Explained · Connecticut
3 Best Foreign Registration Services in Connecticut (2026) for Owners
Summary
- Registration fee at the state
- $120
- Proof of existence?
- Needed (90 days at the most)
- Later filings
- $80, annual report
- Our picks in order
- Connecticut Registered Agent.co, Mainstay Filing then CT Registered Agent.org
Who we recommend in Connecticut
Ranked using five checks described on our method page.1. Connecticut Registered Agent.co: best for a lean registration
$199 plus the state fee, then $99 yearly
Connecticut Registered Agent.co comes out on top: three years of service fees come to $397.
Of the two, it has the lower three-year cost, and that is the first thing we weigh.
Includes
- State registration done for you
- A first year of agent service
Points in its favor
- Registers for $199
- The agent renews at $99
- Year-one agent service is included
Where it falls short
- Nothing outside this state
2. Mainstay Filing: best for adding several states
$199 plus the state fee, then $149 yearly
Number 2 on the list is Mainstay Filing, where registering costs $199 plus state fees, and the registered agent is free the first year.
Across three years it is $100 pricier than Connecticut Registered Agent.co.
From the second year, $149 a year covers the registered agent anywhere.
Includes
- Registration paperwork done for you
- Registered agent, included in year one
- The same fee in every state
Points in its favor
- $199, with state fees extra
- The first year of agent service is included
- Identical fee in every state
Where it falls short
- Renewal runs $50 over Connecticut Registered Agent.co
3. CT Registered Agent.org: best for a low agent renewal
$199 plus the state fee, then $99 yearly
CT Registered Agent.org ranks third. In short, three years of service fees come to $397.
Its published prices are identical to Connecticut Registered Agent.co, so choosing between them is a close call.
Includes
- State registration done for you
- A first year of agent service
Points in its favor
- The agent renews at $99
- Year-one agent service is included
- Registers for $199
Where it falls short
- Nothing outside this state
How they stack up
| # | Pick | First-year price | Each year after | Total, 3 years | Included in the price | |
|---|---|---|---|---|---|---|
| 1 | Connecticut Registered Agent.co | $199 | $99/yr | $397 | state registration done for you; A first year of agent service | Go to Connecticut Registered Agent.coPartner link. We may earn money if you buy. |
| 2 | Mainstay Filing | $199 | $149/yr | $497 | registration paperwork done for you; registered agent, included in year one; the same fee in every state | Go to Mainstay FilingPartner link. We may earn money if you buy. |
| 3 | CT Registered Agent.org | $199 | $99/yr | $397 | state registration done for you; A first year of agent service | Go to CT Registered Agent.orgPartner link. We may earn money if you buy. |
The questions, one by one
At what point is registration required?
Registration comes first: an LLC from another state signs up before transacting business in Connecticut.
An unregistered LLC may face the fees it would have paid.
see business.ct.gov, October 2026
How much does registration cost?
$120 in state fees, plus $199 for a service.
By the end of year three the state has collected $280. see business.ct.gov, October 2026
What is the application called?
One document is needed: the Foreign Registration Statement, Limited Liability, filed with the Connecticut Secretary of the State, Business Services Division.
Include with it certificate of existence (certificate of good standing) from the state of formation dated at most 90 days.
Are there ongoing fees?
You keep filing the annual report, at $80.
Filings come due Between January 1 and March 31.
Why is the order what it is?
Connecticut Registered Agent.co leads on what three years cost, a criterion that carries 34% of the weight.
What three years cost carries 34% and how much work the price handles carries 28%. Three smaller criteria decide close calls.
Connecticut Registered Agent.co comes to $397 across three years, $100 less than Mainstay Filing.
Connecticut: rules and fees at a glance
| Requirement | What the state says | Where it comes from |
|---|---|---|
| Application fee | $120 | see business.ct.gov, October 2026 |
| Home-state certificate | Needed, 90 days | see business.ct.gov, October 2026 |
| Annual report | $80 | see business.ct.gov, October 2026 |
| State fees across three years | $280 | Added up from the rows above |
Other things people ask
Will one agent cover both states?
Each state sets its own rules. Mainstay Filing works in both; a one-state service works in one.
What does each pick cost across three years?
Connecticut Registered Agent.co: $397 | Mainstay Filing: $497 | CT Registered Agent.org: $397, with state fees on top.
What are your sources?
State fees come from Connecticut's official sources, cited by each figure. Service prices come from each company's own pricing page.
Do I have to hire a service?
No law demands one. A service is a convenience.
Do these services handle the filing?
The picks on this page all file it; state fees are identical.
Who would you hire first in Connecticut?
Connecticut Registered Agent.co ranks first on what three years cost, ahead of Mainstay Filing and CT Registered Agent.org.
Sources used on this page
- business.ct.gov: Connecticut Secretary of the State (confirmed August 2026)
- business.ct.gov: Connecticut Secretary of the State (confirmed August 2026)
- business.ct.gov: Connecticut yearly filing: Annual report (confirmed October 2026)
- cga.ct.gov: Connecticut report due date (confirmed August 2026)
- business.ct.gov: Connecticut formation fee: Filing fee (confirmed October 2026)
- business.ct.gov: Connecticut formation fee: Filing fee (confirmed October 2026)
- business.ct.gov: Foreign LLC forms and fees (confirmed October 2026)
- business.ct.gov: Foreign Registration Statement form (confirmed October 2026)
- business.ct.gov: Foreign investigations penalties (confirmed October 2026)
- business.ct.gov: Who can be an agent (confirmed October 2026)
- business.ct.gov: Foreign annual report forms and (confirmed October 2026)
- Connecticut Registered Agent.co, pricing page, accessed November 13, 2026
- Mainstay Filing, Connecticut service page, accessed November 13, 2026
- CT Registered Agent.org, pricing page, accessed November 13, 2026