Registered agent required
Yes
From cga.ct.gov, October 2026
Registered agent guide · Connecticut
Connecticut Registered Agent Rules and Fees (2026): the Official Numbers and the 3 Best Agents
Mainstay Filing ($149 a year), CT Registered Agent.org ($99 a year) and Connecticut Registered Agent.co ($99 a year) come first, second and third for hiring a registered agent in Connecticut in 2026. A registered agent is mandatory for Connecticut LLCs. Each year the state collects $80, number 36th of 50.
Facts for Connecticut
Annual report
$80 / yr
Due date, in the state's own words: on or before March 31. From business.ct.gov, October 2026
State charges over 1 year
$80
A typical year of state charges
Ranked services for Connecticut
Five weighted criteria set the order (method): provider fees over three years 34%, filings covered 28%, then renewal terms, fit with Connecticut rules and a clear state fee.
1. Mainstay Filing: best for an agent that follows you across states
$149 the first year, the same after that
First place goes to Mainstay Filing: a $149 agent fee that applies in all fifty states, so a growing company can stay with one provider.
Over three years the provider fees are $150 above CT Registered Agent.org's, and in exchange the state paperwork it handles is wider.
What the price takes in
- A street address for the registered office
- Scans papers served on the company the same business day, at no charge
- Scans the first three government letters each year, no charge
- Serves nonprofits, corporations, LPs and LLPs as well
In its favor
- The same price in all fifty states
- $149 per year with no step up
Against it
- CT Registered Agent.org charges $50 less every year
- It covers the agent role only, and reports are yours to send in
2. CT Registered Agent.org: best for people who reside in Connecticut
$99 the first year, the same after that
CT Registered Agent.org comes second because $99 per year for an agent with an office address in the state.
What the price takes in
- A registered office address inside the state
- Papers served on the company are scanned to your login
In its favor
- Price $99, renewal $99
- A yearly price below Mainstay Filing
Against it
- One state only
- Nothing is done about the annual report on your behalf
3. Connecticut Registered Agent.co: best for Connecticut specialists
$99 the first year, the same after that
Connecticut Registered Agent.co comes third because $99 per year for an agent with an office address in the state.
CT Registered Agent.org and this provider post the same prices.
What the price takes in
- A registered office address inside the state
- Papers served on the company are scanned to your login
In its favor
- Price $99, renewal $99
- A yearly price below Mainstay Filing
Against it
- One state only
- Nothing is done about the annual report on your behalf
The ranking in numbers
| No. | Provider | Price per year | Renewal price | Provider fees over 3 years | |
|---|---|---|---|---|---|
| 1 | Mainstay Filing | $149 | $149/yr | $447 | Visit Mainstay FilingPartner link. We may earn money if you buy. |
| 2 | CT Registered Agent.org | $99 | $99/yr | $297 | Visit CT Registered Agent.orgPartner link. We may earn money if you buy. |
| 3 | Connecticut Registered Agent.co | $99 | $99/yr | $297 | Visit Connecticut Registered Agent.coPartner link. We may earn money if you buy. |
Posted prices as of November 13, 2026. The state charges the same no matter who is your agent.
Registered agent calculator
Agent prices plus the state's recurring charges (the annual report from year 2). Formation fees are not counted.
Connecticut and the states around it in the ranking
| Place | State | Yearly state fees |
|---|---|---|
| 34th | Illinois | $75 |
| 34th | New Jersey | $75 |
| 36th | Connecticut | $80 |
| 37th | Maine | $85 |
| 38th | New Hampshire | $100 |
All fifty rows are in Registered agent rules by state.
The registered agent requirement in Connecticut
Every LLC must name a registered agent with an in-state street address. 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.
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 authority is Conn. Gen. Stat. § 34-243n.
Connecticut's recurring charges
Letters about the annual report go to the address of your registered agent. The cost is $80 every year, and the date is on or before March 31.
Why the first pick is first
Paperwork inside the price decided first place in Connecticut. It is worth 28% of the score, and the other criteria are service bill, years one to three, second-year price, match to the state, state fee shown apart.
CT Registered Agent.org costs less, and reach across states earned the higher score.
Questions about Connecticut
Are Connecticut LLCs obliged to keep a registered agent on file?
Yes. Every LLC must name a registered agent with an in-state street address.
Who can serve as the registered agent for Connecticut LLCs?
A Connecticut resident, or a business entity formed in Connecticut or registered there. The agent signs to accept the appointment.
What does registered agent service cost in Connecticut each year?
The agents on this page charge $99 to $149 per year.
What state fees does an LLC pay every year?
The state collects $80 per year on our yearly measure, which is the annual report at $80 every year.
Which registered agents does this page rank?
Mainstay Filing ($149 a year), CT Registered Agent.org ($99 a year) and Connecticut Registered Agent.co ($99 a year), arranged by our ranking, best first.
Which registered agent would you choose?
Mainstay Filing, because a flat $149 yearly price from a provider that serves the whole country. After it come CT Registered Agent.org and Connecticut Registered Agent.co.
Where these facts come from
- Each figure under Connecticut Secretary of the State, Business Services Division follows what business.ct.gov states, as that page read when we opened it in August 2026.
- Each figure under Connecticut Secretary of the State, Business Services Division follows what business.ct.gov states, as that page read when we opened it in August 2026.
- Each figure under Connecticut yearly filing: Annual report: fee, official source follows what business.ct.gov states, as that page read when we opened it in October 2026.
- Each figure under Connecticut report due date follows what cga.ct.gov states, as that page read when we opened it in August 2026.
- Each figure under Connecticut formation fee: Filing fee, official source follows what business.ct.gov states, as that page read when we opened it in October 2026.
- Each figure under Connecticut formation fee: Filing fee, official source follows what business.ct.gov states, as that page read when we opened it in October 2026.
- Each figure under Illinois Secretary of State, Department of Business Services follows what ilsos.gov states, as that page read when we opened it in August 2026.
- Each figure under Illinois Secretary of State, Department of Business Services follows what ilsos.gov states, as that page read when we opened it in August 2026.
- Each figure under New Jersey Division of Revenue and Enterprise Services follows what njportal.com states, as that page read when we opened it in August 2026.
- Each figure under New Jersey Division of Revenue and Enterprise Services follows what njportal.com states, as that page read when we opened it in August 2026.
- Each figure under Maine Secretary of State follows what maine.gov states, as that page read when we opened it in August 2026.
- Each figure under Maine Secretary of State follows what maine.gov states, as that page read when we opened it in August 2026.
- Each figure under New Hampshire Secretary of State, Corporations Division follows what sos.nh.gov states, as that page read when we opened it in August 2026.
- Each figure under New Hampshire Secretary of State, Corporations Division follows what sos.nh.gov states, as that page read when we opened it in August 2026.
- Connecticut service page at Mainstay Filing, from the company website, read November 13, 2026
- Pricing page at CT Registered Agent.org, from the company website, read November 13, 2026
- Pricing page at Connecticut Registered Agent.co, from the company website, read November 13, 2026