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LLC UnpackedEvery filing, unpacked: the fee, the form, the catch.

What is inside · Connecticut

3 Best Foreign Registration Services in Connecticut (2026), Opened Up

Opened up for 2026, the foreign registration services in Connecticut rank Mainstay Filing ($199), Connecticut Registered Agent.co ($199) and CT Registered Agent.org ($199), best on top. Two parts make up the bill: $120 to register and $397 to $497 to a service over three years.
Unpacked by the LLC Unpacked editorial team

Top layer

Registration fee
$120
Certificate from home?
Yes, include it (90 day age cap)
Afterward
$80, annual report
Top of the stack
Mainstay Filing, Connecticut Registered Agent.co then CT Registered Agent.org

Our Connecticut picks, opened up

Curious about the order? The method is here.
Top of the stack

1. Mainstay Filing: best for adding state after state

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

Mainstay Filing sits on top in Connecticut because the price is $199 in every state, and the first registered agent year is inside it.

Is it the smallest bill? No. Connecticut Registered Agent.co costs $100 less over three years, but only in Connecticut.

The registered agent is not charged in year one and costs $149 a year after that, in any state.

Inside the price

  • Out-of-state registration filed
  • Registered agent, waived for the first year
  • The same fee in all fifty states

Inside, the good

  • The first agent year is inside
  • All fifty states
  • $199 to file

Inside, the catch

  • Connecticut Registered Agent.co renews its agent $50 lower
Connecticut only

2. Connecticut Registered Agent.co: best for adding only this state

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

Connecticut Registered Agent.co sits second because registering costs $199 over the state fee, with the agent covered in year one, then $99 a year.

Inside the price

  • Connecticut registration filing
  • A first year of agent service

Inside, the good

  • $199 plus the state fee
  • $99 a year from year two
  • A free agent year at the start

Inside, the catch

  • Connecticut only, so the home state needs its own agent
Connecticut only

3. CT Registered Agent.org: best for one added state, no more

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

CT Registered Agent.org sits third because registering costs $199 over the state fee, with the agent covered in year one, then $99 a year.

It charges what Connecticut Registered Agent.co charges.

Inside the price

  • Connecticut registration filing
  • A first year of agent service

Inside, the good

  • $199 plus the state fee
  • $99 a year from year two
  • A free agent year at the start

Inside, the catch

  • Connecticut only, so the home state needs its own agent

Inside each price

#CompanyOpening priceEach year afterThree-year totalCovers
1Mainstay Filing$199$149/yr$497Out-of-state registration filed; registered agent, waived for the first year; the same fee in all fifty statesOpen Mainstay FilingPartner link. We may earn money if you buy.
2Connecticut Registered Agent.co$199$99/yr$397connecticut registration filing; A first year of agent serviceOpen Connecticut Registered Agent.coPartner link. We may earn money if you buy.
3CT Registered Agent.org$199$99/yr$397connecticut registration filing; A first year of agent serviceOpen CT Registered Agent.orgPartner link. We may earn money if you buy.
Service fees only, from company prices read November 13, 2026. State fees are the same whichever pick you open.

Opened up, question by question

When must an out-of-state LLC register here?

Any LLC formed elsewhere should file its registration with the Connecticut Secretary of the State, Business Services Division ahead of its first Connecticut transaction.

Inside the risk of skipping it: fees it should have paid before registering.

peek at business.ct.gov, confirmed October 2026

How much does registration cost?

The state charges $120, and a service adds $199.

Over three years the state's fees reach $280, counting any recurring report. peek at business.ct.gov, confirmed October 2026

Which form is inside the filing, and where does it go?

You open one form, the Foreign Registration Statement, Limited Liability, and send it to the Connecticut Secretary of the State, Business Services Division.

Attach certificate of existence (certificate of good standing) from the state of formation dated no earlier than 90 days.

What is due after the LLC registers?

Expect the annual report ($80).

In the state's words, the date is Between January 1 and March 31.

What put number one on top?

On what is inside the price (29%), Mainstay Filing comes out ahead.

Five layers set the order: total across three years (34%), what is inside the price (29%), price laid out in the open (14%), how the renewal behaves (12%) and how far it reaches (11%).

An LLC registering out of state already works in two states, and the first pick can serve both.

The five layers

Connecticut: the registration checklist

PartAmount or rulePeek at source
Registration fee$120peek at business.ct.gov, confirmed October 2026
Good standing certificateYes, include it, 90 dayspeek at business.ct.gov, confirmed October 2026
Annual report$80peek at business.ct.gov, confirmed October 2026
What the state collects in three years$280The rows above, stacked
Last row = filing fee + two later reports + minimum tax, if the state has one. Variable costs are described in the text, not added.

Also worth asking

Do I still need an agent in my home state?

Most likely. Each state wants an agent of its own, and while a one-state service covers only one of them, Mainstay Filing covers every state.

How do the three-year totals compare?

Opened up over three years: Mainstay Filing at $497, Connecticut Registered Agent.co at $397, CT Registered Agent.org at $397, before state fees.

What do these numbers rest on?

The state-side figures were taken from Connecticut's own publications, and the service prices from the price page each company posts. Dates for both appear on this page.

Do I have to use a service?

Not required. The state takes filings from owners.

Will a service file the registration for me?

Yes. You hand over the details and the company files; the state's charge does not change with the company.

What is the best foreign registration service for Connecticut?

Mainstay Filing is on top: the fee is $199 on top of Connecticut's own, the registered agent is waived at first, and it settles at $149 a year. Under it sit Connecticut Registered Agent.co and CT Registered Agent.org.

What the page rests on

  1. Unpacking Connecticut Secretary of the State led us to business.ct.gov, confirmed August 2026, which you can open yourself
  2. Unpacking Connecticut Secretary of the State led us to business.ct.gov, confirmed August 2026, which you can open yourself
  3. Unpacking Connecticut yearly filing: Annual report led us to business.ct.gov, confirmed October 2026, which you can open yourself
  4. Unpacking Connecticut report due date led us to cga.ct.gov, confirmed August 2026, which you can open yourself
  5. Unpacking Connecticut formation fee: Filing fee led us to business.ct.gov, confirmed October 2026, which you can open yourself
  6. Unpacking Connecticut formation fee: Filing fee led us to business.ct.gov, confirmed October 2026, which you can open yourself
  7. Unpacking Foreign LLC forms and fees led us to business.ct.gov, confirmed October 2026, which you can open yourself
  8. Unpacking Foreign Registration Statement form led us to business.ct.gov, confirmed October 2026, which you can open yourself
  9. Unpacking Foreign investigations penalties led us to business.ct.gov, confirmed October 2026, which you can open yourself
  10. Unpacking Who can be an agent led us to business.ct.gov, confirmed October 2026, which you can open yourself
  11. Unpacking Foreign annual report forms and led us to business.ct.gov, confirmed October 2026, which you can open yourself
  12. Mainstay Filing Connecticut service page, read November 13, 2026
  13. Connecticut Registered Agent.co pricing page, read November 13, 2026
  14. CT Registered Agent.org pricing page, read November 13, 2026