Illinois law

Business Laws in Illinois.

Illinois business-law disputes commonly involve corporations, LLCs, governance, contracts, and commercial relationships. Illinois corporations are governed by the Business Corporation Act of 1983, Illinois LLCs follow the Illinois Limited Liability Company Act at 805 ILCS 180/, and commercial transactions follow Illinois’s UCC in 810 ILCS.

Last verified: 2026-04-17

State law

Key Illinois Statutes

Illinois Business Corporation Act of 1983805 ILCS 5/

Illinois’s business-corporation statute governs shareholder rights, director duties, derivative claims, mergers, and dissolution.

Illinois Limited Liability Company Act805 ILCS 180/

Illinois’s LLC statute governs member rights, fiduciary duties, operating agreements, dissociation, and dissolution.

Illinois Uniform Commercial Code810 ILCS

Illinois’s UCC covers sales, secured transactions, negotiable instruments, and other commercial relationships behind business disputes.

State law

Official Sources

Illinois Secretary of State — Business Services Illinois General Assembly — Compiled Statutes

Not Legal Advice

This page summarizes publicly available statutes and rules for informational purposes only. It does not constitute legal advice, and no attorney-client relationship is created by viewing this content. Laws change — always verify with the primary source or consult a licensed attorney in Illinois.

Next step

Move from state law into guided help or attorney search.

If you want help applying this information to your situation, start with guided help or browse attorneys for this issue in Illinois.

Get guided help Browse Business Law attorneys

Business Laws in Illinois.

Key Illinois Statutes

Official Sources

Not Legal Advice

Move from state law into guided help or attorney search.

Other state law topics.