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

As an international founder, establishing your business in Maine offers access to the US market. A crucial step in this process is obtaining an Employer Identification Number (EIN) from the IRS. This guide provides a roadmap for international founders to secure an EIN for their Maine-based businesses in 2026.

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 business, used to identify your company for tax purposes.

How to Apply for an EIN

  1. Determine Your Eligibility: Ensure your Maine business entity (LLC or Corporation) is legally formed before applying. You'll need the official formation documents from the Maine Secretary of State.
  2. Complete Form SS-4: Fill out IRS Form SS-4, Application for Employer Identification Number. This form requires information about your business, including its name, address, and the reason for applying for an EIN.
  3. Provide a Responsible Party: Designate a 'responsible party,' which is the individual who controls, manages, or directs the entity and the disposition of its funds and assets. This person does not need to be a US resident but must have a substantial connection to the company.
  4. Submit Your Application: You can submit Form SS-4 via mail, fax, or online. Online applications are generally the fastest method.
  5. Wait for Processing: The IRS typically processes EIN applications within a few weeks for mail or fax submissions. Online applications can receive immediate approval.
  6. Receive Your EIN: Once your application is approved, the IRS will issue your EIN. For online applications, you'll receive it immediately. For mail or fax, it will be sent to the address provided on Form SS-4.

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