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LLC Straight Talk What it costs, what you have to file, who's worth paying.

No fluff · Connecticut

3 Best LLC Services in Connecticut (2026) and What Connecticut Really Requires

For LLC formation services in Connecticut in 2026, we'd rank CT Registered Agent.org ($199), Mainstay Filing ($199) and Connecticut Registered Agent.co ($199), best first. Here's the money: $120 to the state, $397 to $597 to a service across three years.
Straight from the LLC Straight Talk editorial team

Quick facts

The short of it
What the state charges
$120, one time
Every year after
$80 every year
Registered agent
Yes, you have to
Our pick
CT Registered Agent.org, Mainstay Filing then Connecticut Registered Agent.co

Connecticut: our ranking

Wondering why this order? We explain it here.

#1 Who we'd call first

1. CT Registered Agent.org: best for owners who'll stay home

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

Three years with it total $397, thanks to a $99 renewal. That's why CT Registered Agent.org is first.

Its three-year total's under Mainstay Filing's, which makes it the first pick for a company that stays put.

Filing the annual report isn't covered, so that job's yours.

What you get

  • Connecticut formation filing
  • The first agent year's on them

Pluses

  • $199 to form the LLC
  • The first agent year's included
  • Agent renews at $99

What's not

  • Doesn't file the annual report
  • EIN's not included ($99)
Go to CT Registered Agent.org Partner link. We may earn money if you buy.
#2 Works in all 50 states

2. Mainstay Filing: best for skipping the annual report

$199 a year, plus the $120 state fee

Mainstay Filing comes in second because one yearly price of $199 covers the formation, the registered agent and every annual report.

CT Registered Agent.org is $200 less over three years, and that's enough to decide the order.

You won't file the annual report yourself. Connecticut still charges $80, billed at cost.

What you get

  • Formation handled start to finish
  • Registered agent for twelve straight months
  • Annual report taken care of when due
  • EIN application
  • State fees at cost

Pluses

  • A flat $199 a year
  • The EIN application's included
  • Year two's $199

What's not

  • $100 a year above CT Registered Agent.org after year one
Go to Mainstay Filing Partner link. We may earn money if you buy.
#3 Connecticut specialist

3. Connecticut Registered Agent.co: best for another in-state choice

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

Three years with it total $397, thanks to a $99 renewal. That puts Connecticut Registered Agent.co third.

Filing the annual report isn't covered, so that job's yours.

Its prices match CT Registered Agent.org exactly, so the order between them's a close call.

What you get

  • Connecticut formation filing
  • The first agent year's on them

Pluses

  • The first agent year's included
  • Agent renews at $99
  • $199 to form the LLC

What's not

  • Doesn't file the annual report
  • EIN's not included ($99)
Go to Connecticut Registered Agent.co Partner link. We may earn money if you buy.

Side by side

#CompanyYear oneThenThree-year totalWhat you get
1 CT Registered Agent.org $199$99/yr$397connecticut formation filing; The first agent year's on them Go to CT Registered Agent.org Partner link. We may earn money if you buy.
2 Mainstay Filing $199$199/yr$597formation handled start to finish; registered agent for twelve straight months; annual report taken care of when due Go to Mainstay Filing Partner link. We may earn money if you buy.
3 Connecticut Registered Agent.co $199$99/yr$397connecticut formation filing; The first agent year's on them Go to Connecticut Registered Agent.co Partner link. We may earn money if you buy.

Prices as of November 13, 2026. The state's own fees are in the checklist below.

The questions that matter

What's it cost to form an LLC here?

$120 goes to the state. Hire a service in year one and that's $199 more.

Add the recurring report and the state's fees reach $280 over three years. go check business.ct.gov, last confirmed October 2026

What do I actually send the state?

The Certificate of Organization goes to the Connecticut Secretary of State, and approval is what creates your LLC.

The law: Conn. Gen. Stat. § 34-247. Wait time: most online filings automatically accepted. go check business.ct.gov, last confirmed October 2026

Do I have to 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.

go check cga.ct.gov, last confirmed October 2026

What do I owe after that?

Set aside $80 each year for the annual report. Put the state's date on your calendar: on or before March 31.

go check business.ct.gov, last confirmed October 2026

Do I have to pay somebody?

Nobody's making you hire anyone. State fees alone run $280 across three years.

A service adds $397 to $597 over three years, and with Mainstay Filing the reports are in that price.

What put number one on top?

CT Registered Agent.org scores best on money out the door in three years, and that test is worth 35%.

Two tests carry most of the weight: money out the door in three years (35%) and jobs the price actually covers (30%).

Mainstay Filing costs $200 more over three years than CT Registered Agent.org, which comes to $397.

How we judge

Connecticut formation rules, with sources

RequirementThe rule or the numberCheck it
Fee to form $120go check business.ct.gov, last confirmed October 2026
Registered agent Yes, you have togo check cga.ct.gov, last confirmed October 2026
Annual report $80 every yeargo check business.ct.gov, last confirmed October 2026
What the state collects in three years $280The rows above, added up

The last row is our math, not the state's: filing fee, plus the reports in years two and three, plus any minimum tax. If a cost has no fixed amount, like a newspaper notice, it's explained above and left out.

More questions

When will my LLC exist?

Most online filings automatically accepted.

Who handles the EIN?

Only Mainstay Filing throws it in. At the others it's $99 (CT Registered Agent.org) and $99 (Connecticut Registered Agent.co).

What do the picks cost over three years?

Over three years you're looking at $397 at CT Registered Agent.org, $597 at Mainstay Filing, $397 at Connecticut Registered Agent.co, before state fees.

Are the fees official?

Each state fee links to its official page, and each service price comes from the company's own site.

Is a service required?

No law says you need a service. It's a convenience you pay for.

Who's first in Connecticut?

CT Registered Agent.org is first: forming costs $199 up front (the agent is covered for year one) and $99 each year after. Then comes Mainstay Filing and Connecticut Registered Agent.co.

What's next

Don't take our word for it

  1. Don't take our word on Connecticut Secretary of the State: business.ct.gov, August 2026, is where it's from, no filter
  2. Don't take our word on Connecticut Secretary of the State: business.ct.gov, August 2026, is where it's from, no filter
  3. Don't take our word on Connecticut yearly filing: Annual report: business.ct.gov, October 2026, is where it's from, no filter
  4. Don't take our word on Connecticut report due date: cga.ct.gov, August 2026, is where it's from, no filter
  5. Don't take our word on Connecticut formation fee: Filing fee: business.ct.gov, October 2026, is where it's from, no filter
  6. Don't take our word on Connecticut formation fee: Filing fee: business.ct.gov, October 2026, is where it's from, no filter
  7. Don't take our word on Processing and expedite, official source: business.ct.gov, October 2026, is where it's from, no filter
  8. CT Registered Agent.org pricing page, read November 13, 2026
  9. Mainstay Filing Connecticut service page, read November 13, 2026
  10. Connecticut Registered Agent.co pricing page, read November 13, 2026