How To Start An LLC In Connecticut: Step-By-Step Guide (Apr. 2026)

Connecticut provides a reliable business environment, a well-educated workforce, and convenient access to major Northeast markets. This makes it an attractive choice for entrepreneurs planning to start a Limited Liability Company (LLC).

To form an LLC in Connecticut, you must submit a Certificate of Organization to the Secretary of the State and pay the $120 filing fee. The state typically processes online filings within two to three business days, allowing most businesses to complete the initial setup quickly.

However, maintaining compliance involves additional requirements. These include registering for state taxes, securing any necessary licenses or permits, submitting your Annual Report, and meeting ongoing tax responsibilities.

While the process may appear technical at first, the state’s online Business Services portal is user-friendly. Plus, it provides all the required forms, guidance, and filing tools needed throughout the formation process.

To make the steps easier to follow, I’ve broken down the Connecticut LLC process into clear formation stages. Then, I’ve explained the essential steps to complete after your LLC’s approval. By the end of this article, you’ll know exactly how to start an LLC in Connecticut.

How To Start An LLC In Connecticut?

Starting an LLC in CT is straightforward when you follow the state’s required filings and procedures. Below, I’ve listed the main steps to help you form your Connecticut LLC online while avoiding delays or rejected submissions.

Here is an overview of how to start an LLC in Connecticut, step-by-step:

1. Search And Choose Your LLC Name

Your first task is to confirm that your intended Connecticut LLC name is available. It needs to be unique and clearly distinguishable from all other businesses registered with the Secretary of the State. If the name is already taken or too similar to an existing entity, your Certificate of Organization will be denied.

Use the Connecticut Business Records Search to verify name availability. This tool checks your preferred LLC name against existing state records to ensure it complies with Connecticut’s distinguishability standards.

2. Designate A Registered Agent

Under Connecticut General Statutes § 34-243n, you need to appoint a Registered Agent for your LLC.

The Registered Agent needs a physical street address in Connecticut where legal documents can be served; P.O. boxes are not permitted. Plus, your agent should be available at that location during standard business hours to receive official, time-sensitive state correspondence. The Secretary of State lists the agent’s name and address in its public records.

Connecticut provides several options when selecting your agent. You can serve as your own Registered Agent if you reside in Connecticut or designate a trusted individual with a Connecticut address. Alternatively, you can use a commercial Registered Agent service. Many business owners choose a professional service for added privacy and dependability, since the agent’s address becomes public.

For recommended providers, refer to my complete Connecticut Registered Agent guide.

3. Submit Your Connecticut Certificate Of Organization

To formally establish your Connecticut LLC, you’ll need to submit a Certificate of Organization to the Connecticut Secretary of the State. This is one of the main parts of learning how to form an LLC in Connecticut.

This requirement is mandated by the Connecticut General Statutes § 34-247. Basically, it outlines that an LLC is formed only when its Certificate of Organization becomes effective. Until this document is filed and approved, your LLC doesn’t legally exist.

You have three ways to file your Certificate of Organization:

• File online through Connecticut’s official state website.
• Submit e-filing through Connecticut’s digital filing portal.
• Mail your application to the Business Services Division of the Connecticut Secretary of the State at P.O. Box 150470, Hartford, CT 06115-0470.

The state typically approves online filings within 2–3 business days, while it processes digital paper submissions in 3–5 business days. Physical paper filings sent by mail, FedEx/UPS, or hand delivery take the longest. That said, they usually require 7–10 business days in addition to mailing time.

The submission fee for all methods is $120. Additionally, Connecticut provides a $50 expedited processing option for online and digital paper submissions, which reduces the standard processing timeframe.

For detailed submission instructions, see my article: How To File A Connecticut LLC Certificate Of Organization.

4. Write An Operating Agreement

An Operating Agreement is not required by the Connecticut Secretary of State. However, it’s one of the most valuable internal documents your LLC can create.

It defines how the company is owned, managed, and operated. Plus, it provides a clear framework for resolving disputes, handling membership changes, and guiding daily decision-making.

In practice, I suggest that every Connecticut LLC (Even single-member LLCs) put a written Operating Agreement in place from the start.

Your Operating Agreement should accurately reflect how your LLC manages its structure, whether as member-managed or manager-managed.

You can use the free templates below and tailor the version that best suits your Connecticut LLC. For more detailed instructions, see my guide on preparing an Operating Agreement For A Connecticut LLC.

5. Get An EIN For Your Connecticut LLC

After preparing your Operating Agreement, the next step is to secure an Employer Identification Number (EIN) from the IRS.

An EIN is a nine-digit federal identifier that registers your LLC for tax reporting, banking, licensing, and onboarding employees. It has the same meaning as a Federal Employer Identification Number (FEIN) or Federal Tax ID Number. Keep in mind that these terms all describe the same number.

You can apply for an EIN only after the state accepts your Certificate of Organization. The IRS needs your LLC’s official formation status before issuing your EIN.

The EIN itself is issued at no cost. The application process depends on your residency status:

• For U.S. residents: You can apply online through the IRS EIN Assistant if you hold an SSN or ITIN. This is the fastest method, typically taking about 15 minutes, with immediate approval. Step-by-step details are available here: Obtain Your EIN By Online Submission.
• For non-U.S. residents: Online applications are not available. Instead, you need to complete Form SS-4 and submit it by fax or mail. Processing may take up to four weeks, depending on IRS workload and delivery times. Instructions can be found here: Using Form SS-4 For Mail-In EIN Submission.

Once approved, the IRS issues an EIN Confirmation Letter (Form CP 575). For a more detailed explanation, refer to my guide: How To Get An EIN For A Connecticut LLC.

You need an EIN to open a business bank account, hire employees, register for state or local tax accounts, and secure Connecticut business licenses and permits. In practical terms, your LLC can’t operate fully or stay compliant without it.

6. Secure The Necessary Connecticut Business Licenses And Permits

Connecticut doesn’t impose a single universal business license for all LLCs. Your company will still need various regulatory approvals before it can operate legally.

Most LLCs need to register with the Department of Revenue Services (DRS). Additionally, many industries require additional state or local permits based on their specific activities and location.

a. Sales And Use Tax Permit

If you sell taxable products or provide taxable services through your LLC, you are required to obtain a Sales and Use Tax Permit. You can get one from the Department of Revenue Services. This permit allows your business to register, collect, report, and remit Connecticut sales and use tax. Connecticut General Statutes § 12-409a, § 12-410, and § 12-411 support this obligation.

The application is submitted under your Connecticut Tax Registration Number (CT REG). The first scenario is if your LLC hasn’t previously registered with the Department of Revenue Services (DRS). In this case, applying for a Sales & Use Tax Permit will automatically create a CT REG. This number is generated during the tax registration process.

The other scenario is if your LLC already has a CT REG from registering for withholding tax or another DRS-administered tax, for example. In this situation, you will continue using that same number when applying for your Sales & Use Tax Permit.

A $100 state fee applies to this process. Online Connecticut LLC registration for a Sales Tax License is completed using Form REG-1 (Business Taxes Registration Application). You’ll file through the myconneCT portal, and it’s typically processed within 1–2 business days.

I recommend reading my full guide: How To Obtain Your Connecticut LLC Sales Tax License.

c. Municipal Approvals And Industry-Specific State Licensing

Your LLC may require municipal permits, inspections, or zoning approval before running operations from a physical location. For instance, restaurants often need local food permits. Childcare centers might need municipal and state approval. Storefronts might go through zoning or fire inspections.

Additionally, Connecticut regulates many industries at the state level. Relevant agencies issue professional and occupational licenses for each field. You can find out which licenses that your LLC may need on this official page: Connecticut Business Licenses and Permits.

You can learn more about licensing regulations here: Obtaining Connecticut LLC Business Licenses.

What Comes After LLC Approval?

After the state approves your Connecticut LLC, your compliance responsibilities continue. Approval marks the beginning of your ongoing legal obligations.

To maintain your LLC’s good standing, you’ll need to complete several required post-formation steps:

1. Open A Business Bank Account

Your top priority is opening a dedicated business bank account. Doing so will separate your personal and business finances to protect your liability status.

This separation also confirms your LLC as a distinct legal entity. Other advantages of this split are that it simplifies bookkeeping, improves financial clarity, and decreases complications during tax filing.

2. File The Connecticut Annual Report

Every Connecticut LLC needs to submit an Annual Report to keep business records current with the state. This filing updates your address, management structure, and ownership information. It also ensures your LLC remains in good standing. Connecticut General Statutes § 34-247k requires all LLCs to submit this report and pay the required state fee.

Connecticut charges an $80 filing fee for filing the Annual Report. Additionally, the state requires online submission through the Connecticut Official State Website’s official Annual Report filing system.

You’ll need to submit your first Annual Report during the next reporting window after formation. This window runs from January 1 to March 31. Each following year, your LLC must file within the same January-through-March period.

For example, if the state approves your LLC on November 15, 2026, the first report is due by March 31, 2027.

For detailed filing instructions on the Annual Report, read my article: Connecticut LLC Annual Report Filing Instructions.

3. Understand Connecticut Taxes

Your Connecticut LLC isn’t charged federal income tax at the entity level. Alternatively, profits pass directly to members, who report them on personal returns.

The IRS may tax your LLC in several ways:

• A single-member LLC is treated as a sole proprietorship for federal tax purposes.
• A multi-member LLC is considered a partnership and files a partnership return.
• You may also choose S-Corporation or C-Corporation taxation by submitting the proper IRS election forms.

At the state level, your LLC may owe the following taxes:

• Sales and use tax if you sell taxable goods or services.
• Withholding tax if you employ workers.
• Pass-through entity tax for qualifying multi-member LLCs or elected entities.
• Other industry-specific taxes based on your operations.

Connecticut LLC – Contact Details

If you need help forming or maintaining your Connecticut LLC, the state agencies presented in the table below will be useful. They oversee business filings, tax registration, licensing, and regulatory compliance. These offices serve as the main points of contact, depending on your business activities.

Frequently Asked Questions