How to Form an LLC in Illinois
LLC, C-Corp, or S-Corp?
Choose which one is right for you.
Limiting Your Liability
Do you need liability insurance, limited liability protection, or both?
Welcome to Our Community
We're committed to publishing free informational resources such as this how-to guide. Our resources have been shared by important industry organizations including:
This guide to starting an LLC in Illinois provides step-by-step instructions on filing formation documents, obtaining tax IDs, and setting up company records.
LLCs are the most popular business structure because they are inexpensive to form, provide flexibility to the owners, and are easy to run. Forming your LLC legally establishes your business, limits your personal liability, and gains tax flexibility. The following step-by-step will help you as you undertake this process.
Fast Facts: Your Budget and Timeline
Here is an overview of the total paperwork, cost, and time it takes to form an LLC in Illinois. Be sure to read the final step in this guide - "Ongoing Filings" - to understand your ongoing costs to maintain a compliant LLC.
- Form LLC-5.5: Illinois Limited Liability Company Act Articles of Organization
- Operating Agreement
- IRS Form SS-4: Obtain an EIN
- Form REG-1: Illinois Business Registration Application
- Formation: $500 + optional $100 expedite fee
- Illinois business registration: state fee varies depending on tax accounts needed
- Formation: Immediately online. ~2 weeks by mail or fax. ~1 business days with $100 expedite fee.
Step-by-Step Illinois LLC Instructions
Illinois LLCs must pay a $250 Secretary of State annual report fee every year by the anniversary of their formation.
Check Name Availability
The legal name of your LLC may not conflict with any other registered name. Check availability of your desired name by conducting a name search.
Name Search: Illinois Secretary of State - Business Services Department
Name Reservation: Optional Suffix:
Shall contain the terms "limited liability company", "L.L.C.", or "LLC", or, if organized as a low-profit limited liability company under Section 1-26 of this Act, shall contain the term "L3C". Shall consist of letters of the English alphabet, Arabic or Roman numerals, or symbols capable of being readily reproduced by the Office of the Secretary of State; shall be the name under which the limited liability company transacts business in this State unless the limited liability company also elects to adopt an assumed name or names as provided in this Act; shall contain the word "trust", if it is a limited liability company organized for the purpose of accepting and executing trusts.
805 ILCS §180/1-10
Appoint a Registered Agent
Identify the LLC’s Illinois registered agent. This individual or company receives notice of lawsuit and other legal service for the LLC.
File Illinois Certificate of Formation
File the articles of organization to create your limited liability company.
Agency: Illinois Secretary of State - Business Services Department Form: Instructions: Filing Method:
Mail, fax (only if you have a prepaid account), or online
$150 + optional $100 expedite fee. The expedite fee is required if you file online.
~2 weeks by mail or fax. ~1 business days with $100 expedite fee.
- When you file by mail you must submit the original articles with signatures in black ink and one copy.
- In addition to a traditional LLC, Illinois offer a Series LLC and L3C. They each have special formation requirements.
- When you file online, you may return to the Secretary of State’s Web site after 24 hours and retrieve a copy of the document at no extra charge for a period of 30 days.
Establish Company Records
Your filed articles of organization are the first document for your limited liability company records. Your LLC will generate many other official records such as your operating agreement, meeting minutes, and your EIN.
Office supplies intended for an LLC will help you stay organized and save time. Membership certificate templates should come with your company record book. Each owner receives a membership certificate as evidence of his or her ownership in the LLC.
Create the Operating Agreement
Draft an Operating Agreement (potentially using a template) which is the governing document for the LLC. It defines the formalities of how the LLC will run itself such as holding an annual meeting. You will review and adopt the agreement at your organizational meeting.
Hold the Organizational Meeting
The first meeting of the members of the LLC is the organizational meeting. You will need your filed articles of organization and your operating agreement in order to conduct this meeting. Keep minutes of this meeting and store them in your company record book.
Get a Federal Employer Identification Number (EIN)
If your LLC has more than one member or will hire employees, it must obtain an EIN. An EIN is also often required to open a bank account.
Agency: Internal Revenue Service (IRS) Form: Filing Method:
Mail, phone, fax, or online.
Immediately online or by phone. 4 business days by fax. 4-5 weeks by mail.
The IRS website is only available during certain hours. Print your EIN before closing your session. For additional guidance, see IRS Pub 1635: Understanding Your EIN.
Get Illinois State Tax Identification Numbers/Accounts
Illinois offers a consolidated state tax registration application.
- Submit to:
- Illinois Department of Revenue
- Form REG-1: Illinois Business Registration Application
- Filing Method:
- Mail or online
- State fee varies depending on tax accounts needed
Consider Electing S-Corp or C-Corp Taxation
By default, your LLC receives pass-through taxation and the vast majority of LLCs keep this tax classification. Some LLCs benefit from electing S-Corp or C-Corp tax treatment:
- S-Corp treatment can help owner-employees who earn more than ~$75,000 per year save on self-employment taxes. File Form 2553: S-Corp Election.
- C-Corps suffer from double taxation: the corporation pays taxes on profits then members pay taxes on their distributions. If profits exceed $250,000 per owner, you provide employee benefits, or you will re-invest most of your profit in the business, you may benefit from the low tax rates on retained earnings under C-Corp treatment. File Form 8832: C-Corp Election.
Obtain Business Licenses & Permits
To run your business legally, you must obtain applicable licenses and permits. The easiest way to navigate the wide range of federal, state, and local requirements is to search by your business type and locality using the Small Business Administration Business License & Permit look-up tool.
- Illinois LLCs are required to file an Illinois Annual Report.
You must file federal and state tax returns. You must also file: