Skip to content
Filing Verdict

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

Registered agent verdict · Connecticut

3 Best Registered Agents in Connecticut (2026)

Filing Verdict's 2026 verdict on registered agents in Connecticut: CT Registered Agent.org ($99 a year), Mainstay Filing ($149 a year) and Connecticut Registered Agent.co ($99 a year), in that order. CT Registered Agent.org takes first place: a Connecticut specialist at $99 a year, with an in-state street address for the registered office.
The Filing Verdict editorial team
Our top pick in Connecticut
Spot 1

1. CT Registered Agent.org: best for the lowest yearly fee on this list

$99 per year, flat

9.3Editorial score
out of 10

CT Registered Agent.org wins here: $99 a year, flat, with served legal papers scanned and sent to you online.

CT Registered Agent.org supplies the registered office street address and scans served legal papers into your account.

Over three years it comes in under Mainstay Filing, and cost is one of our two heaviest criteria.

What you get

  • The in-state street address the state requires
  • Each legal paper served on the company is scanned into your account

What we like

  • Yearly cost of $99, unchanged when it renews
  • Cheaper per year than Mainstay Filing
  • LLC formation available, first agent year free

Cons

  • The annual report filing is yours to handle
  • Built for Connecticut; other states need a separate agent
Visit CT Registered Agent.orgPartner link. We may earn money if you buy. Our full CT Registered Agent.org verdict
One agent, every state
Spot 2

2. Mainstay Filing: best for all fifty states

$149 per year, flat

8.8Editorial score
out of 10

Second place goes to Mainstay Filing: one $149 agent plan that follows the company into every state, renewing at $149.

New company? Mainstay's formation package at $199 a year adds the Connecticut filing and the annual report.

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

What you get

  • A street address in the state, on the public record
  • Free same-business-day scans of service of process
  • The first three government mailings each year scanned free
  • Compliance reminders

What we like

  • $149 a year, unchanged at renewal
  • Serves LLCs, corporations, LPs, LLPs and nonprofits
  • Three government mailings a year scanned free
  • Same-business-day scans of served papers, free

Cons

  • The agent alone runs $50 a year above CT Registered Agent.org
  • Report filing is a formation-package feature, not part of the agent plan
Visit Mainstay FilingPartner link. We may earn money if you buy. Our full Mainstay Filing verdict
Built for Connecticut
Spot 3

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

$99 per year, flat

8.6Editorial score
out of 10

Third place goes to Connecticut Registered Agent.co: $99 a year, flat, with served legal papers scanned and sent to you online.

Connecticut Registered Agent.co supplies the registered office street address and scans served legal papers into your account.

Nothing in the published prices or features divides CT Registered Agent.org from Connecticut Registered Agent.co; pick either.

What you get

  • An in-state street address on the public record
  • Papers served on the company are scanned and posted to your online account

What we like

  • Cheaper per year than Mainstay Filing
  • LLC formation available, first agent year free
  • $99 a year, no change at renewal

Cons

  • The annual report filing is yours to handle
  • Built for Connecticut; other states need a separate agent
Visit Connecticut Registered Agent.coPartner link. We may earn money if you buy. Our full Connecticut Registered Agent.co verdict

The 3 verdicts at a glance

No.ServiceVerdict scoreYearly priceRenewalBest forVisit
1CT Registered Agent.org9.3$99$99/yrThe lowest yearly price we rank here Visit CT Registered Agent.orgPartner link. We may earn money if you buy.
2Mainstay Filing8.8$149$149/yrAn agent that works in all fifty states Visit Mainstay FilingPartner link. We may earn money if you buy.
3Connecticut Registered Agent.co8.6$99$99/yrThe lowest yearly price we rank here Visit Connecticut Registered Agent.coPartner link. We may earn money if you buy.
Scores come from Filing Verdict's editors, out of 10, using the criteria explained on How we rank; they are not customer ratings.

Connecticut registered agent prices for 2026: year one, renewals and three years

ServiceYear 1Year 2Year 3Total, 3 yearsRenewal price unchanged
CT Registered Agent.org$99$99$99$297Yes
Mainstay Filing$149$149$149$447Yes
Connecticut Registered Agent.co$99$99$99$297Yes
Prices were read from each company's own pages on November 12, 2026. Connecticut's fees do not depend on which agent you choose.

How the order was set

Two criteria lead Filing Verdict's method at 35% apiece: total over three years and paperwork the price handles. Renewal behavior, match to the state and up-front pricing share the other 30%, and Connecticut came down to total over three years.

CT Registered Agent.org totals $297 over three years, $150 under Mainstay Filing. A company that needs an agent in Connecticut only gains little from fifty-state coverage, so the lower yearly price decided it.

The full list of criteria and weights is on How we rank.

Connecticut registered agent requirements, from Connecticut Secretary of State (official)

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. Citation: Conn. Gen. Stat. § 34-243n.

Connecticut annual report: what it costs and when it is due

Every Connecticut LLC owes the annual report every year. The state fee is $80, due on or before March 31. Notices about it go to your registered agent.

Connecticut registered agent: questions answered

Must a Connecticut LLC have a registered agent?

Yes. Connecticut requires every LLC to keep a registered agent on file, and the agent needs a street address in the state.

What do Connecticut registered agents charge each year?

The prices run $99 to $149 a year, and every service keeps its price at renewal.

May I act as my own registered agent?

Only 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.

What is the due date for the Connecticut annual report?

Due on or before March 31; the state fee is $80.

Which registered agents are ranked on this page?

CT Registered Agent.org ($99 a year), Mainstay Filing ($149 a year) and Connecticut Registered Agent.co ($99 a year), from first place to last.

Which registered agent is the best value in Connecticut?

CT Registered Agent.org, because $99 a year, unchanged at renewal, and the lowest yearly price on this list.

More from us

Sources and dates

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