How to Start an LLC in Illinois

Illinois LLCs file Articles of Organization, an initial report, and annual reports. Complete step-by-step guide to forming an LLC in Illinois.

To start an LLC in Illinois, you file Articles of Organization with the Illinois Secretary of State, pay a filing fee of approximately $150, and file an initial report within 60 days of formation. Illinois also requires an annual report each year, so the compliance calendar is busier than in many states.

Here is the direct answer: Illinois LLC formation costs about $150 for the Articles of Organization filing fee, plus a $50 initial report fee due within 60 days, and processing typically takes five to seven business days. Fees change frequently, so confirm the current amounts on the Illinois Secretary of State website before you file.

Search Illinois LLC Names

Your LLC name must be distinguishable from other names on file with the Illinois Secretary of State. Use the Secretary of State's business entity search to check availability before you file. The name must include "Limited Liability Company," "LLC," or an approved abbreviation. You can reserve a name for 90 days for a small fee if you are not ready to file yet. If your first choice is unavailable, a small variation or a geographic qualifier can work, provided the final name remains distinguishable.

Appoint an Illinois Registered Agent

Every Illinois LLC must maintain a registered agent with a physical street address in Illinois. The agent accepts service of process and official mail on your behalf during business hours. You can serve as your own registered agent, or use a commercial registered agent service. Because the agent's address is public record, many owners prefer a commercial service. Read our guide to what a registered agent does for more detail.

File Articles of Organization in Illinois

File your Articles of Organization online or by mail with the Illinois Secretary of State. You will provide the LLC name, registered agent information, management structure, and the name and address of at least one organizer. Online filing is faster and gives you immediate confirmation. Mail filings take longer, so plan accordingly. You can also file by mail, but online filing is faster and lets you pay by credit card.

File the Illinois Initial Report

Within 60 days of filing your Articles of Organization, you must file an initial report with the Illinois Secretary of State. The fee is approximately $50, and you file it online. The report confirms your registered agent and principal office address. Failing to file on time triggers late fees and penalties, so mark the deadline on your calendar.

Illinois LLC Costs and Timeline

The Articles of Organization filing fee is approximately $150, and the initial report adds about $50. Processing typically takes five to seven business days, with expedited options available for an additional fee. For a full comparison of formation costs across states, see our guide to how much an LLC costs.

Ongoing Requirements: Annual Reports in Illinois

Every Illinois LLC must file an annual report by the first day of the month in which it was formed. The fee is approximately $75, and you file online through the Illinois Secretary of State website. Late filings incur additional fees, and the state can dissolve your LLC for failing to file. As of 2026, the annual report fee remains approximately $75. The state sends a reminder before the annual report deadline, but do not rely on it — mark the date on your calendar.

After your LLC is approved, also apply for an Employer Identification Number (EIN) from the IRS. It is free and takes about ten minutes online. See our guide on how to get an EIN for your LLC, then draft an operating agreement and open a dedicated business bank account.

Frequently Asked Questions

How much does it cost to start an LLC in Illinois?

Filing Articles of Organization with the Illinois Secretary of State costs approximately $150. You must also file an initial report within 60 days of formation for a $50 fee, and annual reports cost about $75. Fees change frequently, so confirm the current amounts on the Illinois Secretary of State website.

How long does it take to get an LLC in Illinois?

The Illinois Secretary of State typically processes Articles of Organization in five to seven business days. Expedited processing is available for an additional fee if you need approval sooner. Confirm current processing times on the Illinois Secretary of State website before you file.

When is the Illinois initial report due?

The initial report is due within 60 days of filing your Articles of Organization. The fee is approximately $50, and you file it online through the Illinois Secretary of State website. Failing to file on time can result in late fees and penalties.

When is the Illinois annual report due for an LLC?

The annual report is due by the first day of the month in which your LLC was formed. The fee is approximately $75, and you file online. Late filings incur additional fees, and the state can dissolve your LLC for failing to file.