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Illinois . Articles of Amendment

Amend your Illinois entity's formation documents.

Illinois requires Articles of Amendment whenever you change foundational details on your formation documents. This guide explains what triggers an amendment, what doesn't, the Illinois Secretary of State fee, and how to file.

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When you need an amendment in Illinois

Amendment required
  • Entity name change
  • Authorized shares change (Corps)
  • Business purpose change
  • Member or manager structure change (Member-Managed → Manager-Managed)
  • Duration changes
Amendment NOT required
  • Address change (use Statement of Change of RA or annual report)
  • Adding or removing members (Operating Agreement only)
  • Internal management changes
  • Officer turnover (Corps - reflect in next annual report)

Illinois amendment fee

Most Illinois amendments share the standard filing fee schedule. Specific amendments may differ.

File.Business preparation fee: $99. State fees passed through at cost.

FAQ

Frequently asked questions

When do I need an Articles of Amendment in Illinois?
When changing entity name, authorized shares (Corps), business purpose, or governance structure.
How much does a Illinois amendment cost?
Fee varies by amendment type. File.Business prepares amendment for $99 + state fee.
Do I need an amendment to change my Illinois entity's address?
No. Use Statement of Change of Registered Agent or update via annual report.
Do I need an amendment to add a member to my Illinois LLC?
Only if your formation documents named members. Otherwise, update your Operating Agreement.
How long does a Illinois amendment take to process?
Standard processing varies. Expedite typically available.
Will my Illinois EIN change after an amendment?
No. EIN stays the same unless you change entity structure (LLC → Corp).
Can File.Business handle a Illinois amendment?
Yes. We prepare Articles of Amendment, file with the state, and update your Vault.

Ready to handle this the easy way?

Five minutes per filing. State fee passed through at cost. Audit trail and deadline tracking included.

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Disclosure. File.Business is a private business filing and compliance service. We are not a government agency and are not affiliated with the Illinois Secretary of State or any Secretary of State office. You may file directly with the Illinois Secretary of State. Information on this page is for general guidance only and is not legal, tax, or accounting advice. Fees and deadlines verified against the Illinois Secretary of State as of June 2026 and may change. For entity-specific guidance, consult a licensed Illinois attorney or CPA.

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File.Business is a private business filing and compliance service. We are not a government agency and are not affiliated with any Secretary of State office. You may file directly with the appropriate state agency. SOC 2 Type II audited. 220,000+ businesses formed since 2017.