The simple route · Connecticut

3 Best Registered Agents in Connecticut (2026): Where to Start

Our 2026 recommendation for registered agents in Connecticut, in order, is Mainstay Filing ($149 a year), CT Registered Agent.org ($99 a year) and Connecticut Registered Agent.co ($99 a year). First year: $99 to $149. Three years: $297 to $447.

Written by the Simple Filing Guide editorial team Checked and updated November 13, 2026

Quick guide

Required by the state?: Required
Title in the statute: Registered agent
Typical service price: $99 to $149 on a yearly basis
Our shortlist: Mainstay Filing, CT Registered Agent.org then Connecticut Registered Agent.co

Connecticut picks, best first

The order follows our five checks: three-year cost first, then what the price covers.

#1 Recommended first

1. Mainstay Filing: best for owners who plan to grow

$149 a year, then $149 at renewal

Rank Mainstay Filing first, as it charges $149 a year in this state, and the price is the same in every other state.

Compare the price before you commit: CT Registered Agent.org is $150 lower over three years, but it works in Connecticut only.

Checklist: what is included

An address of record in the state
Free scans of three government mailings per year
Covers more than LLCs: corporations, LPs, LLPs and nonprofits

What works

$149 each year with no increase
Usable wherever the LLC registers

Gaps

Costs $50 more per year than CT Registered Agent.org
Report filing requires the formation package

See Mainstay Filing's plans Partner link. We may earn money if you buy.

#2 One-state pick

2. CT Registered Agent.org: best for tight budgets

$99 a year, then $99 at renewal

CT Registered Agent.org is second, because its service costs $99 annually and puts a street address on file.

Checklist: what is included

A physical in-state address
Legal mail scanned for you

What works

Beats Mainstay Filing on yearly cost
Price fixed at $99 yearly

Gaps

Single-state coverage
Not included: the annual report

See CT Registered Agent.org's plans Partner link. We may earn money if you buy.

#3 One-state pick

3. Connecticut Registered Agent.co: best for a second in-state option

$99 a year, then $99 at renewal

Connecticut Registered Agent.co is third, because its service costs $99 annually and puts a street address on file.

Its prices match CT Registered Agent.org exactly, so compare service before you choose.

Checklist: what is included

A physical in-state address
Legal mail scanned for you

What works

Price fixed at $99 yearly
Beats Mainstay Filing on yearly cost

Gaps

Single-state coverage
Not included: the annual report

See Connecticut Registered Agent.co's plans Partner link. We may earn money if you buy.

The table

#	Provider	Year-one cost	Yearly after	Total for 3 years	Included
1	Mainstay Filing	$149	$149/yr	$447	an address of record in the state; free scans of three government mailings per year; Covers more than LLCs: corporations, LPs, LLPs and nonprofits	See Mainstay Filing's plans Partner link. We may earn money if you buy.
2	CT Registered Agent.org	$99	$99/yr	$297	A physical in-state address; legal mail scanned for you	See CT Registered Agent.org's plans Partner link. We may earn money if you buy.
3	Connecticut Registered Agent.co	$99	$99/yr	$297	A physical in-state address; legal mail scanned for you	See Connecticut Registered Agent.co's plans Partner link. We may earn money if you buy.

Prices as of November 13, 2026; the state's own fees are listed in the checklist below.

Questions to settle

Is naming a registered agent a legal duty?

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

Legal basis: Conn. Gen. Stat. § 34-243n. verify at cga.ct.gov, as of October 2026

Who qualifies as an agent?

A Connecticut resident, or a business entity formed in Connecticut or registered there. The agent signs to accept the appointment.

When you fit the rule, you can fill the role for free.

How much per year for an agent?

The recommended services charge $99 to $149 annually; three years cost $297 to $447.

Choosing a different agent leaves every state fee unchanged.

What does the agent handle day to day?

The agent signs for legal documents addressed to the LLC in Connecticut.

If papers arrive and no one accepts them, a case can move ahead without the LLC. Learn more: service of process

Which yearly state charges apply?

Expect the annual report to come back every year, at $80 each time. In the state's words it is due on or before March 31, so mark the date.

verify at business.ct.gov, as of October 2026

What put the first pick on top?

Mainstay Filing wins on filing jobs included, a 27% check.

Start with total for three years, then filing jobs included, then three smaller checks.

Coverage tipped the scale: fifty states against one.

Our method in full

Connecticut checklist, with sources

Requirement	What to know	Verify
Formation fee	$120	verify at business.ct.gov, as of October 2026
Registered agent	Required	verify at cga.ct.gov, as of October 2026
Annual report	$80 every year	verify at business.ct.gov, as of October 2026
What the state collects in three years	$280	Our sum of the rows above

Add the filing fee, the reports for years two and three and any minimum tax to reproduce the last row. Costs with no set amount, such as a newspaper notice, are left out.

Also asked

Can I act as my own agent?

Yes, if you meet the state rules on who can serve and on the address, both shown above.

Which addresses does the state accept?

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.

How do the three-year costs compare?

Totals to compare: Mainstay Filing at $447, CT Registered Agent.org at $297, Connecticut Registered Agent.co at $297

What are the numbers based on?

Official Connecticut documents supply the state fees, and the companies' own pricing pages supply the service fees. Both carry dates on this page.

Does the state require a service?

Nothing requires a service. Consider it a paid convenience.

Who ranks first in Connecticut?

Mainstay Filing, because the price does not change by state: $149 a year, $149 at renewal. Then CT Registered Agent.org and Connecticut Registered Agent.co.

Verify these facts

business.ct.gov (Connecticut Secretary of the State), verified August 2026
business.ct.gov (Connecticut Secretary of the State), verified August 2026
business.ct.gov (Connecticut yearly filing: Annual report), verified October 2026
cga.ct.gov (Connecticut report due date), verified August 2026
business.ct.gov (Connecticut formation fee: Filing fee), verified October 2026
business.ct.gov (Connecticut formation fee: Filing fee), verified October 2026
Prices read November 13, 2026 from the Mainstay Filing Connecticut service page
Prices read November 13, 2026 from the CT Registered Agent.org pricing page
Prices read November 13, 2026 from the Connecticut Registered Agent.co pricing page