No.1
Our top pick
1. Mainstay Filing: best for the formation, the agent and the annual report under one charge
$199 a year plus the state fee ($319 due at checkout)
Score9.5out of 10
First place: Mainstay Filing. $199 a year buys the Connecticut filing, registered agent service and the annual report, and renewal is $199.
At renewal Mainstay prepares and files the annual report for you. Connecticut charges $80 every year for it, due on or before March 31; Mainstay passes the state fee along at cost.
Its three-year total exceeds CT Registered Agent.org's by $200; the broader coverage outweighs that difference in our scoring.
In the price
- Formation paperwork prepared and lodged
- A full year as your registered agent
- Annual report prepared and filed on your behalf
- EIN application prepared
Why pick it
- Covers the EIN application
- Connecticut's fee is passed along at cost
- One yearly charge of $199 that covers the annual report
- Renews at $199 with nothing added
Weak spots
- Its agent charge after year one is $100 a year above CT Registered Agent.org's
No.2
Best local option
2. CT Registered Agent.org: best for a Connecticut LLC that intends to stay put
$199 to form, then $99 a year for the agent, with the state fee extra
Score9.0out of 10
Second place: CT Registered Agent.org. Its Connecticut formation is $199 plus the state fee, year-one registered agent service included, then $99 a year.
An in-state street address serves as the registered office, and papers served on the company are scanned into your online account.
The annual report lies outside its published prices, so you file it with Connecticut every year.
In the price
- LLC filing done for you
- A first year as your registered agent
Why pick it
- A $199 service charge plus the state filing fee
- The first year as registered agent is free
- Year-two agent charge: $99
Weak spots
- The annual report is not prepared for you
- The EIN application carries a separate fee ($99)
No.3
Lower renewal than Mainstay
3. Connecticut Registered Agent.co: best for a filing made only in Connecticut
$199 to form, then $99 a year for the agent, with the state fee extra
Score8.8out of 10
Third place: Connecticut Registered Agent.co. Its Connecticut formation is $199 plus the state fee, year-one registered agent service included, then $99 a year.
An in-state street address serves as the registered office, and papers served on the company are scanned into your online account.
The annual report lies outside its published prices, so you file it with Connecticut every year.
No difference in price or features separates CT Registered Agent.org from Connecticut Registered Agent.co; choose whichever you prefer.
In the price
- LLC filing done for you
- A first year as your registered agent
Why pick it
- The first year as registered agent is free
- Formation at $199, with the filing fee extra
- $99 a year for the agent from year two
Weak spots
- The annual report is not prepared for you
- The EIN application carries a separate fee ($99)
The 3 rulings in brief
| Rank | Provider | Ruling score | Service charge | Year two | Suited to | Link |
|---|
| 1 | Mainstay Filing | 9.5 | $199 | $199/yr | The formation, the agent and the annual report under one charge | Visit Mainstay FilingPartner link. We may earn money if you buy. |
|---|
| 2 | CT Registered Agent.org | 9.0 | $199 | $99/yr | A Connecticut business holding down its costs | Visit CT Registered Agent.orgPartner link. We may earn money if you buy. |
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| 3 | Connecticut Registered Agent.co | 8.8 | $199 | $99/yr | A Connecticut business holding down its costs | Visit Connecticut Registered Agent.coPartner link. We may earn money if you buy. |
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Every mark out of 10 reflects the editorial team's reading of the criteria on
How we rank, not any customer rating.
Connecticut LLC service charges in 2026: year one, renewals and the three-year total
| Provider | Year one | Year two | Year three | Total over three years | Files the annual report |
|---|
| Mainstay Filing | $199 | $199 | $199 | $597 | Yes |
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| CT Registered Agent.org | $199 | $99 | $99 | $397 | No |
|---|
| Connecticut Registered Agent.co | $199 | $99 | $99 | $397 | No |
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Each charge was taken from the provider's own pages on November 12, 2026. Connecticut's $120 filing fee is payable in addition to every row below and is not in the totals.
How the ruling was reached
Two criteria carry 31% each in this ranking, charge over three years and work taken off the founder. Renewal conduct, fit with local rules and pricing in plain sight share 38%, and in Connecticut the decisive one was work taken off the founder.
Connecticut requires a report every year at a state fee of $80. Mainstay's price includes the filing and CT Registered Agent.org's does not, and that coverage outweighed CT Registered Agent.org's lower three-year cost.
Each criterion and its weight appear on How we rank.
The Connecticut LLC filing fee and form (official figures)
To file the Certificate of Organization with the Connecticut Secretary of State, budget $120. Each provider on this page adds that state fee at cost to its own charge.
Processing time quoted by the state: Most online filings automatically accepted.
Obligations after the Connecticut filing is accepted
File the annual report every year; the date is on or before March 31. $80 goes to the state. Every LLC must name a registered agent with an in-state street address.
Questions on Connecticut LLC services
What does it take, in dollars, to form an LLC in Connecticut?
The state filing fee is $120; service charges run $199.
What is filed to bring the company into existence?
The Certificate of Organization, lodged with the Connecticut Secretary of State.
How long does the state take to process a new Connecticut LLC?
The published standard is Most online filings automatically accepted.
Does a Connecticut LLC have to name a registered agent on its formation paperwork?
Yes. The company names a registered agent when it forms and keeps one on file afterward, with a street address in Connecticut.
Which recurring filings follow formation?
One: the annual report, filed every year, due on or before March 31, at a state fee of $80.
Does the quoted price cover the EIN application?
At Mainstay Filing it does; the application sits inside the yearly price. CT Registered Agent.org and Connecticut Registered Agent.co add $99 for the application. Applying directly with the IRS carries no fee.
Which Connecticut LLC service does the record favor?
Mainstay Filing, since the Connecticut formation, the registered agent and the annual report all fall under one $199 charge.
The record
- Connecticut Secretary of the State, Business Services Division, on the record as of August 2026
- Connecticut Secretary of the State, Business Services Division, on the record as of August 2026
- Connecticut yearly filing: Annual report: fee, official source, on the record as of October 2026
- Connecticut report due date, on the record as of August 2026
- Connecticut formation fee: Filing fee, official source, on the record as of October 2026
- Connecticut formation fee: Filing fee, official source, on the record as of October 2026
- Processing and expedite, official source, on the record as of October 2026
- Exhibit: Mainstay Filing, Connecticut service page, November 12, 2026
- Exhibit: CT Registered Agent.org, pricing and service pages, November 12, 2026
- Exhibit: Connecticut Registered Agent.co, pricing and service pages, November 12, 2026