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Biz Formation Academy

A plain textbook on LLC paperwork, one state per chapter.

Unit 3 · Connecticut

Foreign LLC Registration Chapter, Connecticut (2026): 5 Sections and the 3 Best Services

In 2026 the services this chapter recommends for registering an LLC formed elsewhere in Connecticut are CT Registered Agent.org ($199), Mainstay Filing ($199) and Connecticut Registered Agent.co ($199), best first. First decide whether registration applies. The remaining sections, 5 in all, give the form and the $120 fee.
Written by the Biz Formation Academy editorial board

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Charge for registering $120 Source text at business.ct.gov, October 2026
Home certificate 90 days Must be issued within
Recurring report $80 Annual report
Three-year state cost $280 Service fees excluded
Section count 5 Each one explained

After this chapter you will understand

  • When the rule applies
  • What to file and what it costs
  • The recurring filing
  • The recommendations and their reasons

The Connecticut shortlist

Cost over three years comes first, then paperwork completed, second-year price, Connecticut fit and price clarity (grading page).

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

Recommended first
$199 and the $120 state fee, then $99 annually

CT Registered Agent.org comes first. A service fee of $199 and a yearly agent renewal of $99.

Its three-year total is below Mainstay Filing's, which earns first place because cost carries 34%.

Price covers

  • The filing is made for you
  • A year of agent service is built into the price

Advantages

  • $199 above the state fee
  • Then $99 per year
  • Agent covered in year one

Limitations

  • Nothing offered outside the state
Visit CT Registered Agent.org Partner link. We may earn money if you buy.

2. Mainstay Filing: best for one provider for both states

Upkeep included
$199 and the $120 state fee, then $149 annually

Second place is held by Mainstay Filing, since registration with Connecticut costs $199 over the state fee, with year one of the registered agent included.

Three years cost $100 above CT Registered Agent.org, and cost counts for 34% of the ranking.

The agent line on the second invoice reads $149, and stays there in each state.

Price covers

  • The registration is prepared and submitted
  • The registered agent carries no charge in year one
  • Service in all fifty states

Advantages

  • A service charge of $199
  • Registered agent costs nothing in year one
  • The same fee in every state

Limitations

  • Renewal $50 above CT Registered Agent.org's
Visit Mainstay Filing Partner link. We may earn money if you buy.

3. Connecticut Registered Agent.co: best for a local filer

Single-state plan
$199 and the $120 state fee, then $99 annually

Connecticut Registered Agent.co takes third position; a service fee of $199 and a yearly agent renewal of $99.

It charges exactly what CT Registered Agent.org charges.

Price covers

  • The filing is made for you
  • A year of agent service is built into the price

Advantages

  • Agent covered in year one
  • $199 above the state fee
  • Then $99 per year

Limitations

  • Nothing offered outside the state
Visit Connecticut Registered Agent.co Partner link. We may earn money if you buy.

3 services, side by side

#ServiceFirst yearFrom year twoThree-year total
1 CT Registered Agent.org $199$99/yr$397 Visit CT Registered Agent.org Partner link. We may earn money if you buy.
2 Mainstay Filing $199$149/yr$497 Visit Mainstay Filing Partner link. We may earn money if you buy.
3 Connecticut Registered Agent.co $199$99/yr$397 Visit Connecticut Registered Agent.co Partner link. We may earn money if you buy.

Taken from each company's price page on November 13, 2026. Every row also owes the $120 state fee.

The Connecticut registration, in sequence

  1. Section 1

    Does the registration rule apply?

    Connecticut requires an out-of-state LLC to register first if it will do business here. Failure to register can mean: back fees for the unregistered period

    Reference: Source text at business.ct.gov, October 2026

  2. Section 2

    Order the certificate your home state issues

    Attach certificate of existence (certificate of good standing) from the state of formation, from the preceding 90 days.

    Leave it until the other documents are ready.

  3. Section 3

    Appoint a registered agent for Connecticut

    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.

    The recommended reading covers this role.

    Reference: Source text at cga.ct.gov, October 2026

  4. Section 4

    The state wants the Foreign Registration Statement, Limited Liability

    The form and a fee of $120 are sent together to the Connecticut Secretary of the State, Business Services Division.

    Reference: Source text at business.ct.gov, October 2026

  5. Section 5

    Keep the registration in force

    What follows registration is the annual report, priced at $80, with timing of between January 1 and March 31.

The price list

ItemRecipientCost
Section on registration Filing office$120
Annual report Filing office$80
Service, if hired Service$199 for year one
State fees for the first three years Filing office$280

Anything paid to Connecticut is an official fee that can be verified in the bibliography. The three-year row combines the filing, two later reports and a minimum tax where one exists; service prices are not part of it.

Why the list is in this order

On tuition over three years (34% of the ranking) came first, with next.

By year three CT Registered Agent.org has cost $397, a saving of $100 next to Mainstay Filing.

What readers ask

What is the cost to register a foreign LLC with Connecticut?

$120 at the filing office. The services here charge $199 more.

Which form do I file to register?

A single form does the job, and the Connecticut Secretary of the State, Business Services Division handles it.

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 for the unregistered period

What is due after registering?

Once registered, the LLC will owe the annual report, billed at $80 each time.

Which service should handle the registration?

CT Registered Agent.org, because $199 beyond the state fee to register, then $99 each year. After it come Mainstay Filing and Connecticut Registered Agent.co.

More chapters

Bibliography and primary texts

  1. Cited for Connecticut Secretary of the State, Business Services Division: business.ct.gov, edition of August 2026.
  2. Cited for Connecticut Secretary of the State, Business Services Division: business.ct.gov, edition of August 2026.
  3. Cited for Connecticut yearly filing: Annual report: fee, official source: business.ct.gov, edition of October 2026.
  4. Cited for Connecticut report due date: cga.ct.gov, edition of August 2026.
  5. Cited for Connecticut formation fee: Filing fee, official source: business.ct.gov, edition of October 2026.
  6. Cited for Connecticut formation fee: Filing fee, official source: business.ct.gov, edition of October 2026.
  7. Cited for Foreign LLC forms and fees, Business.CT.gov: business.ct.gov, edition of October 2026.
  8. Cited for Foreign Registration Statement form: business.ct.gov, edition of October 2026.
  9. Cited for Foreign investigations penalties: business.ct.gov, edition of October 2026.
  10. Cited for Who can be an agent: business.ct.gov, edition of October 2026.
  11. Cited for Foreign annual report forms and fees: business.ct.gov, edition of October 2026.
  12. pricing page (CT Registered Agent.org), as it stood on November 13, 2026
  13. Connecticut service page (Mainstay Filing), as it stood on November 13, 2026
  14. pricing page (Connecticut Registered Agent.co), as it stood on November 13, 2026