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Founder Primer

LLC paperwork, boiled down for founders.

Primer 2 · Connecticut

Connecticut Registered Agent Primer (2026): 6 Moves and the 3 Best Agents

Best picks for appointing a registered agent in Connecticut in 2026, in order: Mainstay Filing ($149 a year), CT Registered Agent.org ($99 a year) and Connecticut Registered Agent.co ($99 a year). Learn the rule, the eligibility test, the address test and the filing in 6 moves.
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The requirement
Yes
Per cga.ct.gov, as of October 2026
Service prices
$99 to $149 a year
As listed
Annual report
$80 a year
Per business.ct.gov, as of October 2026
Moves in this primer
6
First to last

Primer goals

  • What the law says
  • Eligibility and the address test
  • How to name or change the agent
  • Our agent picks

The Connecticut shortlist

Cost over three years first, then to-dos cleared, renewal, Connecticut fit and readable pricing (scoring page).

Our pick $149 yearly, then $149

1. Mainstay Filing: best for companies in more than one state

First place goes to Mainstay Filing because $149 a year for an agent that goes wherever the company goes next.

CT Registered Agent.org is $150 cheaper over three years; this one still places higher because it does more of the work.

Inside the price
  • A registered office in Connecticut
  • Served papers scanned free, the same business day
  • Three government letters a year scanned at no charge
  • Also serves nonprofits, corporations, LPs and LLPs
In its favor
  • Covers all fifty states
  • $149 yearly, no increase
Against it
  • $50 a year over CT Registered Agent.org
  • Agent-only plan, so no report filing
Visit Mainstay Filing Partner link. We may earn money if you buy.
Connecticut focus $99 yearly, then $99

2. CT Registered Agent.org: best for founders on a budget

Second place is CT Registered Agent.org, because an in-state street address for the registered office, $99 a year.

Inside the price
  • A Connecticut street address
  • Online copies of served documents
In its favor
  • $99; renews at $99
  • Yearly price below the national pick
Against it
  • Connecticut only; other states need their own agent
  • Annual report is outside the price
Visit CT Registered Agent.org Partner link. We may earn money if you buy.
Connecticut focus $99 yearly, then $99

3. Connecticut Registered Agent.co: best for another Connecticut option

Third place is Connecticut Registered Agent.co, because an in-state street address for the registered office, $99 a year.

Its prices match CT Registered Agent.org's, so either one works.

Inside the price
  • A Connecticut street address
  • Online copies of served documents
In its favor
  • $99; renews at $99
  • Yearly price below the national pick
Against it
  • Connecticut only; other states need their own agent
  • Annual report is outside the price
Visit Connecticut Registered Agent.co Partner link. We may earn money if you buy.

All prices in one table

# Service Annual price Renewal price Three-year total
1 Mainstay Filing $149 $149/yr $447 Visit Mainstay Filing Partner link. We may earn money if you buy.
2 CT Registered Agent.org $99 $99/yr $297 Visit CT Registered Agent.org Partner link. We may earn money if you buy.
3 Connecticut Registered Agent.co $99 $99/yr $297 Visit Connecticut Registered Agent.co Partner link. We may earn money if you buy.

Company prices as listed on November 13, 2026. The state bills the same whichever agent you name.

The Connecticut agent, in order

  1. Move 1

    What Connecticut wants from an agent

    Every LLC must name a registered agent with an in-state street address.

    Where this comes from: Per cga.ct.gov, as of October 2026

  2. Move 2

    Who counts as an agent

    A Connecticut resident, or a business entity formed in Connecticut or registered there. The agent signs to accept the appointment. The rule is in Conn. Gen. Stat. § 34-243n.

  3. Move 3

    The address test

    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.

    With a service, the public record shows its address, not yours.

  4. Move 4

    Decide who takes the role

    Qualifying owners can name themselves. The recommended agents cost $99 to $149 annually.

  5. Move 5

    Name the agent in the filing

    You name the agent in your filing with the Connecticut Secretary of State; any change is a separate filing at the same office.

    Where this comes from: Per business.ct.gov, as of October 2026

  6. Move 6

    Recheck every year

    Your agent's details are confirmed annually on the annual report, which costs $80, due on or before March 31.

    Where this comes from: Per business.ct.gov, as of October 2026

Connecticut agent costs

Cost item Paid to Amount
The agent Service company $99 to $149 a year
From year two Service company $99 to $149 a year
Annual report The state $80 every year

Filing plus the reports in years two and three plus any minimum tax: that is the state's three-year total. Sources are listed below.

Why this order

To-dos the price takes off you is 38% of the mark, and it is where moved ahead in Connecticut.

An agent who follows you to any state beat CT Registered Agent.org's lower price.

Connecticut questions

Is a registered agent a legal must in Connecticut?

Yes. Every LLC must name a registered agent with an in-state street address.

Can I be my own registered agent?

Often. Run the two tests in moves 2 and 3.

Can I change my registered agent later?

Change whenever you like through the Connecticut Secretary of State, as move 5 describes.

What does a registered agent cost in Connecticut?

Prices here run $99 to $149 a year.

What does the LLC pay the state each year?

$80 every year for the annual report.

Which registered agent would you choose?

Mainstay Filing, since a flat $149 a year, whatever state the LLC is in. Then CT Registered Agent.org and Connecticut Registered Agent.co.

Next primer

Sources, so you can check us

  1. For Connecticut Secretary of the State, Business Services Division the primer cites business.ct.gov, a page we went back to in August 2026.
  2. For Connecticut Secretary of the State, Business Services Division the primer cites business.ct.gov, a page we went back to in August 2026.
  3. For Connecticut yearly filing: Annual report: fee, official source the primer cites business.ct.gov, a page we went back to in October 2026.
  4. For Connecticut report due date the primer cites cga.ct.gov, a page we went back to in August 2026.
  5. For Connecticut formation fee: Filing fee, official source the primer cites business.ct.gov, a page we went back to in October 2026.
  6. For Connecticut formation fee: Filing fee, official source the primer cites business.ct.gov, a page we went back to in October 2026.
  7. Mainstay Filing Connecticut service page as of November 13, 2026
  8. CT Registered Agent.org pricing page as of November 13, 2026
  9. Connecticut Registered Agent.co pricing page as of November 13, 2026