3 Best LLC Services in Connecticut (2026): Prices Tracked
The best-value LLC formation services for Connecticut in 2026 are Mainstay Filing ($199), CT Registered Agent.org ($199) and Connecticut Registered Agent.co ($199), ranked in that order. Expect $397 to $597 in service fees by year three. The $120 owed to Connecticut does not depend on the provider.
Tracked by the Filing Price Watch editorial team
Ordered by:
Order = 37% cost, 29% filings covered, and three lighter measures (details)
Connecticut in numbers
Government fee to file$120business.ct.gov (pulled October 2026, noted here)
What year one costs$199Provider charges only
Three-year spend$397 to $597Renewals included
What the state collects in 3 years$280Does not vary by provider
Totals cross inNeverOrder holds through year 10
Ranked picks
Each entry shows year one, the price from year two and the three-year total. Connecticut's $120 is added to any of them.
#Ordered byPrice in year 1Price at renewalThree-year spend
1
Best value
1. Mainstay Filing: best for owners who want upkeep handled
$199 a year, renewing at the same $199
Price in year 1$199
Price after year 1$199/yr
Three-year spend$597
Mainstay Filing takes first place in Connecticut: formation, registered agent and annual report all come with $199 a year, which renews at $199.
Three years cost $200 more here than at CT Registered Agent.org, but the added filings it covers count for more in the order.
Preparing the annual report is not your job, and only the $80 state fee gets added.
Price covers
Formation handled for you
Registered agent for the full year
Annual report, filed when it is due
EIN application, prepared for you
Government fee passed along unchanged
Holds up
EIN application included
$199 the second year
$199 yearly, everything in
Weak spots
CT Registered Agent.org renews for $100 less
2
One-state service
2. CT Registered Agent.org: best for a stripped-down formation
Starts at $199; later years $99
Price in year 1$199
Price after year 1$99/yr
Three-year spend$397
CT Registered Agent.org places second. $199 to start, agent service for year one included, then $99 a year.
You file the annual report on your own.
Price covers
Articles of organization, filed
A year of agent service to begin with
Holds up
$199 on top of the state fee
First agent year included
$99 a year after that
Weak spots
The annual report is not priced in
$99 extra for the EIN
3
One-state service
3. Connecticut Registered Agent.co: best for companies rooted in the state
Starts at $199; later years $99
Price in year 1$199
Price after year 1$99/yr
Three-year spend$397
Connecticut Registered Agent.co places third. $199 to start, agent service for year one included, then $99 a year.
You file the annual report on your own.
Both the first-year and renewal prices equal CT Registered Agent.org's.
The state's share is worked out from three pieces: what it charges to file, what it charges for the next two reports, and any minimum tax. Anything without a fixed price, newspaper notices for instance, is left out of that figure.
Notes on the ranking
Mainstay Filing wins on filings covered by the price, a 29% measure, with CT Registered Agent.org close behind.
Including the annual report lifted the bundle to first place.
Need the EIN application? The lines meet in year 2, as Mainstay Filing moves past CT Registered Agent.org.
Connecticut LLC filing fee and requirements, as written by the state
The Connecticut Secretary of State accepts the Certificate of Organization with $120, under Conn. Gen. Stat. § 34-247. Every LLC must name a registered agent with an in-state street address.
No service means three years of state fees at $280. Hiring one adds $397 to $597 in the same period.
Questions and answers
How much do LLC formation services cost in Connecticut?
$199 to the service and $120 to the state.
What do these services cost over three years?
Three years of service run $397 to $597.
What does Connecticut charge to file an LLC?
$120; the filing is the Certificate of Organization.
What does Connecticut charge every year once the LLC exists?
Annual report: $80 a year, and the deadline reads on or before March 31.
Does the price include the EIN application?
Mainstay Filing, no added charge, CT Registered Agent.org, $99 and Connecticut Registered Agent.co, $99.
In what year does one service become pricier than another?
They do not cross within ten years, so no service overtakes another.
Which LLC formation service is the best value in Connecticut?
On our five measures the Connecticut order is Mainstay Filing, CT Registered Agent.org and Connecticut Registered Agent.co, with Mainstay Filing ahead on filings covered by the price.