LLC for Beginners › Connecticut
Forming an LLC in Connecticut for the first time
The Connecticut filing fee is $120. For a beginner the best service is Mainstay Filing: $199 a year covers the filing, agent, EIN application and the annual report, so year 1 comes to $319.
- Official sources, checked October 20, 2026
Your Connecticut checklist
- File the Certificate of Organization. $120 to the Connecticut Secretary of State.
- Registered agent. Every LLC must name a registered agent with an in-state street address. Mainstay Filing includes it.
- EIN. Free from the IRS; included in the application Mainstay Filing prepares.
- Operating agreement. Write one even for a single owner. No upcharge at Mainstay Filing.
- Annual report. Annual Report, every year, $80. Due: On or before March 31.
Mainstay Filing
$199 / year + $120 state fee
- LLC formation, prepared and filed
- Registered agent, all year
- EIN application (with an SSN or ITIN)
- Annual report filed every year it is due where the state requires one
- Compliance reminders and stored documents
Price from the Mainstay Filing pricing and FAQ pages, checked October 21, 2026. State fees are passed through at cost and shown before you pay.
Total for the first three years
$877 with Mainstay Filing, state fees included. Others: Northwest Registered Agent $569; ZenBusiness $777; Bizee $578; LegalZoom $1,027 (these totals leave out any charge for filing the annual report).
Questions
What is the best LLC service for a beginner in Connecticut?
Mainstay Filing. First year $319 including the $120 Connecticut filing fee; $279 in year 2.
Can a beginner file an LLC in Connecticut without a service?
Yes: file the Certificate of Organization with the Connecticut Secretary of State for $120. Required registered agent: A Connecticut resident, or a business entity formed in Connecticut or registered there. The agent signs to accept the appointment.
Sources
- Conn. Gen. Stat. § 34-247 (Formation of limited liability company; certificate of organization); fee set by § 34-243u(a)(3) (multira state research spine): www.cga.ct.gov/current/pub/chap_613a.htm, checked August 12, 2026
- Connecticut formation fee: Filing fee, official source read 2026-10-01: business.ct.gov/knowledge-base/articles/domestic-limited-liability-companies-forms-and-fees, checked October 1, 2026
- Connecticut formation fee: Filing fee, official source read 2026-10-01: business.ct.gov/-/media/businessonestop/fee-schedule-revised-712020.pdf, checked October 1, 2026
- Connecticut Secretary of the State, Business Services Division (multira state research spine): business.ct.gov/business-services/file-annual-report, checked August 12, 2026
- Connecticut Secretary of the State, Business Services Division (multira state research spine): business.ct.gov/knowledge-base/articles/annual-report/file-an-annual-report, checked August 12, 2026
- Connecticut yearly filing: Annual report: fee, official source read 2026-10-01: business.ct.gov/knowledge-base/articles/domestic-annual-report-forms-and-fees, checked October 1, 2026