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LLC 101 Guide

Unit 2 · Connecticut

The Connecticut Registered Agent Unit (2026): 6 Tasks and the 3 Best Agents

For naming a registered agent in Connecticut in 2026, this unit puts Mainstay Filing ($149 a year), Connecticut Registered Agent.co ($99 a year) and CT Registered Agent.org ($99 a year) at the top of the class, in that order. Over 6 tasks you learn the legal rule, who is eligible, the address test and the way an agent gets named.

Prepared by the LLC 101 Guide instructors

Key facts for this unit

Needed by law?
Yes
cga.ct.gov (page read October 2026)
What recommended services charge
$99 to $149 a year
From company pricing pages
Annual report
$80 a year
business.ct.gov (page read October 2026)
Task count
6
In order

By the end you will know

  • Why Connecticut wants an agent on file
  • Who is eligible and the address test
  • How an agent gets on record
  • The agents at the top of the class

Connecticut: our recommended services

What counts most: three-year cost and how many assignments the price finishes. How we grade lists all five criteria.

Top of the class

1. Mainstay Filing: best for owners planning to expand

Top of the class$149 yearly, $149 at renewal

Start the list with Mainstay Filing, because $149 a year, $149 at renewal, and the same plan works in every other state.

Three years run $150 higher than with Connecticut Registered Agent.co, but it completes more of the assignments, and the grade pays for that.

What the price covers

  • An office address inside the state
  • Free scans of legal papers served on the company, sent the business day they arrive
  • Up to three government letters a year are scanned free
  • Also works for nonprofits, corporations, LPs and LLPs

What works

  • The same provider anywhere
  • A flat $149 yearly

What to weigh

  • Higher by $50 a year
  • Agent service and nothing more
Visit Mainstay FilingPartner link. We may earn money if you buy.

Top of the class

2. Connecticut Registered Agent.co: best for one-state companies

In-state service$99 yearly, $99 at renewal

Second goes to Connecticut Registered Agent.co, since $99 a year with no bump at renewal, a good match for an LLC that stays in one state.

What the price covers

  • An in-state office address
  • Served papers are scanned into your account

What works

  • Yearly price below the national pick
  • $99 a year, same at renewal

What to weigh

  • A single-state service
  • You finish the annual report on your own
Visit Connecticut Registered Agent.coPartner link. We may earn money if you buy.

Top of the class

3. CT Registered Agent.org: best for a second local choice

In-state service$99 yearly, $99 at renewal

Third goes to CT Registered Agent.org, since $99 a year with no bump at renewal, a good match for an LLC that stays in one state.

Its prices are the same as Connecticut Registered Agent.co's, so either works.

What the price covers

  • An in-state office address
  • Served papers are scanned into your account

What works

  • Yearly price below the national pick
  • $99 a year, same at renewal

What to weigh

  • A single-state service
  • You finish the annual report on your own
Visit CT Registered Agent.orgPartner link. We may earn money if you buy.

3 services, side by side

#ServiceAnnual priceRenewal priceThree-year total
1Mainstay Filing$149$149/yr$447Visit Mainstay FilingPartner link. We may earn money if you buy.
2Connecticut Registered Agent.co$99$99/yr$297Visit Connecticut Registered Agent.coPartner link. We may earn money if you buy.
3CT Registered Agent.org$99$99/yr$297Visit CT Registered Agent.orgPartner link. We may earn money if you buy.
Prices come from each company's own site, opened November 13, 2026. The state bills the same whichever agent you name.

The unit, task by task

  1. Task 1

    What Connecticut expects of an agent

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

    Source: cga.ct.gov (page read October 2026)

  2. Task 2

    Find out who is allowed to serve

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

  3. Task 3

    Pick an address that complies

    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.

    Each service we recommend supplies the in-state address.

  4. Task 4

    Serve yourself or use a professional

    Hiring from the recommended agents costs $99 to $149 a year; serving yourself is the option for those who qualify.

  5. Task 5

    Report the agent's details

    On a new Connecticut LLC, the agent goes on the Certificate of Organization. A later switch is a separate filing with the Connecticut Secretary of State.

    Source: business.ct.gov (page read October 2026)

  6. Task 6

    Watch the details

    Mail from the state about the annual report reaches your registered agent. The filing is $80 every year, due on or before March 31.

    Source: business.ct.gov (page read October 2026)

Agent and state costs

What forPaid toAmount
Hiring an agentYour service$99 to $149 a year
Renewing the agentYour service$99 to $149 a year
Annual reportPaid to the state$80 every year
State fees were read from the official pages named in the sources. Three years means the filing, two years of reports and the minimum tax where there is one.

How we ordered the Connecticut picks

pulled ahead of on assignments the price completes, a criterion worth 31%.

Reach put it ahead of Connecticut Registered Agent.co.

Check your Connecticut answers

Can a Connecticut LLC go without a registered agent?

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

Can I be my own registered agent?

Often. Test yourself against the two rules in tasks 2 and 3.

Can I change my registered agent later?

Yes. Switching takes a change filing at the Connecticut Secretary of State (task 5).

What does a registered agent cost in Connecticut?

$99 to $149 a year across our picks.

What does the LLC pay the state each year?

The LLC sends in the annual report for $80 every year.

Which registered agent would you choose?

Mainstay Filing, Connecticut Registered Agent.co and CT Registered Agent.org, from highest grade to lowest.

Reading list and sources

  1. Hand-in notes for Connecticut Secretary of the State, Business Services Division. Each statement rests on business.ct.gov, last opened August 2026.
  2. Hand-in notes for Connecticut Secretary of the State, Business Services Division. Each statement rests on business.ct.gov, last opened August 2026.
  3. Hand-in notes for Connecticut yearly filing: Annual report: fee, official source. Each statement rests on business.ct.gov, last opened October 2026.
  4. Hand-in notes for Connecticut report due date. Each statement rests on cga.ct.gov, last opened August 2026.
  5. Hand-in notes for Connecticut formation fee: Filing fee, official source. Each statement rests on business.ct.gov, last opened October 2026.
  6. Hand-in notes for Connecticut formation fee: Filing fee, official source. Each statement rests on business.ct.gov, last opened October 2026.
  7. We opened the Connecticut service page at Mainstay Filing on November 13, 2026
  8. We opened the pricing page at Connecticut Registered Agent.co on November 13, 2026
  9. We opened the pricing page at CT Registered Agent.org on November 13, 2026