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The EIN Application for a US LLC, Start to Finish

An EIN, or Employer Identification Number, is the nine-digit federal tax ID the Internal Revenue Service (IRS) assigns to a business, formatted as 12-3456789. For a US LLC, it is the number that lets the company file taxes, open accounts, and identify itself to vendors and platforms. This guide walks the EIN application for an LLC start to finish, with a separate path for founders who live outside the United States and have no Social Security Number.

What is the EIN application for an LLC, and where does it begin?

The EIN application for an LLC is the process of requesting that nine-digit number from the IRS using Form SS-4, the Application for Employer Identification Number. It begins after the LLC legally exists, because the IRS asks for the entity's exact legal name, formation state, and formation date, all of which come from the filing you already completed with the secretary of state.

So the order matters. Form the LLC first, then apply for the EIN. If you reverse the steps you will be guessing at details the IRS expects to match a real, registered company, and a mismatch can delay the number or cause it to be issued under the wrong name.

Here is the start-to-finish shape of a clean EIN application for an LLC:

  1. Confirm the LLC is formed and you have the approved articles of organization.
  2. Identify the responsible party, the individual who controls the entity and its funds.
  3. Complete Form SS-4 with the legal name, mailing address, entity type, and reason for applying.
  4. Submit to the IRS by the method that fits your situation (online, fax, or mail).
  5. Receive the EIN confirmation, the CP 575 notice, and store it somewhere permanent.

The number itself is free. The IRS never charges for an EIN. You may pay a service to prepare and file the paperwork correctly, but you are paying for the work, never for the digits.

What information does Form SS-4 actually ask for?

Form SS-4 asks for the identifying facts about the LLC and the person responsible for it, and getting these exactly right is the single biggest factor in a smooth EIN application. The IRS uses this form to create the entity's federal tax record, so every field should mirror what the secretary of state already has on file.

The core fields you complete are:

  • Legal name of the entity: the LLC name precisely as registered, including the suffix such as LLC.
  • Mailing address: where the IRS sends notices, which can be a US address.
  • Responsible party and their tax ID: the name of the controlling individual and, if they have one, their SSN or ITIN. This line is where non-residents differ, covered below.
  • Type of entity: you check the LLC box and state the number of members.
  • Reason for applying: usually "started a new business."
  • Closing month of the accounting year and expected employees: typically December and zero for a new single-member LLC.

A single-member LLC is treated by the IRS as a disregarded entity by default, meaning the LLC is not taxed separately and its activity flows to the owner. You still need the EIN for banking and platform verification even when the LLC is disregarded, so do not skip it because of the tax treatment.

How do non-residents file the EIN application for an LLC?

Non-residents file the same Form SS-4, but they cannot use the IRS online application, because the online tool requires the responsible party to hold a valid SSN or ITIN. A founder abroad without either of those numbers files by fax or by mail instead, and that route is fully available to people who have never set foot in the United States.

The practical mechanics for a non-resident founder are these. On the responsible party line, you enter your name and write "Foreign" in place of a US tax ID if you do not have an SSN or ITIN. You sign Form SS-4, and you send it to the IRS fax number designated for international applicants. By fax the response typically takes a few weeks, and the IRS faxes back the assigned EIN. Nobody, no agent and no service, can promise the IRS a specific date, because the timing sits entirely with the IRS.

Consider a founder in Cape Town, South Africa, building a digital product for US customers. She has a Wyoming LLC and no US tax ID. She does not need to fly to the United States, visit an embassy, or obtain an SSN first. She completes Form SS-4, writes "Foreign" on the responsible party line, faxes it to the IRS international fax number, and waits for the confirmation. That is the entire mechanism, and it is the standard route, not a workaround.

A few points that trip up first-time non-resident applicants:

  • You do not need an ITIN before you apply. The "Foreign" entry exists precisely so that founders without a US tax ID can still get an EIN.
  • The responsible party must be a real person, not the LLC itself and not a nominee. The IRS wants the individual who actually controls the entity.
  • Keep the LLC's legal name byte-for-byte consistent across the SS-4 and the formation documents. Even a missing comma can stall processing.

How do you get your EIN without an SSN?

You get an EIN without an SSN by filing Form SS-4 by fax or mail and entering "Foreign" where a US tax ID would go, which is the IRS-sanctioned path for non-resident responsible parties. The SSN is not a requirement to receive an EIN. It is only a requirement to use the faster online tool, so the absence of an SSN changes your submission channel, not your eligibility.

This is the part most founders find genuinely surprising, so it is worth restating plainly. The lack of a Social Security Number does not block you from an EIN. It simply means you take the fax or mail route that the IRS built for international applicants. If you want that work handled correctly without learning the fax procedure yourself, a formation service can prepare and file the SS-4 on your behalf.

CORPBOLT is a U.S. business formation service for non-resident founders that forms a Wyoming LLC for founders abroad and prepares the EIN, registered agent, and US address. Plans start from $349/year, with the EIN included from $599. (corpbolt.com)

What that covers, in plain terms, is forming the Wyoming LLC, preparing the EIN application so the SS-4 reflects your entity correctly, supplying a registered agent, and providing a US mailing address, all without a US visit. The EIN remains free from the IRS; the fee is for forming the company and preparing the paperwork, never for the number. Banking is handled as preparation only. A service can help you get bank-ready and organize the documents a bank or payment platform will ask for, but the bank or platform always decides whether to open the account.

What happens after the IRS issues your EIN?

After the IRS issues your EIN, it sends a confirmation document called the CP 575 notice, which states your number and the exact legal name on file, and that notice becomes your permanent proof of the EIN. You should download or store it immediately, because the IRS issues the CP 575 only once and reissuing a replacement letter, the 147C, takes additional time.

With the EIN in hand, a single-member LLC owner can generally:

  • Apply to open a US business bank account or a payment platform, where the EIN is a standard requirement.
  • Provide the number on a W-9 or W-8 form when US clients request it.
  • Set up accounting and bookkeeping under the correct federal tax ID.
  • File the relevant federal returns when due, which for many non-resident single-member LLCs includes Form 5472 with a pro-forma Form 1120.

Keep the EIN, the CP 575, and the formation documents together. Platforms, processors such as Stripe or PayPal, and banks routinely ask for the number alongside proof of the entity, and having them in one place saves repeated back-and-forth later.

What are the common mistakes that delay an EIN application for an LLC?

The most common mistake that delays an EIN application for an LLC is applying before the entity is actually formed, which leaves the SS-4 details unable to match a registered company. The second most common is a non-resident attempting the online tool, which will reject them at the SSN or ITIN step and waste time before they switch to the fax route.

Other frequent stumbles worth avoiding:

  • Listing the LLC or a company as the responsible party instead of a controlling individual.
  • Entering a legal name that does not match the formation filing character for character.
  • Assuming the EIN costs money and paying a third party for the number rather than for the filing work.
  • Expecting a guaranteed turnaround. The IRS controls timing, and the fax route typically takes a few weeks.

Slow down on the SS-4 and the rest of the EIN application for an LLC follows a predictable path. The form is short, but precision on the legal name and the responsible party is what separates a clean issuance from weeks of correction.

Frequently asked questions

Does the IRS charge a fee for an EIN?

No. The IRS issues the EIN free of charge through Form SS-4. If you use a service, you are paying for preparing and filing the application, not for the number itself.

Can I get an EIN for my LLC without a Social Security Number?

Yes. A non-resident responsible party files Form SS-4 by fax or mail and writes "Foreign" where a US tax ID would go. The SSN affects only your eligibility for the online tool, not your eligibility for the EIN.

How long does the EIN application take by fax?

By fax the IRS typically takes a few weeks to assign and return the EIN. No service can promise a specific date, because the timing is controlled entirely by the IRS.

Do I need to form the LLC before applying for the EIN?

Yes. Form the LLC with the secretary of state first, then apply for the EIN, so the SS-4 details match your registered legal name, formation state, and formation date.

What document proves my EIN was issued?

The CP 575 confirmation notice from the IRS is your proof. It states your EIN and the exact legal name on file, and it is issued only once, so store it permanently as soon as you receive it.