How to Form an LLC in Connecticut Yourself (2026 Costs and Steps)

Quick answer

The total state cost to file online is $120. File your Certificate of Organization with the Connecticut Secretary of the State, Business Services Division at https://business.ct.gov/knowledge-base/articles/domestic-limited-liability-companies-forms-and-fees.

Step 1: Check that your LLC name is available

Search the Connecticut Secretary of the State's business name records to ensure your desired name is available before filing.

Step 2: Choose a registered agent

A member or manager who is a Connecticut resident aged 18 or older may serve as the registered agent. The individual agent must provide a Connecticut residence address (no P.O. box), a Connecticut mailing address, and a business address (which can be "none" or a physical address without a P.O. box), and must sign accepting the appointment. The LLC itself cannot serve as its own agent.

Step 3: File your Certificate of Organization (Limited Liability Company: Domestic)

Submit the Certificate of Organization to the Connecticut Secretary of the State. The filing fee is $120 for both online and mail filings. If available, expedited service is offered at the end of the online filing process for an additional $50 per transaction; it is not available for filings by mail. Most online filings are automatically accepted, so expedite is often unnecessary.

Step 4: Create an operating agreement

Create an operating agreement to outline ownership percentages, member and manager roles, voting procedures, and what happens if a member leaves the LLC. This document governs the internal operations of your company.

Step 5: Get your EIN from the IRS

Obtain your Employer Identification Number from the IRS. This service is free. You can apply at https://www.irs.gov/ein.

Step 6: Keep your LLC in good standing

File a Limited Liability Company (LLC) Annual Report annually between January 1 and March 31. The fee for the annual report is $80, and it must be filed online via Business.CT.gov. Connecticut's former Business Entity Tax on LLCs no longer exists for tax periods beginning after December 31, 2018. No other minimum LLC tax applies.