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Registered agent guide · Connecticut

Connecticut Registered Agent Requirements (2026): State Fees on File and the 3 Best Agents

Connecticut 2026, a registered agent: the desk ranks Mainstay Filing ($149 a year), Connecticut Registered Agent.co ($99 a year) and CT Registered Agent.org ($99 a year), in that order. Requirement: a registered agent, no exceptions for LLCs. Annual state fees total $80; rank 36th of 50.

Desk note by LLC Data Desk ·

Connecticut, the numbers

36thof fifty, yearly state costRank 1 is the smallest total. All fifty on one sheet
Registered agent required
Yescga.ct.gov [October 2026]
Annual report
$80 / yrDate set by the state: on or before March 31. business.ct.gov [October 2026]
Total owed to the state, 1 yr
$80Report for one year, plus any minimum tax

Connecticut ranking

Criteria and weights: method.

1. Mainstay Filing: best for owners who may add states

Top ranked$149 annual (renewal $149)

#1 is Mainstay Filing: $149 yearly here and everywhere else; renewal $149.

Connecticut Registered Agent.co is $150 cheaper across three years; coverage is the reason this one still ranks higher.

What the fee covers

  • Physical in-state address
  • No fee for same-business-day scanning of papers served on the company
  • Government mail: first three pieces each year scanned, no fee
  • Also open to nonprofits, corporations, LPs and LLPs

Pros

  • Flat $149/yr
  • Same fee in all fifty states

Cons

  • Costs $50 more yearly than Connecticut Registered Agent.co
  • Reports are not filed under this plan
Visit Mainstay FilingPartner link. We may earn money if you buy.

2. Connecticut Registered Agent.co: best for a small agent budget

Connecticut specialist$99 annual (renewal $99)

Then Connecticut Registered Agent.co, because Connecticut-only plan: $99 a year, $99 afterward.

What the fee covers

  • Connecticut street address as registered office
  • Served papers scanned to your account

Pros

  • $99 a year, unchanged at renewal
  • Cheaper by the year than the national pick

Cons

  • A different state needs a different agent
  • Annual report stays with you, the owner
Visit Connecticut Registered Agent.coPartner link. We may earn money if you buy.

3. CT Registered Agent.org: best for an in-state office address

Connecticut specialist$99 annual (renewal $99)

Then CT Registered Agent.org, because Connecticut-only plan: $99 a year, $99 afterward.

Prices match Connecticut Registered Agent.co's, so the two sit close.

What the fee covers

  • Connecticut street address as registered office
  • Served papers scanned to your account

Pros

  • Cheaper by the year than the national pick
  • $99 a year, unchanged at renewal

Cons

  • A different state needs a different agent
  • Annual report stays with you, the owner
Visit CT Registered Agent.orgPartner link. We may earn money if you buy.

3 services, side by side

#ServiceAnnual feeRenewal feeService fees, 3 yrs
1Mainstay Filing$149$149/yr$447Visit Mainstay FilingPartner link. We may earn money if you buy.
2Connecticut Registered Agent.co$99$99/yr$297Visit Connecticut Registered Agent.coPartner link. We may earn money if you buy.
3CT Registered Agent.org$99$99/yr$297Visit CT Registered Agent.orgPartner link. We may earn money if you buy.
Fees as posted November 12, 2026. Connecticut's own fees do not depend on the agent.

Connecticut agent cost calculator

Agent fees plus the state's recurring charges (the annual report from year two). Formation fees are left out.
With Mainstay Filing, 3 years cost $607 in all, split $160 and $447.

Connecticut next to nearby ranks

RkStateYearly state fees
34thIllinois$75
34thNew Jersey$75
36thConnecticut$80
37thMaine$85
38thNew Hampshire$100
Full table: Registered agent rules by state, smallest bills first.

Connecticut law on a registered agent

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.

Eligible: A Connecticut resident, or a business entity formed in Connecticut or registered there. The agent signs to accept the appointment. (Conn. Gen. Stat. § 34-243n)

Recurring state fees

Mail about the annual report lands with your registered agent. Cost $80 every year; on or before March 31.

Why the first pick is first

Deciding criterion for Connecticut: scope of the price, at 29%.

An agent that works in every state outscored Connecticut Registered Agent.co's lower fee.

Connecticut registered agent questions

A registered agent required for Connecticut LLCs?

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

Who can be the registered agent for Connecticut LLCs?

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

Yearly cost of registered agent service for Connecticut?

The agents here charge $99 to $149 a year.

Yearly state fees on an LLC?

$80 a year on our yearly measure: the annual report ($80 every year).

Which registered agents are ranked here?

Mainstay Filing ($149 a year), Connecticut Registered Agent.co ($99 a year) and CT Registered Agent.org ($99 a year), beginning with the top pick.

Which registered agent do you pick?

Mainstay Filing, Connecticut Registered Agent.co and CT Registered Agent.org, by rank.

Other files

Basis for this page

  1. Desk file, business.ct.gov: Connecticut Secretary of the State, Business Services Division; pulled August 2026.
  2. Desk file, business.ct.gov: Connecticut Secretary of the State, Business Services Division; pulled August 2026.
  3. Desk file, business.ct.gov: Connecticut yearly filing: Annual report: fee, official source; pulled October 2026.
  4. Desk file, cga.ct.gov: Connecticut report due date; pulled August 2026.
  5. Desk file, business.ct.gov: Connecticut formation fee: Filing fee, official source; pulled October 2026.
  6. Desk file, business.ct.gov: Connecticut formation fee: Filing fee, official source; pulled October 2026.
  7. Desk file, ilsos.gov: Illinois Secretary of State, Department of Business Services; pulled August 2026.
  8. Desk file, ilsos.gov: Illinois Secretary of State, Department of Business Services; pulled August 2026.
  9. Desk file, njportal.com: New Jersey Division of Revenue and Enterprise Services; pulled August 2026.
  10. Desk file, njportal.com: New Jersey Division of Revenue and Enterprise Services; pulled August 2026.
  11. Desk file, maine.gov: Maine Secretary of State; pulled August 2026.
  12. Desk file, maine.gov: Maine Secretary of State; pulled August 2026.
  13. Desk file, sos.nh.gov: New Hampshire Secretary of State, Corporations Division; pulled August 2026.
  14. Desk file, sos.nh.gov: New Hampshire Secretary of State, Corporations Division; pulled August 2026.
  15. Mainstay Filing, Connecticut service page: pulled from the company site November 12, 2026
  16. Connecticut Registered Agent.co, pricing page: pulled from the company site November 12, 2026
  17. CT Registered Agent.org, pricing page: pulled from the company site November 12, 2026