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How to form an LLC in Connecticut

File a Certificate of Organization with the Connecticut Secretary of the State, Business Services Division. State filing fee $120.

Start my Connecticut LLC → Search names on the state site ↗

Due to form

$120

State filing fee

How to file

Online or by mail

Most online filings accepted automatically; paper filings are the slowest option.

Keeping it active

Annual Report

January 1 - March 31 of each year, starting the year after formation · $80

The steps in Connecticut

  1. 1

    Choose a name

    It must be distinguishable from other businesses on file and end with “Limited Liability Company”, “LLC”, “L.L.C.”. Must be distinguishable from active names on record. Reservation optional ($60). You can reserve a name first for $60 (optional).

  2. 2

    Appoint a registered agent

    Connecticut resident individual (residence address, no P.O. box) or business entity on CT record with CT business address; LLC cannot be its own agent. Agent signs acceptance. The agent must agree to serve — LLCPros prepares a consent for them to sign.

  3. 3

    File the Certificate of Organization

    File with the Connecticut Secretary of the State, Business Services Division. You can file online or by mail. Fee: $120.

  4. 4

    Sign an operating agreement

    Not filed with the state, and not required by Connecticut law, but banks and partners often ask for one. LLCPros prepares one from your answers.

  5. 5

    Get an EIN and keep up with reports

    Get a free Employer Identification Number from the IRS, open a business bank account, then file the Annual Report (january 1 - March 31 of each year, starting the year after formation).

Fees

Filing fee — Certificate of Organization$120
Optional: Expedited (online only) expedite+$50
Optional: name reservation$60
Later: Annual Report$80

Fee includes appointment of registered agent. Most online filings are accepted automatically.

State taxes to know about

No annual business entity tax for LLCs (repealed); income passes to owners.

Questions about Connecticut LLCs

›How much does it cost to form an LLC in Connecticut?

The Connecticut filing fee for the Certificate of Organization is $120. Optional expedited processing costs more.

›What document forms an LLC in Connecticut?

You file a Certificate of Organization with the Connecticut Secretary of the State, Business Services Division.

›Does Connecticut require a registered agent?

Yes. Connecticut resident individual (residence address, no P.O. box) or business entity on CT record with CT business address; LLC cannot be its own agent. Agent signs acceptance.

›Does a Connecticut LLC file an annual report?

Yes: the Annual Report, january 1 - March 31 of each year, starting the year after formation, fee $80.

Double-check with the state

We could not confirm these on an official Connecticut page when we last checked (November 12, 2026). Your filing plan lists them too.

  • Whether Connecticut accepts a formation document you prepare yourself — if not, use the state’s own form with your worksheet
  • The newspaper publication rules and deadline
  • Expedited filing options and their fees
  • Which name endings and words the state allows
  • The link to the state’s business name search
  • The state tax rules that apply to LLCs
Self-help, not legal or tax advice. LLCPros is not a law firm, does not give legal or tax advice, and is not affiliated with any state or federal agency. We prepare documents from your answers and your state’s published rules; you file them and pay the state’s fees directly. Rules and fees change — check the official state links before filing, and talk to a lawyer or accountant about your situation.