Connecticut board, ranked
Service prices only. The $120 state fee applies to every quote.
1. Mainstay Filing: best for upkeep you can ignore
Best reading
$199 yearly, $319 due at checkout with the state fee
- Opening quote
- $199
- Quote from year 2
- $199/yr
- Reading at year 3
- $597
Mainstay Filing reads best in Connecticut: $199/yr includes the annual report, with no movement at renewal.
The $200 premium over Connecticut Registered Agent.co at year three buys coverage, and coverage decides this ranking.
Connecticut bills $80 for the annual report, and the service passes that fee through at cost.
Quote includes
- Formation delivered to the state office
- Registered agent, for twelve months
- Annual report, filed as it falls due
- The EIN application, prepared
- Official fee, nothing added
Reads well
- $199 for the full bundle
- Renewal holds at $199
- It prepares the EIN application
Reads poorly
- Connecticut Registered Agent.co renews for $100 less
2
2. Connecticut Registered Agent.co: best for no-frills formations
One-state plan
Opening $199; later years $99
- Opening quote
- $199
- Quote from year 2
- $99/yr
- Reading at year 3
- $397
Next on the board, Connecticut Registered Agent.co: $199 in the first year, $99 in every year after.
Its quote stops short of the annual report.
Quote includes
- The Connecticut formation filing
- Agent service for the first year
Reads well
- Then $99 a year
- Formation quoted at $199
- Agent included to start
Reads poorly
- Annual report is not part of the quote
- EIN add-on: $99
3
3. CT Registered Agent.org: best for a second in-state filer
One-state plan
Opening $199; later years $99
- Opening quote
- $199
- Quote from year 2
- $99/yr
- Reading at year 3
- $397
Next on the board, CT Registered Agent.org: $199 in the first year, $99 in every year after.
Its quote stops short of the annual report.
Quote for quote, it ties Connecticut Registered Agent.co.
Quote includes
- The Connecticut formation filing
- Agent service for the first year
Reads well
- Formation quoted at $199
- Agent included to start
- Then $99 a year
Reads poorly
- Annual report is not part of the quote
- EIN add-on: $99
Readings over time
Sampled November 13, 2026. Each column picks up one more renewal. No break-even appears inside ten years.
Run your own reading
Change the years to take a new reading, with the EIN application as an option.
State fees with citations
The three-year state reading adds the filing fee, the reports due in years two and three and any yearly minimum tax. Costs with no fixed amount, such as newspaper publication, are noted but not summed.
Notes on the order
For Connecticut, the deciding term was filings handled per dollar (30% of the ranking), where Mainstay Filing came out ahead.
Filings handled per dollar tipped it: the annual report is inside the quote.
If you need the EIN application, the quotes cross in year 2, as Mainstay Filing passes Connecticut Registered Agent.co.
Connecticut LLC filing fee and requirements, quoted from the source
The Certificate of Organization, plus $120, is delivered to the Connecticut Secretary of State (Conn. Gen. Stat. § 34-247). Every LLC must name a registered agent with an in-state street address.
Cited at: business.ct.gov (logged October 2026) for the record
Filing it yourself, measured
With no service, three years read $280 in state fees. Each service adds its own quote, $397 to $597 over the same period.
Connecticut price questions, answered
What do LLC formation services charge in Connecticut?
The quotes charge $199 up front, and the state adds $120.
What do the quotes add up to over three years?
$397 to $597 across the quotes, not counting state fees.
How much does Connecticut take to file an LLC?
$120 paid to the state, via the Certificate of Organization.
What does Connecticut bill each year after formation?
Annual report: $80 a year, with the deadline stated as on or before March 31.
Is the EIN application part of the quote?
It varies by quote: Mainstay Filing (included), Connecticut Registered Agent.co ($99) and CT Registered Agent.org ($99).
When does one quote pass another in total cost?
Not in ten years: the order of the cumulative costs does not change.
Which LLC formation service ranks best in Connecticut?
By the five-part test the Connecticut quotes run Mainstay Filing, Connecticut Registered Agent.co and CT Registered Agent.org, led by Mainstay Filing on filings handled per dollar.
Logged references
- Connecticut Secretary of the State: see business.ct.gov, sampled August 2026.
- Connecticut Secretary of the State: see business.ct.gov, sampled August 2026.
- Connecticut yearly filing: Annual report: see business.ct.gov, sampled October 2026.
- Connecticut report due date: see cga.ct.gov, sampled August 2026.
- Connecticut formation fee: Filing fee: see business.ct.gov, sampled October 2026.
- Connecticut formation fee: Filing fee: see business.ct.gov, sampled October 2026.
- November 13, 2026 sample from the Mainstay Filing Connecticut service page
- November 13, 2026 sample from the Connecticut Registered Agent.co pricing page
- November 13, 2026 sample from the CT Registered Agent.org pricing page