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How to Start an LLC in Illinois: A Step-by-Step

Start your Illinois business with confidence and the right support.

Forming an LLC is the best way to protect your personal assets and build credibility for your business in Illinois. This guide walks you through every step — and if you want a pro to handle the paperwork, Filing Fox is ready to help.

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Illinois LLC Costs (2025)

$150 — Articles of Organization (one-time)
$75/year — Annual Report (due before your anniversary month)
Processing time: Typically 7–10 business days online

Ready to start your LLC?

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✅ 1. Choose & Check Your LLC Name

Your name must be unique in Illinois.

Search name availability here and review Illinois naming rules.

✅ 2. Appoint a Registered Agent

Every LLC must have a Registered Agent with a physical Illinois street address (no P.O. boxes).

  • You, the owner
  • A friend or family member in Illinois
  • Professional Registered Agent service (e.g., Filing Fox)

Tip: Want privacy? Filing Fox can be your Registered Agent.

✅ 3. File Articles of Organization

File online or by mail with the Illinois Secretary of State.

  • Fee: $150
  • Typical approval: ~7–10 business days
✅ 4. Create an Operating Agreement

Not required by Illinois, but highly recommended.

Outlines ownership, management, and responsibilities. Banks often require it to open a business account.

Filing Fox provides templates for clients.

✅ 5. Get an EIN (Employer Identification Number)

Get your free EIN from the IRS website.

Needed for taxes, banking, and payroll. Filing Fox can guide you through it.

✅ 6. Register with the Illinois Department of Revenue

All LLCs must register with the Department of Revenue for state tax and business registration.

Register your LLC here (free).

After Your Illinois LLC is Approved

  • Open a business bank account
    Keep your personal and business finances separate to protect your liability shield.
  • Mark your calendar for your Annual Report
    $75/year, due before your anniversary month. Filing Fox can remind you — so you stay in good standing!
  • Stay on top of taxes & permits
    Register with the Illinois DOR and your city/county. Most LLCs use pass-through taxation by default, but check if another option saves you money.

Why Choose Filing Fox?

Starting your Illinois LLC is doable — but mistakes can cause expensive delays. Filing Fox handles the paperwork, deadlines, and compliance, so you can focus on your business.

  • Privacy-first Registered Agent
  • Deadline reminders — never miss your Annual Report
  • Personalized support from LLC experts

Ready to launch your Illinois LLC?

📧 Email us anytime at [email protected] — we’re here to help!
Start Your Illinois LLC