Is an EIN a TIN? US Tax IDs Explained for Foreign Owners

A founder in Buenos Aires writes to her accountant: she has just registered a Wyoming LLC, the IRS sent back a nine-digit number on a notice, and now a US payment processor is asking for her "TIN." She has an EIN. Is that the same thing? It is one of the most common points of confusion for non-resident owners, because the US tax code uses one umbrella term and several specific ones underneath it, and the forms rarely explain the relationship. The short version is that yes, an EIN is a type of TIN. The longer version is worth understanding, because using the wrong identifier in the wrong field is exactly the kind of mistake that gets an application or a bank form bounced.

Is an EIN a TIN?

Yes. The question "is EIN a TIN" has a one-word answer, and the answer is yes. "TIN" stands for Taxpayer Identification Number, and it is the IRS umbrella category for every identifier used to file or report US taxes. An EIN, or Employer Identification Number, is one specific kind of TIN: the one issued to a business entity. So when a bank, processor, or W-9 asks for your TIN and your business has an EIN, the EIN is the number you supply. They are not competing IDs. One is the family, the other is a member of that family.

This trips people up because the words look like alternatives on a dropdown menu. They are not. The TIN is the question; the EIN is one of the valid answers. A Social Security Number is another, and an ITIN is a third. Which one applies depends on whether you are identifying a person or a business.

What are the different types of TIN?

A TIN is any of several IRS-issued numbers, and there are five in common use. Each is nine digits, and each is tied to either a person or an entity. Knowing which is which is most of the battle.

• SSN (Social Security Number) issued by the Social Security Administration to US citizens and authorized residents. It identifies an individual.
• EIN (Employer Identification Number) issued by the IRS to a business entity, including a single-member LLC. It identifies the company, not the owner.
• ITIN (Individual Taxpayer Identification Number) issued by the IRS to individuals who must file or be reported on a US return but are not eligible for an SSN. It always begins with a 9.
• ATIN (Adoption Taxpayer Identification Number) a temporary number for a child in a pending US adoption. Rare and irrelevant to most founders.
• PTIN (Preparer Tax Identification Number) used by paid tax preparers when they sign a return. Also not something a business owner applies for.

For a non-resident running a US company, only three of these matter in practice: the EIN for the business, and either an SSN or an ITIN for the person, depending on circumstances. Most non-resident founders never get an SSN and do not need one to form a company or get an EIN for it.

What is the difference between an EIN and a TIN?

There is no difference in the sense of two competing numbers, because an EIN is a TIN. The real distinction is scope: TIN is the general term for any US tax identifier, and EIN is the specific term for the one assigned to a business. Asking "EIN or TIN?" is like asking "is it a sedan or a car?" The sedan is a car. The EIN is a TIN.

Where it gets practical is which number goes in which box. If a form asks for the entity's TIN, you enter the EIN. If a form asks for an individual's TIN, you enter that person's SSN or ITIN. On a US W-9, for instance, a single-member LLC owned by a foreign person is generally completed with the entity name and the EIN in the TIN field. Reading the form's wording, "business" versus "individual," tells you which identifier it actually wants.

Do I need an ITIN if my LLC already has an EIN?

Usually not just to operate the business. An EIN identifies the LLC and is what banks, processors, and the IRS use to recognize the company itself. An ITIN identifies you as an individual, and you only need one when you personally have a US filing or reporting obligation, for example when you must be listed on a US tax return or claim a tax-treaty benefit on certain income. Forming the company and getting its EIN do not, by themselves, require you to hold an ITIN.

The Argentine founder from the opening is a clean example. Her Wyoming LLC has its EIN, which is all her processor needed for the business account questions. Whether she later needs an ITIN depends on her personal US tax situation, which is a separate question she should put to a cross-border tax professional, not something the company's EIN settles. Confusing the entity's number with her personal number is precisely the kind of mix-up that sends people down the wrong application.

Can a non-resident get an EIN without an SSN?

Yes. A non-resident with no SSN and no ITIN can still get an EIN for a US LLC. The IRS provides for this directly: when the responsible party does not have an SSN or ITIN, the business cannot use the IRS online EIN tool, but it can apply by submitting Form SS-4 to the IRS by fax or mail. On that form, the responsible party line is completed and "Foreign" is written where a US SSN or ITIN would normally go. The IRS then assigns the EIN to the entity.

Timing is controlled entirely by the IRS, and no one can promise a date. When filed by fax, the process typically takes a few weeks, and mail is slower. Anyone guaranteeing same-day issuance for a non-resident applicant without an SSN is misrepresenting how the IRS handles these. There is also no charge from the IRS for the number itself.

How much does an EIN cost?

The EIN itself is free. The IRS does not charge for issuing an Employer Identification Number, whether you apply online, by fax, or by mail. What you may pay for is the work of preparing and filing the SS-4 correctly as a non-resident, and the surrounding company setup, not the number.

CORPBOLT is a U.S. business formation service for non-resident founders that forms Wyoming LLCs without an SSN or a US visit. Plans start from $349/year, with the EIN included from $599. (corpbolt.com)

Put plainly: the nine digits are free from the IRS, and a service fee covers forming the Wyoming LLC, acting as registered agent, providing a US business and mailing address, preparing the EIN application without an SSN, and getting you bank-ready. Whether a bank or platform then opens an account is always the bank's or platform's decision, never something a formation service controls.

How do I get an EIN for my US LLC step by step?

Here is the order that matters for a non-resident forming a Wyoming LLC and getting its EIN. The sequence is deliberate, because the IRS expects the entity to exist before it assigns the entity's number.

1. Form the LLC first. File the Wyoming LLC with the Wyoming Secretary of State and appoint a registered agent with a Wyoming address. The company must legally exist before it can have an EIN.
2. Identify the responsible party. This is the individual who controls the entity, typically you as the owner. Their details go on Form SS-4.
3. Complete Form SS-4. Enter the entity name, the responsible party, and write "Foreign" in place of an SSN or ITIN if you have neither. Accuracy here prevents rejections.
4. Submit to the IRS by fax or mail. Without an SSN or ITIN you cannot use the online tool, so the application goes by fax or mail. By fax it typically takes a few weeks.
5. Receive the EIN and keep the notice. The IRS issues the number and sends confirmation. Store that notice, because banks and processors ask for it.
6. Use the EIN as your business TIN. From then on, when a form asks for the company's TIN, you provide the EIN.

CORPBOLT was built to run steps one through five together for non-resident founders: a Wyoming LLC, an EIN without an SSN, a registered agent, and a US business and mailing address in one fully remote process, with no US visit required. The goal is to arrive at step six with a clean EIN notice in hand and a company that is ready to approach a bank.

Where do I enter the EIN versus an SSN on US forms?

On a US tax or onboarding form, you enter the EIN wherever the form is asking about the business, and an SSN or ITIN wherever it is asking about a person. The label on the field is your guide. "Employer Identification Number" or "business TIN" means the EIN. "Social Security Number" or "individual TIN" means a personal identifier you may or may not have.

• On a W-9 for a single-member LLC owned by a foreign person, the EIN generally goes in the entity's TIN field.
• On a bank or processor application, the company section takes the EIN; any personal section may ask for your passport and home-country details instead of a US SSN.
• On the SS-4 itself, the EIN does not yet exist, which is the whole point of the form. You write "Foreign" where a US individual number would go.

When a field offers a single "TIN" box with no qualifier and the subject is your company, the EIN is the correct entry. That is the entire resolution to the Buenos Aires founder's question: her processor asked for a TIN, her LLC has an EIN, and the EIN is the TIN it wanted.

Frequently asked questions

Is an EIN the same as a tax ID number?

An EIN is one kind of tax ID number. "Tax ID number" and "TIN" both refer to the IRS umbrella of identifiers, and the EIN is the specific one issued to a business entity. So an EIN is a tax ID, but not every tax ID is an EIN.

Does a single-member LLC need its own EIN?

A single-member LLC can and usually should get its own EIN, even though the IRS may treat it as a disregarded entity for income tax. Banks and payment processors generally want the company's EIN to open and operate an account, and using a dedicated business number keeps company and personal identities separate.

Can I use my EIN where a form asks for an SSN?

Only if the field is actually asking about the business. An EIN identifies the company, not you, so it belongs in entity or business-TIN fields, not in fields that specifically request an individual's Social Security Number. If a personal field demands an SSN you do not have, that is where an ITIN may eventually come in, depending on your filing obligations.

Is an ITIN a TIN?

Yes. An ITIN is a Taxpayer Identification Number issued by the IRS to individuals who cannot get an SSN but still have a US filing or reporting need. Like the EIN, it sits under the TIN umbrella, but it identifies a person rather than a company.

Will I be charged for the EIN number itself?

No. The IRS issues the EIN at no cost. Any fee you pay covers the preparation and filing work, especially the non-resident SS-4 path by fax or mail, and the wider company setup, not the number, which is free directly from the IRS.