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LLC Straight Talk What it costs, what you have to file, who's worth paying.

Straight talk · Connecticut

3 Best Registered Agents in Connecticut (2026): The Straight Story

For registered agents in Connecticut in 2026, we'd rank Connecticut Registered Agent.co ($99 a year), Mainstay Filing ($149 a year) and CT Registered Agent.org ($99 a year), best first. An agent runs $99 to $149 for year one and $297 to $447 for three years.
Straight from the LLC Straight Talk editorial team

Quick facts

The short of it
Do you have to?
Yes, it's the law
Statute's word
Registered agent
What agents charge
$99 to $149 a year
Our pick
Connecticut Registered Agent.co, Mainstay Filing then CT Registered Agent.org

Who we'd use in Connecticut

The order comes from our five tests: three-year cost first, then what the price covers.

#1 Who we'd call first

1. Connecticut Registered Agent.co: best for one-state businesses

Annual price $99, renewal price $99

A company that never leaves Connecticut pays $297 over three years. That's why Connecticut Registered Agent.co is first.

It beats Mainstay Filing on three-year cost, and cost is the biggest test.

What you get

  • A local address on file
  • Legal papers scanned online

Pluses

  • Smaller yearly bill than the national pick
  • Just $99 a year

What's not

  • Connecticut only
  • You'll do the annual report yourself
Check Connecticut Registered Agent.co Partner link. We may earn money if you buy.
#2 Works in all 50 states

2. Mainstay Filing: best for one price in every state

Annual price $149, renewal price $149

One account at $149 a year works in whatever state the LLC registers. That puts Mainstay Filing second.

A $150 three-year gap to Connecticut Registered Agent.co explains the lower spot.

What you get

  • An in-state street address on record
  • Scans of three government letters a year, free
  • Not only for LLCs: corporations, LPs, LLPs and nonprofits too

Pluses

  • $149 a year, flat at renewal
  • One price in all fifty states

What's not

  • $50 a year more than Connecticut Registered Agent.co
  • Report filing needs the formation package
Check Mainstay Filing Partner link. We may earn money if you buy.
#3 Connecticut specialist

3. CT Registered Agent.org: best for keeping things local

Annual price $99, renewal price $99

A company that never leaves Connecticut pays $297 over three years. That puts CT Registered Agent.org third.

Its prices match Connecticut Registered Agent.co exactly, so the order between them's a close call.

What you get

  • A local address on file
  • Legal papers scanned online

Pluses

  • Just $99 a year
  • Smaller yearly bill than the national pick

What's not

  • Connecticut only
  • You'll do the annual report yourself
Check CT Registered Agent.org Partner link. We may earn money if you buy.

The numbers

#CompanyYear oneEach year after3 yearsWhat you get
1 Connecticut Registered Agent.co $99$99/yr$297A local address on file; legal papers scanned online Check Connecticut Registered Agent.co Partner link. We may earn money if you buy.
2 Mainstay Filing $149$149/yr$447An in-state street address on record; scans of three government letters a year, free; Not only for LLCs: corporations, LPs, LLPs and nonprofits too Check Mainstay Filing Partner link. We may earn money if you buy.
3 CT Registered Agent.org $99$99/yr$297A local address on file; legal papers scanned online Check CT Registered Agent.org Partner link. We may earn money if you buy.

Service fees only, from each company's prices on November 13, 2026. State fees are the same whoever you pick.

What you need to know

Does the state make me have a registered agent?

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

The law: Conn. Gen. Stat. § 34-243n. go check cga.ct.gov, last confirmed October 2026

Who can be the agent?

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

A qualifying owner can serve for free.

What's the going rate for an agent?

You're looking at $99 to $149 a year for the services we'd use, $297 to $447 across three years.

Naming a different agent won't change any state fee.

Why does the state want one?

Court papers and state notices for your company get delivered to its Connecticut address.

Ask how fast the agent tells you when something shows up, so you don't blow a deadline. What's service of process?

What else does the state bill every year?

The annual report is the one you can't forget. It's annual and runs $80. Per the state, it's due on or before March 31.

go check business.ct.gov, last confirmed October 2026

Why this order?

Connecticut Registered Agent.co scores best on money out the door in three years, and that test is worth 35%.

Two tests carry most of the weight: money out the door in three years (35%) and jobs the price actually covers (30%).

Mainstay Filing costs $150 more over three years than Connecticut Registered Agent.co, which comes to $297.

How we judge

What Connecticut requires of an agent

RequirementThe rule or the numberCheck it
Fee to form $120go check business.ct.gov, last confirmed October 2026
Registered agent Yes, it's the lawgo check cga.ct.gov, last confirmed October 2026
Annual report $80 every yeargo check business.ct.gov, last confirmed October 2026
What the state collects in three years $280The rows above, added up

Every line above links to the state's own page. The total's ours: the filing, two reports and any minimum tax.

More questions

Can I name myself?

Yes, if your address and status match the rule. Lots of owners still pay a service to keep their address private.

What address does an agent need?

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 do the picks cost over three years?

Connecticut Registered Agent.co comes out at $297; Mainstay Filing comes out at $447; CT Registered Agent.org comes out at $297

Are the fees official?

Official Connecticut sources back the state side, and posted prices back the service side.

Do I have to use a service?

No. You can file with the state yourself. A service saves you time and can be your agent, but nothing makes you hire one.

Who should I use for a registered agent in Connecticut?

Go with Connecticut Registered Agent.co first, then look at Mainstay Filing and CT Registered Agent.org.

What's next

Sources, so you can check

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