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Keep it simple · Connecticut

3 Best Registered Agents in Connecticut (2026), Simply Ranked

We'd line up the registered agents in Connecticut for 2026 as CT Registered Agent.org ($99 a year), Connecticut Registered Agent.co ($99 a year) and Mainstay Filing ($149 a year), in that order. Year one costs $99 to $149; three years cost $297 to $447.
From the LLC Plainly editorial team

Quick take

Mandatory?
Required
Name in the statute
Registered agent
Service price
$99 to $149 each year
Best first
CT Registered Agent.org, Connecticut Registered Agent.co then Mainstay Filing

Connecticut: the ranking

The order comes from our five checks: three-year cost first, then how much the price covers.
Start here

1. CT Registered Agent.org: best for keeping three-year cost low

Annual price $99, renewal price $99

CT Registered Agent.org is our favorite here, because its agent service costs $99 a year and puts a street address on file for you.

It's the cheaper of the two over three years, and cost is our first check.

Your money buys

  • Your registered office address
  • Your legal mail, scanned

The good

  • Under Mainstay Filing on yearly price
  • Annual price $99; renewal price $99

Trade-offs

  • Only one state covered
  • It doesn't take the annual report off your hands
One-state pick

2. Connecticut Registered Agent.co: best for owners who like a local company

Annual price $99, renewal price $99

Connecticut Registered Agent.co takes second, because its agent service costs $99 a year and puts a street address on file for you.

CT Registered Agent.org charges the same, which makes this nearly a tie.

Your money buys

  • Your registered office address
  • Your legal mail, scanned

The good

  • Under Mainstay Filing on yearly price
  • Annual price $99; renewal price $99

Trade-offs

  • Only one state covered
  • It doesn't take the annual report off your hands
All 50 states

3. Mainstay Filing: best for owners who plan to grow

Annual price $149, renewal price $149

Number 3 is Mainstay Filing: it's $149 a year in all fifty states.

At $150 more than CT Registered Agent.org over three years, it lands lower on our list.

Your money buys

  • A real in-state address
  • Three government mailings a year scanned for free
  • Not just LLCs: corporations, LPs, LLPs and nonprofits as well

The good

  • Good wherever the LLC registers
  • Locked at $149 a year

Trade-offs

  • Runs $50 higher a year
  • It's the agent role only, with no report filing

Price check

#CompanyStart priceRenews atThree-year totalCovers
1CT Registered Agent.org$99$99/yr$297your registered office address; your legal mail, scannedSee what CT Registered Agent.org offersPartner link. We may earn money if you buy.
2Connecticut Registered Agent.co$99$99/yr$297your registered office address; your legal mail, scannedSee what Connecticut Registered Agent.co offersPartner link. We may earn money if you buy.
3Mainstay Filing$149$149/yr$447A real in-state address; three government mailings a year scanned for free; Not just LLCs: corporations, LPs, LLPs and nonprofits as wellSee what Mainstay Filing offersPartner link. We may earn money if you buy.
These are service fees only, from each company's prices on November 13, 2026. The state's fees are the same whoever you pick.

Straight answers

Do I have to name a registered agent?

Every LLC must name a registered agent with an in-state street address.

Statute: Conn. Gen. Stat. § 34-243n. cga.ct.gov · October 2026 · checked

Who is allowed to be the agent?

A Connecticut resident, or a business entity formed in Connecticut or registered there. The agent signs to accept the appointment.

An owner who meets the rule may be the agent with no charge from the state.

What will I pay an agent?

$99 to $149 a year with the services we'd use, or $297 to $447 across three years.

State fees don't move with your choice of agent.

What does the agent handle?

It's the address in Connecticut where court papers and state letters get delivered for your LLC.

What matters is that nothing important goes unnoticed while you're out. Service of process, translated

What else will the state bill each year?

Mostly the annual report, once a year, at $80. The state's due date: on or before March 31. Jot that down early.

business.ct.gov · October 2026 · checked

Why did the first pick win?

Cost across three years, worth 33%, put CT Registered Agent.org first.

33% of the score is cost across three years, 31% is work taken off your hands, and three smaller checks split ties.

CT Registered Agent.org comes out at $297 for three years, $150 below Mainstay Filing.

Our method, in full

Connecticut rules at a glance

ItemDetailsWhere we found it
The state's formation fee$120business.ct.gov · October 2026 · checked
Registered agentRequiredcga.ct.gov · October 2026 · checked
Annual report$80 every yearbusiness.ct.gov · October 2026 · checked
Three-year state total$280Our total of the lines above
The bottom row isn't a state figure. It's our total of the filing fee, the next two reports and the minimum tax, if the state has one.

Other things people ask

Can I act as my own agent?

Yes, as long as you fit the rule. Many owners still hire a service for privacy.

What's the address requirement?

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.

What does each one cost over three years?

CT Registered Agent.org will cost you $297, Connecticut Registered Agent.co will cost you $297, Mainstay Filing will cost you $447

What are the sources?

Official Connecticut sources on the state side and company pricing on the service side, all dated.

Does the state make me use a service?

Not required. What you'd pay a service is for convenience.

Who would you go with in Connecticut?

CT Registered Agent.org is on top because a company that never leaves Connecticut pays $297 for three years; Connecticut Registered Agent.co and Mainstay Filing follow.

Where we got this

  1. August 2026: confirmed Connecticut Secretary of the State using business.ct.gov
  2. August 2026: confirmed Connecticut Secretary of the State using business.ct.gov
  3. October 2026: confirmed Connecticut yearly filing: Annual report using business.ct.gov
  4. August 2026: confirmed Connecticut report due date using cga.ct.gov
  5. October 2026: confirmed Connecticut formation fee: Filing fee using business.ct.gov
  6. October 2026: confirmed Connecticut formation fee: Filing fee using business.ct.gov
  7. November 13, 2026: the CT Registered Agent.org pricing page
  8. November 13, 2026: the Connecticut Registered Agent.co pricing page
  9. November 13, 2026: the Mainstay Filing Connecticut service page