How to Form an LLC in Illinois
Everything you need to form a Limited Liability Company in Illinois (IL). Filing fee: $150 | Processing time: 5-10 business days (online is faster)
State Income Tax
4.95% flat individual income tax; 9.5% corporate income tax (including replacement tax)
Steps to Form an LLC in Illinois
Search for LLC name availability with the Illinois Secretary of State
Designate a registered agent with an Illinois address
File Articles of Organization with the Illinois Secretary of State
Pay the $150 filing fee
Obtain an EIN from the IRS
Draft and sign an Operating Agreement
File the annual report each year to maintain good standing
Pros of Forming in Illinois
- ✓Access to Chicago's major business and financial markets
- ✓Strong infrastructure and transportation networks
- ✓Large and diverse talent pool
Cons of Forming in Illinois
- ✗Higher combined filing and annual fees
- ✗High corporate tax rate when replacement tax is included
- ✗Complex regulatory environment in some industries
Best For
Businesses seeking access to the Midwest's largest city and its financial, tech, and manufacturing sectors.
Calculate Your Illinois LLC Costs
Get a detailed cost breakdown for forming your LLC in Illinois, including filing fees, registered agent costs, and more.
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