3 Best LLC Services in Connecticut (2026), Answered
Who should you hire in Connecticut for LLC formation services in 2026: we say Connecticut Registered Agent.co ($199), Mainstay Filing ($199) and CT Registered Agent.org ($199), ranked best first. Connecticut takes $120 to file, and service fees run $397 to $597 over three years.
By the LLC Answered editorial team
Answer in four lines
Short reply
Price of filing
$120, a single time
In later years
$80 per year
Registered agent
Yes: the state demands it
Who to hire
Connecticut Registered Agent.co, Mainstay Filing then CT Registered Agent.org
Who to hire in Connecticut
Prices are from each company's own pricing. See how we decide.
#1Top reply
1. Connecticut Registered Agent.co: best for a lean launch
Year one $199, later years $99
Hire Connecticut Registered Agent.co in Connecticut: the opening cost is $199, first agent year included, followed by $99 annually.
It beats Mainstay Filing on three-year cost, the test we weigh most.
The annual report is not in the price, so you file it.
What is bundled
LLC filed for you
First-year agent
Pluses
$99 a year after that
$199 over the state fee
Year one of agent service is part of the price
Downsides
The annual report is yours to file
Charges $99 for the EIN application
#2Fifty states
2. Mainstay Filing: best for one price for formation and upkeep
$199 a year and $120 to the state
Why Mainstay Filing second? Simply put, a single $199 yearly price includes the formation, the registered agent and every annual report.
Over three years it costs $200 more than Connecticut Registered Agent.co, and cost carries the most weight.
It handles each annual report, adding the $80 the state sets and nothing more.
What is bundled
Your LLC, filed
Registered agent round the year
Annual report prepared and filed
EIN application
No markup on state fees
Pluses
No increase ($199)
One price, $199 a year
EIN application included
Downsides
A $100 yearly premium over Connecticut Registered Agent.co
#3Connecticut only
3. CT Registered Agent.org: best for single-state companies
Year one $199, later years $99
In third spot, CT Registered Agent.org, as the opening cost is $199, first agent year included, followed by $99 annually.
The annual report is not in the price, so you file it.
Connecticut Registered Agent.co charges the same, which makes this a near tie.
Each company's listed prices, November 13, 2026. State fees come on top and do not vary by pick.
Your questions, answered
What is the all-in cost to start one?
$120 to the state; with a service in year one, add $199.
The state collects $280 over three years, the filing fee included. source business.ct.gov (October 2026) on file
What do I send, and to whom?
The paperwork is the Certificate of Organization, and the recipient is the Connecticut Secretary of State.
Cited law: Conn. Gen. Stat. § 34-247. How fast the state works: most online filings automatically accepted. source business.ct.gov (October 2026) on file
Does this state want a registered agent?
Every LLC must name a registered agent with an in-state street address.
A Connecticut resident, or a business entity formed in Connecticut or registered there. The agent signs to accept the appointment.