Form a Connecticut LLC by filing a Certificate of Organization. File its annual report during the January 1–March 31 filing window.
This guide covers forming a new Connecticut LLC. If your LLC already exists in another state or country, use the foreign-registration process instead.
Connecticut LLC at a glance
- Official filing website
- Connecticut Secretary of the State
- Business name check
- Search business namesA name search does not reserve or approve the name.
- Formation document
- Certificate of Organization
- State filing fee
- $120Formation filing only; other required costs and optional services are separate.
- Processing time
- Online2-3 business daysPaper7-10 business days; add mail transitPublished guide estimate. Published guide estimate for a complete filing; not a state guarantee. Check the filing office before setting a deadline.
- Ongoing report or tax
- Annual Report
- Report / renewal charge
- $80Fee for this filing only.
- Frequency / due date
- Annually, January 1 through March 31
- Sales tax base rate
- 6.35%July 1, 2026 snapshot; not an address-specific rate. General rate for ordinary taxable sales; exemptions, special products and local rules can change the result.Official tax agency ↗
- Names in formation records
- Management names requiredList at least one manager or member with business and residence addresses. A business-only address requires an accepted good-cause exception. Other filings and private bank/tax records may identify owners.
Before you file in Connecticut
Prepare the name, business email, office addresses, agent and at least one member or manager’s details. Choose the NAICS industry code that matches the main business activity.
File the Certificate of Organization
- Open Connecticut’s business registration service and choose a domestic LLC.
- Enter the business details, add the agent and complete the required member/manager information.
- Have the organizer sign, pay and submit. Save the approved certificate and entity reference.
What to enter in the form
- Business email
- Use an inbox the company will continue to monitor for state notices.
- Agent
- Name the individual or company that has agreed to act and complete its acceptance process.
- Member or manager
- List at least one member or manager with the business and residence addresses. Using only a business address requires the Secretary of the State to accept a good-cause exception; do not omit the residence address without that approval.
- Legal structure
- Choose LLC even if you plan to elect S-corporation tax treatment. An IRS election does not turn the entity into a state-law corporation.
After approval in Connecticut
- Set the first annual-report reminder using the report year shown in the business record. A year-end formation can have a report due soon afterward.
Annual Report
File the Connecticut annual report ↗
- Open “File annual report,” find the LLC and select the report year.
- Update or confirm the office, agent and member/manager details. Sign and pay by March 31.
- Download the accepted report. File tax returns separately with the tax agencies.
Compare the filing cycles in our annual report and recurring-fee table.
Next steps: operating agreement · get an EIN · starting checklist.
Sources and filing links
Sources checked . Confirm the state’s current fees and instructions before filing.
- Connecticut: Domestic LLC Forms and Fees
- Connecticut LLC Act: Certificate of Organization contents and address exception
Research and walkthrough references
These references provide background and filing walkthroughs. Follow current state instructions if an older walkthrough differs.
See our editorial policy for the research process and contact page for correction information.