How to Get Your EIN for LLC: Quick Application Steps

An EIN for an LLC is a unique, nine-digit number that the IRS gives your business. The easiest way to think about it is as a Social Security Number, but for your company. Once you’ve officially formed your US LLC, getting an EIN is the absolute first thing you need to do. It’s what you’ll need to open a business bank account, hire people, and file your federal taxes.

Why Your US LLC Absolutely Needs an EIN

Think of your Employer Identification Number (EIN) as your business’s passport into the American market. It’s the one-of-a-kind identifier that makes your LLC real in the eyes of the IRS, US banks, and other businesses. Without it, your company is basically a ghost—it exists on paper but can't actually do anything.

This isn't just some administrative hoop to jump through. It's the key that unlocks your company's ability to operate. After all the work of legally forming your LLC in a specific state, securing your EIN is the immediate, non-negotiable next move.

The Foundation of Your US Operations

For founders outside the US, especially those of us in the UK, the EIN is the single most important document you’ll get after your LLC is approved. It’s what creates a clear line between you personally and your business, which is crucial for both legal protection and keeping your finances clean.

The EIN is the gateway to US commerce. It allows you to move from a company that exists only on paper to a fully functional business that can accept money, pay bills, and grow.

Just imagine trying to run your business without one. A US bank simply won't open a business account for an LLC that doesn't have an EIN. That roadblock alone can stop your new venture dead in its tracks, making it impossible to manage revenue or pay for services in a professional way.

Unlocking Essential Business Functions

Getting an EIN for your LLC isn't just about staying compliant; it's about setting your business up for growth. Here’s a quick look at the doors it immediately opens:

• Open a US Business Bank Account: Pretty much every US bank will ask for an EIN to open an LLC account. This is a must-do for keeping your business and personal money separate.

• Hire Employees: If you plan on building a team in the US, an EIN is required for handling payroll and filing employment taxes.

• File Federal Tax Returns: The IRS uses your EIN to identify your LLC for all federal tax matters.

• Build Business Credit: Your EIN lets you establish a credit profile for your company that's separate from your personal credit history. This is vital for getting loans or credit lines down the road.

• Look Professional: Putting your EIN on contracts, invoices, and applications shows partners and clients that you're a serious, properly structured business.

The sheer volume of new EINs shows how standard this is. The IRS issued over 27 million new EINs back in 2022, and LLCs accounted for a massive 72% of all new business applications. This boom, driven partly by international founders like you, proves that getting an EIN is just what you do when you’re serious about the US market. You can see more on this trend and why so many foreign entities are forming in this insightful video on EIN trends.

Core Functions of an EIN for a UK-Owned US LLC

I've put together a simple table that breaks down exactly what an EIN does for a UK founder. It really highlights how this one number enables all the critical first steps of running your US company.

Activity	Why an EIN is Required	Impact for UK Founders
US Banking	Banks use the EIN to verify the business entity and open a compliant business account.	Enables you to accept USD payments and manage finances without currency conversion fees.
Hiring & Payroll	The EIN is needed for withholding, reporting, and paying federal payroll taxes for employees.	A prerequisite for building a US-based team. Learn more in our founder's guide to hiring in the US.
Tax Compliance	The IRS tracks all business tax obligations and filings through the assigned EIN.	Ensures your LLC remains in good standing and avoids penalties with the IRS.
Client Contracts	Many US clients require a Form W-9, which includes your EIN, before they can pay you.	Prevents payment delays and establishes your LLC as a professional vendor.

Simply put, you can't afford to put off your EIN application. Waiting can cause operational headaches and lead to missed opportunities, stopping your US venture from ever getting off the ground. Getting this number is the first real move you'll make as a US business owner.

Get Your Ducks in a Row: What You Need Before Applying for an EIN

Want to avoid a quick rejection from the IRS? It all comes down to a bit of prep work. Rushing into the EIN application is one of the most common mistakes I see, and it almost always leads to frustrating delays. Before you even open the IRS website or pick up the phone, let's make sure you have everything you need lined up.

The absolute first rule: your LLC must be officially formed and registered with the state. The IRS won't issue a tax ID for a business that doesn't legally exist yet. If you try to apply before your state has approved your Articles of Organization, you’re guaranteeing yourself an immediate denial.

Confirming Your LLC Details

This might sound like basic stuff, but you'd be surprised how many applications get held up by simple typos or inconsistencies. The details you enter must be a perfect match for your official state formation documents.

Have these ready and double-check them for accuracy:

• Your LLC's official legal name: It needs to be identical to what’s on your Articles of Organization, right down to the "LLC" or "L.L.C." suffix.

• The LLC's principal business address: For our UK-based founders, this is almost always the US virtual address you've set up, not your home address back in the UK.

• The state and date of formation: The IRS needs to know exactly where and when your business was legally born.

I've seen it happen time and again: a simple typo in the company name or getting the formation date wrong is enough to get an application flagged for manual review. That can turn a quick process into a multi-week headache.

Think of it like applying for a passport—you wouldn't guess your date of birth. Treat your business details with that same level of precision.

Identifying the Responsible Party

Okay, this is the part that trips up most international founders. For every EIN application, the IRS requires you to name a “Responsible Party.” This is the one human being—not another company—who has ultimate control over the LLC.

For a single-member LLC, it's simple: you, the owner, are the Responsible Party. If you have partners in a multi-member LLC, you'll need to designate one of the members for this role.

Here's the critical bit for non-US residents: the IRS application process changes depending on whether the Responsible Party has a US tax ID number (SSN or ITIN). If one of your members has one, making them the Responsible Party is a huge advantage. It unlocks the fast online application, and you can get your EIN in minutes. If no one has an SSN or ITIN, that's perfectly fine—it just means you'll need to apply by fax or mail, which we’ll walk through in the next sections.

This concept can be confusing, so if you're fuzzy on the details, check out our in-depth guide that breaks down what the term Responsible Party means and what it implies for international owners.

Outlining Your Business Activities

Finally, you need to tell the IRS what your business actually does. Vague answers won't cut it. You’ll have to provide a clear, concise description of your main business activity.

For instance, instead of just saying "e-commerce," get more specific:

• "E-commerce retail of handmade leather goods to US consumers."

• "Software-as-a-service (SaaS) provider for project management tools."

• "Real estate investment company holding residential rental properties."

You'll also need to state the main reason you're applying. For most of you, the answer is simply "Started a new business." The form will also ask for the expected number of employees you'll hire in the next 12 months (which can be zero).

Taking 20-30 minutes to gather and verify all this information—your official LLC details, your Responsible Party, and a clear business description—is the single best thing you can do to ensure a fast, successful application. It’s a small investment of time that can save you weeks of hassle later on.

Choosing the Right EIN Application Method

So, you're ready to get your Employer Identification Number (EIN) from the IRS. You might think it's a straightforward, one-size-fits-all process, but it's not. The path you take to get this crucial number can mean the difference between being operational in minutes versus waiting for weeks.

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Getting this choice wrong is more than just a small stumble. I've seen it cause major headaches for founders—weeks of delays, missed banking deadlines, and a lot of unnecessary stress. It all boils down to one simple question: does the person you've named as the LLC's "Responsible Party" have a U.S. Social Security Number (SSN) or an Individual Taxpayer Identification Number (ITIN)?

For most international founders, especially those we work with from the UK, the answer is no. And that single detail changes everything. It dictates whether you can use the instant online method or if you need to settle in for the more traditional paper-based process.

This quick decision tree helps visualize those first crucial steps.

Remember, your LLC must be officially formed before you can even think about applying for an EIN. Once that's done, figuring out your application route is the very next step.

The Online Application: The Instant Win

The IRS's online portal is, by a long shot, the fastest way to get your EIN. If you're eligible, you can knock out the application in about 15 minutes and have your EIN in hand the moment you hit "submit." It's a fantastic feeling when you can get your number and move on to opening a bank account the same day.

But here’s the big catch: this express lane is exclusively for applicants whose Responsible Party has a valid SSN or ITIN. If you're a UK founder who happens to have a U.S. tax ID from previous work or investments, you're golden. Same goes if your business partner or designated manager has one.

A Quick Heads-Up: The IRS online portal has a notoriously short 15-minute inactivity timer. If you pause to look for a document, your session will time out, and you'll be forced to start all over. Gather everything you need before you begin.

For those who qualify, this is absolutely the way to go. The system walks you through the questions, and at the end, you can download the CP 575 confirmation letter. That's the official document you'll need for the bank.

The Form SS-4: The Standard Path for Global Founders

If you're like the vast majority of our non-resident clients from the UK, you don't have an SSN or ITIN. That means the online application is off the table. Your journey involves filing the classic Form SS-4, "Application for Employer Identification Number."

This is the tried-and-true method for foreign-owned LLCs, and you'll submit the form either by fax or international mail. It’s a more manual process, and it definitely requires patience. But don't worry—millions of businesses get their start this way. It just means you have to be extra careful.

How do the Form SS-4 methods stack up?

• By Fax: This is our recommended approach for non-residents. It's dramatically faster than mail and gives you a clear transmission record. You’re still looking at a wait, but it's the best option available.

• By Mail: Honestly, this should be your last resort. Between international postage delays and the IRS's own mailroom backlog, the wait can stretch out for a very long time.

The absolute key here is perfection on the Form SS-4. One tiny mistake—a misspelled name, an incorrect address, an answer that conflicts with your LLC formation documents—and the IRS will reject it. You'll get a letter in the mail weeks later and have to start the entire process from square one.

Comparing Your Application Options

Let's lay it out plainly. Your choice here directly impacts how fast you can get your U.S. company up and running.

Method	Who It's For	Processing Time	Key Benefit	Main Drawback
Online Application	LLCs where the Responsible Party has an SSN or ITIN.	Instant	You receive your EIN immediately upon completion.	Inaccessible to most non-resident founders.
Fax (Form SS-4)	Foreign-owned LLCs without an SSN or ITIN.	Several business days to weeks	Faster and more reliable than international mail.	Requires careful form preparation to avoid rejection.
Mail (Form SS-4)	Foreign-owned LLCs without an SSN or ITIN.	4+ weeks	A viable backup if faxing is not possible.	Very slow and prone to postal delays.

For nearly all UK founders we help at Set Up Stateside, the fax method is our standard playbook. We've refined the process over the years to get the forms right the first time, ensuring the quickest possible turnaround from the IRS.

The International Phone Call: A Niche Option

There is one other way, though it's a bit of a special case. International applicants can actually call a dedicated IRS phone line to get an EIN. To do this, you must have your Form SS-4 completely filled out and ready to go. You’ll read the answers, line by line, to an IRS agent.

While it sounds like a decent shortcut, it comes with its own set of hurdles. Wait times can be incredibly long, and the person on the phone must be an authorized representative of the LLC. At the end of a successful call, the agent will read the EIN to you verbally. It's a method best left to professionals who know exactly what the IRS agent is looking for and can navigate the conversation efficiently.

Ultimately, for those with a U.S. tax ID, the online portal is a no-brainer. For everyone else, a perfectly prepared Form SS-4 sent by fax is your most reliable path to getting that EIN and moving your business forward.

How to Get an EIN Without an SSN or ITIN

So you've formed your US LLC, but you've hit the first major roadblock for nearly every non-resident founder: you don't have a Social Security Number (SSN) or an Individual Taxpayer Identification Number (ITIN). This means the quick and easy online EIN application is off-limits.

Don't panic. This is a standard part of the process for international entrepreneurs. The solution is the tried-and-true paper application, Form SS-4. While it might seem a bit old-school, successfully navigating this form is your direct path to getting an EIN for an LLC. The trick is knowing exactly how to fill it out as a foreign owner, because one small mistake can get your application rejected and set you back weeks.

Let's walk through how to get it right the first time.

Mastering the Form SS-4 Application

The key to your EIN is a perfectly completed Form SS-4. You'll want to find the most current version of the form, which is always available on the IRS website, and submit it by fax. Trust me, faxing is dramatically faster than sending it by international mail.

The single most common point of failure for international founders happens on the line asking for a US tax ID. Leaving it blank is a surefire way to get your application flagged.

The secret is to be direct about your status. In line 7b, where the form asks for the responsible party's SSN, ITIN, or EIN, you need to write one simple word: "Foreign." This immediately tells the IRS agent reviewing your application why that field is empty and confirms you're following the correct procedure.

This one word prevents a "kicked back as incomplete" notice. It shows you understand the rules for your specific situation.

A Line-by-Line Look at Key Sections

While most of the form is straightforward, a few lines consistently trip people up. Here are the specific fields to pay close attention to, especially as a UK founder with a new US entity.

• Line 1 (Legal name of entity): This has to be an exact match to your LLC’s name as it appears on your state formation documents. Include the "LLC" or "Limited Liability Company" part. No variations!

• Lines 4a & 4b (Mailing address): This must be your US-based address, whether it’s a virtual mailbox or your registered agent’s address. Do not put your UK address here. The IRS will mail your official EIN confirmation to this US address.

• Line 7b (SSN, ITIN, EIN of responsible party): As we just covered, write "Foreign."

• Line 9a (Type of entity): Check the "Limited liability company" box. You'll then be asked for the number of members in the LLC and to confirm it was organized in the United States.

• Line 10 (Reason for applying): The best option is "Started a new business." For the description, keep it simple and clear, like "E-commerce sales" or "Digital marketing services."

• Line 11 (Date business started): Use the official formation date of your LLC. You can find this on your state-approved articles of organization.

Any mismatch between what you put on this form and what's on your official LLC documents can trigger a rejection from the IRS. It's their number one reason for denying these applications.

After You Fax Your Application

Once your completed Form SS-4 is faxed off to the IRS, the waiting begins. But you aren't completely in the dark.

Here's an insider tip I've learned from experience: if you want to call and check on the status, the best times are early in the morning (right around 7:00 AM Eastern Time) or late in the afternoon. Calling mid-day usually means you're in for a very long wait on hold.

Have a copy of your faxed SS-4 in front of you when you call. The agent will need details like the LLC name and the responsible party to find your application in their system.

If all goes well, the IRS will mail your official EIN confirmation, the CP 575 notice, to your US address. This letter is your golden ticket—it's the official proof you need for opening a US bank account.

What happens if it gets lost in the mail? It's not uncommon. If weeks go by with no letter, you can call the IRS and request an EIN Verification Letter (147C). This serves the exact same purpose and is fully accepted by banks. The IRS will only fax this letter, so you'll need to provide a secure fax number on the call.

At Set Up Stateside, we manage this entire process for our clients. We make sure the Form SS-4 is filled out flawlessly and handle all the back-and-forth with the IRS, which takes the guesswork and potential for costly delays completely off your plate.

You Have Your EIN—Now What?

Getting that nine-digit number from the IRS is a massive milestone. When you're holding the official confirmation letter, the CP 575 notice, it’s easy to feel like you’ve crossed the finish line. But in reality, that was just the starting gun. Now the real work begins: making your US business fully operational.

Think of your EIN as the master key that unlocks the entire US financial system for your LLC. With it, you can finally shift from being a company that just exists on paper to a living, breathing entity that can make money, pay bills, and grow. It's time to put that number to work.

Open a US Business Bank Account

Your very first task should be opening a dedicated US business bank account. This isn't just a good idea; it's a non-negotiable step for any serious founder. It forms the bedrock of clean financial management and, just as importantly, protects your personal liability.

Trying to run US business transactions through a personal account or your home bank in the UK is a recipe for an accounting nightmare. It can even pierce the corporate veil, putting your personal assets at risk.

For non-resident founders, the EIN for an LLC is the golden ticket. US banks require an EIN to verify your business's identity and open an account. Without it, the conversation is a non-starter. This simple step officially separates your business finances from your personal ones—a critical distinction for both the IRS and HMRC.

When you walk into the bank (or, more likely, apply online), make sure you have these documents handy:

• EIN Confirmation Letter (CP 575): This is the main document the bank wants to see. If you've misplaced it, don't panic. You can request an EIN Verification Letter (147C) from the IRS. You can learn more about how to get your EIN letter from the IRS if you hit a snag.

• LLC Formation Documents: This means your state-stamped Articles of Organization.

• Operating Agreement: This document shows who owns and manages the LLC.

• Personal Identification: Your UK passport is needed to verify the identity of all owners.

Establish Your Financial and Tax Systems

Once your bank account is live, your next priority is to build the systems that will keep your business compliant and organised from day one. Your EIN is the linchpin for all of these activities.

You'll need that EIN to register for state-level taxes. For instance, if you plan to sell products to customers in the US, you will almost certainly need to register for sales tax permits in states where you have a "nexus" (a significant business presence). State tax authorities use your federal EIN to connect all your accounts.

Getting your EIN is just step one. The real measure of success is building the financial infrastructure around it. A bank account, accounting software, and state tax registrations are the immediate next steps to turn your LLC into a real, operational business.

This is also the perfect time to get your accounting software up and running. Integrating a platform like Xero or QuickBooks with your new US bank account will automate most of the transaction tracking and make bookkeeping far less of a headache. Trust me, getting this sorted out now will save you a world of pain come tax season.

Prepare for Growth and Hiring

Even if hiring employees isn't on your immediate roadmap, your EIN lays the essential groundwork for when you're ready to expand. The moment you decide to bring on a US-based employee or even a contractor, that EIN becomes absolutely critical for managing payroll.

Here’s a quick rundown of why it matters so much:

1. Payroll Taxes: You are legally required to withhold federal and state payroll taxes from employee wages. Your EIN is the unique identifier you'll use when you send these funds to the government.

2. Employee Reporting: At the end of the year, you’ll use your EIN to file forms like the W-2 for each employee.

3. Contractor Payments: If you hire independent contractors and pay them more than $600 in a single year, you must file a Form 1099, which also requires your business's EIN.

By securing your EIN, you’ve already taken a crucial first step toward becoming a US employer. You're set up to scale your team compliantly whenever the time is right. Your EIN for an LLC is much more than a tax ID; it's your official ticket to participate fully in the US economy.

Your EIN Questions, Answered

Even after walking through the steps, a few specific questions always seem to pop up, especially for founders outside the US. Let's tackle some of the common "what ifs" we hear from entrepreneurs just like you.

How Long Does It Really Take to Get an EIN Without an SSN?

This is the big one. When you're applying by fax with Form SS-4, the official IRS processing time is listed as 7 to 15 business days. But in the real world, that's just part of the story.

Based on our experience helping hundreds of founders, you should realistically budget for 4 to 6 weeks from the day you fax the form to the day you have the physical CP 575 confirmation letter in your hands. This accounts for the inevitable back-and-forth within the IRS and the snail's pace of international mail. If you're eager to open a US bank account, be sure to build this longer timeline into your launch plan.

I Think I Made a Mistake on My Form SS-4. How Do I Fix It?

First, take a breath. If you’ve already sent your Form SS-4 and now realize there's a typo in your LLC’s name or address, your first instinct might be to send a corrected one. Don't do it. Firing off a second form can confuse the IRS and might lead them to issue two separate EINs for your company—a bureaucratic nightmare you definitely want to avoid.

Instead, the right move is to wait for the IRS to respond.

• If your application gets rejected: The IRS will mail you a notice explaining what was wrong. It’s a setback, but a clear one. Simply correct the original form based on their feedback and resubmit it.

• If your application is approved: Once you have the EIN, you can send a formal letter to the IRS detailing the error and requesting a correction. This is common for things like a wrong address, and it's crucial for making sure you receive important tax notices down the line.

Is It Worth Using a Third-Party Service to Get My EIN?

While the IRS doesn't charge a penny for an EIN, using a professional service can be a smart investment, particularly for non-residents. An experienced firm knows exactly what triggers a rejection and can ensure your Form SS-4 is filled out perfectly on the first try.

For a non-resident founder, a simple mistake on the form can easily cause a delay of several weeks. Think of a good third-party service as an insurance policy against those frustrating and costly delays. They handle the paperwork and the follow-up, so you can stay focused on what you do best.

These services also take on the headache of communicating with the IRS, saving you from potentially hours on hold trying to get a status update. For a small fee, you're buying peace of mind and, most importantly, speed.

I Lost My EIN Confirmation Letter. How Can I Find My Number Again?

Losing that original CP 575 notice happens more often than you'd think, so don't worry. You can get official proof of your EIN without much trouble. The most direct method is to call the IRS Business & Specialty Tax Line.

Once you’ve verified your identity as the LLC’s responsible party, you can ask for an EIN Verification Letter (147C). This is an official IRS document that serves the exact same purpose as the original notice and is accepted by every bank. The catch? The IRS will almost always insist on faxing this letter, so be sure you have a secure fax number ready before you pick up the phone.

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Getting your EIN is a critical first step, but it's just the beginning of your journey in the US market. At Set Up Stateside, we're here to guide you through everything that comes next—from formation and banking to ongoing compliance and tax strategy—to ensure your American venture is built on a solid foundation. Learn more about how we can help.