Illinois Business Name Search, Secretary of State, and LLC Costs
Illinois Articles of Organization Website:
Name Availability: https://www.ilsos.gov/corporatellc/ a preliminary check on name availability.
69 W. Washington Suite 1240
Chicago, IL 60602
Michael J. Howlett Bldg.
501 S. 2nd Street, Rm 350
Springfield, IL 62756
Questions about filing Articles of Organization: 217-524-8008 x 7736
Filing Fee: $150, plus $100 if expedited.
File online at https://apps.ilsos.gov/llcarticles/index.jsp or by mail.
For step-by-step audio instructions on how to prepare and file your Articles of Organization, check out our LLC Packages.
To return to the list of links to the information for each state: https://www.legalees.com/state-information/