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Researched and written by the Launchwise Review editorial team
Launchwise Review

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

Launch guide · Connecticut · LLC service

3 Best LLC Services in Connecticut (2026)

Researched and written by the Launchwise Review editorial team
For a 2026 launch in Connecticut, Launchwise Review grades LLC services this way: Connecticut Registered Agent.co ($199), Mainstay Filing ($199) and CT Registered Agent.org ($199). Connecticut Registered Agent.co earns the top grade here: Connecticut formation at $199 on top of the state fee, year-one registered agent service included, then $99 a year.
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Our top pick

1. Connecticut Registered Agent.co: best for a Connecticut LLC that wants to stay close to home

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

Our mark 9.1 out of 10

Top grade, Connecticut Registered Agent.co: it forms the LLC in Connecticut for $199 over the state's fee, with the registered agent free for year one, and keeps the agent for $99 a year.

You get an in-state street address for the registered office, and any papers served on the company are scanned into your online account.

The annual report is not in its published price, so that task stays on your list with Connecticut, due every year.

On a three-year bill it comes in under Mainstay Filing, and that is a heavily weighted criterion for us.

In the price

  • Formation prepared and filed
  • A first year as your registered agent

Pros

  • $99 each year for the agent from year two
  • Year-one registered agent duty is covered
  • Forms the LLC for $199, state fee extra

Less good

  • No annual report filing in the price
  • EIN application costs extra ($99)
Visit Connecticut Registered Agent.coPartner link. We may earn money if you buy.
Read the Connecticut Registered Agent.co launch review
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Best all-in yearly price

2. Mainstay Filing: best for formation, agent and annual report wrapped into one price

$199 yearly, state fee billed on top ($319 at checkout in all)

Our mark 8.8 out of 10

Next up is Mainstay Filing: the Connecticut formation, your registered agent and the annual report are bundled at $199 a year.

When renewal comes, Mainstay prepares and files the annual report so it is off your list. The Connecticut fee is $80 every year, with a on or before March 31 deadline; Mainstay passes the fee along at cost.

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

In the price

  • Formation paperwork prepared and sent in
  • A full year as your registered agent
  • Annual report, prepared and filed each cycle
  • Your EIN application, done for you

Pros

  • Your EIN application is included
  • Connecticut's fee goes through at cost
  • Renews at $199 without add-ons
  • A single $199 yearly price that covers the annual report

Less good

  • After year one the agent portion is $100 a year above Connecticut Registered Agent.co's
Visit Mainstay FilingPartner link. We may earn money if you buy.
Read the Mainstay Filing launch review
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Best local option

3. CT Registered Agent.org: best for a launch that stays in Connecticut

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

Our mark 8.5 out of 10

Rounding out the list is CT Registered Agent.org: it forms the LLC in Connecticut for $199 over the state's fee, with the registered agent free for year one, and keeps the agent for $99 a year.

You get an in-state street address for the registered office, and any papers served on the company are scanned into your online account.

The annual report is not in its published price, so that task stays on your list with Connecticut, due every year.

Nothing in the published price or features separates Connecticut Registered Agent.co from CT Registered Agent.org; go with whichever you like.

In the price

  • Formation prepared and filed
  • A first year as your registered agent

Pros

  • A $199 service price plus the state fee
  • Year-two agent price: $99
  • Year-one registered agent duty is covered

Less good

  • No annual report filing in the price
  • EIN application costs extra ($99)
Visit CT Registered Agent.orgPartner link. We may earn money if you buy.
Read the CT Registered Agent.org launch review

The 3 grades at a glance

Place Company Launch grade Service price Second year Best fit Go
1 Connecticut Registered Agent.co 9.1 $199 $99/yr A Connecticut launch on a tight budget Visit Connecticut Registered Agent.coPartner link. We may earn money if you buy.
2 Mainstay Filing 8.8 $199 $199/yr Formation, agent and annual report wrapped into one price Visit Mainstay FilingPartner link. We may earn money if you buy.
3 CT Registered Agent.org 8.5 $199 $99/yr A Connecticut launch on a tight budget Visit CT Registered Agent.orgPartner link. We may earn money if you buy.
Each grade out of 10 reflects our editors' reading of the weighted criteria on How we rank, not a customer rating.

Connecticut LLC service cost in 2026: first year, renewals, three-year total

Company Year 1 Year 2 Year 3 Three years, total Files the annual report for you
Connecticut Registered Agent.co $199 $99 $99 $397 No
Mainstay Filing $199 $199 $199 $597 Yes
CT Registered Agent.org $199 $99 $99 $397 No
Prices were copied from each company's own pages on November 12, 2026. Add Connecticut's $120 filing fee to any row; it is not in the totals.

How we graded this list

Launchwise Review puts 26% on cost to launch and stay and 26% on launch paperwork handled, then spreads 48% over renewal behavior, state match and price transparency. For Connecticut, the call came down to cost to launch and stay.

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

Every criterion and weight is listed on How we rank.

Launching in Connecticut: the state filing fee and form

Plan on $120 at the Connecticut Secretary of State when you file the Certificate of Organization. Each company below adds that state fee at cost.

What the state says about turnaround: Most online filings automatically accepted.

Your Connecticut LLC after launch: the upkeep list

Next on the list: the annual report, every year, due on or before March 31. Set aside $80 for the state. Every LLC must name a registered agent with an in-state street address.

Quick answers about Connecticut LLC services

What will it cost to launch an LLC in Connecticut?

The state filing fee is $120; add a service fee of $199.

Which form starts the LLC?

Look for the Certificate of Organization at the Connecticut Secretary of State.

How soon does Connecticut approve a new LLC?

Plan around Most online filings automatically accepted, the state's own standard processing estimate.

Is a registered agent required on the Connecticut formation form?

Yes. You name one on the formation form and keep one on file, with a street address in Connecticut.

What stays on the to-do list after the LLC is launched?

The annual report is the recurring item, filed every year with a on or before March 31 deadline and a $80 state charge.

Will the EIN application be handled in this price?

Mainstay Filing folds it into the yearly price. The application runs $99 at Connecticut Registered Agent.co and CT Registered Agent.org. Founders can also get an EIN from the IRS directly, with no fee.

Which service is the best start for a new Connecticut LLC?

Connecticut Registered Agent.co, because $199 for formation plus the state fee, then $99 yearly for the agent.

Related pages

Sources and dates

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