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LLC formation worksheets · Connecticut

3 Best LLC Services in Connecticut (2026): Worked Prices

The 2026 math for Connecticut LLC formation services gives Connecticut Registered Agent.co ($199), CT Registered Agent.org ($199) and Mainstay Filing ($199), ranked best value first. Add up three years of service fees and the rows land between $397 to $597. The $120 filing fee at Connecticut gets added to every row alike.
Worked by the Formation Math editorial team

↓ Sorted by: Rows follow a five-part score in which three-year total counts 42% and coverage 28%

Connecticut in brief

Formation fee $120 business.ct.gov (checked October 2026) as the source
One-year range $199 Provider charges only
Sum of years 1 to 3 $397 to $597 Year one plus two more years
State sum, years 1 to 3 $280 Does not depend on the row
Year the lines meet Does not occur The order stays put for ten years

The Connecticut rows

Ranked by score; every price comes from a company page. The $120 state fee is left out of the rows.

1
Wins on value

1. Connecticut Registered Agent.co: best for bare-bones formations

Year 1: $199. Year 2 on: $99.
Year-1 price $199
Price after year 1 $99/yr
Sum of 3 years $397

Connecticut Registered Agent.co takes row one because three years add up to $397 because the renewal is only $99.

A lower three-year total than Mainstay Filing puts it first, because cost is the heaviest term.

You would still do the annual report yourself.

The price buys

  • Formation handled start to finish
  • Year-one agent service

Adds up

  • $199 plus the state fee
  • No agent charge for year one
  • A small $99 renewal

Does not add up

  • Filing the annual report is left to you
  • EIN application costs $99 more
2
Single-state plan

2. CT Registered Agent.org: best for owners who do their own reports

Year 1: $199. Year 2 on: $99.
Year-1 price $199
Price after year 1 $99/yr
Sum of 3 years $397

CT Registered Agent.org is row 2: three years add up to $397 because the renewal is only $99.

You would still do the annual report yourself.

Connecticut Registered Agent.co publishes the same prices.

The price buys

  • Formation handled start to finish
  • Year-one agent service

Adds up

  • A small $99 renewal
  • No agent charge for year one
  • $199 plus the state fee

Does not add up

  • Filing the annual report is left to you
  • EIN application costs $99 more
3
Nationwide

3. Mainstay Filing: best for upkeep handled for you

Year 1: $199. Renewal: $199. State fee: separate.
Year-1 price $199
Price after year 1 $199/yr
Sum of 3 years $597

Next in the working, Mainstay Filing: no other row folds the annual report into its $199 yearly price.

The $200 gap to Connecticut Registered Agent.co over three years fixes this row's place.

The annual report gets filed too, and the only addition is the state's $80.

The price buys

  • Formation paperwork, done for you
  • Registered agent, covered all year
  • Annual report, filed when due
  • EIN application, handled
  • Government fee passed along with no markup

Adds up

  • EIN application covered
  • Same $199 after the first year
  • Flat at $199 each year

Does not add up

  • Connecticut Registered Agent.co renews for $100 less

Running sum by year

No. Provider Year 1 total Total at year 2 Total at year 3 Total at year 5
1 Connecticut Registered Agent.co $199 $298 $397 $595 Visit Connecticut Registered Agent.co Partner link. We may earn money if you buy.
2 CT Registered Agent.org $199 $298 $397 $595 Visit CT Registered Agent.org Partner link. We may earn money if you buy.
3 Mainstay Filing $199 $398 $597 $995 Visit Mainstay Filing Partner link. We may earn money if you buy.

Read November 13, 2026. Each column gets one more renewal. The totals keep one order for ten years.

Check the math yourself

Pick a number of years and each row's running sum appears; tick the box to add the EIN application for each provider.

Adding up 3 years: Connecticut Registered Agent.co $397, CT Registered Agent.org $397, Mainstay Filing $597. Row with the smallest sum: Connecticut Registered Agent.co.

Connecticut fee schedule

Term Value Where it comes from
Formation charge $120 business.ct.gov (checked October 2026) as the source
Annual report $80 every year business.ct.gov (checked October 2026) as the source
Three-year state total $280 Calculated from the rows above

Working: filing fee, plus the recurring report in years two and three, plus any minimum tax. The sum is the three-year state line.

Notes on the order

Connecticut Registered Agent.co scored above CT Registered Agent.org on three-year total, a 42% term.

Connecticut Registered Agent.co wins the cost term at $397 over three years, against $200 more for Mainstay Filing.

If you need the EIN application, the rows cross in year 2, as Mainstay Filing passes Connecticut Registered Agent.co.

Connecticut LLC filing fee and rules, from the source

$120 is the price of the filing that creates the LLC, the Certificate of Organization, delivered to the Connecticut Secretary of State. Every LLC must name a registered agent with an in-state street address.

Official wording: business.ct.gov (checked October 2026) as the source

If you skip the service

With no service, three years cost $280 in state fees. Each service adds its own row, $397 to $597 over the same period.

Common questions

What does an LLC formation service cost in Connecticut?

Year one costs $199 before the $120 filing fee.

What do the services add up to over three years?

Year one plus two renewals gives $397 to $597.

What is the Connecticut fee to file an LLC?

Filing costs $120, and you submit the Certificate of Organization.

What does Connecticut collect each year after formation?

Annual report at $80 per year, due on or before March 31.

Does the price include the EIN application?

Connecticut Registered Agent.co = $99; CT Registered Agent.org = $99; Mainstay Filing = included.

In what year does one service pass another in total cost?

They stay in the same order for ten years.

Which LLC formation service is best value in Connecticut?

By the five-part score the Connecticut rows run Connecticut Registered Agent.co, CT Registered Agent.org and Mainstay Filing, led by Connecticut Registered Agent.co on three-year total.

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Inputs and sources

  1. Check Connecticut Secretary of the State at business.ct.gov; last read August 2026.
  2. Check Connecticut Secretary of the State at business.ct.gov; last read August 2026.
  3. Check Connecticut yearly filing: Annual report at business.ct.gov; last read October 2026.
  4. Check Connecticut report due date at cga.ct.gov; last read August 2026.
  5. Check Connecticut formation fee: Filing fee at business.ct.gov; last read October 2026.
  6. Check Connecticut formation fee: Filing fee at business.ct.gov; last read October 2026.
  7. The Connecticut Registered Agent.co pricing page supplied the prices on November 13, 2026
  8. The CT Registered Agent.org pricing page supplied the prices on November 13, 2026
  9. The Mainstay Filing Connecticut service page supplied the prices on November 13, 2026