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Formation Scorecard

Foreign registration scorecard · Connecticut

3 Best Foreign Registration Services in Connecticut (2026)

On the Formation Scorecard 2026 scorecard for foreign registration services in Connecticut the order reads Connecticut Registered Agent.co ($199), Mainstay Filing ($199) and CT Registered Agent.org ($199). Connecticut Registered Agent.co posts the top score: $199 beyond the state fee to register in Connecticut, agent renewing at $99.
Researched and written by the Formation Scorecard editorial team
Rank #1 Our top pick

1. Connecticut Registered Agent.co: best for companies that add just Connecticut

9.2 Editor score out of 10
$199 service fee plus the state fee; agent $99 yearly from year two

Connecticut Registered Agent.co leads the card: $199 plus the state fee and a year of registered agent service, then $99 yearly for the agent.

The plan puts the company at an in-state street address and scans papers served on it to your online account.

It pulls ahead of Mainstay Filing on three-year cost.

What you get

  • Connecticut registration filed for you
  • Year-one registered agent service included

Strengths

  • $99 per year for the agent after the first
  • $199 to register, state fee extra
  • A year of registered agent service is built in

Watch for

  • Limited to Connecticut; your home state still needs an agent
  • $99 extra for the EIN application
Visit Connecticut Registered Agent.coPartner link. We may earn money if you buy. Connecticut Registered Agent.co: the full write-up
Rank #2 Fifty-state coverage

2. Mainstay Filing: best for companies spread across states

9.0 Editor score out of 10
$199 service fee, $319 due at checkout including the state fee; agent $149 yearly from year two

Mainstay Filing takes second spot: it files the Connecticut registration for $199 and acts as your registered agent, free for year one and $149 a year after.

The agent is free in year one and $149 a year after that, wherever the company registers.

Connecticut Registered Agent.co undercuts Mainstay Filing by $100 over three years, and that gap costs Mainstay points on cost.

What you get

  • Registration prepared and submitted
  • The first registered agent year at no charge
  • Service of process scanned and uploaded the same business day, no fee

Strengths

  • $199 service fee, with the state fee on top
  • Registered agent free for year one
  • Served papers scanned on the day they arrive, free
  • Same price across all fifty states

Watch for

  • Agent renewal of $149 is $50 more than Connecticut Registered Agent.co charges
Visit Mainstay FilingPartner link. We may earn money if you buy. Mainstay Filing: the full write-up
Rank #3 Low renewal

3. CT Registered Agent.org: best for registrations in Connecticut only

8.7 Editor score out of 10
$199 service fee plus the state fee; agent $99 yearly from year two

CT Registered Agent.org takes third spot: $199 plus the state fee and a year of registered agent service, then $99 yearly for the agent.

The plan puts the company at an in-state street address and scans papers served on it to your online account.

Price for price and feature for feature, Connecticut Registered Agent.co and CT Registered Agent.org match, which leaves the order between them a narrow call.

What you get

  • Connecticut registration filed for you
  • Year-one registered agent service included

Strengths

  • A $199 service fee before the state's
  • Registered agent service for year one is in the price
  • Agent at $99 a year from year two

Watch for

  • Limited to Connecticut; your home state still needs an agent
  • $99 extra for the EIN application
Visit CT Registered Agent.orgPartner link. We may earn money if you buy. CT Registered Agent.org: the full write-up

The 3 entries on one card

Place Service Card score Service fee Year two Best for Go
1 Connecticut Registered Agent.co 9.2 $199 $99/yr The lowest agent renewal we rank here Visit Connecticut Registered Agent.coPartner link. We may earn money if you buy.
2 Mainstay Filing 9.0 $199 $149/yr Companies spread over several states Visit Mainstay FilingPartner link. We may earn money if you buy.
3 CT Registered Agent.org 8.7 $199 $99/yr The lowest agent renewal we rank here Visit CT Registered Agent.orgPartner link. We may earn money if you buy.

Every number out of 10 is an editorial mark from Formation Scorecard, produced with the criteria on How we rank, not a customer rating.

Connecticut foreign registration service cost in 2026: first year, renewal and the three-year tally

Service First year Second year Third year Three-year tally Agent paid in year one
Connecticut Registered Agent.co $199 $99 $99 $397 Included
Mainstay Filing $199 $149 $149 $497 Free
CT Registered Agent.org $199 $99 $99 $397 Included

Each price comes from the company's own site, read on November 12, 2026. Add Connecticut's $120 registration fee to each row; the tally above leaves it out.

Reading the order

Formation Scorecard scores cost across three years and coverage of the price at 25% each. Renewal terms, state-by-state fit and pricing clarity account for the other 50%. In Connecticut the tie was broken by cost across three years.

Connecticut Registered Agent.co tallies $397 across three years, $100 below Mainstay Filing. Both include the first agent year, so the renewal price after year one broke the tie.

Every criterion and weight appears on How we rank.

Foreign LLC registration in Connecticut: fee, form and filing office

An outside company registers by sending the Foreign Registration Statement, Limited Liability to the Connecticut Secretary of the State, Business Services Division, with a $120 state fee. Connecticut additionally requires certificate of existence (certificate of good standing) from the state of formation, dated no more than 90 days before filing.

Once registered, the company files the annual report ($80), due between January 1 and March 31.

Gather these before filing

  • Certificate of existence (certificate of good standing) from the state of formation, issued no earlier than 90 days before filing.
  • The company name exactly as the home state has it, plus the date it was formed.
  • An in-state registered agent; any service on this card can fill that role.
  • The state fee of $120, sent in with the filing.
  • A calendar date for the annual report and its $80 fee.

The price of ignoring Connecticut registration

Fees for the unregistered period come due as well.

Connecticut foreign registration service: quick questions

Does Connecticut make an outside LLC register before operating?

Yes, when the company does business there.

What will foreign registration run in Connecticut?

Expect $120 for the state plus $199 for the service.

Is a home-state certificate part of the Connecticut filing?

Yes, the state wants certificate of existence (certificate of good standing) from the state of formation, no older than 90 days.

Does a registered company still need a registered agent?

Yes, a registered agent with an in-state street address has to stay on file.

Which foreign registration services sit on this card?

Connecticut Registered Agent.co ($199), Mainstay Filing ($199) and CT Registered Agent.org ($199), top to bottom.

Which foreign registration service leads the card for Connecticut?

Connecticut Registered Agent.co, since the Connecticut registration at $199, first agent year included, then $99 a year.

Related pages

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. Foreign LLC forms and fees, Business.CT.gov, as of October 2026
  8. Foreign Registration Statement form, as of October 2026
  9. Foreign investigations penalties, as of October 2026
  10. Who can be an agent, as of October 2026
  11. Foreign annual report forms and fees, as of October 2026
  12. Read on November 12, 2026: pricing and service pages for Connecticut Registered Agent.co
  13. Read on November 12, 2026: Connecticut service page for Mainstay Filing
  14. Read on November 12, 2026: pricing and service pages for CT Registered Agent.org