ITIN vs EIN: Which Do You Actually Need as a Non-Resident Owner?

ITIN vs EIN: what’s the actual difference?

An EIN identifies your business; an ITIN identifies you personally. They are not interchangeable. The IRS defines the EIN (Employer Identification Number) as a number “used to identify a business entity,” while an ITIN (Individual Taxpayer Identification Number) is “a tax processing number” for individuals who can’t get a Social Security number. For most non-resident LLC owners, only the EIN matters. (IRS — Taxpayer identification numbers)

The confusion is understandable: both are nine-digit numbers issued by the IRS, and both are “taxpayer identification numbers” (TINs). But they answer different questions. The EIN answers “What is this company?” The ITIN answers “Who is this person who owes or reports US tax but has no SSN?” You can own and operate a US LLC for years with an EIN and never need an ITIN — because the company, not you, is the entity the IRS is tracking through the EIN.

Do I need an ITIN for my LLC?

In most cases, no. You can form a US LLC, obtain its EIN, and open a US business bank account using only the EIN — no ITIN is required. The IRS issues the EIN to the business entity itself, and the responsible-party line on Form SS-4 explicitly accepts “Foreign” when you have no SSN or ITIN. (IRS — Instructions for Form SS-4)

An ITIN only enters the picture when you, the individual, have a US federal tax obligation that requires a personal taxpayer number. The IRS is precise about this: “You need an ITIN if you have a federal tax purpose and you’re not eligible for an SSN.” Forming a company is not, by itself, a personal federal tax purpose. So the threshold question is simply: do I personally have to file or be reported on a US tax document? If the answer is no, you don’t need an ITIN. (IRS — Individual taxpayer identification number (ITIN))

What is an EIN, and who is it issued to?

An EIN is a nine-digit federal tax ID issued to a business entity — an LLC, corporation, partnership, estate, or trust. The IRS describes it as a number “used to identify a business entity” and “a federal tax ID number for businesses, tax-exempt organizations and other entities.” It is free, and the IRS states you “can get an EIN for free directly from the IRS.” (IRS — Taxpayer identification numbers; IRS — Employer Identification Number)

A US LLC needs an EIN to open a business bank account, file federal returns, hire employees, and — for foreign-owned single-member LLCs — file the mandatory Form 5472 information return. Critically, a non-resident does not need a personal US tax ID to obtain the company’s EIN. On Form SS-4’s responsible-party line (Line 7b), the IRS instructs applicants who have no SSN or ITIN and are ineligible for one to “enter ‘foreign’.” The EIN belongs to the company, so your lack of a personal number is no barrier. (IRS — Instructions for Form SS-4)

What is an ITIN, and who is it issued to?

An ITIN is a nine-digit number issued to an individual who needs a US taxpayer ID for federal tax purposes but isn’t eligible for an SSN. The IRS defines it as “a 9-digit number the IRS issues if you need a U.S. taxpayer identification number for federal tax purposes, but you aren’t eligible for a Social Security number (SSN).” It is formatted like an SSN and begins with “9.” (IRS — Taxpayer identification numbers)

An ITIN is deliberately narrow in scope. The IRS states plainly that “an ITIN is issued by the IRS for federal tax purposes only,” and that it does not:

• “Qualify you for Social Security benefits or the Earned Income Tax Credit”
• “Provide or change immigration status”
• “Authorize you to work legally in the U.S.”
• “Serve as identification outside the federal tax system”

So an ITIN is not a work permit, not an immigration document, and not a general-purpose ID. It exists for one reason: to let an SSN-ineligible person satisfy a US federal tax filing or reporting obligation. (IRS — Individual taxpayer identification number (ITIN))

EIN vs ITIN vs SSN: a side-by-side comparison

The cleanest way to see the distinction is to compare all three taxpayer identification numbers on what they identify, when you need them, how you get them, and what they cost. Note that an SSN is the only one issued by the Social Security Administration; the IRS states “all other TINs are issued by the IRS.” (IRS — Taxpayer identification numbers)

Sources: IRS — Taxpayer identification numbers; IRS — Instructions for Form SS-4; IRS — Instructions for Form W-7.

When do I actually need an ITIN?

You need an ITIN only when you personally have a US federal tax purpose and aren’t eligible for an SSN. The two scenarios most relevant to non-resident LLC owners are: (1) you must file your own US individual return, such as Form 1040-NR; or (2) you’re claiming a reduced-withholding tax-treaty benefit that requires an ITIN. Both are personal obligations — not company obligations. (IRS — Instructions for Form W-7)

Form W-7’s reason boxes make the triggers explicit. The application requires you to select one reason, and the two that matter most here are:

• Box a — “Nonresident alien required to get an ITIN to claim tax treaty benefit.”
• Box b — “Nonresident alien filing a U.S. federal tax return.”

In practice, a non-resident owner of a US LLC that earns no US-effectively-connected income, has no US tax filing obligation of their own, and isn’t claiming a personal treaty benefit typically has no Box-a or Box-b trigger — and therefore no need for an ITIN. Whether your specific facts create a personal US filing requirement is a tax question; confirm it with a qualified tax professional. (IRS — Instructions for Form W-7)

Quick checklist: do you need an ITIN?

1. Do you personally have to file a US individual return (e.g., Form 1040-NR)? If yes → likely need an ITIN.
2. Are you claiming a tax-treaty benefit that requires a US taxpayer number? If yes → likely need an ITIN.
3. Are you a dependent or spouse being claimed on a US return? If yes → possibly need an ITIN (Boxes d/e).
4. Do you only need to form the LLC, get its EIN, and open a bank account? If yes → an EIN alone is normally enough; no ITIN required.

Can I open a US business bank account with just an EIN (no ITIN)?

Yes. A US business bank account is opened in the name of the business, using the business’s EIN — not your personal taxpayer number. Because the IRS issues the EIN to identify the entity, banks rely on it (alongside your formation documents and personal identity ID, such as a passport) rather than requiring you to hold an ITIN. (IRS — Taxpayer identification numbers)

Banks and fintech platforms verify the company through its EIN confirmation (the IRS CP-575 notice or a 147C letter), the state formation documents, and your personal identification. None of that requires an ITIN. An ITIN is a federal tax filing number, not a banking number — so it is not a prerequisite for account opening. This is one of the most common points of confusion for first-time non-resident founders, and the practical takeaway is simple: get the LLC, get the EIN, open the account; revisit the ITIN question only if and when you have a personal US filing obligation.

How do I get an EIN? (Form SS-4)

You get an EIN by filing Form SS-4, and it’s free directly from the IRS. Domestic applicants can use the online tool and receive the EIN “in minutes.” Non-residents without an SSN/ITIN can’t use the online tool but can apply by international phone (immediate), fax (generally ~4 business days), or mail (~4 weeks). (IRS — Employer Identification Number)

The key non-resident step is Line 7b. Where the form asks for the responsible party’s SSN, ITIN, or EIN, the IRS instruction is to “enter ‘foreign’” if you have none and are ineligible to obtain one. That single instruction is what lets a founder with no US personal tax ID still secure the company’s EIN. The EIN, once issued, is permanent and free. (IRS — Instructions for Form SS-4)

For founders who’d rather not navigate international fax lines and paperwork, EIN.LLC prepares and files Form SS-4 (and forms the LLC and sets up US business banking) for non-residents with no SSN — typically returning the EIN in about 3–5 business days — for a flat $399 + the state filing fee. It’s a filing service, not a law or tax firm, and the EIN itself is always free from the IRS; you’re paying for the done-for-you handling.

How do I get an ITIN? (Form W-7)

If you’ve confirmed you have a federal tax purpose, you apply for an ITIN using Form W-7, submitted with your supporting documents and — in most cases — the federal tax return the ITIN is needed for. You can file by mail to the IRS ITIN Operation in Austin, in person at an IRS Taxpayer Assistance Center, or through a Certifying Acceptance Agent (CAA). Plan for roughly 7 weeks of processing time. (IRS — How to apply for an ITIN)

The IRS states: “Allow 7 weeks for the IRS to notify you of your ITIN application status (9 to 11 weeks if you submit the application during peak processing periods (January 15 through April 30) or if you’re filing from overseas).” Because mailing original identity documents (like a passport) to the IRS is risky, many applicants use a CAA: per the IRS, a Certifying Acceptance Agent “can authenticate all identification documents for primary and secondary taxpayers,” so you don’t have to surrender originals by mail. (IRS — Instructions for Form W-7; IRS — ITIN Acceptance Agent Program)

One more nuance: an ITIN can expire. If an ITIN isn’t used on a US federal tax return for three consecutive years, it expires on December 31 of that third year and must be renewed (again via Form W-7) before it’s used on a return. (IRS — How to renew an ITIN)

FAQ

Do I need an ITIN to form an LLC or get an EIN? No. The IRS issues the EIN to the business entity, and Form SS-4 lets a responsible party with no SSN or ITIN write “Foreign” on Line 7b. You can form the LLC and obtain its EIN with no personal US tax ID.

Can I open a US business bank account with only an EIN? Yes. The account is in the company’s name and uses the company’s EIN. Banks verify the business via the EIN, formation documents, and your passport — an ITIN is not required to open the account.

What’s the real difference between an EIN and an ITIN? An EIN identifies a business entity; an ITIN identifies an individual who needs a US tax ID but can’t get an SSN. Both are nine-digit IRS numbers, but they apply to a company versus a person, respectively.

When do I actually need an ITIN as a non-resident owner? Only when you personally must file a US federal return (such as Form 1040-NR) or claim a tax-treaty benefit that requires a personal US taxpayer number. Forming a company is not, by itself, a personal tax purpose.

How long does an ITIN take, and how do I apply? You apply with Form W-7 by mail, at an IRS Taxpayer Assistance Center, or through a Certifying Acceptance Agent. The IRS says to allow about 7 weeks, or 9–11 weeks in peak season (Jan 15–Apr 30) or when filing from overseas.

Is an ITIN a work permit or proof of immigration status? No. The IRS states an ITIN is “for federal tax purposes only” and does not authorize work, provide or change immigration status, or serve as ID outside the federal tax system.

Does an ITIN cost money? The IRS issues ITINs at no charge; Form W-7 is free to file. A Certifying Acceptance Agent may charge a service fee for authenticating your documents, but the number itself carries no IRS fee.

Last updated June 2026 · EIN.LLC editorial team. This is general information, not legal or tax advice — consult a professional for your situation.

Primary sources:

• IRS — Taxpayer identification numbers (TIN)
• IRS — Individual taxpayer identification number (ITIN)
• IRS — Instructions for Form W-7 (12/2024)
• IRS — How to apply for an ITIN
• IRS — ITIN Acceptance Agent Program
• IRS — How to renew an ITIN
• IRS — Employer Identification Number
• IRS — Instructions for Form SS-4