Starting a Business

How do I register an LLC?

Illinois Operational Guidance

Published May 7, 2026 Updated May 20, 2026 State-specific operational guidance Update This Question
Operational Review Team

This operational guidance was reviewed by the 70 / 30 Business Operations Intelligence Team, specializing in business operations, payroll compliance, workforce automation, licensing, and multi-state operational requirements.

This question has been updated using current operational guidance.

How to Register an LLC in Illinois

Registering a Limited Liability Company (LLC) in Illinois involves several practical steps to ensure compliance with state requirements and smooth business operations.

Step-by-Step Process

  • Choose a Name for Your LLC: The name must be unique and include “Limited Liability Company,” “LLC,” or “L.L.C.” Verify name availability through the Illinois Secretary of State website.
  • Designate a Registered Agent: Your LLC must have a registered agent with a physical address in Illinois who can receive legal documents on behalf of the business.
  • File Articles of Organization: Submit the Articles of Organization (Form LLC-5.5) to the Illinois Secretary of State online or by mail. This document officially creates your LLC.
  • Pay the Filing Fee: As of 2026, the filing fee for Articles of Organization is $150. Payment can be made online or by check if filing by mail.
  • Create an Operating Agreement: While not required by Illinois law, drafting an operating agreement is operationally important. It outlines management structure, roles, and ownership percentages.
  • Obtain an EIN: Apply for an Employer Identification Number (EIN) from the IRS. This is necessary for tax reporting, payroll, and opening a business bank account.
  • Register for State Taxes: Depending on your business activities, register with the Illinois Department of Revenue for sales tax, withholding tax, or other applicable taxes.
  • Comply with Local Licenses and Permits: Check with your city or county government for required business licenses, permits, or zoning clearances.

Additional Operational Considerations

  • Annual Report Filing: Illinois LLCs must file an annual report each year by the anniversary date of formation. The fee is $75 as of 2026.
  • Recordkeeping: Maintain accurate records of business activities, member meetings, and financial transactions to support compliance and bookkeeping.
  • Employee Classification and Payroll: If hiring employees, ensure proper classification, register for Illinois payroll taxes, and comply with wage and hour laws.
  • Insurance: Consider general liability insurance and, if hiring, workers’ compensation insurance as operational protections.
  • Automation Tools: Use business management software to streamline compliance tasks like tax filings, payroll processing, and recordkeeping.

Following these steps will establish your LLC in Illinois with a strong operational foundation, enabling compliance with state requirements and efficient business management.

Operational References

Operational guidance may vary by state, industry, licensing requirements, workforce regulations, and tax law updates. Businesses should verify compliance, payroll, licensing, and tax requirements directly with official agencies and qualified advisors.

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