• September 26, 2025

How Do I Find an EIN Number? Complete Guide for New or Lost Employer ID

Okay, let's talk EINs. That Employer Identification Number thing? If you're scrambling to figure out how do I find an EIN number, you're definitely not alone. I remember helping my cousin Sarah last year – she nearly tore her hair out trying to open a business bank account without it. The struggle is real, and honestly? The IRS isn't always the easiest to deal with.

Think of an EIN like a social security number for your business. It's a unique nine-digit code (format: XX-XXXXXXX) the IRS uses to track your business taxes. No two businesses have the same one. If you're asking "how do I find an EIN number", it usually means one of two things: you need to *get* a new one for your startup, or you've *lost* the one you already had. We'll tackle both scenarios head-on.

Who Actually Needs One of These EIN Things Anyway?

Not every solo freelancer needs one, despite what some folks online might scream. Here’s the breakdown straight from my experience and IRS guidelines:

Business TypeEIN Required?Why You'll Need It
LLC (Single Member)Usually No (but often recommended)Opening a business bank account is the main reason people get one
LLC (Multi-Member)Absolutely YesMandatory for tax filings as a partnership
Sole ProprietorNo (But super useful)Hiring employees? Opening biz banking? Then you need it
S-Corp or C-CorpMandatoryNon-negotiable requirement from the IRS
Non-Profit OrganizationMandatoryRequired even before you apply for tax-exempt status
Estate or TrustMandatoryNeeded for managing assets and filing returns

See the pattern? If you have employees, operate as a corporation or partnership, or even just want that separation between personal and business finances (highly recommended!), you need an EIN. If you're just freelancing under your own name and not hiring anyone? You *can* technically use your SSN though I personally hate that idea for privacy reasons.

The Meat and Potatoes: How Do I Find My EIN Number?

Alright, let's get practical. How do you actually find this elusive number? The path depends entirely on your situation. Are you trying to get a *new* EIN because you’re starting fresh? Or did you misplace the one you already had? Let's break it down.

Scenario 1: Getting a Brand New EIN (The First-Time Hunt)

This is the most common reason people ask "how do I find an EIN number". They really mean "how do I get one". You have a few routes, with wildly different waiting times:

Method 1: Online Application (The Instant Winner)

This is the IRS's preferred method and frankly, the easiest if you qualify. Head to the IRS EIN Assistant website. The catch? Your principal business location and the responsible party's legal address must be in the US. The process takes about 15 minutes if you have your info ready.

What happens? You answer questions online, and boom usually – you get your EIN immediately at the end. You can download the confirmation letter (IRS Form CP-575) as a PDF right then and there. Seriously, this is the golden ticket if you're eligible. Print that PDF immediately and save it in three different places!

Method 2: Phone Application (For International Applicants)

Not based in the US? This is your primary option. Call the IRS Business & Specialty Tax Line at (267) 941-1099 (not toll-free). Hours are 6:00 AM to 11:00 PM Eastern Time, Monday through Friday. Have your Form SS-4 details ready. The agent will ask you questions and issue your EIN over the phone. They *will* mail the CP-575 to the address you provide, which takes 4-6 weeks. Write down the number immediately!

Method 3: Fax Application (The Forgotten Middle Child)

Fax your completed Form SS-4 to the IRS at (855) 641-6935. Make sure your fax includes a return fax number! If everything's in order, they'll fax your EIN back typically within 4 business days. Keep an eye on that fax machine!

Method 4: Mail Application (The Slow Boat)

Mail your Form SS-4 to the IRS address listed in the form's instructions. Be prepared to wait. We're talking 4 to 6 weeks minimum. I once had a client who waited 9 weeks during tax season. Avoid this unless you have absolutely no other choice.

Quick Tip: Whichever method you use to *get* your new EIN, record it IMMEDIATELY in a secure password manager and tell a trusted partner or advisor. Don't rely on memory. Sarah learned that the hard way – lost hers within a week of getting it!

Scenario 2: Finding a Lost or Misplaced EIN (The Treasure Hunt)

So you *had* an EIN but now it's playing hide-and-seek? Finding a lost EIN is trickier than getting a new one, but it's possible. Here's how to track down that missing number:

1. Dig Through Your Own Files (The Obvious First Step)

Check everywhere physically and digitally:

  • Old tax returns (especially Form 1120, 1120-S, 1065, 1040 Schedule C or SE)
  • Business bank account statements or the original account opening documents
  • Business licenses or permits filed with your city or county
  • Loan applications (business loans always require it)
  • Previous IRS correspondence (look for CP-575 or any notices)
  • Payroll service documents (if you had employees)

I can't tell you how many times clients found it stuck in a drawer with old receipts!

2. Call the IRS Business & Specialty Tax Line

Ring them up at 800-829-4933. Hours are 7:00 AM to 7:00 PM local time, Monday through Friday. Be ready to prove you're the authorized person:

  • Your personal SSN or ITIN
  • Legal business name and address (exactly as registered)
  • Type of business entity (LLC, Corp, etc.)
  • Approximate date the EIN was issued

If you can verify ownership, they'll give you the number over the phone. Takes about 10-15 minutes once you get through. Warning: Hold times can be brutal like, bring-a-snack brutal.

3. Request Your EIN via Form 4506-T

Fill out IRS Form 4506-T ("Request for Transcript of Tax Return"). Check box 8 for "EIN Application Account Transcript". Mail or fax it in. This doesn't give you the EIN directly but provides a transcript showing it alongside your identifying info. Takes about 10 business days after they receive it.

4. Ask Your Bank

If you opened a business bank account with that EIN, the bank has it on file. Call their business banking department. They’ll need to verify your identity thoroughly before disclosing it.

Important Warning: Be VERY careful searching "how do I find an EIN number" online. Third-party sites promising "instant EIN lookup" for a fee are almost always scams. They either charge you for free IRS services or worse, steal your identity. Only trust official IRS channels (*.gov websites).

After You Have That Precious Number: Next Steps

Got your EIN? Awesome! But don't just file it away. There are crucial next steps:

  • State Registration: Most states require you to register your EIN for state taxes (income, sales, payroll). Check your state's Department of Revenue website. Don't assume federal registration covers state!
  • Business Banking: Finally open that dedicated business account. Give the bank your EIN confirmation (CP-575).
  • Hiring Employees: Use your EIN to register for state unemployment taxes and file Form I-9 and W-4s.
  • Business Licenses/Permits: Renew or apply for local licenses using your EIN.
  • Keep it Safe & Accessible: Store the CP-575 digitally (encrypted) and physically. Tell your accountant/bookkeeper.

Honestly, the number of times I've seen businesses stall because they forgot to do the state step is ridiculous. Don't be that person.

Common "How Do I Find an EIN Number" Questions Answered

Let's tackle the specific worries popping up in searches:

Is finding my Employer Identification Number free?

Absolutely yes. Getting a new EIN directly from the IRS is free. Retrieving a lost EIN via IRS phone line or transcripts is also free. Any website charging you money for this basic IRS service is ripping you off. Run away!

How do I find my EIN number online instantly?

For a new EIN: Yes, instantly online via the IRS EIN Assistant *if* you qualify (US-based responsible party). For a lost EIN: No magic online lookup exists. You must call the IRS (800-829-4933) or request a transcript (Form 4506-T). Searching "lost EIN lookup" online usually leads to scam sites.

Can I find my EIN number by business name?

Not reliably through the IRS. The IRS doesn't offer a public EIN database searchable by business name. Some third-party *paid* business databases (like Dun & Bradstreet) might list it if the business reported it, but it's not guaranteed or free. Your best bet is still contacting the IRS directly if you are the owner.

How do I get an EIN without a Social Security Number (SSN)?

If you're an international applicant or a non-resident alien starting a US business, you must apply by phone. Call the IRS at (267) 941-1099. You'll need an Individual Taxpayer Identification Number (ITIN) or foreign passport number. They'll assign the EIN over the phone and mail the confirmation.

I found multiple EINs associated with my business! What now?

This happens more often than you'd think, usually if someone accidentally applied twice. Don't panic. Call the IRS Business & Specialty Tax Line (800-829-4933). Explain the situation. They can determine which EIN is active and officially close the duplicate. Using the wrong one can cause filing nightmares later.

How do I find my EIN number for a closed business?

The process is the same as finding a lost EIN for an active business. Dig through old tax returns or bank documents first. If that fails, call the IRS (800-829-4933). You'll still need to prove you were the authorized representative for that closed entity.

Potential Hang-Ups and How to Dodge Them

Even knowing how do I find an EIN number, things can go sideways. Here's what trips people up:

ProblemWhy It HappensHow to Fix It
Online Application RejectedMismatched info, browser glitch, entity type mismatchDouble-check all entries match legal docs. Try a different browser. Call IRS if stuck.
IRS Says No RecordPossible duplicate application error, wrong legal name usedVerify the exact legal name used when applying. Request EIN search via Form 4506-T.
Hours on HoldHigh call volumes, especially Jan-April & Oct-DecCall right at 7:00 AM local time. Use the callback option if offered.
Fax Not ReturnedBusy IRS fax lines, wrong number, transmission errorResend after 5 business days. Triple-check fax number. Confirm transmission report.
State Rejects EINIRS issued it but state hasn't processed registrationConfirm state registration is complete. Provide IRS CP-575 to state.

Look, dealing with government paperwork is rarely fun. Patience and meticulous record-keeping are your best friends here. Keep copies of everything you submit and every confirmation you receive. Save IRS phone call notes with dates and agent IDs yes, really.

Final Reality Check: Things Nobody Tells You

Before you dive in, here's some real talk based on my years dealing with this:

  • The IRS Website Can Be Glitchy: Especially during peak filing seasons. If the EIN Assistant bombs out, try again later or resort to fax/phone. Don't assume it's you.
  • Responsible Party is Key: Who is the "responsible party"? Usually the owner or primary controlling person. Their SSN/ITIN and legal name must be perfect. Mess this up, and your application gets rejected.
  • Banks Need the Paper: Even after you get the number online, banks almost always demand the physical CP-575 letter or the official PDF download for account opening. Getting the number is step one; proving it officially is step two.
  • Scammers Are Lurking: Seriously, be paranoid. Only use irs.gov websites for EIN services. Emails claiming to be "IRS EIN Services" are phishing scams 99.9% of the time. The IRS doesn't initiate contact via email.
  • It Might Not Be Instant (Even Online): Occasionally, the online system flags applications for review. If you don't get your EIN instantly online, you'll get a reference number to check status later. Don't panic; it sometimes takes 1-2 business days.

Figuring out how do I find an EIN number boils down to knowing your starting point (new vs. lost) and using the *official* IRS methods. Avoid the shortcuts offered by sketchy websites. Yes, the IRS phone hold music is awful. Yes, digging through old files is a chore. But getting it right saves massive headaches down the road when filing taxes, hiring your first employee, or securing a loan. Trust me, it's worth doing properly.

Got a weird EIN situation I didn't cover? Shoot me an email – I've probably seen it before. Good luck!

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