Best LLC Filing › Connecticut
Best LLC service in Connecticut (2026)
Mainstay Filing is the best overall LLC service in Connecticut. The state fee is $120 (Certificate of Organization, filed with the Connecticut Secretary of State); with Mainstay Filing the three-year total is $877.
- Official sources, checked October 20, 2026
- Prices verified October 2026
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.
Best-for picks with Connecticut costs
- Best overall: Mainstay Filing ($597 over 3 years; $877 over 3 years with Connecticut costs). One $199 price a year covers the formation filing, registered agent, EIN application and annual report, and it stays $199 at renewal.
- Lowest first-year cost: Bizee ($0 for year 1 with an agent; $578 over 3 years with Connecticut costs). Its entry package is $0 plus the state fee and the registered agent is free for the first year when you form with it. Why
- Lowest three-year cost: Northwest Registered Agent ($289 over 3 years; $569 over 3 years with Connecticut costs). A $39 package with the agent included the first year, then a $125 agent, adds up to the smallest service total over three years. Why
- Lowest agent price after year 1: Northwest Registered Agent ($125 a year from year 2; $569 over 3 years with Connecticut costs). Its registered agent renews at the lowest rate of the five. Why
- Most included in one price: Mainstay Filing ($199 a year, all-in; $877 over 3 years with Connecticut costs). Formation, agent, EIN application and annual report filing share one yearly price; the others sell the agent, EIN or report filing separately. Why
Connecticut rules that affect your choice
- State filing fee
- $120
- Yearly report
- Annual Report, every year, $80
- Registered agent
- Required. A Connecticut resident, or a business entity formed in Connecticut or registered there. The agent signs to accept the appointment.
Questions
What is the best LLC service in Connecticut?
Mainstay Filing. In Connecticut it totals $877 over three years including the $120 filing fee, with the agent, EIN application and annual reports covered.
What is the cheapest way to start a Connecticut LLC?
Filing yourself costs the $120 state fee and you still need a registered agent with a street address in the state. Among services, Bizee is lowest in year 1 and Northwest Registered Agent over three years.
Is a service worth it in Connecticut?
Connecticut requires a registered agent, which a service provides for you. A service can also file the Annual Report each time it is due.
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