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Filing Verdict

Rankings of registered agents, LLC formation and foreign registration services in all 50 states.

LLC service verdict · Connecticut

3 Best LLC Services in Connecticut (2026)

Filing Verdict's 2026 verdict on LLC services in Connecticut: Connecticut Registered Agent.co ($199), CT Registered Agent.org ($199) and Mainstay Filing ($199), in that order. Connecticut Registered Agent.co takes first place: a $199 formation fee on top of the state's own, then $99 a year for the agent.
The Filing Verdict editorial team
Our top pick in Connecticut
Spot 1

1. Connecticut Registered Agent.co: best for a Connecticut LLC that plans to stay local

Formation $199, then $99 a year for the agent, plus the state fee

9.6Editorial score
out of 10

Connecticut Registered Agent.co wins here: $199 plus the Connecticut filing fee, with the first year of registered agent service included, then $99 a year.

The plan gives the company an in-state street address as its registered office, and papers served on the company are scanned to your online account.

The annual report filing is not in its published prices, so you file it with Connecticut yourself every year.

Over three years it comes in under Mainstay Filing, and cost is one of our two heaviest criteria.

What you get

  • Connecticut formation filed for you
  • A first year of registered agent service

What we like

  • The first registered agent year is included
  • Agent at $99 yearly from year two
  • $199, with the state filing fee on top

Cons

  • Does not take over the annual report
  • The EIN application is billed separately ($99)
Visit Connecticut Registered Agent.coPartner link. We may earn money if you buy. Our full Connecticut Registered Agent.co verdict
Lower renewal than Mainstay
Spot 2

2. CT Registered Agent.org: best for a local Connecticut filing

Formation $199, then $99 a year for the agent, plus the state fee

9.3Editorial score
out of 10

Second place goes to CT Registered Agent.org: $199 plus the Connecticut filing fee, with the first year of registered agent service included, then $99 a year.

The plan gives the company an in-state street address as its registered office, and papers served on the company are scanned to your online account.

The annual report filing is not in its published prices, so you file it with Connecticut yourself every year.

Nothing in the published prices or features divides Connecticut Registered Agent.co from CT Registered Agent.org; pick either.

What you get

  • Connecticut formation filed for you
  • A first year of registered agent service

What we like

  • $199 to file, state fee extra
  • The first registered agent year is included
  • Year-two agent cost of $99

Cons

  • Does not take over the annual report
  • The EIN application is billed separately ($99)
Visit CT Registered Agent.orgPartner link. We may earn money if you buy. Our full CT Registered Agent.org verdict
Best all-in yearly price
Spot 3

3. Mainstay Filing: best for formation, agent and annual report for one price

$199 each year plus the state fee ($319 due at checkout)

9.0Editorial score
out of 10

Third place goes to Mainstay Filing: $199 a year pays for the formation filing, a full year as your registered agent and the annual report, renewing at $199.

Mainstay files the annual report for you as part of the renewal. Connecticut charges $80 every year, due on or before March 31; the state's fee is passed through at cost.

Over three years Connecticut Registered Agent.co is $200 cheaper, which puts Mainstay Filing behind it on cost.

What you get

  • Formation paperwork prepared and filed
  • A full year of registered agent service
  • The annual report, prepared and filed
  • The EIN application

What we like

  • $199 at renewal, nothing extra
  • The EIN application comes with it
  • Connecticut's fee is passed through at cost
  • One $199 yearly price that includes the annual report

Cons

  • From year two its agent costs $100 a year more than Connecticut Registered Agent.co's
Visit Mainstay FilingPartner link. We may earn money if you buy. Our full Mainstay Filing verdict

The 3 verdicts at a glance

No.ServiceVerdict scoreService feeYear twoBest forVisit
1Connecticut Registered Agent.co9.6$199$99/yrA Connecticut-only LLC watching its budget Visit Connecticut Registered Agent.coPartner link. We may earn money if you buy.
2CT Registered Agent.org9.3$199$99/yrA Connecticut-only LLC watching its budget Visit CT Registered Agent.orgPartner link. We may earn money if you buy.
3Mainstay Filing9.0$199$199/yrFormation, agent and annual report, one price Visit Mainstay FilingPartner link. We may earn money if you buy.
Scores come from Filing Verdict's editors, out of 10, using the criteria explained on How we rank; they are not customer ratings.

Connecticut LLC service prices for 2026: year one, renewals and three years

ServiceYear 1Year 2Year 3Total, 3 yearsAnnual report handled for you
Connecticut Registered Agent.co$199$99$99$397No
CT Registered Agent.org$199$99$99$397No
Mainstay Filing$199$199$199$597Yes
Prices were read from each company's own pages on November 12, 2026. Connecticut's $120 filing fee goes on top of every row and is not counted in these totals.

The reasoning behind the order

Two criteria lead Filing Verdict's method at 35% apiece: total over three years and paperwork the price handles. Renewal behavior, match to the state and up-front pricing share the other 30%, and Connecticut came down to total over three years.

Connecticut Registered Agent.co totals $397 over three years, $200 under Mainstay Filing. Mainstay would also file the annual report, but an owner can file it alone for the state fee, so the lower price carried this page.

The full list of criteria and weights is on How we rank.

Connecticut LLC filing fee and form: official figures

Filing the Certificate of Organization costs $120 at the Connecticut Secretary of State. Each service on this page adds that fee on top of its own price, at cost.

Standard turnaround from the state: Most online filings automatically accepted.

Connecticut LLC upkeep after the filing

The annual report is filed every year, due on or before March 31. The state fee is $80. Every LLC must name a registered agent with an in-state street address.

Connecticut LLC service: questions answered

What does it cost to form an LLC in Connecticut?

The state filing fee is $120, and the service fee is $199.

Which form do I file to create the LLC?

You file the Certificate of Organization with the Connecticut Secretary of State.

How long does Connecticut take to approve a new LLC?

The state's standard processing time: Most online filings automatically accepted.

Does a Connecticut LLC have to name a registered agent?

Yes. Connecticut requires every LLC to keep a registered agent on file, and the agent needs a street address in the state.

Which yearly filings does a Connecticut LLC owe?

Just the annual report, every year, due on or before March 31 ($80 state fee).

Does the price include the EIN application?

Mainstay Filing includes it in the yearly price. Connecticut Registered Agent.co and CT Registered Agent.org bill $99 extra. The IRS charges nothing for an EIN.

Which LLC service is the best pick in Connecticut?

Connecticut Registered Agent.co, because Connecticut formation at $199 over the state's fee, year-one registered agent service included and $99 a year to keep the agent.

More from us

Sources and dates

  1. Connecticut Secretary of the State, Business Services Division, confirmed August 2026
  2. Connecticut Secretary of the State, Business Services Division, confirmed August 2026
  3. Connecticut yearly filing: Annual report: fee, official source, confirmed October 2026
  4. Connecticut report due date, confirmed August 2026
  5. Connecticut formation fee: Filing fee, official source, confirmed October 2026
  6. Connecticut formation fee: Filing fee, official source, confirmed October 2026
  7. Processing and expedite, official source, confirmed October 2026
  8. Checked November 12, 2026: Connecticut Registered Agent.co, pricing and service pages
  9. Checked November 12, 2026: CT Registered Agent.org, pricing and service pages
  10. Checked November 12, 2026: Mainstay Filing, Connecticut service page