Disclaimer: We are a private service provider and are NOT affiliated with the Internal Revenue Service (IRS). You can apply for an Employer Identification Number (EIN) directly for FREE on the official IRS website. We charge a fee for assistance, document preparation, and expedited processing services.

Unlocking the Mystery: Your Guide to Getting an EIN Number in Illinois

Business Launch

Unlocking the Mystery: Your Guide to Getting an EIN Number in Illinois

Thinking about launching a business or hiring employees in Illinois? One of the first steps on your entrepreneurial journey is obtaining an Employer Identification Number (EIN). Whether you’re starting a restaurant in Chicago, an online shop in Peoria, or a consulting firm in Springfield, having an EIN is essential for tax filing, banking, and more. But how exactly do you get an EIN number in Illinois, and what should you know about the process here? Let’s walk through it together.

What Is an EIN and Why Is It Important for Illinois Businesses?

An Employer Identification Number (EIN), sometimes called a Federal Tax ID Number, is a unique nine-digit number assigned by the IRS. Think of it as a Social Security Number for your business. You’ll need an EIN to open a business bank account, file federal taxes, hire employees, and apply for business licenses in Illinois. Even if you’re operating a single-member LLC or a partnership, an EIN is often required—and always useful.

Doing Business in Illinois: The Local Perspective

Illinois is home to a vibrant, diverse business community—from bustling Chicago tech startups to family-owned farms in rural counties. The state offers a supportive environment for entrepreneurs, but you’ll find certain requirements unique to Illinois. For example, some banks and local agencies require proof of your EIN before you can open business accounts or apply for certain licenses. Additionally, Illinois businesses must comply with both federal and state tax regulations, making an EIN a crucial part of your compliance toolkit.

Who Needs an EIN in Illinois?

Not every business in Illinois is required to get an EIN, but most do. Here’s a look at common scenarios where you’ll need one:

  • You plan to hire employees (even just one!) in Illinois.
  • Your business is structured as a partnership, corporation, multi-member LLC, or nonprofit.
  • You want to open a business checking account.
  • You need to apply for business licenses or state tax accounts.
  • You’re changing your business structure (for example, from sole proprietorship to LLC).

Even sole proprietors in Illinois often get an EIN to keep personal and business finances separate and add credibility when working with clients or vendors.

How to Get an EIN Number in Illinois: Step-by-Step Process

Ready to get an EIN number? Illinois business owners can follow these steps to secure their federal tax ID:

  1. Determine Your Eligibility: You must have a business located in the U.S. or U.S. territories, and the responsible party must have a valid Social Security Number (SSN) or Individual Taxpayer Identification Number (ITIN).
  2. Gather Required Details: Collect information such as your legal business name, mailing address, type of entity, and the name/SSN of the responsible party.
  3. Apply Online or By Other Methods:
    • Online: The fastest way is through the official IRS EIN application portal. Note: The IRS site is only available during certain hours.
    • Fax or Mail: You can submit Form SS-4 to the IRS via fax or mail, but processing times are longer.
    • Third-Party Services: For extra guidance, some choose a paid service to simplify and review the application process.
  4. Receive Your EIN: If you apply online, you’ll get your EIN immediately. Fax or mail applications may take days or weeks.
  5. Keep Your EIN Safe: Store your EIN notice in a secure place. You’ll need it for tax filings, business banking, and Illinois state registrations.

Avoiding Pitfalls: Tips for a Smooth EIN Application in Illinois

  • Double-check your business name: Make sure your legal business name matches your Illinois registration to avoid delays.
  • Use accurate addresses: If your business has an Illinois street address, use it rather than a P.O. box for added credibility.
  • Don’t apply too early: Wait until your Illinois business entity is officially formed to avoid issues with mismatched records.
  • Watch out for duplicate applications: Only apply once; duplicate EINs can create headaches with the IRS and state agencies.

Frequently Asked Questions About Getting an EIN in Illinois


If you apply for your EIN online through the IRS, you’ll receive your number immediately after completing the application. Faxed applications typically take about 4 business days, while mailed forms can take up to four weeks. Using a paid service may help you avoid common errors and streamline the process, but the IRS processing times still apply.


You have options! You can apply directly through the official IRS website at no charge. Alternatively, we offer a paid service that simplifies the process for Illinois businesses. Our service includes step-by-step guidance, application review, help with resolving common submission issues, customer support, and order status tracking. The choice is yours based on your comfort and needs.


Most Illinois LLCs, even single-member ones, choose to get an EIN. It’s often required for opening a business bank account, applying for state licenses, or separating personal and business finances. If your LLC has more than one member, or you plan to hire employees, an EIN is required by law.

Ready to Take the Next Step?

Securing an EIN is a foundational task for any Illinois business owner, from Lake Michigan’s shores to the farmlands of the south. Whether you’re looking to hire, open a bank account, or simply legitimize your business, getting an EIN number in Illinois is straightforward when you know the steps. Take the next step confidently and set your Illinois business up for success!