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Biz Formation Academy

A plain textbook on LLC paperwork, one state per chapter.

Chapter 2 · Connecticut

Connecticut Registered Agent Chapter (2026): 6 Sections and the 3 Best Agents

For appointing a registered agent in Connecticut in 2026, this chapter recommends Mainstay Filing ($149 a year), Connecticut Registered Agent.co ($99 a year) and CT Registered Agent.org ($99 a year), ranked from first to last. The reader finishes 6 short sections knowing how Connecticut wants a registered agent appointed.
Written by the Biz Formation Academy editorial board

Chapter summary

Legal requirement Yes Reference: cga.ct.gov, consulted October 2026
Agent price range $99 to $149 a year Posted rates
Annual report $80 a year Reference: business.ct.gov, consulted October 2026
Sections in this chapter 6 Each one explained

Chapter objectives

  • What the law provides
  • Eligibility and the address test
  • How to name or replace the agent
  • The agents chosen

Recommended reading for Connecticut

Cost over three years comes first, then paperwork completed, second-year price, Connecticut fit and price clarity (grading page).

1. Mainstay Filing: best for LLCs that may expand to other states

Best overall
$149 per year (renewal $149)

This chapter recommends Mainstay Filing above the others, because $149 yearly is the agent price in all fifty states.

Connecticut Registered Agent.co costs $150 less over three years; this service still ranks higher because it does more of the work.

Price covers

  • An office address inside the state
  • Any papers served on the company get scanned for you at no cost
  • Three government mailings a year are scanned at no cost to you
  • Also serves nonprofits, corporations, LPs and LLPs

Advantages

  • A flat $149 annually
  • Available in all fifty states

Limitations

  • $50 more annually than the local choice
  • An agent-only plan with no report filing
Visit Mainstay Filing Partner link. We may earn money if you buy.

2. Connecticut Registered Agent.co: best for owners watching costs

Focused on Connecticut
$99 per year (renewal $99)

Entry number 2 is Connecticut Registered Agent.co, where a plan for one state: $99 a year, renewing at $99.

Price covers

  • An office address within the state
  • Online copies of legal papers

Advantages

  • A smaller yearly bill than Mainstay Filing
  • $99 a year, unchanged at renewal

Limitations

  • Connecticut only, so each additional state means one more agent
  • The owner completes the annual report
Visit Connecticut Registered Agent.co Partner link. We may earn money if you buy.

3. CT Registered Agent.org: best for another local choice

Focused on Connecticut
$99 per year (renewal $99)

Entry number 3 is CT Registered Agent.org, where a plan for one state: $99 a year, renewing at $99.

On price, it matches Connecticut Registered Agent.co.

Price covers

  • An office address within the state
  • Online copies of legal papers

Advantages

  • $99 a year, unchanged at renewal
  • A smaller yearly bill than Mainstay Filing

Limitations

  • Connecticut only, so each additional state means one more agent
  • The owner completes the annual report
Visit CT Registered Agent.org Partner link. We may earn money if you buy.

The Connecticut rankings compared

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

Prices come from each company's own site, consulted November 13, 2026. No agent changes the state fees.

The sections

  1. Section 1

    What Connecticut requires of an agent

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

    Reference: Reference: cga.ct.gov, consulted October 2026

  2. Section 2

    Who may take the role

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

  3. Section 3

    Meet the address requirement

    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.

    A hired service lists its own Connecticut street address in place of yours.

  4. Section 4

    Serve as your own agent or hire one

    A qualified owner can be the agent. Those who prefer not to can pay $99 to $149 a year to a recommended agent.

  5. Section 5

    Record the agent with the state

    A new LLC names its agent on the Certificate of Organization, delivered to the Connecticut Secretary of State. Replacing the agent later requires an amendment filed with the same office.

    Reference: Reference: business.ct.gov, consulted October 2026

  6. Section 6

    Watch for changes

    Annually the annual report confirms the agent's details for $80, by on or before March 31.

    Reference: Reference: business.ct.gov, consulted October 2026

The price list

PurposePayeeSum
Hiring an agent The service company$99 to $149 a year
Renewing the agent The service company$99 to $149 a year
Annual report State agency$80 every year

Rows for the state rely on Connecticut's published fee schedules (listed in the bibliography below), and each service row uses that company's own price. For three years the state row adds the filing, the report in year two, the report in year three and any minimum tax.

How the Connecticut recommendations were ranked

Chapters the price completes accounts for 30% of the ranking, and led on it in Connecticut.

One agent for every state beat the single-state plan.

Common questions

Does Connecticut require an LLC to have a registered agent?

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

Can I be my own registered agent?

Yes, if the eligibility and address tests in sections 2 and 3 are met.

Can I change my registered agent later?

Change it whenever needed through the Connecticut Secretary of State, as section 5 describes.

What does a registered agent cost in Connecticut?

This chapter's agents bill $99 to $149 each year.

What does the LLC pay the state each year?

Owners submit the annual report and pay $80 every year.

Which registered agent would you choose?

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

More chapters

Bibliography and primary texts

  1. Primary text behind Connecticut Secretary of the State, Business Services Division: business.ct.gov, accessed August 2026.
  2. Primary text behind Connecticut Secretary of the State, Business Services Division: business.ct.gov, accessed August 2026.
  3. Primary text behind Connecticut yearly filing: Annual report: fee, official source: business.ct.gov, accessed October 2026.
  4. Primary text behind Connecticut report due date: cga.ct.gov, accessed August 2026.
  5. Primary text behind Connecticut formation fee: Filing fee, official source: business.ct.gov, accessed October 2026.
  6. Primary text behind Connecticut formation fee: Filing fee, official source: business.ct.gov, accessed October 2026.
  7. Prices quoted from the Connecticut service page at Mainstay Filing on November 13, 2026
  8. Prices quoted from the pricing page at Connecticut Registered Agent.co on November 13, 2026
  9. Prices quoted from the pricing page at CT Registered Agent.org on November 13, 2026