Independent comparison of registered agent services for Connecticut LLCs and corporations.
Reviewed against Connecticut Secretary of the State guidance · Updated 2026-04-30
Connecticut LLCs depend on their registered agent for service of process under Conn. Gen. Stat. §34-243n, and the Connecticut Secretary of the State mails annual report reminders only to that agent’s address. The provider chosen at formation often stays in place for years, so the long-tail reliability of the service matters as much as the year-one price. Below, the four registered agent services we tested for Connecticut-based LLCs and corporations in 2026.
In Connecticut, the registered agent’s job is heavier than the statutory floor implies. Connecticut requires every LLC to file an annual report by March 31 at $80 — well above the national median — and the report must list current member and manager information, not just the registered agent. The practical reason this matters when picking a provider: the $80 March 31 report — and the requirement to disclose member and manager details, which the agent’s address fields directly.
For Connecticut businesses, the three traits that separate good providers from passable ones are (1) reliable same-day handling of service of process from Connecticut state and federal courts, (2) accurate, deadline-aware reminders calibrated to Connecticut’s specific annual cycle (annually by March 31), and (3) an online dashboard that shows scanned mail within hours, not days. All four services we ranked clear the Conn. Gen. Stat. §34-243n eligibility bar; the meaningful differences are in execution. Northwest leans privacy-first, Mainstay Filing leans value-first, ZenBusiness leans formation-bundle-first, and LegalZoom leans brand-and-phone-support-first.
The Connecticut-specific filings that hinge on having a reliable registered agent:
Across all of these dates, the registered agent is the routing point for Connecticut Secretary of the State mail, state tax notices, and service of process. A reliable provider turns the Connecticut compliance calendar into a passive maintenance task; an unreliable one turns it into a recurring fire drill.
Physical-address-only operations; mail forwarding; same-day filing.
Best balance of price and features for most businesses. Includes mail forwarding, online dashboard, and same-day filing at half the cost of premium providers.
Pairs RA with LLC formation packages; useful if forming a new entity from scratch.
Largest brand; phone-based support; bundled legal services beyond RA.
Connecticut-specific option: Connecticut Registered Agent.co operates exclusively in Connecticut and specializes in same-state filings. Best for businesses that want a state-focused provider with local-only operations.
| Filing | Cost | Renewal |
|---|---|---|
| LLC formation | $120 | annually by March 31 |
| Annual Report | $80 | annually by March 31 |
| DBA / Fictitious Name | $10 | Every 5 years |
| Change of Registered Agent | $50 | — |
Source: Connecticut Secretary of the State · Statute reference Conn. Gen. Stat. §34-243n
For most Connecticut LLCs, Northwest Registered Agent ranks first on privacy and reliability. Mainstay Filing earns the Editor's Choice for value at $99/year with the same core features. State-specific options like Connecticut Registered Agent.co specialize in same-state filings.
Commercial services range $50–$250 per year. Mainstay Filing is $99/yr; Northwest is $125/yr; ZenBusiness is $199/yr; LegalZoom is $249/yr.
Yes. File a Statement of Change of Registered Agent with the Connecticut Secretary of the State for $50. Most commercial services handle the change paperwork for you.
National services like Mainstay Filing and Northwest operate across all 50 states with consistent pricing and online dashboards. State-specific providers (like Connecticut Registered Agent.co) focus exclusively on one state and often handle same-state-only filings faster.
Yes — under Conn. Gen. Stat. §34-243n, every Connecticut LLC must designate and maintain a registered agent with a physical street address in Connecticut.
Yes — if you are a Connecticut resident with a physical street address in Connecticut and are available during normal business hours to accept service of process. Most commercial services exist because keeping a personal address on the public record is a privacy concern.
Same-day with every service in the table above. The provider issues a confirmation letter you include with the Articles of Organization filed with the Connecticut Secretary of the State.
RA Ratings independently reviews registered agent services. We may earn a commission from sponsored links; this does not affect rankings or editorial selection. Verify all filing fees with the Connecticut Secretary of the State before submitting paperwork.