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Formation Scorecard

LLC service scorecard · Connecticut

3 Best LLC Services in Connecticut (2026)

On the Formation Scorecard 2026 scorecard for LLC services in Connecticut the order reads Mainstay Filing ($199), CT Registered Agent.org ($199) and Connecticut Registered Agent.co ($199). Mainstay Filing posts the top score: $199 a year takes in the formation filing, your registered agent and the annual report, with renewal at $199.
Researched and written by the Formation Scorecard editorial team
Rank #1 Our top pick in Connecticut

1. Mainstay Filing: best for a bundle of formation, agent and annual report

9.3 Editor score out of 10
$199 a year plus the state's fee, $319 due at checkout

Mainstay Filing leads the card: one $199 charge each year bundles the Connecticut formation, the registered agent and the annual report.

Each renewal includes Mainstay's filing of the annual report. Connecticut bills $80 every year for it, due on or before March 31; Mainstay passes the state's fee along at cost.

Mainstay's three-year total sits $200 above CT Registered Agent.org's, which the extra coverage earns back in our scoring.

What you get

  • The LLC formation, handled for you
  • Registered agent service for the full year
  • The annual report, filed for you each time
  • EIN application included

Strengths

  • Renews at $199 with nothing added
  • EIN application bundled in
  • Connecticut's state fee is added at cost
  • One $199 yearly price that also files the annual report

Watch for

  • Its agent renews $100 a year above CT Registered Agent.org
Visit Mainstay FilingPartner link. We may earn money if you buy. Mainstay Filing: the full write-up
Rank #2 Lower renewal than Mainstay

2. CT Registered Agent.org: best for a Connecticut LLC that stays small

8.9 Editor score out of 10
$199 to form, then $99 a year for the agent, state fee extra

CT Registered Agent.org takes second spot: Connecticut formation for $199 beyond the state's fee, with a free first agent year, and $99 a year to keep the agent.

The plan puts the company at an in-state street address and scans papers served on it to your online account.

Its prices leave out the annual report, so you send that filing to Connecticut yourself every year.

What you get

  • Articles prepared and filed
  • First-year registered agent service

Strengths

  • Second-year agent cost: $99
  • Year one as your registered agent is included
  • Forms the LLC for $199 plus the filing fee

Watch for

  • Leaves the annual report with you
  • $99 extra for the EIN application
Visit CT Registered Agent.orgPartner link. We may earn money if you buy. CT Registered Agent.org: the full write-up
Rank #3 Low renewal

3. Connecticut Registered Agent.co: best for staying local in Connecticut

8.6 Editor score out of 10
$199 to form, then $99 a year for the agent, state fee extra

Connecticut Registered Agent.co takes third spot: Connecticut formation for $199 beyond the state's fee, with a free first agent year, and $99 a year to keep the agent.

The plan puts the company at an in-state street address and scans papers served on it to your online account.

Its prices leave out the annual report, so you send that filing to Connecticut yourself every year.

The published prices and features do not separate CT Registered Agent.org from Connecticut Registered Agent.co; choose whichever you like.

What you get

  • Articles prepared and filed
  • First-year registered agent service

Strengths

  • $99 yearly for the agent after year one
  • $199 to form, state fee extra
  • Year one as your registered agent is included

Watch for

  • Leaves the annual report with you
  • $99 extra for the EIN application
Visit Connecticut Registered Agent.coPartner link. We may earn money if you buy. Connecticut Registered Agent.co: the full write-up

The 3 entries on one card

Place Service Card score Service fee Year two Best for Go
1 Mainstay Filing 9.3 $199 $199/yr Formation, agent and annual report together Visit Mainstay FilingPartner link. We may earn money if you buy.
2 CT Registered Agent.org 8.9 $199 $99/yr A Connecticut-only LLC on a tight budget Visit CT Registered Agent.orgPartner link. We may earn money if you buy.
3 Connecticut Registered Agent.co 8.6 $199 $99/yr A Connecticut-only LLC on a tight budget Visit Connecticut Registered Agent.coPartner link. We may earn money if you buy.

The marks out of 10 come from our editors and follow the weights on How we rank; none of them is a customer rating.

Connecticut LLC service cost in 2026: first year, renewal and the three-year tally

Service First year Second year Third year Three-year tally Annual report included
Mainstay Filing $199 $199 $199 $597 Yes
CT Registered Agent.org $199 $99 $99 $397 No
Connecticut Registered Agent.co $199 $99 $99 $397 No

Each price comes from the company's own site, read on November 12, 2026. Add Connecticut's $120 filing fee to each row; the tally above leaves it out.

How the card was marked

Points here: 25% for cost across three years, 25% for coverage of the price and 50% across renewal terms, state-by-state fit and pricing clarity. Connecticut came down to coverage of the price.

Connecticut asks for a report each year at a $80 fee. The Mainstay price covers that filing, while CT Registered Agent.org's leaves it to you, so the coverage points beat CT Registered Agent.org's cost advantage.

Every criterion and weight appears on How we rank.

Connecticut LLC formation: the official fee and form

The Certificate of Organization carries a $120 fee at the Connecticut Secretary of State. Every service here passes that fee through at cost, on top of its own price.

State processing time: Most online filings automatically accepted.

Keeping the Connecticut LLC current

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

Connecticut LLC service: quick questions

How much will an LLC in Connecticut cost to set up?

Expect $120 for the state plus $199 for the service.

What is the name of the formation form?

It is the Certificate of Organization, and the Connecticut Secretary of State receives it.

How quickly does Connecticut process a new LLC?

Per the state: Most online filings automatically accepted.

Must a Connecticut LLC appoint a registered agent when it forms?

Yes. A registered agent with a street address in Connecticut has to be on file from the start.

What does a Connecticut LLC have to file after formation?

One item, the annual report, due every year (on or before March 31) with a $80 fee.

Is the EIN application part of the price?

Mainstay Filing folds it into the yearly price. CT Registered Agent.org and Connecticut Registered Agent.co add $99 for it. Applying for an EIN costs nothing at the IRS itself.

Which LLC service tops the card for Connecticut?

Mainstay Filing, since a $199 yearly price pays for the Connecticut formation, a year of registered agent service and the annual report, then renews at $199.

See also

Where the figures come from

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