Lost Your EIN? A UK Founder's Guide to Retrieve My EIN Number
- Read & Associates
- Feb 24
- 12 min read
Losing your Employer Identification Number (EIN) can feel like a proper nightmare, especially when you're a UK founder trying to manage a US business from across the pond. This nine-digit number is the master key to your American operations. Misplace it, and you'll find critical progress grinds to a halt.
Think of it as your company's official identifier—without it, you're essentially locked out of the US financial system.
Why Your EIN Is the Key to Your US Business
For a UK founder, an EIN is far more than just a tax ID number; it’s your operational passport to the United States. Without it, some of the most basic business activities are simply impossible. You need it to open a US bank account, hire employees, and get set up with essential payment processors like Stripe or Shopify Payments.
I've seen it happen time and again: a founder is pumped to launch their e-commerce store to US customers, but their Stripe application gets rejected flat out. The reason? A missing or incorrect EIN. Suddenly, the entire launch timeline is up in the air, and potential revenue is stuck on hold. This number truly is the bedrock of your business's legal and financial identity in the States.
The Foundation of Your US Operations
The absolute necessity of this number is reflected in the explosion of American entrepreneurship. In January 2024 alone, a staggering 532,319 U.S. business applications were filed, a 7.2% jump from the previous month. As the Census Bureau's Business Formation Statistics show, these applications are directly linked to IRS Form SS-4 filings for EINs, proving just how many new ventures depend on this single identifier to get off the ground.
At its core, your EIN unlocks several critical functions:
Banking and Finance: It’s the first thing a US bank will demand when you try to open a business account.
Hiring and Payroll: You cannot legally hire US employees or run payroll without an active EIN.
Tax Compliance: All federal tax filings, from income to employment taxes, are tied directly to this number.
Vendor and Partner Relationships: Many B2B services and platforms require an EIN just to set up an account.
Your EIN isn't just for the IRS. It's the central piece of information that legitimises your business in the eyes of banks, payment processors, and other government agencies. Losing it creates an immediate and frustrating administrative bottleneck.
Navigating the System as a Non-Resident
For non-resident founders, the EIN's importance is magnified. You're navigating a complex system from thousands of miles away, and this number is your primary tool for doing so. It’s what allows you to build a US financial footprint without being physically present.
Misplacing it means you have to figure out how to retrieve my ein number before you can take your next step.
Understanding its role is the first step toward appreciating why recovering it quickly is so critical. You can learn more about the specifics of what an EIN is and why it's vital for UK founders in our detailed guide.
Where to Look First: Finding Your EIN in Your Own Files
Before you even think about bracing yourself for an international call to the IRS, it’s well worth taking a deep breath and having a thorough rummage through your own records. More often than not, that "lost" EIN is hiding in plain sight, tucked away in a document you’ve probably seen a dozen times. A good search can save you hours of hold music.
The most obvious place to start is with the original confirmation letter the IRS sent you when the number was first issued. This official notice is called a Form CP 575. It’s a simple, one-page document with your business name, address, and that crucial nine-digit EIN right there on it. If you used a service like Set Up Stateside to form your company, this letter was a core part of the document package we delivered to you.
Digging Deeper into Your Business Documents
Can't find the CP 575? Don't panic. That’s pretty common, especially after a few years. The good news is your EIN gets copied onto countless other official documents as soon as you start operating.
The next best place to look is any US federal tax return you've ever filed. For corporations, your EIN will be sitting in the top right-hand corner of your Form 1120. For partnerships, it's in the same spot on Form 1065.
If tax returns are a no-go, widen your search to other essential business paperwork. I've seen countless founders find their EIN by checking:
Business Bank Account Statements: Banks almost always include your business EIN on monthly statements. It's often in the account details section of your online banking portal, too.
Old Loan Applications: Did you apply for a business loan, a line of credit, or even a corporate credit card? Your EIN would have been a mandatory field on that application.
Business Licenses and Permits: Any state, county, or city permits you've secured for your US operations will likely have your federal EIN on file.
Third-Party Correspondence: Think about letters from payroll providers or other government agencies. They often reference your EIN for identification.
Your EIN is like a fingerprint for your US company—it's on almost everything. Think back to any official financial transaction you've made in the US. Opening that bank account, applying for that permit, filing that first tax return... the number is almost certainly on the paperwork.
Taking 20 minutes to do this initial search is your fastest route to a solution. Finding the number yourself means you can get straight back to business without the headache of navigating the IRS phone system from the UK.
But if you’ve searched high and low and still come up empty-handed, it’s time to move on to the next step: calling the IRS directly.
Calling the IRS to Retrieve Your EIN
So, you've turned your office upside down, scoured every digital folder, and your EIN is still nowhere to be found. Don't panic. The next logical step is to go straight to the source: the Internal Revenue Service (IRS).
For founders based in the UK, this does mean making an international call, but a little preparation can make this a surprisingly quick and painless experience.
The line you need is the IRS Business & Specialty Tax Line. From the UK, you can reach them directly at +1 267-941-1099. Just keep in mind that this isn't a toll-free number, so your standard international call rates will apply.
Best Times to Call from the UK
Anyone who has dealt with the IRS knows that hold times can be brutal. The secret to avoiding a long wait is all in the timing. Their operating hours are 7:00 AM to 7:00 PM Eastern Time (ET).
Luckily for those in the UK, this time difference actually works to our advantage. The sweet spot for calling is early in their day, between 7:00 AM and 9:00 AM ET. That translates to 12:00 PM to 2:00 PM UK time (during standard time). Calling as soon as they open often gets you through to an agent much faster.
Before you pick up the phone, though, it's always worth one last check of your own records.
As you can see, the quickest path to finding your EIN is often buried in your own paperwork. Give those documents a final look before committing to an international call.
What to Have Ready Before You Dial
Do not even think about dialling that number until you have all your business information organised and in front of you. An IRS agent is strictly prohibited from giving out an EIN without first verifying your identity and your authority to receive it. It's a crucial security step to protect your company from fraud.
Key Insight: The IRS agent’s job is to safeguard your business information. They will be professional but firm. To get past their security questions, you must provide the exact details as they were listed on your original EIN application, Form SS-4.
Have this information ready before you call the IRS Business & Specialty Tax Line to ensure a smooth and successful conversation.
IRS Call Checklist for EIN Retrieval
Information to Prepare | Why It's Essential for Verification |
|---|---|
Full Legal Business Name | Must match the name on the original SS-4 application exactly. |
Primary Business Address | The mailing address the IRS has on file, not necessarily your current one. |
Business Entity Type | Be specific: "C Corporation," "Limited Liability Company (LLC)," etc. |
Your Full Name & Title | You must be a "responsible party" or officer (e.g., Director, Managing Member). |
Date of Business Formation | The agent may ask for this or other details from your application. |
The agent will use this information to pull up your file and will likely ask a few verification questions. They might ask you to confirm the name of the director listed as the responsible party or the state where the company was incorporated.
Once you’ve successfully answered their questions, the agent will provide your EIN over the phone. Write it down immediately and repeat it back to them slowly to confirm every digit is correct. This small step can save you a huge headache later.
Getting Official Proof of Your EIN
So, you've managed to get your EIN over the phone. That's a huge win! But before you pop the champagne, there's one more crucial step. Just having the number isn't always enough.
Most institutions, especially US banks, lenders, and major payment processors like Stripe, won't just take your word for it. They need to see an official document from the IRS to prove the number is yours. Without that paperwork, you can hit a frustrating roadblock just when you're trying to get your US operations off the ground.
Ask for Your EIN Verification Letter (Form 147C)
The best piece of evidence you can get is the EIN Verification Letter, which the IRS calls Form 147C. Think of it as the official replacement for the original CP 575 notice you got when the EIN was first issued.
Here’s the best part: you can ask for it on the very same call you used to find your number. Don't hang up yet!
Simply tell the IRS agent, "I also need an official verification letter for my records. Can you send me a 147C letter?" It's that straightforward. The agent will then ask for your preferred delivery method.
You have two main choices:
Fax: This is by far the fastest option. If you have a fax machine or use an online service, you could have the letter in your hands within hours, sometimes even minutes.
Mail: They can also post a hard copy to the business address they have on file. For those of us in the UK, be ready for a bit of a wait. International mail can easily take a few weeks to arrive.
Expert Tip: Always double-check the delivery details with the agent before ending the call. Confirm the exact fax number or mailing address. A simple mistake here could send your letter into the void, forcing you to start this whole process again.
Taking this one extra step turns a verbal confirmation into a powerful, tangible asset for your business. For a more detailed breakdown, we've put together a complete guide on how to get an EIN Verification Letter in the UK.
Can I Use a Tax Transcript Instead?
What if you're in a pinch and can't wait for the mail? Some people suggest using an IRS tax transcript as an alternative proof of your EIN. A transcript is an official summary of your business's tax account, and it will list your company name and EIN.
The catch? Getting a transcript usually means you need an online account with the IRS. For most non-resident founders without a US Social Security Number (SSN) or an Individual Taxpayer Identification Number (ITIN), setting one up is nearly impossible.
For this reason, sticking to the Form 147C request is almost always the most reliable and direct route for UK entrepreneurs. It's the key piece of paper you need to operate smoothly in the US.
Letting a Professional Handle the IRS for You
As a UK founder, your most valuable asset is time. I've seen it time and again—hours get eaten up by international calls, trying to line up with US business hours, only to be stuck listening to the IRS hold music. It’s more than just frustrating; it’s a real cost to your business.
Instead of getting tangled in that administrative web, you can authorize a trusted professional to retrieve your EIN for you.
For non-resident founders, this is a lifesaver. Handing this task off to an accountant, a US formation service, or a credentialed tax professional means you can sidestep the entire ordeal. These experts speak to the IRS all the time. They know the system inside and out, what to ask, and how to get things done quickly.
How the Authorization Process Works
You can't just have anyone call the IRS on your behalf. You need to give them official permission by filing a specific form. The two you’ll most likely encounter are Form 8821 and Form 2848.
Form 8821 (Tax Information Authorization): This is the straightforward choice for this job. It gives your designated professional the green light to receive and look at your confidential tax information, which includes finding your EIN. It doesn't let them represent you in more complex situations.
Form 2848 (Power of Attorney and Declaration of Representative): This one is the heavy hitter. It grants your representative the power to not only get information but also to act for you—like responding to IRS notices or signing agreements. For a simple task like finding a lost EIN, this is usually overkill.
For the sole purpose of having someone retrieve my EIN number, a Form 8821 is almost always the right tool. If you're curious about how this fits into the bigger picture, our guide on a US LLC formation service for UK founders explains how we can handle these hurdles for you.
The Practical Benefits for UK Founders
Misplacing your EIN can bring critical business operations to a grinding halt. You need it for everything from opening a US bank account to filing taxes.
The good news is there's a huge network of professionals ready to help. As of 2026, there are over 807,651 credentialed tax preparers in the US, including 195,175 CPAs and 65,257 enrolled agents. You have plenty of options. You can find more stats about the scope of tax professionals on the IRS website.
Letting an expert handle this isn't just about convenience; it’s a strategic business decision. It frees you up to focus on what you do best—growing your company—while a specialist handles the red tape and gets it done right.
The process is fairly simple. You sign the authorization form, your representative faxes it to the right IRS department, and then they make the call. They'll navigate the verification questions and get the EIN for you, often requesting the official 147C Verification Letter at the same time. This simple act of delegation lets you run your business, knowing a critical piece of your US operations is in capable hands.
Common Questions About Finding Your EIN
Even with a clear plan, tracking down a lost EIN from the UK can throw a few curveballs your way. Let's tackle some of the most common questions we hear from founders so you can get past these final hurdles.
How Long Does It Take to Retrieve an EIN by Phone?
The good news? Once you actually get an IRS agent on the line, the process is quick. Assuming you have all your details handy, they can usually verify your identity and give you the EIN in about 10-15 minutes.
The bad news, and the biggest variable by far, is the wait time. You could be on hold for a few minutes or, during peak US tax season, well over an hour.
A pro tip for UK founders: try calling early in the US morning. That’s your afternoon, and it’s often your best shot at a shorter queue.
What if I Cannot Answer the Verification Questions?
The IRS is incredibly strict about protecting your company's information, and for good reason. The agent must confirm you're an authorized person—like the responsible party or a company officer—before they'll give out an EIN.
If you can't provide the exact business name, the address they have on file, or the entity type from the original application, they will shut the conversation down. They simply cannot and will not help you.
In this situation, you’re left with two paths: either find the old documents with the correct information or authorize someone who does have it—like your accountant or a formation service like us—to call on your behalf.
Can I Retrieve My EIN Number Online?
Unfortunately, no. For security reasons, the IRS does not have any online tool, portal, or database to look up a lost EIN. The online system is only for applying for a new number.
Whatever you do, don't try to solve this by applying for a new EIN. That’s a recipe for disaster. Having two EINs for one business creates serious tax and reporting headaches down the road that are a nightmare to unravel. Your only official routes are checking your documents or calling the IRS Business & Specialty Tax Line.
What if Someone Else Applied for the EIN?
This happens all the time, especially if you used a service or had a partner handle the initial paperwork. You can absolutely still call the IRS yourself, but only if you are officially listed as a "responsible party" or an officer of the company in their records.
For an LLC, that’s usually a managing member. For a corporation, it could be a director or the president. The agent will ask questions to confirm your identity and role. If your name isn't on that original SS-4 application, you’ll hit a wall, which is a great reminder of why it's so important to keep your official business records with the IRS up to date.
Dealing with the IRS from across the pond can be a major time sink. At Set Up Stateside, our team can take the entire EIN retrieval process off your plate, saving you hours of hold music and letting you get back to what matters—growing your business. Learn how we can support your US journey at https://www.setupstateside.com.
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