Illinois LLC Name Search

Check if your business name is available in Illinois before you file, then see Illinois's LLC naming rules, fees and filing requirements

Illinois
Filing Fee
$150
Articles of Organization
Annual Report
$75
Due before the first day of your LLC’s anniversary month each year
Name Reservation
$25
Holds a name for 90 days

How Much Does an LLC Cost in Illinois?

Filing your Articles of Organization in Illinois costs $150. After that, the annual report costs $75 a year and is due before the first day of your LLC’s anniversary month each year.

  • Articles of Organization

    When you file to form the LLC. Source →

    $150

  • Annual Report

    Due before the first day of your LLC’s anniversary month each year. You can file up to 60 days early. Source →

    $75

  • Name reservationOptional

    Holds a name for 90 days. Source →

    $25

Checked against official Illinois sources on October 23, 2026. Fees change, so confirm with the state before you file.

LLC Requirements in Illinois

Formation Requirements

Basic Requirements

  • Operating Agreement (recommended)
  • Federal Tax ID (EIN)
  • Business Licenses (if applicable)

Registered Agent

Illinois requires all LLCs to maintain a registered agent in the state.

Faster Processing

Same-day or 24-hour expedited service for Articles of Organization costs $100 extra.

Source →

Contact the Illinois Business Filing Office

Search LLC Name isn’t a government website. For an official answer about a name or a filing, contact the state office directly.

Contact Details

Address Information

Mailing Address

69 W. Washington, Suite 1240, Chicago, IL 60602

Physical Address

69 W. Washington, Suite 1240, Chicago, IL 60602

Official Illinois Resources

Illinois LLC Name Search FAQ

Enter the name in the search at the top of this page to open Illinois’s official business entity search. Search close variations too: Illinois law requires a new LLC name to be distinguishable upon the records of the Secretary of State (805 ILCS 180/1-10). A clear search is a good sign, but the state makes the final call when it reviews your filing.

It must include “Limited Liability Company” or an abbreviation such as “LLC” or “L.L.C.”. Illinois law requires a new LLC name to be distinguishable upon the records of the Secretary of State (805 ILCS 180/1-10). Words like Bank, Insurance or Trust usually need approval from another agency.

A Illinois name reservation costs $25 and holds the name for 90 days.

Filing your Articles of Organization in Illinois costs $150. After that, the annual report costs $75 a year and is due before the first day of your LLC’s anniversary month each year.

Yes, Illinois requires every LLC to keep a registered agent in the state who can receive legal documents for the business.

Illinois requires an annual report ($75), due before the first day of your LLC’s anniversary month each year. You also need to keep a registered agent in the state.

Register an assumed name with the Secretary of State. The fee is prorated to Illinois’s five-year renewal cycle, so it depends on the year you file: $120 in 2026 and $90 in 2027.

LLC Name Search in Other States