How to Get an EIN for Your Solo Founder Business in Illinois (2026)

As a solo founder in Illinois, obtaining an Employer Identification Number (EIN) might seem daunting, but it's a crucial step for your business. This guide simplifies the process for 2026, ensuring you understand the requirements and can efficiently secure your EIN. While navigating these steps alone can be challenging, Lovie streamlines the process by automating the formation and EIN application, letting you focus on building your business.

What is an EIN?

An EIN, or Employer Identification Number, is essentially a Social Security number for your business. Issued by the IRS, it's a unique tax identification number used to identify your business entity. Even as a solo founder, you'll likely need one for various business activities.

How to Apply for an EIN

  1. Determine Your Eligibility: Ensure your business structure requires an EIN. Most LLCs and corporations in Illinois will need one. Sole proprietorships generally only need an EIN if they have employees or operate under a business name.
  2. Choose Your Business Structure: Decide whether you'll operate as a sole proprietorship, LLC, or corporation. This decision impacts your EIN requirements and tax obligations in Illinois. Remember that Illinois charges $150 to form an LLC.
  3. Gather Required Information: You'll need information such as your business name, address, the responsible party's name and SSN/ITIN, and the reason for applying. Ensure all information is accurate to avoid delays.
  4. Complete the IRS Form SS-4: You can apply for an EIN online through the IRS website. The online application is the fastest and most efficient method. This application asks for detailed information about your business.
  5. Submit Your Application: Once you've completed Form SS-4, submit it electronically through the IRS website. You'll receive your EIN immediately upon successful submission.
  6. Receive Your EIN: Upon successful submission, you'll receive your EIN immediately online. Print and save this document. The IRS will also mail you an official confirmation letter (CP 575), which can take several weeks.

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