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

Unpacked · Connecticut

3 Best LLC Services in Connecticut (2026): What Is Inside Each

In Connecticut for 2026, unpack LLC formation services in this order: CT Registered Agent.org ($199), Connecticut Registered Agent.co ($199) and Mainstay Filing ($199). Inside the cost: $120 goes to the state, and three years of service add $397 to $597.
Unpacked by the LLC Unpacked editorial team

Top layer

State filing fee
$120, paid once
Next layer
$80 yearly
Registered agent
Yes, by law
Our pick
CT Registered Agent.org, Connecticut Registered Agent.co then Mainstay Filing

Connecticut: ranked

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

1. CT Registered Agent.org: best for a business that stays in one state

$199 to form; renewal $99

What puts CT Registered Agent.org first: its $99 renewal brings three years to $397.

Cost decides it: the three-year total here is under Mainstay Filing's.

You still file the annual report yourself.

Inside the price

  • The LLC, filed for you
  • A first year of agent service

Inside, the good

  • Agent renews at $99
  • A first year of agent service is inside
  • $199 plus the state fee to form

Inside, the catch

  • Nothing inside covers the annual report
  • The EIN application costs $99 extra
The Connecticut specialist

2. Connecticut Registered Agent.co: best for another in-state option

$199 to form; renewal $99

Connecticut Registered Agent.co lands second, and its $99 renewal brings three years to $397.

You still file the annual report yourself.

It charges what CT Registered Agent.org charges.

Inside the price

  • The LLC, filed for you
  • A first year of agent service

Inside, the good

  • A first year of agent service is inside
  • Agent renews at $99
  • $199 plus the state fee to form

Inside, the catch

  • Nothing inside covers the annual report
  • The EIN application costs $99 extra
Holds up anywhere

3. Mainstay Filing: best for owners who want upkeep handled

Annual price $199, renewal price $199, state fee extra

What puts Mainstay Filing third: $199 a year packs in formation, the registered agent and every annual report.

A $200 three-year gap to CT Registered Agent.org explains the lower spot.

Inside the service is the annual report, filed for you, with Connecticut's $80 passed through at cost.

Inside the price

  • Formation filed with the state
  • Registered agent across the full year
  • Annual report filed on your behalf
  • EIN application
  • State fees at cost

Inside, the good

  • Stays at $199
  • A flat $199 a year, all inside
  • The EIN application is inside the price

Inside, the catch

  • $100 a year above CT Registered Agent.org after year one

Inside each price

#CompanyOpening priceRenewalThree-year totalCovers
1CT Registered Agent.org$199$99/yr$397The LLC, filed for you; A first year of agent serviceOpen CT Registered Agent.orgPartner link. We may earn money if you buy.
2Connecticut Registered Agent.co$199$99/yr$397The LLC, filed for you; A first year of agent serviceOpen Connecticut Registered Agent.coPartner link. We may earn money if you buy.
3Mainstay Filing$199$199/yr$597formation filed with the state; registered agent across the full year; annual report filed on your behalfOpen Mainstay FilingPartner link. We may earn money if you buy.
Read November 13, 2026. Three years means year one plus two renewals.

Layer by layer

How much does forming an LLC cost in this state?

$120 is the state's share. Add $199 if a service files in year one.

Across three years the state collects $280, filing fee included. business.ct.gov holds the original, confirmed October 2026

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

The Connecticut Secretary of State receives the Certificate of Organization, and once it is approved the company exists.

Statute: Conn. Gen. Stat. § 34-247. Expect this wait: most online filings automatically accepted. business.ct.gov holds the original, confirmed October 2026

Must the LLC name a registered agent?

Every LLC must name a registered agent with an in-state street address.

A Connecticut resident, or a business entity formed in Connecticut or registered there. The agent signs to accept the appointment.

cga.ct.gov holds the original, confirmed October 2026

What is owed in later years?

Year after year the recurring job is the annual report: yearly, costing $80. The calendar line from the state reads on or before March 31.

business.ct.gov holds the original, confirmed October 2026

Can I file it myself instead of hiring a service?

Yes. Filing on your own costs only the state's fees, $280 over three years.

That $397 to $597 over three years is the price of handing off the paperwork and the agent role.

Why is the stack in this order?

CT Registered Agent.org is strongest on total across three years, a layer worth 34% of the score.

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%).

CT Registered Agent.org stacks up to $397 over three years, $200 under Mainstay Filing.

The five layers

Connecticut formation, unpacked

PartAmount or rulePeek at source
LLC filing fee$120business.ct.gov holds the original, confirmed October 2026
Registered agentYes, by lawcga.ct.gov holds the original, confirmed October 2026
Annual report$80 every yearbusiness.ct.gov holds the original, confirmed October 2026
State fees, years one to three$280The rows above, stacked
The last row stacks the filing fee, the reports in years two and three and any minimum tax. A cost with no fixed amount, such as a newspaper notice, is explained above and kept out of the sum.

More boxes to open

How long does the state take?

Most online filings automatically accepted.

Is the EIN application inside the price?

Only Mainstay Filing packs it in. Elsewhere it is $99 at CT Registered Agent.org and $99 at Connecticut Registered Agent.co.

How do the three-year totals compare?

Opened up over three years: CT Registered Agent.org at $397, Connecticut Registered Agent.co at $397, Mainstay Filing at $597, with state fees on top.

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.

Which LLC service should I open first in Connecticut?

CT Registered Agent.org is on top: forming costs $199, and the agent is covered in year one, then $99 a year. Under it sit Connecticut Registered Agent.co and Mainstay Filing.

Originals behind this page

  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 Processing and expedite, official source led us to business.ct.gov, confirmed October 2026, which you can open yourself
  8. The CT Registered Agent.org pricing page, opened November 13, 2026
  9. The Connecticut Registered Agent.co pricing page, opened November 13, 2026
  10. The Mainstay Filing Connecticut service page, opened November 13, 2026