How to Get an EIN for Your International Founder Business in Idaho (2026)

As an international founder, obtaining an Employer Identification Number (EIN) is a crucial step in establishing your business in Idaho. This guide provides a comprehensive overview of how to get an EIN for your Idaho-based company, even without a Social Security Number (SSN) or Individual Taxpayer Identification Number (ITIN). We'll cover the application process, common pitfalls, and how Lovie can streamline your formation.

What is an EIN?

An Employer Identification Number (EIN) is a unique nine-digit tax identification number assigned by the IRS to business entities operating in the United States. It's essentially a Social Security number for your company, used to identify your business for tax purposes.

How to Apply for an EIN

  1. Determine Your Eligibility: Ensure your Idaho business entity is eligible for an EIN. Generally, any entity operating a business in the US, including LLCs and corporations, needs an EIN.
  2. Complete Form SS-4: Fill out IRS Form SS-4, Application for Employer Identification Number. This form requires information about your business, such as its legal name, address, and the responsible party.
  3. Choose Your Application Method: International founders can apply for an EIN online, by mail, or by fax. The online application is the fastest method, but it requires a US taxpayer identification number (SSN or ITIN) *unless* you are applying as a foreign person.
  4. Submit Your Application: If applying online and you have an SSN/ITIN, submit Form SS-4 through the IRS website. If applying by mail, send the form to the IRS address designated for your state or, for foreign applicants, to the international address. For fax, use the designated fax number.
  5. Await EIN Assignment: If applying online with an SSN/ITIN, you will typically receive your EIN immediately. If applying by mail or fax, it may take several weeks to receive your EIN.
  6. Receive and Store Your EIN: Once your EIN is assigned, you will receive a confirmation letter from the IRS (Form CP 575). Keep this letter in a safe place, as you will need it for various business-related activities.

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