If you're forming a US LLC as a non-resident, the alphabet soup of IRS numbers can feel overwhelming — EIN, ITIN, SSN. Which one do you actually need, and in what order?
Here's the direct answer: your LLC needs an EIN — the business's federal tax ID — almost immediately after formation, for banking, payment processing, and IRS filings. An ITIN, by contrast, is a personal tax ID you only need if you, as an individual, have a US tax filing obligation, such as reporting income on Form 1040-NR. Most non-resident LLC owners need an EIN right away; far fewer actually need an ITIN, and it's entirely possible to run a fully compliant US LLC with an EIN alone.
In this guide, we'll break down exactly what each number does, when you need one versus both, and how to apply for each — step by step.
What Is an EIN, Exactly?
An Employer Identification Number (EIN) is a nine-digit federal tax ID, formatted as XX-XXXXXXX, that the IRS assigns to identify a business entity for tax purposes. Think of it as your LLC's equivalent of a Social Security Number — it's how the IRS, banks, and payment processors recognize your business as a distinct entity.
Every US LLC needs an EIN, regardless of whether the owner is a US citizen, a resident, or a foreign national living entirely outside the country. Importantly, you do not need a Social Security Number or ITIN to obtain an EIN — the IRS explicitly accommodates foreign applicants through dedicated application methods that don't require either.
What Is an ITIN, Exactly?
An Individual Taxpayer Identification Number (ITIN) is a personal tax ID issued to individuals who have a US tax filing or reporting obligation but aren't eligible for a Social Security Number. Unlike the EIN, which identifies your business, the ITIN identifies you personally to the IRS.
The key distinction: EIN is for your business. ITIN is for you personally — and you only need the ITIN if you individually have a reason to file a US tax return, separate from your LLC's own reporting requirements.
EIN vs ITIN: Quick Comparison Table
EIN vs ITIN: Quick Comparison
👤 Who it's for — EIN: The business entity (your LLC) | ITIN: Individuals without SSN eligibility
📄 Application form — EIN: IRS Form SS-4 | ITIN: IRS Form W-7
🆔 Requires SSN/ITIN? — EIN: No | ITIN: No
💰 Application cost — EIN: Free | ITIN: Free
📬 Application method (non-residents) — EIN: Phone, fax, or mail (online not available) | ITIN: Mail, Certifying Acceptance Agent, or IRS Taxpayer Assistance Center
⏱️ Typical processing time — EIN: Phone same-day, Fax 4–7 business days, Mail 4–6 weeks | ITIN: 7–9 weeks standard, 9–11 weeks peak season
🛠️ Used for — EIN: Banking, Stripe/PayPal, Form 5472, Amazon Seller Central, hiring | ITIN: Form 1040-NR filing, claiming tax treaty benefits
Does My LLC Need an EIN or an ITIN?
For the vast majority of non-resident LLC owners, the answer is: you need an EIN for your business almost immediately, and you may or may not need an ITIN depending on your personal situation.
Your LLC needs an EIN to:
- Open a US business bank account — Mercury, Relay, and Wise Business all require a verified EIN before opening an account for a foreign-owned LLC.
- Activate payment processors — Stripe, PayPal Business, and similar platforms require an EIN, not a personal tax number, to process payments under your LLC's name.
- File Form 5472 — Foreign-owned single-member LLCs must file this information return annually alongside a pro forma Form 1120, and the EIN is what ties this filing to your business.
- Open an Amazon Seller Central account — Amazon requires an EIN to link a professional seller account to a US LLC entity.
- Hire US-based employees or contractors — Payroll processors won't run without a valid EIN on file.
You only need an ITIN if you, as an individual, have a personal US tax filing requirement — most commonly reporting effectively connected income (ECI) on Form 1040-NR, or if you want to claim reduced withholding under a tax treaty between the US and your home country.
If you're still exploring whether a US LLC is the right structure for you at all, our guide on registering a US LLC from Pakistan walks through the foundational formation steps before tax ID questions come into play.
Can I Get an EIN Without an ITIN?
Yes, absolutely — this is one of the most common misconceptions among first-time foreign LLC owners. The IRS explicitly allows foreign applicants without an SSN or ITIN to obtain an EIN. On Form SS-4, Line 7b (which asks for the responsible party's SSN or ITIN), foreign applicants without either simply write "Foreign" — this is the officially accepted approach and does not delay or block the application when done correctly.
In fact, most non-resident founders should obtain their EIN before ever considering whether they need an ITIN, since the EIN unlocks banking and payment processing immediately, while the ITIN question depends entirely on your personal tax situation, which often isn't clear until later.
How to Apply for an EIN as a Non-Resident
Since the IRS's online EIN application requires an SSN or ITIN, non-residents must use one of three alternative methods:
- Phone (fastest, if it connects) — Call the IRS International EIN line at +1-267-941-1099, available Monday through Friday, 6am–11pm Eastern Time. Have your completed Form SS-4 ready, as the agent will verify each field with you before issuing your EIN verbally on the call.
- Fax (most reliable for non-residents) — Fax your completed Form SS-4 to the IRS. Most applications are processed within 4–7 business days, with the EIN confirmation returned by fax.
- Mail (slowest, use only if phone/fax aren't accessible) — Mail your Form SS-4 to the IRS EIN International Operation in Cincinnati, Ohio. Processing typically takes 4–6 weeks.
For the phone method specifically, be prepared for potential identity verification questions, since the agent has no SSN to cross-reference — having your LLC formation documents on hand helps this go smoothly.
Common Mistakes That Delay EIN Applications
- Leaving Line 7b blank instead of writing "Foreign" — An empty field can cause processing delays or rejection; always explicitly write "Foreign" if you have no SSN or ITIN.
- LLC name mismatch — The name on your SS-4 must exactly match your state-approved Articles of Organization, down to punctuation and capitalization.
- Using the online application — It will simply reject foreign applicants without an SSN or ITIN; always use phone, fax, or mail instead.
- Applying before LLC formation is complete — You need your approved Articles of Organization and formation date before submitting Form SS-4.
- Using a personal address instead of your registered agent's address — This can create verification mismatches down the line, particularly when filing Form 5472.
If you're still deciding which state to form your LLC in before tackling the EIN application, our breakdown of the best state to form an LLC for Amazon FBA covers that decision first.
When Do You Actually Need an ITIN?
An ITIN becomes necessary in more specific circumstances than an EIN:
- You personally owe US tax on effectively connected income and need to file Form 1040-NR
- You want to claim tax treaty benefits that reduce or eliminate withholding on certain income types, which generally requires a valid ITIN to access
- You're a non-resident alien LLC owner who needs to file a personal return alongside your LLC's business filings
Notably, having an EIN for your LLC does not automatically create a personal ITIN requirement. Many non-resident founders operate their entire US LLC — banking, payments, Form 5472 filings — using only an EIN, without ever needing an ITIN, particularly if their LLC income isn't classified as effectively connected income requiring personal US tax filing.
Do Foreign-Owned LLCs Need Both EIN and ITIN?
Not necessarily, and this is worth understanding clearly: the EIN is essentially mandatory for any functioning US LLC, while the ITIN is conditional and depends entirely on your individual tax situation. A significant number of non-resident LLC owners go their entire ownership tenure using only an EIN, since their personal tax obligations don't trigger the need for an ITIN.
That said, if you do have a personal filing requirement, both numbers work together rather than replacing one another — the EIN stays on your business filings (Form 5472, Form 1120 pro forma), while the ITIN goes on your personal return (Form 1040-NR).
EIN vs ITIN vs SSN: Where Does SSN Fit In?
For US citizens and residents, the SSN handles both personal identification and, when forming a business, often ties directly to their EIN application through the standard online portal. For non-residents, the SSN simply isn't available — which is exactly why the IRS built separate pathways: the EIN for business identification (via phone, fax, or mail) and the ITIN for personal tax identification (via Form W-7), neither of which requires an SSN to obtain.
Comparing US and UK Structures
If you're still weighing whether a US LLC is even the right structure for your business compared to alternatives like a UK LTD, our detailed comparison of US LLC vs UK LTD for ecommerce breaks down the tax ID and compliance differences between the two jurisdictions, and our guide on registering a UK company as a non-resident covers that alternative pathway in detail.
If your business involves selling on Amazon or Shopify specifically, our related guide on what an ITIN is and why Amazon and Shopify sellers need one goes deeper into the platform-specific reasons an ITIN sometimes becomes necessary for individual sellers.
Why Work With Brandora Services for Your EIN and ITIN Applications
Navigating IRS phone lines and fax queues from a different time zone, with no SSN to fall back on, is genuinely one of the most frustrating parts of starting a US business as a foreign national. A single mistake on Form SS-4 — a blank field, a name mismatch — can add weeks to your timeline.
At Brandora Services, we handle EIN applications, ITIN determinations, and full US LLC formation for international founders, ensuring every field is completed correctly the first time and that you understand exactly which numbers your business actually needs — not more, not less.
Book a free consultation with Brandora Services to get your EIN, and your broader US business structure, set up correctly from day one.
FAQs About EIN vs ITIN for US LLCs
What is the difference between an EIN and an ITIN? An EIN identifies your business entity for federal tax purposes, while an ITIN identifies you personally when you're not eligible for a Social Security Number. Your LLC needs an EIN; you only need an ITIN if you have a personal US tax filing obligation.
Does my LLC need an EIN or an ITIN? Your LLC needs an EIN almost immediately for banking, payment processing, and required filings like Form 5472. You only need an ITIN separately if you personally have a US tax return to file.
Can I get an EIN without having an ITIN first? Yes. The IRS explicitly allows foreign applicants without an SSN or ITIN to obtain an EIN by writing "Foreign" on Form SS-4's responsible party field, applying via phone, fax, or mail instead of the online portal.
Do non-US residents need an ITIN to form an LLC? No. Forming and owning a US LLC requires no SSN or ITIN at all. An ITIN only becomes relevant if you personally have a US tax filing requirement separate from your LLC's business-level filings.
Do I need both an EIN and an ITIN for my business? Not necessarily. Many non-resident LLC owners operate entirely on an EIN alone. Both are only needed together if you have a personal US tax filing obligation requiring Form 1040-NR alongside your LLC's Form 5472.
How long does it take to get an EIN for an LLC? For non-residents, phone applications can be same-day if the call connects, fax applications typically take 4–7 business days, and mail applications take approximately 4–6 weeks.
Final Thoughts
The EIN vs ITIN confusion trips up nearly every first-time non-resident LLC owner, but the distinction is simpler than it first appears: your business needs an EIN, almost always right away, while you personally may or may not need an ITIN depending on your specific tax circumstances. Getting the EIN application right the first time — correct SS-4 fields, exact name matching, the right application method — saves weeks of avoidable delay in opening your bank account and activating payment processors.
Ready to get your EIN application handled correctly? Book a free consultation with Brandora Services, and let our team guide you through EIN applications, ITIN determinations, and full US LLC compliance — so you can focus on running your business instead of navigating IRS phone lines.
For official, authoritative guidance, the IRS's Form SS-4 instructions and Form W-7 application page remain the definitive sources to confirm current requirements before you apply.