Illinois LLC Requirements

Each state has different requirements for forming a limited liability company (LLC). Whether you are starting a business or incorporating a business already in existence, you'll want to understand the state requirements for LLC formation.

Cost to form an Illinois LLC

At BizFilings, we clearly outline our fees and the Illinois state fees. When you view our pricing to form an LLC you plainly see:

  • BizFilings’ package prices. BizFilings offers three incorporation service packages from which you can choose.
  • State fee for standard turn-around. Our pricing clearly shows the state fee to form an LLC in Illinois with standard turn-around.
  • Expedited turn-around. You will see the BizFilings and state fee, if any, for expedited turn-around.
  • Certified copy. Our pricing also clearly displays the BizFilings and state fee, if any, for issuing a Certified Copy of the Articles of Organization.

Form an Illinois LLC

Illinois LLC name requirement

The LLC name must end with "Limited Liability Company," "LLC" or "L.L.C." Use of dashes in a name often is not approved by the state. The name must be distinguishable from the name of any domestic or foreign LLC authorized to transact business or a name to which exclusive right is, at the time, reserved or registered. Words such as "Bank" or "Trust" and variations thereof require approval from the Department of Banks and Trusts.

Member/Manager information

The following are Illinois’s requirements for the members/managers of LLCs:

  • Minimum number. LLCs must have one or more members/managers.
  • Residence requirements. Illinois does not have a provision specifying where directors must reside.
  • Age requirements. Illinois does not have age requirements.
  • Inclusion in the Articles of Organization. Member/Manager names and addresses are required to be listed in the Articles of Organization.

Requirements for the Articles of Organization

The document required to form an LLC in Illinois is called the Articles of Organization. The information required in the formation document varies by state. The requirements in Illinois include:

  • Registered agent. LLCs must list the name and address of a registered agent with a physical address (no post office boxes) in Illinois. The registered agent must be available during normal business hours to accept important legal and tax documents for the business.
Illinois Registered Agent Service

Professional services businesses

Illinois does not allow professionals, such as accountants, attorneys and physicians to form a professional limited liability company (PLLC).

After forming a limited liability company (LLC) , you must undertake certain steps on an ongoing basis to keep your business in compliance. These steps are also important in preserving the limited liability an LLC provides its owner(s). This guide outlines the ongoing requirements for Illinois LLCs.

Illinois LLC taxes and fees

The following are taxation requirements and ongoing fees for Illinois LLCs:

  • Annual report. Illinois requires LLCs to file an annual report during the 60-day period before the first day of the anniversary month of the incorporation date. The annual report fee is $250.
  • Taxes. For complete details on state taxes for Illinois LLCs, visit Business Owner's Toolkit or the State of Illinois .
  • Federal tax identification number (EIN). An EIN is required for LLCs that will have employees. Additionally, most banks require an EIN in order to open a business bank account.
  • State tax identification number. Illinois requires a state tax identification number.

Business licenses in Illinois

Business licenses and/or permits are required for most businesses. The BizFilings Business License Application Package can help you stay on top of these requirements.

Additional Illinois information

View the following additional resources BizFilings has for forming and maintaining companies in Illinois:

State Guides


The state in which you form your company can provide certain benefits.

Please select both a state and a topic.

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