How Much Does an LLC Cost in Illinois?

Illinois LLC formation costs $150 to file Articles of Organization with the Secretary of State under 805 ILCS 180/5-5. Annual reports cost $75 and must be filed before your LLC's anniversary month each year per 805 ILCS 180/50-1. Expedited 24-hour processing adds $100. Late filing triggers a $100 penalty after 60 days and potential administrative dissolution after 120 days of delinquency.

Initial Formation Costs

The state filing fee is $150.00 for standard processing, which takes approximately 10 business days for online filings through the Illinois Secretary of State. If you need faster processing, expedited 24-hour service costs an additional $100.00. Series LLCs cost $400.00 plus the same expedited fee if applicable.

Additional startup costs not included in filing fees: registered agent service (if using a third party, typically $75–$300 annually), EIN application (free from the IRS), and industry-specific business licenses or permits (varies by location).

Annual Compliance Costs

Every Illinois LLC must file an Annual Report before the first day of its anniversary month each year per 805 ILCS 180/50-1 and 805 ILCS 180/50-5. The annual report fee is $75.00.

Late filing penalties:

$100 penalty if filed more than 60 days late
Administrative dissolution or revocation if unfiled 120 days past the due date
$200 reinstatement fee plus all delinquent fees to restore the LLC

Tax Obligations

Illinois LLC tax costs depend on your federal tax election:

Single-member LLCs (disregarded entity) pay individual income tax at 4.95% on business income per 35 ILCS 5/
Multi-member LLCs (partnership default) owe 1.5% replacement tax on Illinois-taxable income
S-corp or C-corp elections trigger different rates

All LLCs selling taxable goods or services must register for 6.25% state sales tax before local add-ons. Estimated tax payments are due April 15, June 15, September 15, and January 15. Contact the Illinois Department of Revenue at https://tax.illinois.gov/ for tax registration and filing requirements.

Bottom Line

Total minimum startup cost: $150.00 state filing fee. Budget $75 annually for timely compliance to avoid penalties and reinstatement costs.

This is general information, not legal advice.