3 Best Foreign Registration Services in Connecticut (2026) for You
Our 2026 Connecticut ranking, best first, is CT Registered Agent.org ($199), Mainstay Filing ($199) and Connecticut Registered Agent.co ($199). State fee: $120. Service fees over three years: $397 to $497.
By the LLC Answered editorial team
Quick reply
Short reply
Charged by the state
$120
Home-state certificate needed?
Yes, it is required (90 days maximum age)
Later filing
$80, annual report
Our ranking
CT Registered Agent.org, Mainstay Filing then Connecticut Registered Agent.co
1. CT Registered Agent.org: best for one extra state
$199 to register, $99 for the agent after
CT Registered Agent.org comes first, as $199 above the state fee at the start, and $99 yearly after that.
It beats Mainstay Filing on three-year cost, the test we weigh most.
What is bundled
Connecticut registration filing
Agent included in year one
Pluses
$99 a year from year two
No agent charge for year one
Registers for $199
Downsides
A second provider for the home state
#2Fifty states
2. Mainstay Filing: best for registering in many states
$199 to register, $149 for the agent after
Mainstay Filing is number 2, because $199 on top of the state fee gets you registered, with the registered agent free in year one and $149 a year afterward.
Three years here run $100 above CT Registered Agent.org.
The registered agent renews at $149 a year in every state.
What is bundled
Registration filing
Registered agent, first year free
Priced identically in any state
Pluses
$199 to register
One price anywhere
No agent charge in year one
Downsides
Agent renews at $149, $50 over CT Registered Agent.org
#3Connecticut choice
3. Connecticut Registered Agent.co: best for a one-state add-on
$199 to register, $99 for the agent after
In third spot, Connecticut Registered Agent.co, as $199 above the state fee at the start, and $99 yearly after that.
It charges what CT Registered Agent.org charges; the order between them is close.
What is bundled
Connecticut registration filing
Agent included in year one
Pluses
$99 a year from year two
Registers for $199
No agent charge for year one
Downsides
A second provider for the home state
Compared in a table
#
Company
First year
Renewal
Three-year cost
Included
1
CT Registered Agent.org
$199
$99/yr
$397
connecticut registration filing; agent included in year one
How the total works: filing + report in year two + report in year three + any minimum tax. Open-ended costs are mentioned in the text only.
Short Q&A
Do both states require an agent?
Normally yes. A national provider can serve the home state and this one together.
What does each pick cost across three years?
CT Registered Agent.org $397; Mainstay Filing $497; Connecticut Registered Agent.co $397 for the services alone.
How do you know these fees?
State side: Connecticut's published fee schedules and forms. Service side: the prices each company lists.
Can I skip hiring one?
You can file yourself if you meet the rules on this page, and the state charges what it charges either way.
Do these companies file it?
Yes. Each pick prepares and files it, and the state fee does not depend on which you choose.
What is the best foreign registration service for Connecticut?
CT Registered Agent.org leads because registering costs $199 over the state fee, agent covered in year one, then $99 a year; Mainstay Filing and Connecticut Registered Agent.co come next.