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Kept simple · Connecticut

3 Best Foreign Registration Services in Connecticut (2026), Kept Simple

In Connecticut for 2026, foreign registration services rank CT Registered Agent.org ($199), Mainstay Filing ($199) and Connecticut Registered Agent.co ($199). The state charges $120 to register. Services cost $397 to $497 over three years.
Charter Simple editors

The short version

State fee to register
$120
Certificate from home?
Yes (90 day age limit)
Next
$80, annual report
Our pick
CT Registered Agent.org, Mainstay Filing then Connecticut Registered Agent.co

Connecticut: the order

The order follows five checks. Three-year cost comes first, then what the price covers. See method.
1 Ranked first

1. CT Registered Agent.org: best for one extra state

$199 plus the state fee, then $99 a year

CT Registered Agent.org comes first because it charges $199 with first-year agent service included, then $99 a year.

Cost decides it. Three years here come to less than at Mainstay Filing.

Includes

  • Connecticut registration filing
  • Agent for year one

Good

  • $199 plus the state fee
  • Agent renews at $99
  • No agent charge in year one

Against

  • Two states, two providers
2 Works anywhere

2. Mainstay Filing: best for adding more states

$199 plus the state fee, then $149 a year

Mainstay Filing ranks second. It pairs a $199 service fee with a free first registered agent year, then $149 yearly.

It ranks lower because three years cost $100 more than CT Registered Agent.org, and cost has the largest weight.

The registered agent is free in year one. After that it is $149 a year, in any state.

Includes

  • Registration, filed
  • Registered agent, no charge the first year
  • One fee for all fifty states

Good

  • Service fee $199
  • No registered agent fee in year one
  • The same fee in every state

Against

  • Agent renews at $149, $50 above CT Registered Agent.org
3 Connecticut only

3. Connecticut Registered Agent.co: best for another local option

$199 plus the state fee, then $99 a year

Connecticut Registered Agent.co ranks third. It charges $199 with first-year agent service included, then $99 a year.

It charges what CT Registered Agent.org charges.

Includes

  • Connecticut registration filing
  • Agent for year one

Good

  • No agent charge in year one
  • $199 plus the state fee
  • Agent renews at $99

Against

  • Two states, two providers

Side by side

#CompanyStartAfter year oneThree yearsCovers
1 CT Registered Agent.org $199$99/yr$397connecticut registration filing; agent for year one Go to CT Registered Agent.orgPartner link. We may earn money if you buy.
2 Mainstay Filing $199$149/yr$497Registration, filed; registered agent, no charge the first year; one fee for all fifty states Go to Mainstay FilingPartner link. We may earn money if you buy.
3 Connecticut Registered Agent.co $199$99/yr$397connecticut registration filing; agent for year one Go to Connecticut Registered Agent.coPartner link. We may earn money if you buy.
Service fees only, read November 13, 2026. State fees are identical for every pick.

The facts

Must my LLC register here?

An LLC formed elsewhere registers with the Connecticut Secretary of the State, Business Services Division, then begins business in Connecticut.

Without registration, an LLC may face back fees for the unregistered period.

from business.ct.gov, October 2026, kept short

What does registration cost?

The state charges $120. A service adds $199.

Three years of state fees, registration included: $280. from business.ct.gov, October 2026, kept short

What registers the LLC?

You submit one form, the Foreign Registration Statement, Limited Liability, to the Connecticut Secretary of the State, Business Services Division.

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

What is due after registering?

Expect the annual report ($80).

The state's timing: Between January 1 and March 31.

What put the first pick first?

On three-year cost (38%), CT Registered Agent.org leads.

Five checks: three-year cost (38%), work included (27%), readable pricing (13%), renewal steadiness (11%) and state coverage (11%).

Three-year totals favor CT Registered Agent.org: $397, which is $100 lower than Mainstay Filing.

Method

Connecticut: registering a foreign LLC

ItemDetailSource
Registration fee$120from business.ct.gov, October 2026, kept short
Good standing certificateYes, 90 daysfrom business.ct.gov, October 2026, kept short
Annual report$80from business.ct.gov, October 2026, kept short
State fees, three years$280Sum of the rows above
The last row adds the filing fee, the reports in years two and three, and any minimum tax. A cost with no fixed amount, such as a newspaper notice, is left out.

Questions

Does the home state need its own agent?

Yes, in most cases. A provider active in every state, such as Mainstay Filing, can cover home and this state together.

What are the three-year totals?

CT Registered Agent.org costs $397 and Mainstay Filing costs $497 and Connecticut Registered Agent.co costs $397, before state fees.

Are the fees official?

Official Connecticut sources for the state side. Published prices for the service side.

Does the law require one?

No. Owners may file directly. A service saves time and can act as agent.

Does a service file it for me?

Yes. Every pick files it, and the state fee is the same for all.

What is the best foreign registration service in Connecticut?

Put CT Registered Agent.org first, and Mainstay Filing and Connecticut Registered Agent.co after.

References

  1. Charter Simple keeps Connecticut Secretary of the State on file from business.ct.gov, confirmed August 2026, and nothing more
  2. Charter Simple keeps Connecticut Secretary of the State on file from business.ct.gov, confirmed August 2026, and nothing more
  3. Charter Simple keeps Connecticut yearly filing: Annual report on file from business.ct.gov, confirmed October 2026, and nothing more
  4. Charter Simple keeps Connecticut report due date on file from cga.ct.gov, confirmed August 2026, and nothing more
  5. Charter Simple keeps Connecticut formation fee: Filing fee on file from business.ct.gov, confirmed October 2026, and nothing more
  6. Charter Simple keeps Connecticut formation fee: Filing fee on file from business.ct.gov, confirmed October 2026, and nothing more
  7. Charter Simple keeps Foreign LLC forms and fees on file from business.ct.gov, confirmed October 2026, and nothing more
  8. Charter Simple keeps Foreign Registration Statement form on file from business.ct.gov, confirmed October 2026, and nothing more
  9. Charter Simple keeps Foreign investigations penalties on file from business.ct.gov, confirmed October 2026, and nothing more
  10. Charter Simple keeps Who can be an agent on file from business.ct.gov, confirmed October 2026, and nothing more
  11. Charter Simple keeps Foreign annual report forms and on file from business.ct.gov, confirmed October 2026, and nothing more
  12. CT Registered Agent.org pricing page, read November 13, 2026
  13. Mainstay Filing Connecticut service page, read November 13, 2026
  14. Connecticut Registered Agent.co pricing page, read November 13, 2026