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Illinois LLC formation

The requirements, the timing and the official sources. Everything we’ve verified, in one place.

Sources verifiedLast verified 2026-10-25
Visit the official agencyReview the sources

Formation documents, fees and filing

Name

Articles of Organization

View official source

Fee

$150

View official source

Expedited filing options

Service: 24-hour service for an ordinary LLC; Total filing fee: $250

View official source

Official filing portal

Official portal

View official source

Name

Articles of Organization

Verified 2026-10-25 — source and quotation
Your Articles of Organization may need to include additional items that specifically apply to your situation.
Official source

Fee

$150

Verified 2026-10-25 — source and quotation
Articles of Organization $150 (10 business days); $250 (24-hour service)
Official source

Expedited filing options

Service: 24-hour service for an ordinary LLC; Total filing fee: $250

Verified 2026-10-25 — source and quotation
Articles of Organization $150 (10 business days); $250 (24-hour service)
Official source

Official filing portal

Open the official agency page

Verified 2026-10-25 — source and quotation
File Articles of Organization
Official source

Publication requirements

Not verified yet

Fee notes

A payment processor fee is assessed for online transactions; the ordinary-LLC fee excludes the separate series-LLC schedule.

Verified 2026-10-25 — source and quotation
A payment processor fee will be assessed for all transactions. Articles of Organization for an LLC able to establish a series $400 (10 business days); $500 (24-hour service)
Official source
Confirm with the official agency
Official sources and verification (5)

Last verified 2026-10-25. Each quotation supports the corresponding published value.

Name
Your Articles of Organization may need to include additional items that specifically apply to your situation.
Official source

Verified 2026-10-25

Fee
Articles of Organization $150 (10 business days); $250 (24-hour service)
Official source

Verified 2026-10-25

Expedited filing options
Articles of Organization $150 (10 business days); $250 (24-hour service)
Official source

Verified 2026-10-25

Fee notes
A payment processor fee will be assessed for all transactions. Articles of Organization for an LLC able to establish a series $400 (10 business days); $500 (24-hour service)
Official source

Verified 2026-10-25

Official filing portal
File Articles of Organization
Official source

Verified 2026-10-25

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Last verified 2026-10-25.

Official sources (1)

Not legal or tax advice. Confirm with the official agency before filing.