How to Get an EIN for Your Co-Founder Pair Business in Idaho (2026)

Starting a business with a co-founder in Idaho is an exciting venture! A crucial step is obtaining an Employer Identification Number (EIN) from the IRS. This guide will walk you through the process of getting an EIN for your co-founder business in Idaho in 2026. Using Lovie can streamline this and other formation steps, ensuring a smooth start for your partnership.

What is an EIN?

An Employer Identification Number (EIN) is a unique nine-digit number assigned by the IRS to business entities operating in the United States. It's essentially a Social Security number for your business. You'll need an EIN to identify your business to the IRS, file taxes, open a business bank account, and hire employees.

How to Apply for an EIN

  1. Determine Your Business Structure: Decide on the legal structure of your Idaho co-founder business. Common options include a Limited Liability Company (LLC) or a C-Corporation. LLCs are often favored for their flexibility, while C-Corps are preferred if you intend to seek significant venture capital funding.
  2. Prepare Form SS-4: Complete IRS Form SS-4, Application for Employer Identification Number. This form requires information about your business, including its name, address, responsible party (you or your co-founder), and the reason for applying for an EIN.
  3. Submit Your Application: You can apply for an EIN online through the IRS website, by fax, or by mail. The online application is the fastest and most efficient method. Fax and mail options will take significantly longer.
  4. Provide Required Information: During the application process, you'll need to provide details about your Idaho business, such as its principal activity, the number of employees you expect to hire, and the date your business was established.
  5. Verify Your Information: Carefully review all information you've entered before submitting your application. Ensure that the business name, address, and responsible party details are accurate.
  6. Receive Your EIN: If you apply online, you'll typically receive your EIN immediately after submitting the application. If you apply by fax or mail, it can take several weeks to receive your EIN.

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