Illinois LLC Guide (2026)
Everything you need to form and maintain an LLC in Illinois — state-specific fees, deadlines, and step-by-step instructions.
This hub indexes all Illinois LLC guides in one place — formation, compliance, registered agents, and business structure comparisons. Quick reference: state filing fee $150, standard processing 10 business days, annual report due Anniversary month. For the complete step-by-step formation walkthrough, see the Full Formation Guide below.
322,415 businesses operate in Illinois (2023)
Illinois has 322,415 active business establishments — up 0% year over year. This reflects the state's overall business environment and the competitive market new LLC owners are entering.
Source: Census CBP 2023
Enterprise LLCs Formed in Illinois
| Entity Name | Why They Chose Illinois |
|---|---|
| United Airlines, LLC | Illinois home-state formation gives Chicago-headquartered United Airlines a consolidated structure for its O'Hare hub operations, with Illinois law governing its ground service and cargo handling subsidiary agreements. |
| McDonald's USA, LLC | Illinois's robust franchise law requires in-state registration for franchise disclosure documents, and McDonald's Chicago headquarters uses Illinois LLCs to standardize domestic franchisee licensing agreements. |
Why Illinois attracts enterprise LLCs: Illinois is the Midwest's financial and logistics capital — its Illinois LLC Act provides flexible operating agreements and its Cook County commercial court system offers sophisticated dispute resolution for multi-state franchise and supply chain operating entities.
Entity examples are illustrative and based on publicly available corporate registrations. Reasons reflect general state-level legal and tax advantages — not verified statements of each company's formation rationale. For educational purposes only; consult a licensed attorney before making formation decisions.
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How Do You Start an LLC in Illinois?
Filing in Illinois costs $150 in state fees with 10-business-day standard processing. You'll file Articles of Organization, appoint a registered agent, and complete any state-specific requirements before opening for business.
Full Formation Guide for IllinoisExact forms, fees & filing instructionsWhat Are the Ongoing Requirements for a Illinois LLC?
Illinois LLCs must file an annual report due Anniversary month and keep a registered agent on file year-round. Missing deadlines triggers late fees and risks administrative dissolution.
How Do You Register a Foreign LLC in Illinois?
If your LLC was formed in another state (Delaware, Wyoming, etc.) but conducts business in Illinois, you must register as a foreign LLC. This requires a separate filing fee and a registered agent in Illinois.
Illinois Foreign LLC Registration GuideForms, fees & registered agent requirementsDoes a Illinois LLC Need a Registered Agent?
Other Illinois LLC Compliance & Tax Guides
How Does a Illinois LLC Compare to Other Structures?
Illinois LLC Operating Agreement Templates
Illinois LLC Guides by Industry
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- LLC for General Contractors in Illinois (2026): Complete Guide
- LLC for Dentists & Dental Practices in Illinois (2026): Complete Guide
- LLC for eCommerce & Dropshippers in Illinois (2026): Complete Guide
- LLC for Etsy Sellers in Illinois (2026): Complete Guide
- LLC for Freelancers in Illinois: Is It Worth It? (2026)
- LLC for Insurance Agents in Illinois (2026): Complete Guide
- LLC for Landscaping Business Owners in Illinois (2026): Complete Guide
- LLC for Attorneys in Private Practice in Illinois (2026): Complete Guide
- LLC for Musicians & Entertainers in Illinois (2026): Complete Guide
- LLC for Nurse Practitioners in Illinois (2026): Complete Guide
- LLC for Personal Trainers in Illinois (2026): Complete Guide
- LLC for Photographers in Illinois (2026): Complete Guide
- LLC for Plumbers & Electricians in Illinois (2026): Complete Guide
- LLC for Real Estate Investors in Illinois (2026): Complete Guide
- LLC for Software Developers & IT Consultants in Illinois (2026): Complete Guide
- LLC for Therapists & Counselors in Illinois (2026): Complete Guide
- LLC for Owner-Operator Truckers in Illinois (2026): Complete Guide
- LLC for Content Creators & YouTubers in Illinois (2026): Complete Guide
How Do You Dissolve an LLC in Illinois?
More Illinois LLC Resources
Edmond Hui · Founder, MyStateLLC
Edmond Hui is a software engineer and serial entrepreneur based in New York who has founded multiple online businesses across e-commerce, media, and information publishing. Before transitioning into tech, he spent years as a commercial real estate professional closing deals totaling over 100,000 square feet, giving him firsthand experience with business formation and entity structuring. He built MyStateLLC to provide the free, state-specific LLC guidance he wished existed when forming his own companies.