Skip to content
The Formation Desk

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

Foreign registration picks · Connecticut

3 Best Foreign Registration Services in Connecticut (2026)

The The Formation Desk call for foreign registration services in Connecticut in 2026: Mainstay Filing ($199), CT Registered Agent.org ($199) and Connecticut Registered Agent.co ($199), in that order. Mainstay Filing takes the call: $199 plus the state's own fee, the registered agent free for year one and the same price in every state.
Written by The Formation Desk editorial team
1
Top pick on this page

1. Mainstay Filing: best for companies working in more than one state

$199 for the service, $319 due at checkout with the state fee; agent $149 a year after year one

Editorial score 9.1 out of 10

The desk picks Mainstay Filing: it files the Connecticut registration for $199 and serves as your registered agent, free in year one, then $149 a year.

Agent service costs nothing in year one and $149 a year from then on, whichever state you register in.

Over three years Mainstay runs $100 more than CT Registered Agent.org, and the desk thinks the wider coverage is worth it.

In the price

  • The registration, prepared and filed for you
  • A free registered agent for the first year
  • Any service of process scanned for free and uploaded that business day

Strengths

  • Same price in all fifty states
  • $199 service fee, state fee on top
  • Registered agent costs nothing in year one
  • Free scans of served papers on the same business day

Cons

  • Agent renewal of $149 is $50 above CT Registered Agent.org
Visit Mainstay FilingPartner link. We may earn money if you buy. Mainstay Filing up close
2
Lower renewal than Mainstay

2. CT Registered Agent.org: best for adding only Connecticut

$199 for the service, state fee on top; agent $99 a year after year one

Editorial score 8.6 out of 10

Runner-up, CT Registered Agent.org: the Connecticut registration for $199, first agent year included, then $99 yearly.

You get an in-state street address as the registered office, and papers served there are scanned into your account.

In the price

  • The registration filing
  • A first year of registered agent service

Strengths

  • Registers the company for $199, plus the state's fee
  • Registered agent service for year one is covered
  • $99 a year for the agent from year two

Cons

  • Connecticut only; your home state needs its own agent
  • EIN application will cost you $99 more
Visit CT Registered Agent.orgPartner link. We may earn money if you buy. CT Registered Agent.org up close
3
Best local option

3. Connecticut Registered Agent.co: best for Connecticut registrations only

$199 for the service, state fee on top; agent $99 a year after year one

Editorial score 8.3 out of 10

Third, Connecticut Registered Agent.co: the Connecticut registration for $199, first agent year included, then $99 yearly.

You get an in-state street address as the registered office, and papers served there are scanned into your account.

On price and features there is nothing between CT Registered Agent.org and Connecticut Registered Agent.co, which makes the order a close call.

In the price

  • The registration filing
  • A first year of registered agent service

Strengths

  • $199 to register, state fee extra
  • Year-two agent price: $99
  • Includes a first year as your registered agent

Cons

  • Connecticut only; your home state needs its own agent
  • EIN application will cost you $99 more
Visit Connecticut Registered Agent.coPartner link. We may earn money if you buy. Connecticut Registered Agent.co up close

The desk's 3 picks in brief

Pick Service Desk score Service fee Year two Good for Visit
1 Mainstay Filing 9.1 $199 $149/yr Companies doing business in several states Visit Mainstay FilingPartner link. We may earn money if you buy.
2 CT Registered Agent.org 8.6 $199 $99/yr The lowest agent renewal we rank here Visit CT Registered Agent.orgPartner link. We may earn money if you buy.
3 Connecticut Registered Agent.co 8.3 $199 $99/yr The lowest agent renewal we rank here Visit Connecticut Registered Agent.coPartner link. We may earn money if you buy.

The Formation Desk sets every score out of 10 itself from the weighted criteria on How we rank; customers do not rate anything.

What a Connecticut foreign registration service costs in 2026: year one, renewal and the three-year bill

Service Year one Year two Year three Bill over three years Agent covered in year one
Mainstay Filing $199 $149 $149 $497 Free
CT Registered Agent.org $199 $99 $99 $397 Included
Connecticut Registered Agent.co $199 $99 $99 $397 Included

Every price here was read off the company's own pages on November 12, 2026. Connecticut's $120 registration fee comes on top of every row and is left out of these totals.

Why Mainstay Filing is the pick

The Formation Desk counts spend over three years and work the price removes for 33% each; what renewal looks like, fit with the state and plain price display make up the other 34%. What tipped Connecticut: work the price removes.

Foreign registration means two states, and one provider at one price in both won on coverage, ahead of CT Registered Agent.org.

The full criteria and weights are on How we rank.

Registering a foreign LLC in Connecticut: fee, form and who gets it

To register, the company files the Foreign Registration Statement, Limited Liability with the Connecticut Secretary of the State, Business Services Division and pays the state's $120. Connecticut also wants certificate of existence (certificate of good standing) from the state of formation, issued within 90 days of the filing.

From then on the company owes the annual report ($80), due between January 1 and March 31.

What to pull together first

  • Certificate of existence (certificate of good standing) from the state of formation, issued in the 90 days before you file.
  • The company name exactly as the home state spells it, and when it was formed.
  • An in-state registered agent; any service the desk picked can fill that seat.
  • $120 for the state, paid when you file.
  • A date on your calendar for the annual report and its $80 fee.

What it costs to ignore Connecticut registration

Back fees for the years it operated unregistered come due too.

Connecticut foreign registration service: reader questions

Does an LLC from elsewhere have to register to operate in Connecticut?

Yes, once it starts doing business there.

What will foreign registration cost you in Connecticut?

$120 goes to the state and $199 to the service.

Will Connecticut ask for something from your home state?

Yes: certificate of existence (certificate of good standing) from the state of formation, issued in the last 90 days.

Do you still need a registered agent after you register?

Yes. Keep a registered agent with a street address in the state on file.

Which foreign registration services did the desk rank here?

Mainstay Filing ($199), CT Registered Agent.org ($199) and Connecticut Registered Agent.co ($199), best pick first.

Who is our pick for foreign registration in Connecticut?

Mainstay Filing, since $199 on top of state fees in any state, with the first year of registered agent service included.

More from us

Where the numbers came from

  1. Connecticut Secretary of the State, Business Services Division, last checked August 2026
  2. Connecticut Secretary of the State, Business Services Division, last checked August 2026
  3. Connecticut yearly filing: Annual report: fee, official source, last checked October 2026
  4. Connecticut report due date, last checked August 2026
  5. Connecticut formation fee: Filing fee, official source, last checked October 2026
  6. Connecticut formation fee: Filing fee, official source, last checked October 2026
  7. Foreign LLC forms and fees, Business.CT.gov, last checked October 2026
  8. Foreign Registration Statement form, last checked October 2026
  9. Foreign investigations penalties, last checked October 2026
  10. Who can be an agent, last checked October 2026
  11. Foreign annual report forms and fees, last checked October 2026
  12. Mainstay Filing: Connecticut service page, as of November 12, 2026
  13. CT Registered Agent.org: pricing and service pages, as of November 12, 2026
  14. Connecticut Registered Agent.co: pricing and service pages, as of November 12, 2026