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What forming an LLC costs by state / Connecticut

3 Best LLC Services in Connecticut (2026): What You Pay

Mainstay Filing ($199), CT Registered Agent.org ($199) and Connecticut Registered Agent.co ($199) give you the best value among Connecticut LLC formation services for 2026, in that order. Three years of service fees will cost you $397 to $597, and Connecticut adds its own $120 when you file.
Written by the Price Your LLC editorial team

↓ Ranked for you by: We rank on five things: your spend (38%), your workload (31%) and three smaller ones

What to expect

Fee you pay at filing $120 business.ct.gov (we looked on October 2026, so you can too)
First-year prices $199 Service fees only
Three-year range $397 to $597 First year and both renewals
State total, years 1 to 3 $280 Official amounts only
Prices swap in No crossover No service overtakes another

Connecticut: your options, best value first

Every price is copied from the company's own pricing page. You pay the $120 state fee separately.

1
Best value for you

1. Mainstay Filing: best for never filing the annual report yourself

$199 a year, with $319 due at checkout together with the state fee
You pay in year 1 $199
You pay after year 1 $199/yr
You pay over 3 years $597

Start with Mainstay Filing. One $199 price takes care of formation, registered agent service and every annual report.

CT Registered Agent.org costs $200 less by year three; the 31% weight on work covered still puts this one first.

Preparing the annual report is off your list; you pay just the $80 state fee.

Your price covers

  • Formation handled for you
  • Registered agent for the whole year
  • Annual report, filed on time
  • EIN application prepared for you
  • State fee billed as published

What you get

  • The same $199 after year one
  • Holds at $199
  • The EIN application is taken care of

What to watch

  • $100 more a year than CT Registered Agent.org after year one
2
Connecticut focus

2. CT Registered Agent.org: best for a basic start

$199 to form, $99 yearly after
You pay in year 1 $199
You pay after year 1 $99/yr
You pay over 3 years $397

Spot 2 goes to CT Registered Agent.org: $199 pays for formation and the agent adds $99 yearly afterward.

The annual report is not covered by this price.

Your price covers

  • Articles of organization, filed
  • Agent service for your first year

What you get

  • Then $99 a year
  • No agent charge in year one
  • $199 plus the state fee

What to watch

  • Your price excludes the annual report
  • EIN application adds $99
3
Connecticut focus

3. Connecticut Registered Agent.co: best for owners who prepare their own reports

$199 to form, $99 yearly after
You pay in year 1 $199
You pay after year 1 $99/yr
You pay over 3 years $397

Spot 3 goes to Connecticut Registered Agent.co: $199 pays for formation and the agent adds $99 yearly afterward.

The annual report is not covered by this price.

CT Registered Agent.org lists identical prices.

Your price covers

  • Articles of organization, filed
  • Agent service for your first year

What you get

  • Then $99 a year
  • No agent charge in year one
  • $199 plus the state fee

What to watch

  • Your price excludes the annual report
  • EIN application adds $99

Totals at 1, 2, 3 and 5 years

Pick Service You pay in year 1 You pay by year 2 You pay by year 3 You pay by year 5
1 Mainstay Filing $199 $398 $597 $995 Price out Mainstay Filing Partner link. We may earn money if you buy.
2 CT Registered Agent.org $199 $298 $397 $595 Price out CT Registered Agent.org Partner link. We may earn money if you buy.
3 Connecticut Registered Agent.co $199 $298 $397 $595 Price out Connecticut Registered Agent.co Partner link. We may earn money if you buy.

Company prices from November 13, 2026, added up for you year by year. No service overtakes another within ten years.

Your budget calculator

Tell us how many years you plan to keep the LLC and each service's running total updates; tick the box to add each provider's EIN application.

Your spend for 3 years: Mainstay Filing $597, CT Registered Agent.org $397, Connecticut Registered Agent.co $397. Lowest at that point: CT Registered Agent.org.

What Connecticut charges you (official)

What you pay for Amount Source
Articles filing $120 business.ct.gov (we looked on October 2026, so you can too)
Annual report $80 every year business.ct.gov (we looked on October 2026, so you can too)
State side, 3 years $280 Sum of the lines above

Your three-year bill from the state is made of the filing fee, the reports due in years two and three, and a yearly minimum tax in states that levy one. Anything the state does not put a fixed price on, a newspaper notice for example, is described but never added.

Notes on the order

Mainstay Filing wins upkeep the price covers, worth 31%, with CT Registered Agent.org close behind.

Not having to file the annual report yourself counted for more than CT Registered Agent.org's smaller three-year bill.

Count the EIN application in your budget and Mainstay Filing's total overtakes CT Registered Agent.org's in year 2.

What Connecticut charges you to form an LLC and what it requires

To form it you need the Certificate of Organization, $120, and an address to send both: the Connecticut Secretary of State. Every LLC must name a registered agent with an in-state street address.

In the state's words: business.ct.gov (we looked on October 2026, so you can too)

State fees only

Go it alone and Connecticut still takes $280 over three years, and you complete every form yourself. A service charges $397 to $597 to take that over.

About these prices

How much will an LLC formation service cost me in Connecticut?

$199 in year one, plus the state's $120 filing fee.

What will these services cost me over three years?

$397 to $597 in service fees, with state fees on top.

How much will Connecticut charge me to file an LLC?

Connecticut bills $120 for the Certificate of Organization.

What will Connecticut charge me each year after formation?

The cost that repeats is the annual report, at $80 annually (on or before March 31).

Will the EIN application be part of the price?

Mainstay Filing adds nothing, CT Registered Agent.org adds $99 and Connecticut Registered Agent.co adds $99.

When does one service end up costing more than another?

Not within ten years: the order of the totals stays the same.

Which LLC formation service is the best value for me in Connecticut?

Your options, best value first: Mainstay Filing, CT Registered Agent.org and Connecticut Registered Agent.co.

Related pages

What forming an LLC costs by state for all 50 states Best LLC services for anyone How we rank your options

Where we looked

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