Place1
Best hereConnecticut Registered Agent.co
1. Connecticut Registered Agent.co: best for a low flat yearly price
$99 per year, renews at $99
Our mark9.5out of 10
Connecticut Registered Agent.co earns first place with a $99 yearly plan built for Connecticut companies, renewing at $99.
Its plan gives you an in-state street address for the registered office, and legal documents served on the company are scanned and sent to you online.
Its edge over Mainstay Filing is cost, which carries the most weight in our scoring.
What you get
- In-state street address for the registered office
- Legal documents served on the company scanned and sent to you online
Why pick it
- Lowest annual price on this list
- $99 yearly, same to renew
- Also forms LLCs, with the first agent year included
Less good
- Filing the annual report is not in the price
- Focused on Connecticut; other states need their own agent
Place2
Fifty-state coverageMainstay Filing
2. Mainstay Filing: best for companies that may expand
$149 per year, renews at $149
Our mark9.3out of 10
In second place, Mainstay Filing: $149 a year for an agent that can follow the company into any state at the same price.
The $199 formation package includes the agent and files the annual report as well.
Connecticut Registered Agent.co undercuts it by $150 over three years, and cost is our heaviest criterion.
What you get
- A physical in-state address on the public record
- Service of process scanned the same business day, no fee
- First three government mailings a year scanned free
- Compliance reminders
Why pick it
- Works for LLCs, corporations, LPs, LLPs and nonprofits
- $149/yr, renews at $149
- Service of process scanned the same business day, no fee
- First three government mailings a year scanned free
Less good
- Agent alone costs $50 a year more than Connecticut Registered Agent.co
- Report filing needs the formation package
Place3
Connecticut specialistCT Registered Agent.org
3. CT Registered Agent.org: best for a local Connecticut agent
$99 per year, renews at $99
Our mark9.0out of 10
Third: CT Registered Agent.org, for a $99 yearly plan built for Connecticut companies, renewing at $99.
Its plan gives you an in-state street address for the registered office, and legal documents served on the company are scanned and sent to you online.
Connecticut Registered Agent.co and CT Registered Agent.org publish the same prices and the same plan features, so the gap between them is small and either is a sound choice.
What you get
- In-state street address for the registered office
- Legal documents served on the company scanned and sent to you online
Why pick it
- $99 yearly, same to renew
- Also forms LLCs, with the first agent year included
- Lowest annual price on this list
Less good
- Filing the annual report is not in the price
- Focused on Connecticut; other states need their own agent
The 3 picks side by side
| Rank | Service | Our score | Annual price | Renewal price | Best for | Link |
|---|
| 1 | Connecticut Registered Agent.co | 9.5 | $99 | $99/yr | Lowest yearly price on this list | Visit Connecticut Registered Agent.coPartner link. We may earn money if you buy. |
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| 2 | Mainstay Filing | 9.3 | $149 | $149/yr | Agent plus fifty-state coverage | Visit Mainstay FilingPartner link. We may earn money if you buy. |
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| 3 | CT Registered Agent.org | 9.0 | $99 | $99/yr | Lowest yearly price on this list | Visit CT Registered Agent.orgPartner link. We may earn money if you buy. |
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The Founders Review sets these scores itself from the five criteria on our method page; they are not user ratings.
2026 prices: year one, renewal and three-year total cost
| Service | Year one | Year two | Year three | Three-year total | Same price at renewal |
|---|
| Connecticut Registered Agent.co | $99 | $99 | $99 | $297 | Yes |
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| Mainstay Filing | $149 | $149 | $149 | $447 | Yes |
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| CT Registered Agent.org | $99 | $99 | $99 | $297 | Yes |
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Prices from each company's own pricing pages, read November 12, 2026. State fees are identical across these agents.
Why Connecticut Registered Agent.co is first
What split first and second in Connecticut: three-year cost, weighted at 30% in our method.
Three-year cost: $297 with Connecticut Registered Agent.co, saving $150 against Mainstay Filing. A Connecticut-only company gains little from coverage elsewhere, so cost won.
Read the full criteria on our How we rank page.
Connecticut registered agent requirements (official, Connecticut Secretary of State)
Every LLC must name a registered agent with an in-state street address. The address has to be a Connecticut street address that is not a P.O. box, plus a Connecticut mailing address, which can be a P.O. box. The statute is Conn. Gen. Stat. § 34-243n.
Annual report: what it costs
Connecticut LLCs file the annual report every year, due on or before March 31, and the state fee is $80. Your registered agent is the address where the state's notices land.
Common Connecticut questions
Does a Connecticut LLC need a registered agent?
Yes. Every LLC must name a registered agent with an in-state street address.
How much does a registered agent cost in Connecticut?
Expect $99 to $149 a year; renewal prices match the first year.
Can I be my own registered agent?
Only if you meet the state's rule. A Connecticut resident, or a business entity formed in Connecticut or registered there. The agent signs to accept the appointment.
When is the Connecticut annual report due?
It is due on or before March 31 and the state fee is $80.
Which registered agents do you rank here?
Connecticut Registered Agent.co ($99 a year), Mainstay Filing ($149 a year) and CT Registered Agent.org ($99 a year), in that order on this page.
Which Connecticut registered agent is the best value?
Connecticut Registered Agent.co ranks first on our method: an in-state agent for $99 a year that scans served papers to you online.
Sources we used
- Connecticut Secretary of the State, Business Services Division, confirmed August 2026: business.ct.gov/business-services/file-annual-report
- Connecticut Secretary of the State, Business Services Division, confirmed August 2026: business.ct.gov/knowledge-base/articles/annual-report/file-an-annual-r
- Connecticut yearly filing: Annual report: fee, official source, confirmed October 2026: business.ct.gov/knowledge-base/articles/domestic-annual-report-forms-a
- Connecticut report due date, confirmed August 2026: www.cga.ct.gov/current/pub/chap_613a.htm
- Connecticut formation fee: Filing fee, official source, confirmed October 2026: business.ct.gov/knowledge-base/articles/domestic-limited-liability-com
- Connecticut formation fee: Filing fee, official source, confirmed October 2026: business.ct.gov/-/media/businessonestop/fee-schedule-revised-712020.pd
- Connecticut Registered Agent.co, pricing and service pages (read November 12, 2026)
- Mainstay Filing, Connecticut service page (read November 12, 2026)
- CT Registered Agent.org, pricing and service pages (read November 12, 2026)