How to Get an EIN for Your First-Time Founder Business in Colorado (2026)

Starting your first business in Colorado is an exciting step! As a first-time founder, understanding the basics, like obtaining an Employer Identification Number (EIN), is crucial. This guide will walk you through everything you need to know about getting an EIN for your new Colorado business in 2026.

What is an EIN?

An Employer Identification Number (EIN) is essentially a Social Security number for your business. It's a unique tax ID assigned by the IRS to identify your business entity. You'll need an EIN to open a bank account, hire employees, and file taxes as a business.

How to Apply for an EIN

  1. Determine Your Eligibility: Ensure your business entity requires an EIN. Most LLCs (especially those with multiple members or those that hire employees) and corporations will need one. Sole proprietorships generally only need an EIN if they hire employees or operate as a corporation.
  2. Prepare Your Information: You'll need to provide information about your business, including its legal name, mailing address, the responsible party's name and SSN/ITIN, and the reason for applying for the EIN (e.g., starting a new business, hiring employees).
  3. Apply Online via the IRS Website: The easiest and fastest way to apply for an EIN is through the IRS website. The online application is available 24/7 and you'll typically receive your EIN immediately after submitting the application.
  4. Complete the Application Form (Form SS-4): The online application is essentially an electronic version of Form SS-4. Fill out all required fields accurately and honestly. Double-check all information before submitting.
  5. Submit Your Application: Once you've completed the application, review it carefully and submit it electronically. You'll receive a confirmation screen with your EIN.
  6. Receive and Store Your EIN: Upon successful submission, you'll receive your EIN immediately online. The IRS will also mail you an official confirmation letter (Form CP 575), which can take several weeks to arrive.

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