How do I apply for an EIN?

How to Apply for an EIN in Illinois

An Employer Identification Number (EIN) is essential for most businesses operating in Illinois. It is used for tax reporting, hiring employees, and opening business bank accounts.

Steps to Apply for an EIN

• Determine Eligibility: Your business must be located in the United States or U.S. territories to apply for an EIN online.
• Gather Required Information: Prepare your legal business name, address, type of entity, and Social Security Number (SSN) or Individual Taxpayer Identification Number (ITIN) of the responsible party.
• Apply Online: Visit the IRS EIN application website to complete the application. This is the fastest and most efficient method.
• Apply by Fax or Mail: Alternatively, you can complete Form SS-4 and fax or mail it to the IRS. Processing times are longer compared to online applications.
• Receive EIN: Once approved, you will receive your EIN immediately online or within several days by fax or mail.

Operational Considerations After Obtaining an EIN

• Register with Illinois Department of Revenue: Use your EIN to register for state taxes, including sales tax and withholding tax.
• Set Up Payroll: Your EIN is required for reporting employee wages and payroll taxes.
• Maintain Accurate Records: Keep a copy of your EIN confirmation for bookkeeping and compliance purposes.
• Update Business Registration: Include your EIN when filing annual reports or updating your business status with Illinois Secretary of State.

As of 2026, applying for an EIN remains a straightforward process that supports various operational needs including tax compliance, hiring, and banking for Illinois businesses.