To change the registered agent of a Connecticut LLC or corporation, you file a Change of Agent with the Secretary of the State, and the state fee is $50 as of October 2026. The agent itself can be a Connecticut resident (including an owner of the business) or a business entity with a Connecticut business address, and every new agent has to sign an acceptance of appointment.
That $50 fee, plus a $50 charge when an agent resigns, makes it worth choosing carefully the first time. Our recommendation for most Connecticut companies is Mainstay Filing at $149 per year; the rules and the filing steps are below.
Updated October 2026.
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Best Registered Agents in Connecticut (2026)
Here are our top picks for registered agent service in Connecticut, ranked. Mainstay Filing comes first for its flat yearly price; the two Connecticut registered agent services below it are options if you only need an agent.
| Rank | Provider | Best for | Price | What’s included |
|---|---|---|---|---|
| 1 | Mainstay Filing | Registered agent service with a flat renewal price | $149/year (renews at $149) | Registered agent service in all 50 states; switching from another agent included (state change fee at cost) |
| 2 | CT Registered Agent.org | Connecticut registered agent service only | $99/year | $99 per year, flat; in-state street address for the registered office; legal documents served on the company are scanned and sent to the owner online |
| 3 | Connecticut Registered Agent.co | Connecticut registered agent service only | $99/year | in-state street address for the registered office; legal documents served on the company are scanned and sent to the owner online |
1. Mainstay Filing
Mainstay Filing is our top pick in Connecticut. It costs $149/year (renews at $149) and covers registered agent service in all 50 states; switching from another agent included (state change fee at cost). The price stays the same every year, with no add-on menu.
2. CT Registered Agent.org
CT Registered Agent.org is a Connecticut registered agent service at $99/year. It provides $99 per year, flat; in-state street address for the registered office; legal documents served on the company are scanned and sent to the owner online. It’s a fit if you only need a registered agent rather than full formation help.
3. Connecticut Registered Agent.co
Connecticut Registered Agent.co is a Connecticut registered agent service at $99/year. It provides in-state street address for the registered office; legal documents served on the company are scanned and sent to the owner online. It’s a fit if you only need a registered agent rather than full formation help.
Connecticut registered agent overview
| Item | Connecticut (October 2026) |
|---|---|
| Individual agents | A Connecticut resident, including a principal of the business |
| Entity agents | A Connecticut corporation, LLC, LLP or statutory trust, or a registered foreign one, with a Connecticut business address |
| Acceptance | The new agent must sign an acceptance of appointment |
| Change of Agent | $50, online or paper (Business.CT.gov fees) |
| Resignation of Agent | $50 (no standard form) |
| Certificate of Organization (LLC) | $120 |
| Annual report (LLC) | $80, filed online January 1 to March 31 each year |
| Name reservation | $60 |
| Filing portal | Business.CT.gov (Secretary of the State, Business Services Division) |
Why does a Connecticut business need a registered agent?
A registered agent accepts lawsuits, subpoenas and official notices for your company. The agent’s name and address are listed in the Secretary of the State’s records, which anyone can view through the online business search, and a process server will use that address to deliver legal papers.
Connecticut LLCs appoint their first agent in the Certificate of Organization; the state describes that filing as including the appointment of the agent. From then on, the business is responsible for keeping the agent current.
Who may serve as a registered agent in Connecticut?
The Secretary of the State’s Change of Agent form lists three kinds of eligible agent:
- Any individual who is a resident of Connecticut, including a principal of the business. An individual must give a complete business street address (or check the box if there is none) and a Connecticut residence address.
- A Connecticut business entity: a corporation, limited liability company, limited liability partnership or statutory trust formed in Connecticut.
- A foreign business entity of the same types that has registered to do business in Connecticut.
A business acting as agent must provide a Connecticut business address. For LLCs and domestic stock corporations, the form also asks for a Connecticut mailing address for the appointed agent. And in every case, the appointed agent must sign the acceptance of appointment.
The underlying statute is Conn. Gen. Stat. § 34-243n, which says the registered agent shall have a place of business in Connecticut. The street address cannot be a P.O. box, although a P.O. box can be used as the separate Connecticut mailing address. An individual agent’s residential address becomes public record, and the company cannot appoint itself as its own agent.
How much is the Connecticut Change of Agent fee?
Connecticut charges $50 to file a Change of Agent, according to the Business.CT.gov domestic LLC forms and fees page as of October 2026. The same page lists $50 for a Resignation of Agent, which is the agent’s filing when it wants to stop serving.
| Filing | Fee | Online? |
|---|---|---|
| Change of Agent | $50 | Yes |
| Resignation of Agent | $50 | No form available |
| Annual Report (domestic LLC) | $80 | Yes, January 1 to March 31 |
| Interim Notice of Change of Manager/Member | $20 | Yes |
Expedited handling is offered only for online filings, not for paper forms sent by mail, according to Business.CT.gov.
Filing a Change of Agent in Connecticut, step by step
- Look up your business in the Connecticut business search to confirm the exact name and current agent on file.
- Choose and confirm the new agent. Get the exact legal name, Connecticut business address and, for an individual, the Connecticut residence address.
- Log in to Business.CT.gov. Online filing requires a Business.CT.gov account. Paper forms are also available from the state’s paper filings page.
- Enter the new agent’s details and have the agent sign or complete the acceptance of appointment.
- Sign as an authorized person. The signer prints their name and capacity; the signature counts as a statement under penalty of false statement.
- Pay the $50 fee by card online or by check with a paper form, then save the filed copy.
When you hire a commercial agent, it usually prepares the Change of Agent for you and supplies its own acceptance.
If your current agent resigns first
Sometimes the change starts on the other side: an accountant retires, a friend moves away, or a service closes your account for non-payment. In that case the agent files a Resignation of Agent with the Secretary of the State, which carries its own $50 fee and has no standard state form. Your company should not wait for that filing to clear. Appoint a replacement with a Change of Agent so that papers served on the business always have somewhere to go.
Should you be your own Connecticut registered agent?
If you live in Connecticut, you can name yourself. The decision mostly comes down to privacy, presence and how often your address might change.
| Consider | Self as agent | Commercial agent |
|---|---|---|
| Annual cost | $0 | Typically about $100 to $150 |
| Public address | Your business and residence details on file | Agent’s business address |
| Availability | You must be reachable for service | Staffed address |
| Moving | Each change costs $50 | Address does not change when you move |
| Out-of-state owners | Not eligible | Eligible |
Because every change costs $50, owners who expect to move, sell or expand outside Connecticut often find a commercial agent cheaper over a few years than repeated filings.
What a good commercial agent should give you
- A Connecticut business address that will be accepted on the Change of Agent filing.
- A signed acceptance of appointment, prepared as part of onboarding.
- A clear way to see served documents quickly, such as scans in an online account.
- One flat yearly price with the renewal price stated up front.
Other Connecticut filings that involve your agent
Each Connecticut LLC files an $80 annual report between January 1 and March 31, per the annual report forms and fees page. Use the business search to check your next due date and confirm that the agent listed is still correct. There is no late fee, but Connecticut will not issue a Certificate of Legal Existence while a report is overdue, and a company more than one year in default can be administratively dissolved.
Starting from scratch? Read our guide to forming an LLC in Connecticut, the broader how to start a business in Connecticut guide, and our Connecticut business name search walkthrough before you reserve a name.
FAQs
How much does it cost to change a registered agent in Connecticut?
The Connecticut Secretary of the State charges $50 to file a Change of Agent, according to Business.CT.gov as of October 2026. The filing can be made online with a Business.CT.gov account or on a paper form. A separate $50 fee applies when an agent files a Resignation of Agent.
Who can be a registered agent in Connecticut?
A Connecticut resident, including a principal of the business, can serve. So can a Connecticut corporation, LLC, LLP or statutory trust, or a foreign one registered in Connecticut, as long as it provides a Connecticut business address. Every appointed agent must sign an acceptance of appointment.
Can I be my own registered agent in Connecticut?
Yes, if you are a Connecticut resident. You will need to list a business street address and your Connecticut residence address, and you must be reachable to accept legal papers. Out-of-state owners need a Connecticut individual or a business entity with a Connecticut address.
How do I change my registered agent in Connecticut online?
Log in to Business.CT.gov, select your business, and file a Change of Agent with the new agent’s name and Connecticut address. The new agent must accept the appointment. Pay the $50 fee by card. Expedited service is available only for online filings.
When is the Connecticut LLC annual report due?
Connecticut LLC annual reports are filed online each year between January 1 and March 31, and the fee is $80 for a domestic LLC, according to Business.CT.gov. You can check your company’s next due date through the Connecticut online business search.
Does a Connecticut registered agent need to accept the appointment?
Yes. The Secretary of the State’s Change of Agent form requires the appointed agent to sign an acceptance of appointment. For a business acting as agent, the person signing on its behalf prints their name and title under the signature.
What happens if my Connecticut registered agent resigns?
The agent files a Resignation of Agent with the Secretary of the State, which costs $50 and has no standard form, according to Business.CT.gov. Your business should then appoint a new agent by filing a Change of Agent, also $50, so legal papers and state notices continue to reach the company.
What is the best registered agent in Connecticut?
Our recommendation is Mainstay Filing, at $149 a year with the same renewal price and the agent change handled for you. CT Registered Agent.org is an alternative at a flat $99 per year, with an in-state street address and online access to scanned documents.
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