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LLC price index · Connecticut

3 Best LLC Services in Connecticut (2026): Price Index

The index for 2026 puts CT Registered Agent.org ($199), Mainstay Filing ($199) and Connecticut Registered Agent.co ($199) at the top of the Connecticut LLC formation services ledger, in that order. The three-year column runs $397 to $597. Connecticut's filing fee, $120, is the same on every line.
Entries by the LLC Price Index editorial team

Index basis: Weighted index: cost over three years counts 38%, coverage per dollar 32%

The Connecticut tally

Filing fee at the state$120business.ct.gov (read October 2026) per the state
Opening range$199Service lines only
Cumulative to year 3$397 to $597Opening price + two renewals
State fees through year 3$280Whoever files
Year of crossoverDoes not happenStable for a decade

Connecticut ledger, best value first

Ordered by our value index. No line includes the $120 state fee.
1

1. CT Registered Agent.org: best for bare-bones formations

Index leader
First year$199
Years 2 and on$99/yr
Three-year sum$397
First year $199; later years $99

Best value in Connecticut is CT Registered Agent.org: $199 to form with the agent included for year one, $99 a year afterward.

Its three-year subtotal is under Mainstay Filing's, and three-year cost carries 38% of the index.

The annual report is not part of its price.

Line includes

  • The filing made on your behalf
  • Agent service in year one

Credits

  • Opens at $199
  • Year-one agent covered in the price
  • $99 yearly from year two

Debits

  • The annual report sits outside the price
  • The EIN application is not included ($99)
2

2. Mainstay Filing: best for upkeep you never touch

The bundle
First year$199
Years 2 and on$199/yr
Three-year sum$597
$199/yr, plus $120 to the state

Mainstay Filing is line 2: a single $199 yearly line buys formation, registered agent and every annual report.

CT Registered Agent.org subtotals $200 lower across three years, enough to index ahead.

Filing each annual report is part of the service; the state's $80 is billed at cost.

Line includes

  • The LLC filing
  • Registered agent for the full year
  • Annual report, prepared and filed
  • The EIN application
  • State fee billed at cost, no markup

Credits

  • Second-year price: $199
  • One yearly price, $199
  • No separate EIN fee

Debits

  • CT Registered Agent.org's renewal is $100 smaller
3

3. Connecticut Registered Agent.co: best for a local formation service

Single-state plan
First year$199
Years 2 and on$99/yr
Three-year sum$397
First year $199; later years $99

Connecticut Registered Agent.co fills line 3: $199 to form with the agent included for year one, $99 a year afterward.

The annual report is not part of its price.

Its figures are identical to CT Registered Agent.org's.

Line includes

  • The filing made on your behalf
  • Agent service in year one

Credits

  • Year-one agent covered in the price
  • $99 yearly from year two
  • Opens at $199

Debits

  • The annual report sits outside the price
  • The EIN application is not included ($99)

Subtotals after 1, 2, 3 and 5 years

LineProviderTotal, year 1Total, year 2Total, year 3Total, year 5
1CT Registered Agent.org$199$298$397$595Visit CT Registered Agent.orgPartner link. We may earn money if you buy.
2Mainstay Filing$199$398$597$995Visit Mainstay FilingPartner link. We may earn money if you buy.
3Connecticut Registered Agent.co$199$298$397$595Visit Connecticut Registered Agent.coPartner link. We may earn money if you buy.
Dated November 13, 2026. Every further column adds one more renewal. The lines never cross within ten years.

Subtotal calculator

Subtotals for 1 to 5 years, with or without the EIN application. State fees are omitted because every line carries the same ones.
Running subtotals after 3 years: CT Registered Agent.org $397, Mainstay Filing $597, Connecticut Registered Agent.co $397. Least paid: CT Registered Agent.org.

Official state charges

EntryAmountCited from
Filing the LLC$120business.ct.gov (read October 2026) per the state
Annual report$80 every yearbusiness.ct.gov (read October 2026) per the state
State total, years 1 to 3$280Filing + reports + any tax
Every state line cites the official source beside it. The 3-year subtotal adds filing, reports in years 2 and 3 and any minimum tax.

Index notes

Three-year cost index settled line one. That column is 38% of the index; coverage per dollar, renewal step, crossover year and price transparency make up the rest.

On the three-year column CT Registered Agent.org sits at $397, which leaves a $200 gap to Mainstay Filing.

If you need the EIN application, the lines cross in year 2, with Mainstay Filing passing CT Registered Agent.org.

Official Connecticut LLC filing fee and requirements

An LLC comes into being once the Connecticut Secretary of State accepts the Certificate of Organization and $120. Every LLC must name a registered agent with an in-state street address.

Quoted from: business.ct.gov (read October 2026) per the state

The no-service line

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

Quick answers

How much does LLC formation service cost in Connecticut?

$199 in year one among our lines, plus the $120 state fee.

What is the three-year subtotal for these services?

$397 to $597 in service fees, state charges excluded.

What fee does Connecticut charge to file an LLC?

$120 when you submit the Certificate of Organization.

What does Connecticut charge after the first year?

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

Does any line include the EIN application?

$99 extra with CT Registered Agent.org, included with Mainstay Filing and $99 extra with Connecticut Registered Agent.co.

When does one line pass another in total cost?

No crossover point inside ten years.

Which LLC formation service indexes best in Connecticut?

By our value index, the Connecticut lines run CT Registered Agent.org, Mainstay Filing and Connecticut Registered Agent.co. CT Registered Agent.org leads on three-year cost index.

More ledgers

Source lines

  1. August 2026 confirmation of Connecticut Secretary of the State at business.ct.gov.
  2. August 2026 confirmation of Connecticut Secretary of the State at business.ct.gov.
  3. October 2026 confirmation of Connecticut yearly filing: Annual report at business.ct.gov.
  4. August 2026 confirmation of Connecticut report due date at cga.ct.gov.
  5. October 2026 confirmation of Connecticut formation fee: Filing fee at business.ct.gov.
  6. October 2026 confirmation of Connecticut formation fee: Filing fee at business.ct.gov.
  7. Ledger input from the CT Registered Agent.org pricing page, November 13, 2026
  8. Ledger input from the Mainstay Filing Connecticut service page, November 13, 2026
  9. Ledger input from the Connecticut Registered Agent.co pricing page, November 13, 2026