Illinois

Illinois Secretary of State - Department of Business Services

Contact for business filings

Phone: 217-782-6961
Email: https://www.ilsos.gov/ContactFormsWeb/businessservices_contact.jsp
Mail filings to: Secretary of State, Department of Business Services, 501 S. Second St., Rm. 350, Springfield, IL 62756
Walk in: Springfield Office: 501 S. Second Street, Room 350, Springfield, IL Business Services walk-in, Springfield
Office: Chicago Office: 160 N. LaSalle Street, Chicago, IL 60601 Business Services walk-in, Chicago
Contact form: apps.ilsos.gov/ContactFormsWeb/businessservices_contact.jsp

Form an LLC: $150 state fee
LLC annual report: $75 state fee
Franchise tax: applies.
How you can file an LLC formation: onlineemailfaxmailwalk in
Every Illinois corporation and LLC must keep a registered agent with a street address in Illinois.

Fees are the statutory amounts on file as of 2026-08-04; the state may add processing or expedite charges.