How to Get an EIN for Your Web Developer Business in Illinois (2026)

As a web developer in Illinois, you're likely building websites for clients, managing hosting, or even employing other developers. An Employer Identification Number (EIN) is crucial for your business's legal and financial operations. This guide will walk you through obtaining an EIN for your web developer business in Illinois in 2026. Simplify the process and ensure compliance with Lovie's AI-powered formation platform.

What is an EIN?

An Employer Identification Number (EIN) is a unique nine-digit tax ID assigned by the IRS to business entities. It's like a Social Security number for your business, allowing you to identify your business to the IRS and the state of Illinois. You'll need an EIN to hire employees, open a business bank account, and file business taxes.

How to Apply for an EIN

  1. Determine Your Eligibility: Ensure your web development business structure (LLC, S-corp, etc.) requires an EIN. Sole proprietorships without employees may not need one, but most web developers forming an LLC in Illinois will.
  2. Choose Your Business Structure: Decide on your business structure. Most web developers in Illinois choose an LLC for its liability protection and tax flexibility. Forming an LLC requires filing Articles of Organization with the Illinois Secretary of State and paying a $150 filing fee as of 2026.
  3. Prepare Form SS-4: Download and complete IRS Form SS-4, the Application for Employer Identification Number. You'll need to provide information about your web development business, such as its legal name, address, and the reason for applying for an EIN.
  4. 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.
  5. Receive Your EIN: Once your application is approved, you'll receive your EIN from the IRS. If you applied online, you'll receive it immediately. If you applied by fax or mail, you'll receive a confirmation letter.
  6. Notify the State of Illinois: While the EIN is a federal requirement, ensure your Illinois business records are updated with your EIN, particularly if you've formed an LLC. This might involve contacting the Illinois Department of Revenue.

Start your formation with Lovie — $20/month, everything included.