An EIN identifies a business. An ITIN identifies an individual. They are not interchangeable, and owning a US business does not automatically mean you need both, or even either, depending on your specific structure and situation.
Most of the confusion around this comes from onboarding forms, banks, and payment platforms that ask for “a tax ID” without specifying which one, and third-party guides that treat the two as if they solve the same problem. They don’t. One belongs to your company. The other belongs to you personally, and only applies in specific circumstances tied to your own US tax situation.
This guide breaks down exactly what each one is, when a foreign-owned LLC actually needs an EIN, when an individual owner might separately need an ITIN, and how the two interact with banking and payment platform onboarding. If you already know which one you need, NexusWorks’ ITIN and EIN services can handle the application directly.
EIN | ITIN | |
|---|---|---|
Identifies | Business or entity | Individual |
Issued by | IRS | IRS |
Used for | Business tax identification and filings | Individual federal tax purposes |
Who may need it | Businesses/entities meeting IRS requirements | Certain individuals with a US tax filing need, ineligible for an SSN |
Same as SSN? | No | No |
Automatic for every foreign founder? | No | No |
Neither is automatically required just because you own a US business. The actual requirement depends on business structure, owner status, federal tax classification, IRS filing obligations, banking needs, payment platform requirements, and individual tax circumstances, covered section by section below.
An Employer Identification Number is a nine-digit federal tax ID issued by the IRS to identify a business entity, similar in function to how an SSN identifies an individual. Despite the name, the business does not need to have employees to obtain or need one; the term “Employer” reflects the number’s original purpose and has stuck around even though EINs are now used far more broadly. Full details are on IRS EIN guidance.
An LLC, corporation, partnership, or other entity generally needs an EIN to file federal business tax returns, open a business bank account, run payroll if it has employees, and complete tax identification verification for banking and many payment platforms. Whether a specific entity is legally required to have one depends on its structure and activity, covered in the next section.
An Individual Taxpayer Identification Number is a nine-digit number the IRS issues to individuals who have a US federal tax purpose requiring a taxpayer identification number, but who do not have and are not eligible to obtain a Social Security Number. This is explained directly on the IRS taxpayer identification number page. An ITIN is issued through Form W-7.
An ITIN identifies a person, not a business. It exists specifically to allow individuals without SSN eligibility to meet US tax obligations, such as filing a personal return, being claimed as a dependent or spouse on someone else’s return, or claiming a tax treaty benefit. It carries no immigration status, no work authorization, and no eligibility for Social Security benefits.
Factor | EIN | ITIN |
|---|---|---|
Who receives it | The business entity | An individual person |
Application form | Form SS-4 | Form W-7 |
Typical trigger | Forming a US entity, opening a business bank account, hiring | An individual US tax filing requirement, treaty claim, or reporting need |
Requires a tax return to apply? | No | Generally yes, attached to the W-7, with limited exceptions |
Banking use | Primary business tax ID for account opening | May support individual identity/tax verification in some cases |
Marketplace verification | Commonly requested for the business | Sometimes requested for the individual, varies by platform |
Relationship to SSN | Entirely separate; not an individual ID | A substitute specifically for individuals ineligible for an SSN |
Does one replace the other? | No — a business still needs its own EIN even if the owner has an ITIN | No — an individual generally cannot use the business’s EIN in place of their own ITIN where one is needed |
In most practical situations, yes, though the precise legal answer depends on structure and activity.
A single-member LLC owned by a foreign individual is, by default, a disregarded entity for federal tax purposes. Despite being disregarded for income tax purposes, it generally still needs its own EIN, particularly because foreign-owned disregarded entities commonly have federal information-reporting obligations that require one, separate from whether the entity owes income tax.
A multi-member LLC defaults to partnership tax treatment and generally needs an EIN to file the partnership return and issue K-1s to its members, regardless of where those members live.
A corporation, whether taxed as a C-Corp or electing S-Corp status where eligible, needs an EIN to file its own corporate return.
Beyond the strict tax classification question, an EIN is generally required to open a US business bank account and to complete verification on most payment and marketplace platforms, which makes it a practical necessity for almost every foreign-owned US entity even in edge cases where the technical filing requirement might be narrower.
This depends entirely on the individual’s own US tax circumstances, not simply on the fact that they own a US business. Owning a US LLC does not, by itself, create a personal ITIN requirement.
Situations where an ITIN may become relevant for an individual owner include having a personal US tax filing requirement separate from the business, such as US-source income that flows to the individual and requires a personal return; claiming a benefit under a tax treaty between the US and the owner’s home country; certain federal information-reporting situations tied to the individual rather than the entity; or being included on someone else’s US tax return as a spouse or dependent.
A foreign founder whose LLC is disregarded for tax purposes and who has no personal US tax filing obligation may not need an ITIN at all, even while the LLC itself has an EIN and its own reporting obligations. This is exactly the distinction that gets missed constantly, and it is worth its own section.
Yes, and this is one of the most common points of confusion for foreign founders.
The business and the individual are evaluated separately. A foreign founder can own a US LLC, the LLC can obtain its own EIN through the standard process for foreign applicants, and the individual founder may or may not separately need an ITIN, entirely depending on their own personal US tax circumstances.
Foreign founder owns a US LLC → the LLC obtains an EIN → the founder may or may not need an ITIN, depending on whether the founder personally has a US tax filing requirement, treaty claim, or reporting situation that specifically calls for one.
An EIN application for a foreign-owned entity does not require the responsible party to already have an ITIN. The IRS process specifically accommodates this, covered in the application section below.
Banks and financial platforms request taxpayer identification information as part of their Know Your Customer and Anti-Money Laundering compliance obligations, not simply as a formality. A business account will generally require the entity’s EIN. Beyond that, the bank will also typically want to verify the individual owner or owners: passport, address, and beneficial ownership information are all commonly requested alongside the entity’s EIN.
An EIN alone does not guarantee that any specific bank will approve an account or complete onboarding without additional individual documentation. Requirements vary meaningfully between institutions, and some banks request an ITIN or equivalent individual documentation from foreign owners as part of their own compliance process, while others do not. This should be confirmed directly with the specific bank rather than assumed.
Payment and marketplace platforms generally request some combination of an EIN, an individual SSN or ITIN, a passport, business registration documents, beneficial ownership information, address verification, and applicable tax forms such as a W-8BEN or W-8BEN-E for foreign owners. Exactly what is requested, and whether an EIN alone is sufficient, varies by platform and can change over time. Stripe, for example, documents its own tax ID requirements for business representatives directly, including scenarios where a non-US individual provides a local non-US tax ID rather than an SSN or ITIN.
No single identification number universally satisfies every platform’s requirements in every situation. Amazon, Stripe, PayPal, and similar platforms each maintain their own onboarding and verification policies, which are updated periodically. Before assuming which ID a specific platform will require, check that platform’s current official documentation directly, since third-party guides frequently describe outdated requirements or overstate what actually worked for one specific account configuration.
The process follows a defined sequence:
Because the IRS online EIN application requires the responsible party to already have a valid SSN, ITIN, or EIN, and requires a US-based principal location, most foreign applicants cannot use the online system. Instead, applications are completed by phone, fax, or mail using Form SS-4. Per current IRS instructions, when the responsible party does not have and is not eligible for an SSN or ITIN, the applicant enters “foreign” on the relevant line rather than leaving it blank. Full instructions are on IRS EIN guidance. Applying for an EIN does not require obtaining an ITIN first, and it does not require the responsible party to obtain one at all if no separate individual tax circumstance calls for it.
An ITIN application uses Form W-7, and in most cases must be submitted together with the federal tax return that creates the need for the ITIN, unless the applicant qualifies for one of the specific exceptions described in the form’s instructions, such as certain treaty-benefit claims.
Applicants must submit documentation proving both identity and foreign status. A valid passport is the only single document that satisfies both requirements on its own; without a passport, at least two other documents from the IRS’s approved list are required, at least one including a photograph.
Applications can be submitted by mail with original or properly certified documents, in person at an IRS Taxpayer Assistance Center, or through an IRS-authorized Certifying Acceptance Agent, who can verify identity documents without requiring the applicant to mail original documents to the IRS. Per current IRS guidance on applying from abroad, the standard processing window is approximately seven weeks, extending to nine to eleven weeks during peak filing season or for applications filed from overseas. These are general processing patterns, not guarantees, and can change.
☐ Assuming EIN and ITIN are interchangeable, when they identify entirely different things
☐ Applying for an ITIN simply because you own a US LLC, without an actual individual tax filing need
☐ Assuming that obtaining an EIN or ITIN makes you a US tax resident — neither one does
☐ Assuming an ITIN can replace a business’s EIN requirement, or vice versa
☐ Using the owner’s personal tax ID where the business’s EIN is actually required
☐ Assuming every bank has identical identification requirements for foreign-owned entities
☐ Assuming marketplace or payment platform requirements never change
☐ Ignoring foreign-owned LLC federal reporting obligations that exist independently of whether income tax is owed
Reading through the distinctions above is useful, but working through your own specific situation is what actually answers the question. The US Tax ID Requirement Flowchart walks through the same decision points covered in this article in a quick, visual format, to help you identify which requirements are worth investigating further for your business.
NexusWorks helps foreign founders determine exactly which US tax identification they need, and manages the application process directly, through NexusWorks’ ITIN and EIN services. This is not a guarantee of approval; it is direct, informed support through a process that trips up a lot of founders navigating it alone.
Apply for EIN/ITIN to get started with the right application for your situation.
An EIN identifies the business. An ITIN identifies an individual. A foreign founder may need one, the other, both, or neither, depending entirely on their business structure and personal tax circumstances, not on a blanket rule that applies to every international business owner.
Getting this distinction right from the start avoids wasted applications, banking delays, and confusion during platform onboarding. If you’re not sure which applies to your situation, NexusWorks’ ITIN and EIN services can walk through your specific structure and tell you exactly what’s actually needed.
An EIN identifies a business or entity for federal tax purposes. An ITIN identifies an individual who has a US tax purpose requiring a taxpayer ID but is not eligible for a Social Security Number. They serve different purposes and are not interchangeable.
In most practical situations, yes. Single-member disregarded entities, multi-member partnerships, and corporations generally each need their own EIN for federal filing purposes, and an EIN is also typically required for business banking and platform verification regardless of the narrower tax classification question.
Yes. Foreign applicants without an SSN or ITIN can apply by phone, fax, or mail using Form SS-4, entering "foreign" on the line requesting the responsible party's SSN or ITIN, per current IRS instructions.
Only if the individual has a specific personal US tax filing requirement, treaty claim, or reporting situation that calls for one. Owning a US LLC alone does not automatically create an ITIN requirement.
No. A business generally still needs its own EIN for entity-level tax filings and banking, even if the owner separately holds an ITIN for personal tax purposes.
Requirements vary by platform, account type, and business structure, and they change over time. Most platforms request some combination of an EIN, individual identification, and beneficial ownership information. Check the specific platform's current official documentation rather than assuming one ID universally satisfies every platform.
No. An EIN identifies a business entity for federal tax purposes and has no bearing on an individual's personal tax residency status.
By submitting Form W-7 along with the federal tax return that creates the need for the ITIN, in most cases, plus documentation proving identity and foreign status, either by mail, in person at an IRS Taxpayer Assistance Center, or through a Certifying Acceptance Agent.
