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Formation ClassClass is in session: LLC paperwork, state by state.

Class 2 · Connecticut

Connecticut Registered Agent Class (2026): 6 Assignments and the 3 Best Agents

For getting a registered agent in Connecticut in 2026, the class favorites are CT Registered Agent.org ($99 a year), Mainstay Filing ($149 a year) and Connecticut Registered Agent.co ($99 a year), graded from first to last. 6 short assignments take you from the law to a correct agent filing.

Taught by the Formation Class faculty

Need-to-know facts

Legally requiredYescga.ct.gov (page read October 2026)
Service prices$99 to $149 a yearAs each company lists them
Annual report$80 a yearbusiness.ct.gov (page read October 2026)
Assignment count6Listed below

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 we picked

If you want someone else to file

Three-year tuition and homework done weigh the most; how we grade lists all five criteria.
Best overall

1. CT Registered Agent.org: best for one-state companies

$99 yearly, the same at renewal

CT Registered Agent.org gets first place, and the reason is that $99 a year, with scanned copies of served papers placed in an online account.

Over three years it costs less than Mainstay Filing, and three-year tuition is 30% of the grade.

Covered by the tuition

  • A Connecticut address for the registered office
  • Served papers are scanned into your account

Strengths

  • $99 each year, no increase
  • A smaller yearly bill than Mainstay Filing

Weak spots

  • A single-state service
  • No help with the annual report
Any state

2. Mainstay Filing: best for companies working in several states

$149 yearly, the same at renewal

Our second pick, Mainstay Filing: $149 a year from one provider, including for states you add later.

Three years of tuition run $150 above CT Registered Agent.org, and tuition is 30% of the grade.

Covered by the tuition

  • A Connecticut street address for the record
  • Scans of papers served on the company, free and on the same business day
  • Three government letters a year are scanned free
  • Also serves nonprofits, corporations, LPs and LLPs

Strengths

  • Price $149; renews at $149
  • The same provider anywhere

Weak spots

  • Costs $50 extra every year
  • Agent service and nothing more
In-state service

3. Connecticut Registered Agent.co: best for an in-state mailing address

$99 yearly, the same at renewal

Grade number 3 belongs to Connecticut Registered Agent.co, where $99 a year, with scanned copies of served papers placed in an online account.

On price, it is level with CT Registered Agent.org.

Covered by the tuition

  • A Connecticut address for the registered office
  • Served papers are scanned into your account

Strengths

  • A smaller yearly bill than Mainstay Filing
  • $99 each year, no increase

Weak spots

  • A single-state service
  • No help with the annual report

Grades and prices together

#ServiceAnnual priceRenewal priceThree-year total
1CT Registered Agent.org$99$99/yr$297Visit CT Registered Agent.orgPartner link. We may earn money if you buy.
2Mainstay Filing$149$149/yr$447Visit Mainstay FilingPartner link. We may earn money if you buy.
3Connecticut Registered Agent.co$99$99/yr$297Visit Connecticut Registered Agent.coPartner link. We may earn money if you buy.
Each company's posted price on November 13, 2026. Every agent leaves the state fees unchanged.

Naming a Connecticut registered agent, assignment by assignment

  1. Assignment
    1

    What Connecticut expects of an agent

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

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

  2. Assignment
    2

    See who may act

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

  3. Assignment
    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.

    Every graded service supplies the Connecticut office address.

  4. Assignment
    4

    Settle on the person or company

    If you pass the tests above, you can name yourself; hiring one of the graded agents costs $99 to $149 a year.

  5. Assignment
    5

    Record the appointment

    Your filing with the Connecticut Secretary of State is where the agent gets identified, and any change means a fresh filing at that office.

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

  6. Assignment
    6

    Keep the agent record accurate

    Notices from the state about the annual report go straight to your registered agent. You pay $80 every year, with the due date given as on or before March 31.

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

Connecticut agent costs

AssignmentPaid toSum
A professional agentYour service$99 to $149 a year
Agent renewalYour service$99 to $149 a year
Annual reportPaid to the state$80 every year
Filing fee plus two later reports plus any minimum tax makes the state's three-year total. The pages listed below show where each figure came from.

The reasoning behind the grades

pulled ahead of on tuition across three years, which counts for 30%.

Three years with CT Registered Agent.org add up to $297, which is $150 under Mainstay Filing.

Short answers

Will Connecticut insist that an LLC keep 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 you pass the eligibility and address tests in assignments 2 and 3.

Can I change my registered agent later?

Yes. A switch takes a change filing at the Connecticut Secretary of State (assignment 5).

What does a registered agent cost in Connecticut?

$99 to $149 a year across the graded agents.

What does the LLC pay the state each year?

Yearly it is the annual report at $80.

Which registered agent would you choose?

The grade order is CT Registered Agent.org, Mainstay Filing and Connecticut Registered Agent.co, and CT Registered Agent.org is first since a one-state plan costing $99 a year and renewing at $99.

Next class

Textbook pages and extra reading

  1. The Connecticut Secretary of the State, Business Services Division lesson rests on business.ct.gov, read again in August 2026; check our work against it.
  2. The Connecticut Secretary of the State, Business Services Division lesson rests on business.ct.gov, read again in August 2026; check our work against it.
  3. The Connecticut yearly filing: Annual report: fee, official source lesson rests on business.ct.gov, read again in October 2026; check our work against it.
  4. The Connecticut report due date lesson rests on cga.ct.gov, read again in August 2026; check our work against it.
  5. The Connecticut formation fee: Filing fee, official source lesson rests on business.ct.gov, read again in October 2026; check our work against it.
  6. The Connecticut formation fee: Filing fee, official source lesson rests on business.ct.gov, read again in October 2026; check our work against it.
  7. Pulled November 13, 2026: pricing page from CT Registered Agent.org
  8. Pulled November 13, 2026: Connecticut service page from Mainstay Filing
  9. Pulled November 13, 2026: pricing page from Connecticut Registered Agent.co