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Formation ClassClass is in session: LLC paperwork, state by state.

Class 3 · Connecticut

Foreign LLC Registration Class, Connecticut (2026): 5 Assignments and the 3 Best Services

If you want help registering an LLC from another state in Connecticut in 2026, the top grades go to Connecticut Registered Agent.co ($199), CT Registered Agent.org ($199) and Mainstay Filing ($199), in that order. Connecticut charges $120 to register a foreign LLC, and 5 assignments explain how.

Taught by the Formation Class faculty

Key facts for this class

State filing fee$120Look at business.ct.gov for yourself; we read it in October 2026
Certificate from your home state90 daysAge limit
Maintenance filing$80Annual report
State fees over three years$280Registration, reports and any minimum tax
How many assignments5Listed below

By the end you will know

  • Which LLCs must register
  • The filing, its price and its office
  • The upkeep that repeats
  • Which services we recommend and why

Connecticut: the graded services

Three-year tuition and homework done weigh the most; how we grade lists all five criteria.
Highest grade

1. Connecticut Registered Agent.co: best for a small yearly agent fee

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

In Connecticut, Connecticut Registered Agent.co sits at the top of the class: the Connecticut registration is filed for $199 with a year of agent service, and the plan renews at $99.

Its three-year bill is lower than Mainstay Filing's, which wins first place because tuition counts 30%.

Covered by the tuition

  • Registration paperwork handled
  • One year of agent service is part of the price

Strengths

  • $199 to register
  • A year of agent service is included
  • A small $99 renewal

Weak spots

  • The home state needs a different agent
Focused on Connecticut

2. CT Registered Agent.org: best for registering only in Connecticut

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

Second place goes to CT Registered Agent.org, since the Connecticut registration is filed for $199 with a year of agent service, and the plan renews at $99.

It lists the same prices as Connecticut Registered Agent.co.

Covered by the tuition

  • Registration paperwork handled
  • One year of agent service is part of the price

Strengths

  • A small $99 renewal
  • A year of agent service is included
  • $199 to register

Weak spots

  • The home state needs a different agent
Does most of the work

3. Mainstay Filing: best for companies adding a second state

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

Third place goes to Mainstay Filing, since $199 over the state fee, the registered agent free in year one and $149 a year after that.

Add up three years: it comes to $100 more than Connecticut Registered Agent.co.

The agent renews at $149 a year in every state.

Covered by the tuition

  • Filing made with the state
  • The registered agent costs nothing in year one
  • Any state, one price

Strengths

  • A $199 service charge
  • The agent costs nothing in year one
  • Ready for the next state too

Weak spots

  • A pricier agent renewal ($149)

The Connecticut grades compared

#ServiceFirst yearFrom year twoThree-year total
1Connecticut Registered Agent.co$199$99/yr$397Visit Connecticut Registered Agent.coPartner link. We may earn money if you buy.
2CT Registered Agent.org$199$99/yr$397Visit CT Registered Agent.orgPartner link. We may earn money if you buy.
3Mainstay Filing$199$149/yr$497Visit Mainstay FilingPartner link. We may earn money if you buy.
Company prices as listed on November 13, 2026. Every row also owes the $120 state fee.

The class, assignment by assignment

  1. Assignment
    1

    Does the rule apply to you?

    When an LLC from elsewhere starts operating in Connecticut, foreign registration is the way in. Doing business without registering means: Back fees are collected in addition.

    Textbook page: Look at business.ct.gov for yourself; we read it in October 2026

  2. Assignment
    2

    Collect the document from the home state

    You need certificate of existence (certificate of good standing) from the state of formation, issued inside 90 days.

    Ask for the certificate shortly before filing day.

  3. Assignment
    3

    Appoint the Connecticut registered agent

    Every LLC must name a registered agent with an in-state street address. The address has to be a Connecticut street address that is not a P.O. box, plus a Connecticut mailing address, which can be a P.O. box.

    Any of the graded services can fill this seat.

    Textbook page: Look at cga.ct.gov for yourself; we read it in October 2026

  4. Assignment
    4

    Draw up the Foreign Registration Statement, Limited Liability

    To register, hand the Foreign Registration Statement, Limited Liability to the Connecticut Secretary of the State, Business Services Division with $120.

    Textbook page: Look at business.ct.gov for yourself; we read it in October 2026

  5. Assignment
    5

    Look ahead to the recurring filing

    File the annual report at $80, between January 1 and March 31 to keep the registration going.

Connecticut costs by assignment

EntryPayeeCost
Registering the LLCState office$120
Annual reportState office$80
A filing service (optional)The provider$199 to start
Three-year state totalState office$280
Anything paid to Connecticut is an official fee you can look up on the pages listed below. The three-year row combines the filing, two later reports and a minimum tax where there is one, and service prices are not part of it.

How we graded the Connecticut picks

On tuition across three years (30% of the grade) came out on top, with close behind.

Connecticut Registered Agent.co wins the cost criterion with $397 over three years, against $100 more at Mainstay Filing.

Connecticut questions

What does an LLC from elsewhere pay to register in Connecticut?

$120 at the state office. A service adds $199.

Which form do I file to register?

The Foreign Registration Statement, Limited Liability is the one to track down, and it goes to the Connecticut Secretary of the State, Business Services Division.

Do I need a certificate from my home state?

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

What if the LLC does business there without registering?

Back fees are collected in addition.

What is due after registering?

Once you are registered, the LLC owes the annual report, billed at $80 each time.

Which service should handle the registration?

Connecticut Registered Agent.co, CT Registered Agent.org and Mainstay Filing, from the highest grade to the lowest.

Next class

Textbook pages and extra reading

  1. Study tip for Connecticut Secretary of the State, Business Services Division: everything above comes from business.ct.gov, which we reread in August 2026. Open it and follow along.
  2. Study tip for Connecticut Secretary of the State, Business Services Division: everything above comes from business.ct.gov, which we reread in August 2026. Open it and follow along.
  3. Study tip for Connecticut yearly filing: Annual report: fee, official source: everything above comes from business.ct.gov, which we reread in October 2026. Open it and follow along.
  4. Study tip for Connecticut report due date: everything above comes from cga.ct.gov, which we reread in August 2026. Open it and follow along.
  5. Study tip for Connecticut formation fee: Filing fee, official source: everything above comes from business.ct.gov, which we reread in October 2026. Open it and follow along.
  6. Study tip for Connecticut formation fee: Filing fee, official source: everything above comes from business.ct.gov, which we reread in October 2026. Open it and follow along.
  7. Study tip for Foreign LLC forms and fees, Business.CT.gov: everything above comes from business.ct.gov, which we reread in October 2026. Open it and follow along.
  8. Study tip for Foreign Registration Statement form: everything above comes from business.ct.gov, which we reread in October 2026. Open it and follow along.
  9. Study tip for Foreign investigations penalties: everything above comes from business.ct.gov, which we reread in October 2026. Open it and follow along.
  10. Study tip for Who can be an agent: everything above comes from business.ct.gov, which we reread in October 2026. Open it and follow along.
  11. Study tip for Foreign annual report forms and fees: everything above comes from business.ct.gov, which we reread in October 2026. Open it and follow along.
  12. The pricing page at Connecticut Registered Agent.co, November 13, 2026
  13. The pricing page at CT Registered Agent.org, November 13, 2026
  14. The Connecticut service page at Mainstay Filing, November 13, 2026