The Connecticut Registered Agent (2026): 6 Procedures and the 3 Best Agents
Mainstay Filing ($149 a year), CT Registered Agent.org ($99 a year) and Connecticut Registered Agent.co ($99 a year) measured best, in that order, for appointing a registered agent in Connecticut in 2026. 6 short procedures lead from the statute to a correct agent filing.
Recorded by the Business Basics Lab staff ·
Before the procedures
Registered agent required?
YesObserved at cga.ct.gov; entry dated October 2026
Prices of ranked services
$99 to $149 a yearCompany price pages
Annual report
$80 a yearObserved at business.ct.gov; entry dated October 2026
Number of procedures
6One at a time
On this sheet
The legal requirement
Who qualifies and the address rule
Naming the agent with the state
The ranked agents
Best reading
The Connecticut results
Five weighted criteria set the order (see how we measure); three-year cost and procedures performed count most.
Best overall
1. Mainstay Filing: best for owners planning expansion
Annual price $149; renewal $149
Mainstay Filing comes first since a constant $149 a year regardless of the state of formation.
Three years run $150 higher than at CT Registered Agent.org, in exchange for more of the work being done.
What the price performs
A street address for the registered office
Papers served on the company are scanned free on the same business day
Three government letters a year are scanned at no charge
Also serves nonprofits, corporations, LPs and LLPs
Posted prices, observed November 13, 2026. State fees are the same with any agent.
The Connecticut agent, in sequence
Procedure1
Procedure 1: What Connecticut requires of an agent
Every LLC must name a registered agent with an in-state street address.
Specimen: Observed at cga.ct.gov; entry dated October 2026
Procedure2
Procedure 2: Eligible agents
A Connecticut resident, or a business entity formed in Connecticut or registered there. The agent signs to accept the appointment. Statutory basis: Conn. Gen. Stat. § 34-243n.
Procedure3
Procedure 3: Know the registered office rule
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.
TipWith a service, the record shows its address instead of the owner's.
Procedure4
Procedure 4: Act as agent or hire one
Eligible owners may name themselves, and the ranked agents charge $99 to $149 annually.
Procedure5
Procedure 5: Place the agent on the public record
On a new Connecticut LLC the agent appears in the Certificate of Organization. A later change reaches the Connecticut Secretary of State as a separate filing.
Specimen: Observed at business.ct.gov; entry dated October 2026
Procedure6
Procedure 6: Update when details change
The annual report measures $80 every year and falls due on or before March 31; notices about it are routed to the registered agent.
Specimen: Observed at business.ct.gov; entry dated October 2026
Agent and state costs
Item
Goes to
Amount
Agent service
The service
$99 to $149 a year
Each later year
The service
$99 to $149 a year
Annual report
State
$80 every year
The state's fees were read from official pages, which are listed below. Over three years they come to the filing, two reports and, in some states, a minimum tax.
Why Mainstay Filing comes first
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.
CT Registered Agent.org costs less, but coverage across states earned the higher reading.
Questions readers ask
Does Connecticut law require a registered agent for an LLC?
Yes. Every LLC must name a registered agent with an in-state street address.
Can I be my own registered agent?
Yes, when the eligibility and address tests in procedures 2 and 3 are met.
Can I change my registered agent later?
Yes; an existing LLC files a change with the Connecticut Secretary of State, as procedure 5 shows.
What does a registered agent cost in Connecticut?
The ranked agents charge $99 to $149 a year.
What does the LLC pay the state each year?
Chiefly the annual report, $80 every year.
Which registered agent would you choose?
Mainstay Filing reads highest, CT Registered Agent.org and Connecticut Registered Agent.co follow; Mainstay Filing leads on procedures the price performs.
Notebook entry for Connecticut Secretary of the State, Business Services Division: the observations rest on business.ct.gov, revisited in August 2026. Replicate the check by opening that page.
Notebook entry for Connecticut Secretary of the State, Business Services Division: the observations rest on business.ct.gov, revisited in August 2026. Replicate the check by opening that page.
Notebook entry for Connecticut yearly filing: Annual report: fee, official source: the observations rest on business.ct.gov, revisited in October 2026. Replicate the check by opening that page.
Notebook entry for Connecticut report due date: the observations rest on cga.ct.gov, revisited in August 2026. Replicate the check by opening that page.
Notebook entry for Connecticut formation fee: Filing fee, official source: the observations rest on business.ct.gov, revisited in October 2026. Replicate the check by opening that page.
Notebook entry for Connecticut formation fee: Filing fee, official source: the observations rest on business.ct.gov, revisited in October 2026. Replicate the check by opening that page.
Observation of Mainstay Filing's Connecticut service page, November 13, 2026
Observation of CT Registered Agent.org's pricing page, November 13, 2026
Observation of Connecticut Registered Agent.co's pricing page, November 13, 2026