How to Form an LLC in Illinois

Step-by-step guide to forming an LLC in Illinois: filing fee $150, annual costs, registered agent, and state-specific requirements.

Why form an LLC in Illinois

If you are researching how to form an LLC in Illinois, the process is straightforward and the state keeps ongoing costs low for most small businesses. The filing fee is $150 for the Articles of Organization, and the annual report costs $25. An LLC provides personal liability protection and pass-through taxation, making it one of the most popular business structures for new Illinois companies. The process takes only a few days from start to finish, and you can complete every step without a lawyer.

Step 1: Choose a business name

Your Illinois LLC name must be distinguishable from other registered names and must include "Limited Liability Company" or an approved abbreviation such as "LLC." You can search the Illinois Secretary of State database to check availability. Reserving a name costs $25 and holds it for 90 days. Avoid restricted words such as "bank" or "trust" unless you hold the appropriate license.

Step 2: Appoint a registered agent

Every Illinois LLC must have a registered agent with a physical street address in the state. The agent accepts legal documents and official mail on behalf of the business. You can serve as your own agent, but many owners use a professional registered agent service to keep their home address private and ensure documents are handled promptly.

Step 3: File the Articles of Organization

The core filing is the Articles of Organization, submitted online or by mail to the Illinois Secretary of State. The filing fee is $150. You will provide the LLC name, registered agent details, and the purpose of the business. Online filings are typically approved within a few business days. The online system is fast, and most owners complete the filing in under an hour. Once approved, your LLC legally exists and can begin operating.

Step 4: Draft an operating agreement and get an EIN

Illinois does not require an operating agreement, but it is strongly recommended. This document defines ownership percentages, voting rights, profit distribution, and management duties. A well-drafted operating agreement prevents disputes between members and strengthens liability protection. It is also useful when opening a business bank account or applying for financing.

Most Illinois LLCs also need an Employer Identification Number from the IRS, even if there are no employees. The EIN is used to open a business bank account, file taxes, and hire staff. You can apply for an EIN online at no cost through the IRS website. A business bank account keeps personal and business money separate, which is essential for preserving your liability protection.

Illinois LLC costs and ongoing requirements

The total cost to start an LLC in Illinois is $150 for the state filing, plus a $25 annual report fee. There is no annual franchise tax unless your LLC holds assets above $25 million, in which case a sliding fee applies. Keep a calendar reminder for any filing deadlines so your LLC stays in good standing with the state. Compare these figures with other states in our LLC cost by state guide, and learn more about the annual report requirement.

Frequently Asked Questions

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

The filing fee to form an LLC in Illinois is $150 for the Articles of Organization. There is also a $25 annual report fee that is due each year. Optional costs include a $25 name reservation fee and the cost of a registered agent service. There is no annual franchise tax unless your LLC holds assets above $25 million, in which case a sliding fee applies. Most owners spend between $150 and $300 in the first year.

Does Illinois require an annual report for LLCs?

Yes, Illinois LLCs must file an annual report every year. The annual report fee is $25, and it is filed online with the Illinois Secretary of State. The filing confirms your LLC name, registered agent, and principal office address. Failing to file on time can result in administrative dissolution, so it is important to track the deadline each year and keep your contact details current.

Do I need a registered agent in Illinois?

Yes, every Illinois LLC must have a registered agent with a physical street address in the state. The agent must be available during business hours to accept legal documents and official mail. You can serve as your own registered agent, but many owners use a professional registered agent service to keep their home address private and ensure documents are never missed. The agent name and address appear on the Articles of Organization.

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

Online filings with the Illinois Secretary of State are typically processed within a few business days. Mailed filings take longer, usually one to two weeks. Once the Articles of Organization are approved, your LLC legally exists. You can then apply for an EIN, open a business bank account, and begin operating. Expedited processing is available for an additional fee if you need faster approval.