gusto to look it up for you. They already have it on file if you’ve ever paid an employee. Just don’t be surprised if they make you jump through hoops—security is their entire personality. “For the protection of your financial soul,” they’ll say, and you’ll say, “Fine, just gimme the number.”

When All Else Fails (The Nuclear Option)

If you’ve literally lost everything—your home, your phone, your memory—you can write a formal letter to the IRS requesting a copy of your EIN. Include your business name, your legal name, and a prayer. Mail it to the appropriate IRS address for your state; expect a reply in six to eight weeks. That’s not a typo—the IRS moves slower than a sloth on a treadmill.

But here’s a weird trick: look at your business credit reports. Companies like Dun & Bradstreet or Experian often list your EIN on their free summaries. It’s like your business’s social media profile, but with less cat memes and more financial anxiety. Also, check any state-level licenses for your business—many state agencies require your EIN on the application.

The Surprising Reason You Need This Number (It’s Not Just Taxes)

Did you know your EIN is public record in many cases? The IRS doesn’t hide it like a secret recipe; it’s on business filings, loan documents, and even some online databases. So if you’re panicking, remember: you can ask a friend or accountant to search public records. Just don’t ask a stranger on Twitter—that’s how identity theft happens, and you don’t need that drama.

Finally, once you find it, store it in three places: a locked file cabinet, a password manager like 1Password, and taped to the back of your phone case (but please, cover it with a sticker). Because the next time you need your EIN, you won’t remember where you put it. You’ll be back here, reading this article, laughing at how your future self didn’t learn the lesson. I’ve been there. We’ve all been there. And now, go forth and conquer your paperwork.