3 Best Foreign Registration Services in Connecticut (2026)
LLC Review Desk's 2026 picks for foreign registration services in Connecticut, favorite first, are Mainstay Filing ($199), Connecticut Registered Agent.co ($199) and CT Registered Agent.org ($199). Mainstay Filing is our favorite, because it's $199 beyond the state fee in any state, and the first registered agent year is included.
By the LLC Review Desk editorial team
Position 1
Our top pick
1. Mainstay Filing: best for owners working in more than one state
You pay $199 plus the state fee ($319 at checkout), then $149 a year for the agent
Our score
9.3out of 10
9.3 out of 10
Our favorite is Mainstay Filing, because you pay $199 on top of the state's fee, your first year as registered agent is free, and the price is the same in every state.
Year one as agent costs nothing; every later year is $149, in any state.
Over three years it costs $100 more than Connecticut Registered Agent.co, and for us the extra things it handles are worth that.
In the price
Your registration filing, taken care of
The first registered agent year at no charge
No-charge scans of served papers on the day they arrive
What we like
The same price in all fifty states
$199 for the service, plus the state's fee
Your first year of registered agent service is free
Same-business-day scans of papers served on the company, no charge
Trade-offs
After year one the agent is $149 a year, $50 more than Connecticut Registered Agent.co
LLC Review Desk gives each score out of 10 itself, based on the criteria on How we rank. No customer ratings are involved.
What Connecticut foreign registration services cost in 2026: year one, renewals and three years
Service
First year
Second year
Third year
Three-year total
Agent covered in year one
Mainstay Filing
$199
$149
$149
$497
Free
Connecticut Registered Agent.co
$199
$99
$99
$397
Included
CT Registered Agent.org
$199
$99
$99
$397
Included
We took each price from the company's own pages on November 12, 2026. On top of every row, Connecticut charges a $120 registration fee, which isn't in these totals.
How the order came together
Here's how we scored it: three-year cost and filings in the price are worth 29% each, and renewal price, state fit and up-front totals split the other 42%. In Connecticut, filings in the price made the difference.
Registering in a second state means working with two states, so one company at one price for both won the coverage score over Connecticut Registered Agent.co.
You can read every criterion and weight on How we rank.
Registering a foreign LLC in Connecticut: fee, form and who to send it to
You register through the Connecticut Secretary of the State, Business Services Division, using the Foreign Registration Statement, Limited Liability. The state charges $120. Connecticut also wants certificate of existence (certificate of good standing) from the state of formation that is no more than 90 days old.
After that, plan on the annual report each cycle ($80) by between January 1 and March 31.
Get these ready first
Certificate of existence (certificate of good standing) from the state of formation, issued within 90 days of when you file.
Your company's full legal name, exactly as registered at home, and the date it was formed there.
A registered agent with a street address in the state. Any service on this page can do it.
The $120 state fee to pay with the filing.
A reminder for yourself about the annual report and its $80 fee.
What happens if you skip Connecticut registration
You may also owe fees for the time you were unregistered.
Your questions about Connecticut foreign registration services
Do I have to register my out-of-state LLC in Connecticut?
If it does business there, yes.
What does registering a foreign LLC in Connecticut come to?
The state charges $120, and services charge $199.
Does Connecticut want paperwork from my home state?
It does: certificate of existence (certificate of good standing) from the state of formation, no more than 90 days old.
Do I still need a registered agent after I register?
Yes. You keep a registered agent with a street address in the state as long as the company stays registered.
Which foreign registration services did we review here?
Mainstay Filing ($199), Connecticut Registered Agent.co ($199) and CT Registered Agent.org ($199), with our favorite first.
Who's the best choice for foreign registration in Connecticut?
Mainstay Filing, because $199 gets the Connecticut registration filed, year one as registered agent costs nothing, and after that it's $149 a year.