Explained · Connecticut
3 Best LLC Services in Connecticut (2026) and Why
The essentials
- State filing charge
- $120, at filing only
- After formation
- $80 annually
- Registered agent
- Mandatory
- Where we would start
- Connecticut Registered Agent.co, Mainstay Filing then CT Registered Agent.org
The Connecticut shortlist
Prices come from each company's own pricing page. The ranking is explained on how we pick.1. Connecticut Registered Agent.co: best for budget-minded owners
$199 to form, then $99 a year
Connecticut Registered Agent.co is where we would start in Connecticut. In short, you pay $199 at the start with the first agent year included and $99 annually after that.
Of the two, it has the lower three-year cost, and that is the first thing we weigh.
Handling the annual report stays with you.
Includes
- Your Connecticut formation filing
- Agent included for the first year
Points in its favor
- A formation fee of $199
- No agent fee in year one
- $99 annually after that
Where it falls short
- The annual report is not covered
- An EIN application is $99 more
2. Mainstay Filing: best for paperwork taken off your hands
$199 per year ($319 at signup including the state fee)
Our second recommendation, Mainstay Filing, earns it since one yearly price of $199 handles the filing, serves as the registered agent and files the annual report, and it renews at $199.
Three years cost $200 more here than at Connecticut Registered Agent.co.
It prepares each annual report and adds the $80 fee the state sets, with no markup.
Includes
- The formation filing
- Registered agent for the whole year
- Annual report prepared and filed for you
- An EIN, applied for
- Official fees at cost
Points in its favor
- One yearly price: $199
- EIN application is part of the package
- Costs $199 when it renews
Where it falls short
- Carries a $100 annual premium over Connecticut Registered Agent.co
3. CT Registered Agent.org: best for a second local choice
$199 to form, then $99 a year
CT Registered Agent.org ranks third. In short, you pay $199 at the start with the first agent year included and $99 annually after that.
Handling the annual report stays with you.
The prices match Connecticut Registered Agent.co, so pick the one you prefer.
Includes
- Your Connecticut formation filing
- Agent included for the first year
Points in its favor
- $99 annually after that
- A formation fee of $199
- No agent fee in year one
Where it falls short
- The annual report is not covered
- An EIN application is $99 more
Compare prices
| # | Pick | First-year price | Each year after | Total, 3 years | Covers | |
|---|---|---|---|---|---|---|
| 1 | Connecticut Registered Agent.co | $199 | $99/yr | $397 | Your Connecticut formation filing; agent included for the first year | See Connecticut Registered Agent.coPartner link. We may earn money if you buy. |
| 2 | Mainstay Filing | $199 | $199/yr | $597 | the formation filing; registered agent for the whole year; annual report prepared and filed for you | See Mainstay FilingPartner link. We may earn money if you buy. |
| 3 | CT Registered Agent.org | $199 | $99/yr | $397 | Your Connecticut formation filing; agent included for the first year | See CT Registered Agent.orgPartner link. We may earn money if you buy. |
Key questions
What will forming an LLC cost me?
Set aside $120 for the state and $199 for a service.
Counting the recurring report, the state collects $280 in the first three years. business.ct.gov, confirmed October 2026
Which form do I file, and with whom?
A single filing forms the LLC: the Certificate of Organization, sent to the Connecticut Secretary of State.
Statute: Conn. Gen. Stat. § 34-247. How long the state says it takes: most online filings automatically accepted. business.ct.gov, confirmed October 2026
Must I have a registered agent?
Every LLC must name a registered agent with an in-state street address.
A Connecticut resident, or a business entity formed in Connecticut or registered there. The agent signs to accept the appointment.
cga.ct.gov, confirmed October 2026
What is due in later years?
One filing repeats: the annual report, once a year, costing $80. Filings fall due on or before March 31, a date worth noting down.
business.ct.gov, confirmed October 2026
Can I skip the service?
No service is required. On your own, three years of state fees total $280.
A service adds $397 to $597 over three years to do the filings and, with Mainstay Filing, the reports.
What decided the ranking?
The deciding factor is what three years cost (34% of the weight), where Connecticut Registered Agent.co is strongest.
What three years cost carries 34% and how much work the price handles carries 28%. Three smaller criteria decide close calls.
Over three years Connecticut Registered Agent.co totals $397, which is $200 below Mainstay Filing.
What Connecticut requires
| What it covers | Detail | Reference |
|---|---|---|
| State charge to form | $120 | business.ct.gov, confirmed October 2026 |
| Registered agent | Mandatory | cga.ct.gov, confirmed October 2026 |
| Annual report | $80 every year | business.ct.gov, confirmed October 2026 |
| Paid to the state in three years | $280 | The rows above, added |
FAQ
How long does the state take?
Most online filings automatically accepted.
Is the EIN covered?
Applying for an EIN costs $99 with Connecticut Registered Agent.co or $99 with CT Registered Agent.org, and nothing extra with Mainstay Filing.
How much is each one after three years?
$397 with Connecticut Registered Agent.co, $597 with Mainstay Filing, $397 with CT Registered Agent.org, and state fees come extra.
Where do the numbers come from?
Each state fee links to its official source, and each service price comes from the company's website.
Is a service required?
No law demands one. A service is a convenience.
Which one should I choose in Connecticut?
Connecticut Registered Agent.co ranks first on what three years cost, ahead of Mainstay Filing and CT Registered Agent.org.
Official sources and price pages
- August 2026 confirmation of Connecticut Secretary of the State at business.ct.gov
- August 2026 confirmation of Connecticut Secretary of the State at business.ct.gov
- October 2026 confirmation of Connecticut yearly filing: Annual report at business.ct.gov
- August 2026 confirmation of Connecticut report due date at cga.ct.gov
- October 2026 confirmation of Connecticut formation fee: Filing fee at business.ct.gov
- October 2026 confirmation of Connecticut formation fee: Filing fee at business.ct.gov
- October 2026 confirmation of Processing and expedite, official source at business.ct.gov
- Connecticut Registered Agent.co, pricing page, accessed November 13, 2026
- Mainstay Filing, Connecticut service page, accessed November 13, 2026
- CT Registered Agent.org, pricing page, accessed November 13, 2026