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Formation Scorecard

Registered agent scorecard · Connecticut

3 Best Registered Agents in Connecticut (2026)

On the Formation Scorecard 2026 scorecard for registered agents in Connecticut the order reads CT Registered Agent.org ($99 a year), Mainstay Filing ($149 a year) and Connecticut Registered Agent.co ($99 a year). CT Registered Agent.org posts the top score: $99 a year, steady at renewal, and the lowest yearly price on this list.
Researched and written by the Formation Scorecard editorial team
Rank #1 Our top pick

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

9.5 Editor score out of 10
$99 a year, no change on renewal

CT Registered Agent.org leads the card: a Connecticut specialist at $99 a year that supplies an in-state registered office street address.

CT Registered Agent.org puts a street address in the state on record for the company and scans served papers into your account.

Across three years it costs less than Mainstay Filing, and cost is one of our two heaviest criteria.

What you get

  • A physical address in the state for the registered office
  • Online scans of each legal paper served on the company

Strengths

  • Yearly price below Mainstay Filing's
  • A $99 plan with a flat renewal
  • Offers formation with a free first agent year

Watch for

  • You file the annual report yourself
  • Limited to Connecticut; other states need another agent
Visit CT Registered Agent.orgPartner link. We may earn money if you buy. CT Registered Agent.org: the full write-up
Rank #2 Best all-in coverage

2. Mainstay Filing: best for every state

9.0 Editor score out of 10
$149 a year, no change on renewal

Mainstay Filing takes second spot: a $149 agent plan that travels to any state, renewing at $149.

Not formed yet? Mainstay's $199-a-year formation package covers the Connecticut filing along with the annual report.

CT Registered Agent.org undercuts Mainstay Filing by $150 over three years, and that gap costs Mainstay points on cost.

What you get

  • An in-state street address on the public record
  • No-cost scan and upload of served papers within the same business day
  • The first three government mailings each year scanned at no cost
  • Compliance reminders

Strengths

  • Served papers scanned on the day they arrive, free
  • $149 a year with no renewal step-up
  • First three government mailings each year scanned free
  • Fits LLCs, corporations, LPs, LLPs and nonprofits

Watch for

  • Agent service alone costs $50 a year more than CT Registered Agent.org
  • Reports are filed only under the formation package
Visit Mainstay FilingPartner link. We may earn money if you buy. Mainstay Filing: the full write-up
Rank #3 Local Connecticut agent

3. Connecticut Registered Agent.co: best for Connecticut-based companies

8.7 Editor score out of 10
$99 a year, no change on renewal

Connecticut Registered Agent.co takes third spot: a Connecticut specialist at $99 a year that supplies an in-state registered office street address.

Connecticut Registered Agent.co puts a street address in the state on record for the company and scans served papers into your account.

The published prices and features do not separate CT Registered Agent.org from Connecticut Registered Agent.co; choose whichever you like.

What you get

  • A registered office street address in the state
  • Legal papers served on the company are scanned and sent to your online account

Strengths

  • Offers formation with a free first agent year
  • Yearly price below Mainstay Filing's
  • $99 per year, no step-up at renewal

Watch for

  • You file the annual report yourself
  • Limited to Connecticut; other states need another agent
Visit Connecticut Registered Agent.coPartner link. We may earn money if you buy. Connecticut Registered Agent.co: the full write-up

The 3 entries on one card

Place Service Card score Yearly cost Renews at Best for Go
1 CT Registered Agent.org 9.5 $99 $99/yr The lowest yearly price we rank here Visit CT Registered Agent.orgPartner link. We may earn money if you buy.
2 Mainstay Filing 9.0 $149 $149/yr An agent for every state Visit Mainstay FilingPartner link. We may earn money if you buy.
3 Connecticut Registered Agent.co 8.7 $99 $99/yr The lowest yearly price we rank here Visit Connecticut Registered Agent.coPartner link. We may earn money if you buy.

The marks out of 10 come from our editors and follow the weights on How we rank; none of them is a customer rating.

Connecticut registered agent cost in 2026: first year, renewal and the three-year tally

Service First year Second year Third year Three-year tally Holds its price at renewal
CT Registered Agent.org $99 $99 $99 $297 Yes
Mainstay Filing $149 $149 $149 $447 Yes
Connecticut Registered Agent.co $99 $99 $99 $297 Yes

Each price comes from the company's own site, read on November 12, 2026. Connecticut charges its own fees the same way whichever agent you name.

How the card was marked

Points here: 25% for cost across three years, 25% for coverage of the price and 50% across renewal terms, state-by-state fit and pricing clarity. Connecticut came down to cost across three years.

CT Registered Agent.org tallies $297 across three years, $150 below Mainstay Filing. If Connecticut is the only state, fifty-state coverage adds little, and the lower yearly price takes the points.

Every criterion and weight appears on How we rank.

What Connecticut Secretary of State requires of a Connecticut registered agent (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. Statute: Conn. Gen. Stat. § 34-243n.

The Connecticut annual report: fee, due date and your agent

Connecticut LLCs file the annual report every year. The fee is $80 and the date is on or before March 31. The state sends related notices to your registered agent.

Connecticut registered agent: quick questions

Is a Connecticut LLC obliged to keep a registered agent?

It is. Connecticut wants every LLC to have a registered agent on file, and that agent must hold a street address inside the state.

What is the going yearly rate for a registered agent in Connecticut?

Yearly prices span $99 to $149, and each service holds its price when it renews.

Is it allowed to serve as my own registered agent?

Yes, if you satisfy 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 must the Connecticut annual report be filed?

The deadline is on or before March 31. The state's fee is $80.

Which registered agents sit on this card?

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

Which Connecticut registered agent scores best on value?

CT Registered Agent.org, since $99 a year, flat, with scans of served legal papers delivered online.

See also

Where the figures come from

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