Skip to content
State Filing Data LLC fees by state, read from the source.

Registered agent guide · Connecticut

Connecticut Registered Agent Guide (2026): Rules, Fees and the 3 Best Agents

Mainstay Filing ($149 a year), CT Registered Agent.org ($99 a year) and Connecticut Registered Agent.co ($99 a year): that is our 2026 order for registered agent service in Connecticut. A registered agent is mandatory in Connecticut; the state's own yearly charges are $80 (36th of 50).
State Filing Data research desk

Connecticut: the figures

of 50 on yearly state fees

Low rank, low state fees. See all 50

Registered agent required

Yes

October 2026: cga.ct.gov

Annual report

$80 / yr

Due: on or before March 31. October 2026: business.ct.gov

Yearly state fees

$80

Recurring, per year

Services we'd use in Connecticut

Order from our methodology: three-year service fees 35%, state filings covered 30%, then renewal, state fit and transparency.

Our first choice

1. Mainstay Filing: best for multi-state companies

Annual price $149, renewal price $149

First choice, Mainstay Filing: a $149 yearly agent plan that you can keep if the company registers in more states.

CT Registered Agent.org comes in $150 lower across three years, and we still rank coverage ahead of that gap.

What you pay for

  • Registered office address in Connecticut
  • Service of process scanned the same business day, no fee
  • First three government mailings a year scanned free
  • Works for LLCs, corporations, LPs, LLPs and nonprofits

For

  • $149 a year
  • Any state at one price

Against

  • $50 a year more than CT Registered Agent.org
  • No report filing on this plan
Visit Mainstay Filing Partner link. We may earn money if you buy.
Connecticut specialist

2. CT Registered Agent.org: best for a Connecticut-only company

Annual price $99, renewal price $99

Pick 2, CT Registered Agent.org: $99 a year flat, with served papers scanned to you online.

What you pay for

  • Registered office street address
  • Served documents scanned for you

For

  • Lower yearly cost than Mainstay Filing
  • $99 a year, same at renewal

Against

  • Single-state service
  • You file the annual report
Visit CT Registered Agent.org Partner link. We may earn money if you buy.
Connecticut specialist

3. Connecticut Registered Agent.co: best for a Connecticut specialist

Annual price $99, renewal price $99

Pick 3, Connecticut Registered Agent.co: $99 a year flat, with served papers scanned to you online.

CT Registered Agent.org and this service publish identical prices.

What you pay for

  • Registered office street address
  • Served documents scanned for you

For

  • Lower yearly cost than Mainstay Filing
  • $99 a year, same at renewal

Against

  • Single-state service
  • You file the annual report
Visit Connecticut Registered Agent.co Partner link. We may earn money if you buy.

The picks in numbers

#ServiceAnnual priceRenewal priceThree-year service fees
1 Mainstay Filing $149$149/yr$447
Visit Mainstay Filing Partner link. We may earn money if you buy.
2 CT Registered Agent.org $99$99/yr$297
Visit CT Registered Agent.org Partner link. We may earn money if you buy.
3 Connecticut Registered Agent.co $99$99/yr$297
Visit Connecticut Registered Agent.co Partner link. We may earn money if you buy.

Each company's published price, read November 12, 2026. Whichever agent you name, Connecticut charges the same.

Agent cost calculator

Years and agent in, total out. Recurring state fees only, no formation fee.

State fees $160 plus Mainstay Filing at $447: $607 over 3 years.

How Connecticut compares with nearby ranks

RankStateYearly state fees
34th Illinois$75
34th New Jersey$75
36th Connecticut$80
37th Maine$85
38th New Hampshire$100

Full ranking: Registered agent rules by state. 1st is the least expensive.

Connecticut registered agent requirements (official, 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.

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. See Conn. Gen. Stat. § 34-243n.

What Connecticut charges each year

The annual report comes every year at $80 (on or before March 31). Notices about it go to your registered agent.

How we ordered the Connecticut picks

Mainstay Filing over CT Registered Agent.org came down to state filings covered, a 30% criterion.

CT Registered Agent.org is the cheaper agent; coverage across states scored higher.

Connecticut questions answered

Does Connecticut require a registered agent?

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

Who can serve as the registered agent?

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

How much does a registered agent cost in Connecticut?

From $99 to $149 a year on this page.

What does the LLC pay the state each year?

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

Which registered agents are on this page?

Mainstay Filing ($149 a year), CT Registered Agent.org ($99 a year) and Connecticut Registered Agent.co ($99 a year), ranked in that order.

Which registered agent would you pick?

Mainstay Filing first: $149 a year here or in any other state, renewing at $149. Then CT Registered Agent.org and Connecticut Registered Agent.co.

See also

Data sources

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