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Researched and written by the Launchwise Review editorial team
Launchwise Review

Rankings of registered agents, LLC formation and foreign registration services in all 50 states.

Launch guide · Connecticut · registered agent

3 Best Registered Agents in Connecticut (2026)

Researched and written by the Launchwise Review editorial team
For a 2026 launch in Connecticut, Launchwise Review grades registered agents this way: CT Registered Agent.org ($99 a year), Connecticut Registered Agent.co ($99 a year) and Mainstay Filing ($149 a year). CT Registered Agent.org earns the top grade here: a Connecticut specialist at $99 a year, supplying an in-state street address for the registered office.
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Number one here

1. CT Registered Agent.org: best for the smallest annual bill we rank here

$99 a year, flat

Our mark 9.2 out of 10

Top grade, CT Registered Agent.org: a flat $99 a year, with scans of papers served on the company in your account.

CT Registered Agent.org handles the registered office with a state street address and scans whatever is served there for you.

On a three-year bill it comes in under Mainstay Filing, and that is a heavily weighted criterion for us.

In the price

  • The in-state address the state asks for
  • Whatever is served on the company is scanned into your account

Pros

  • Costs less per year than Mainstay Filing
  • You pay $99 a year, renewals included
  • LLC formation with year-one agent service included

Less good

  • You still file the annual report
  • Made for Connecticut; other states need their own agent
Visit CT Registered Agent.orgPartner link. We may earn money if you buy.
Read the CT Registered Agent.org launch review
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Best value here

2. Connecticut Registered Agent.co: best for Connecticut specialists

$99 a year, flat

Our mark 8.8 out of 10

Next up is Connecticut Registered Agent.co: a flat $99 a year, with scans of papers served on the company in your account.

Connecticut Registered Agent.co handles the registered office with a state street address and scans whatever is served there for you.

Nothing in the published price or features separates CT Registered Agent.org from Connecticut Registered Agent.co; go with whichever you like.

In the price

  • The in-state address the state asks for
  • Whatever is served on the company is scanned into your account

Pros

  • $99 a year, and it does not change at renewal
  • LLC formation with year-one agent service included
  • Costs less per year than Mainstay Filing

Less good

  • You still file the annual report
  • Made for Connecticut; other states need their own agent
Visit Connecticut Registered Agent.coPartner link. We may earn money if you buy.
Read the Connecticut Registered Agent.co launch review
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Best all-in coverage

3. Mainstay Filing: best for all fifty states

$149 a year, flat

Our mark 8.5 out of 10

Rounding out the list is Mainstay Filing: the price stays $149 a year if you stay put or expand, and your first three government letters each year are scanned free.

Launching a new company? The $199 yearly package also takes care of the Connecticut filing and the annual report.

CT Registered Agent.org is $150 lower across three years, which puts Mainstay Filing behind it on cost.

In the price

  • A registered office street address in any state you need
  • Free scan of served papers the same business day they arrive
  • Your first three government letters each year, scanned free
  • Compliance reminders

Pros

  • Works for LLCs, corporations, LPs, LLPs and nonprofits
  • Your first three government letters each year are scanned free
  • Papers served on the company are scanned the same business day, free
  • $149 a year and it does not rise

Less good

  • The agent plan alone costs $50 a year more than CT Registered Agent.org
  • Report filing belongs to the formation package, not the agent plan
Visit Mainstay FilingPartner link. We may earn money if you buy.
Read the Mainstay Filing launch review

The 3 grades at a glance

Place Company Launch grade Per year At renewal Best fit Go
1 CT Registered Agent.org 9.2 $99 $99/yr The lowest yearly price among the picks we rank here Visit CT Registered Agent.orgPartner link. We may earn money if you buy.
2 Connecticut Registered Agent.co 8.8 $99 $99/yr The lowest yearly price among the picks we rank here Visit Connecticut Registered Agent.coPartner link. We may earn money if you buy.
3 Mainstay Filing 8.5 $149 $149/yr An agent for every state you may enter Visit Mainstay FilingPartner link. We may earn money if you buy.
Each grade out of 10 reflects our editors' reading of the weighted criteria on How we rank, not a customer rating.

Connecticut registered agent cost in 2026: first year, renewals, three-year total

Company Year 1 Year 2 Year 3 Three years, total Renewal price matches
CT Registered Agent.org $99 $99 $99 $297 Yes
Connecticut Registered Agent.co $99 $99 $99 $297 Yes
Mainstay Filing $149 $149 $149 $447 Yes
Prices were copied from each company's own pages on November 12, 2026. Connecticut's own fees do not change with your choice of agent.

The thinking behind the order

Launchwise Review puts 26% on cost to launch and stay and 26% on launch paperwork handled, then spreads 48% over renewal behavior, state match and price transparency. For Connecticut, the call came down to cost to launch and stay.

CT Registered Agent.org comes to $297 over three years, $150 under Mainstay Filing. A launch that only needs an agent in Connecticut gets little from fifty-state reach, so the lower yearly price took it.

Every criterion and weight is listed on How we rank.

Connecticut registered agent rules, straight from Connecticut Secretary of State

Every LLC must name a registered agent with an in-state street address. 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. Law behind it: Conn. Gen. Stat. § 34-243n.

Connecticut annual report: date and fee

Put the annual report on your Connecticut calendar every year. Count on a $80 state charge, with the deadline at on or before March 31. Your registered agent receives the state's notices about it.

Quick answers about Connecticut registered agents

Do I have to line up a registered agent before launching a Connecticut LLC?

Yes. Put a registered agent with a physical Connecticut address on the paperwork, because the state will not accept an LLC without one.

What should I budget each year for a Connecticut registered agent?

Expect $99 to $149 a year, and each company keeps its price at renewal.

Could I just serve as my own registered agent?

Often yes, if you meet the state's conditions. A Connecticut resident, or a business entity formed in Connecticut or registered there. The agent signs to accept the appointment.

When does the Connecticut annual report come due?

Put on or before March 31 on your calendar. The state asks $80.

Which registered agents are graded on this page?

CT Registered Agent.org ($99 a year), Connecticut Registered Agent.co ($99 a year) and Mainstay Filing ($149 a year), top grade first.

Which Connecticut registered agent should a new company pick first?

CT Registered Agent.org, because $99 a year, with no jump at renewal, the lowest yearly price on this list.

More from us

Sources and dates

  1. Connecticut Secretary of the State, Business Services Division, dated August 2026
  2. Connecticut Secretary of the State, Business Services Division, dated August 2026
  3. Connecticut yearly filing: Annual report: fee, official source, dated October 2026
  4. Connecticut report due date, dated August 2026
  5. Connecticut formation fee: Filing fee, official source, dated October 2026
  6. Connecticut formation fee: Filing fee, official source, dated October 2026
  7. From CT Registered Agent.org: pricing and service pages, copied November 12, 2026
  8. From Connecticut Registered Agent.co: pricing and service pages, copied November 12, 2026
  9. From Mainstay Filing: Connecticut service page, copied November 12, 2026