Forming an LLC in Connecticut (2026): 7 Procedures and the 3 Best LLC Services
Ranked by measured reading, the services for forming an LLC in Connecticut in 2026 are Mainstay Filing ($199), CT Registered Agent.org ($199) and Connecticut Registered Agent.co ($199). 7 procedures follow; the state's charge measures $120, and the annual report adds $80.
Cost over three years comes first, then procedures performed, renewal, Connecticut fit and price legibility (method page).
Best overall
1. Mainstay Filing: best for filing and upkeep on one invoice
$199 yearly, renewing at $199
The sheet starts with Mainstay Filing, because at $199 a year it completes three procedures (filing, registered agent, annual report) under one charge.
The premium over CT Registered Agent.org across three years is $200, which the 28% weight on procedures performed outweighs.
The owner does not file the annual report; the $80 state fee is simply passed through.
What the price performs
Formation prepared and filed
Registered agent for the full year
Annual report filed on schedule
EIN application included
State fee at cost
Measured strengths
The EIN procedure is part of the price
A flat $199 yearly
No increase at renewal ($199)
Measured limits
Its renewal is $100 higher than CT Registered Agent.org's
2. CT Registered Agent.org: best for an economical Connecticut start
Formation $199; renewal $99 a year
Reading 2 belongs to CT Registered Agent.org, because the Connecticut formation measures $199 with the agent covered in year one, and the agent renewal reads $99.
The annual report remains with the owner every year.
3. Connecticut Registered Agent.co: best for LLCs that keep to Connecticut
Formation $199; renewal $99 a year
Reading 3 belongs to Connecticut Registered Agent.co, because the Connecticut formation measures $199 with the agent covered in year one, and the agent renewal reads $99.
The annual report remains with the owner every year.
It costs exactly what CT Registered Agent.org costs.
Company prices as posted on November 13, 2026. Every row needs the $120 state fee added.
How a Connecticut LLC is formed
Procedure1
Procedure 1: Test the name for availability
Run the name search at the Connecticut Secretary of State before anything else.
TipCheck the matching web domain in the same sitting.
Procedure2
Procedure 2: Appoint 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.
The address has to be a Connecticut street address that is not a P.O. box, plus a Connecticut mailing address, which can be a P.O. box.
TipAll of the ranked services provide a registered agent.
Specimen: Observed at cga.ct.gov; entry dated October 2026
Procedure3
Procedure 3: Compare filing alone with engaging a service
Route one: pay the state $120. Route two: use one of the ranked services, pay $199 more and skip the forms.
Procedure4
Procedure 4: Assemble and file the Certificate of Organization
The Certificate of Organization is the formation instrument. It goes to the Connecticut Secretary of State, and the fee measures $120 (Conn. Gen. Stat. § 34-247). The state reports a processing time of Most online filings automatically accepted.
Specimen: Observed at business.ct.gov; entry dated October 2026
Procedure5
Procedure 5: Secure an Employer Identification Number
Sequence: state approval, then the IRS number. The yearly price at Mainstay Filing covers this application.
Procedure6
Procedure 6: Draft the operating agreement
Even a single-owner Connecticut LLC gains from a written operating agreement kept on file.
Procedure7
Procedure 7: Log the recurring deadlines
Keeping the LLC active means filing the annual report every year ($80), by on or before March 31.
Specimen: Observed at business.ct.gov; entry dated October 2026
Connecticut costs by procedure
Cost item
Goes to
Amount
Forming the LLC
State
$120
Annual report
State
$80 every year
Help from a service
The provider
$199 at the outset
State total over three years
State
$280
Filing fee plus two later reports plus any minimum tax gives the state's three-year total. The specimens below name the page behind each amount.
The reasoning behind the ranking
Procedures the price performs decided first place in Connecticut. It carries 28% of the reading, and the remainder comes from measured cost over three years, reading at year two, fit with the state protocol and price legibility.
A price that takes care of the annual report counted for more than CT Registered Agent.org's lower three-year cost.
Questions readers ask
What will a Connecticut LLC cost at the start?
$120 goes to the state. A ranked service adds $199 in year one.
Which form creates the LLC?
Locate the Certificate of Organization; the Connecticut Secretary of State is where it is filed.
Is a registered agent required?
Every LLC must name a registered agent with an in-state street address.
How long does Connecticut take to process the filing?
Allow Most online filings automatically accepted.
What does Connecticut require each year?
Log the annual report: $80, every year, on or before March 31.
Can I form the LLC without a service?
A service is optional. An owner can file with the $120 fee, provided a registered agent is appointed.
Which LLC service should a first-time founder use?
Mainstay Filing reads highest, CT Registered Agent.org and Connecticut Registered Agent.co follow; Mainstay Filing leads on procedures the price performs.