How to Start an LLC in Connecticut

Starting an LLC in Connecticut requires filing a Certificate of Organization with the state, appointing a registered agent, and maintaining ongoing compliance. Connecticut offers business-friendly formation processes with reasonable filing fees and straightforward requirements. Whether you’re launching a tech startup in Hartford or a consulting business in New Haven, understanding how to start an LLC in Connecticut properly will protect your personal assets and establish credibility for your business.

Table of Contents

• Step 1: Choose Your LLC Name
• Step 2: Appoint a Registered Agent
• Step 3: File Your Certificate of Organization
• Step 4: Create an Operating Agreement
• Step 5: Get Your Federal EIN
• Step 6: Ongoing Compliance and Taxes
• Connecticut LLC Cost Breakdown
• Frequently Asked Questions

Step 1: Choose Your LLC Name

Your Connecticut LLC name must be distinguishable from existing business names registered in the state and include a proper LLC designator. The state maintains a searchable database where you can verify name availability before filing.

Connecticut LLC Name Requirements

Connecticut requires your LLC name to meet these specific criteria:

• LLC Designator: Must include “Limited Liability Company,” “LLC,” “L.L.C.,” or other approved variations
• Distinguishable: Cannot be confusingly similar to existing registered business names in Connecticut
• Prohibited Terms: Cannot suggest banking, insurance, or professional services without proper licensing
• Professional LLCs: Must include “Professional Limited Liability Company” or “PLLC” if providing professional services

Search for name availability through the Connecticut Secretary of State’s business entity database. If your preferred name is available, you can proceed with formation or reserve it for future use.

Name Reservation Option

Connecticut offers optional name reservation for $60 through the Application for Reservation of Name. This reserves your chosen name for 90 days, giving you time to prepare your formation documents without risking someone else claiming the name.

Step 2: Appoint a Registered Agent

Connecticut law requires every LLC to maintain a registered agent with a Connecticut address. This person or entity receives official legal documents, tax notices, and compliance reminders on behalf of your LLC.

Registered Agent Requirements

Your registered agent must meet these Connecticut requirements:

• Maintain a physical Connecticut address (not a P.O. Box)
• Be available during regular business hours
• Accept service of legal documents
• Forward important notices to LLC owners

You can serve as your own registered agent if you have a Connecticut address, but many business owners prefer professional services for privacy and reliability.

Professional Registered Agent Services

Professional registered agent services handle document receipt, mail forwarding, and compliance notifications. They typically charge $125-200 annually and provide several advantages over self-service:

• Privacy protection for your home address
• Guaranteed availability during business hours
• Professional handling of legal documents
• Compliance calendar and deadline reminders

Step 3: File Your Certificate of Organization

The Certificate of Organization is Connecticut’s official formation document that legally creates your LLC. You’ll file this document with the Connecticut Secretary of State along with the required $120 filing fee.

Required Information for Connecticut Certificate of Organization

Connecticut’s Certificate of Organization requires these essential details:

• LLC Name: Your exact legal name including LLC designator
• Principal Office: Your LLC’s main business address
• Registered Agent: Name and Connecticut address of your registered agent
• Management Structure: Member-managed or manager-managed designation
• NAICS Code: Primary business activity code (required by Connecticut)
• Members/Managers: Connecticut requires listing at least one member or manager

Filing Methods and Processing Times

Connecticut accepts Certificate of Organization filings through multiple channels:

• Online Filing: $120 fee, 5-7 business days processing, expedited options available
• Paper Filing: $120 fee, 5-7 business days processing, no expedited options
• Expedited Filing: Available online only, specific fees available upon request

Most business owners choose online filing for convenience and access to expedited processing. Make checks payable to “Secretary of the State” for paper submissions.

Step 4: Create an Operating Agreement

While Connecticut doesn’t legally require an operating agreement, creating this document is essential for multi-member LLCs and highly recommended for single-member LLCs. The operating agreement defines ownership structure, management responsibilities, and operational procedures.

Why You Need an Operating Agreement

An operating agreement provides several critical benefits:

• Legal Protection: Reinforces the separation between personal and business assets
• Management Clarity: Defines roles, responsibilities, and decision-making processes
• Dispute Prevention: Establishes procedures for resolving conflicts
• Financial Structure: Outlines profit/loss distribution and capital contributions
• Succession Planning: Addresses member departure, death, or disability

Key Operating Agreement Provisions

Your Connecticut LLC operating agreement should address these essential areas:

• Ownership percentages and capital contributions
• Management structure (member-managed vs. manager-managed)
• Voting rights and decision-making procedures
• Profit and loss allocation
• Member withdrawal and transfer restrictions
• Dissolution procedures

Consider consulting with a Connecticut business attorney to ensure your operating agreement complies with state law and addresses your specific business needs.

Step 5: Get Your Federal EIN

Your Employer Identification Number (EIN) serves as your LLC’s federal tax identification number. You’ll need this number to open business bank accounts, file tax returns, and handle other business transactions.

When You Need an EIN

Connecticut LLCs typically need an EIN for:

• Opening business bank accounts
• Filing federal and state tax returns
• Hiring employees
• Working with vendors and suppliers
• Applying for business licenses

How to Obtain Your EIN

Apply for your EIN directly through the IRS website for free. The online application is typically the fastest method, providing your EIN immediately upon completion.

Alternative application methods include:

• Online: Immediate processing, available 24/7
• Phone: Call (800) 829-4933, receive EIN during call
• Fax: Send completed Form SS-4, receive EIN within four business days
• Mail: Send completed Form SS-4, receive EIN within four weeks

Step 6: Ongoing Compliance and Taxes

Connecticut LLCs must maintain ongoing compliance through annual reporting, tax obligations, and record-keeping requirements. Understanding these responsibilities helps avoid penalties and maintains your LLC’s good standing.

Annual Report Requirements

Connecticut requires all LLCs to file an annual report between January 1 and March 31 each year. The annual report fee is $80 and must be filed online through the Connecticut Secretary of State’s website.

The annual report requires basic information updates including:

• Current registered agent information
• Principal office address
• Member or manager information
• Business activity updates

Connecticut Tax Obligations

Connecticut LLCs face several potential tax obligations:

• Entity Tax: Connecticut imposes a 3-6.99% entity tax on LLC income
• Sales Tax: $100 permit required for businesses collecting sales tax
• Federal Taxes: Most LLCs file as pass-through entities for federal tax purposes
• Employment Taxes: Required if your LLC has employees

Consult with a Connecticut tax professional to understand your specific tax obligations and ensure proper compliance.

Business Banking and Record-Keeping

Maintaining separate business finances is crucial for protecting your LLC’s limited liability protection. Open a dedicated business bank account using your Certificate of Organization and EIN.

Keeping your business finances separate from personal accounts helps establish the credibility of your LLC as a distinct legal entity. This separation is particularly important if you ever face legal challenges or need to demonstrate your business’s legitimacy to lenders or partners.

Professional banking services can help your LLC manage cash flow, earn interest on business funds, and maintain the financial records necessary for tax compliance. Look for banks that offer business checking accounts with no monthly fees, unlimited transactions, and digital banking tools designed for small businesses.

Connecticut LLC Cost Breakdown

Understanding the complete cost structure helps you budget appropriately for forming and maintaining your Connecticut LLC. Here’s a comprehensive breakdown of all fees and expenses:

Expense Category	Cost	When Due	Notes
Certificate of Organization Filing	$120	At formation	Same fee for online or paper filing
Name Reservation (Optional)	$60	Before filing	Valid for 90 days
Registered Agent Service	$125-200/year	Annually	Can self-serve for free if CT resident
Annual Report	$80	January 1 – March 31	Filed online annually
Expedited Processing	Fee varies	Optional at filing	Available online only
Amendment (if needed)	$120	As needed	For changes to Certificate
Certificate of Good Standing	$50	As needed	For banking, contracts, etc.
Registered Agent Change	$50	As needed	If changing registered agent
Sales Tax Permit	$100	If applicable	For businesses collecting sales tax
Dissolution (if needed)	$0	When closing	No fee for dissolution

Source: Connecticut Secretary of State, verified March 2026

First-Year Cost Summary

For a typical Connecticut LLC, expect these first-year costs:

• Minimum Cost: $200 (filing fee + annual report, self-serve registered agent)
• Typical Cost: $325-420 (including professional registered agent service)
• With Expedited Filing: Add expedited processing fee (amount varies)

Frequently Asked Questions

How long does it take to form an LLC in Connecticut?

Connecticut processes Certificate of Organization filings within 5-7 business days for both online and paper submissions. Expedited processing is available for online filings only, with specific fees available upon request from the Secretary of State.

Do I need a Connecticut address to form an LLC in Connecticut?

You don’t need a Connecticut address to form an LLC, but you must appoint a registered agent with a physical Connecticut address. This registered agent will receive legal documents and official notices on behalf of your LLC.

Can I be my own registered agent in Connecticut?

Yes, you can serve as your own registered agent if you maintain a physical Connecticut address and are available during regular business hours. However, many business owners prefer professional registered agent services for privacy and reliability.

What’s the difference between member-managed and manager-managed LLCs in Connecticut?

Member-managed LLCs are run directly by the owners (members), while manager-managed LLCs appoint specific managers to handle daily operations. You must specify your management structure on the Certificate of Organization. Member-managed is most common for smaller LLCs with active owners.

Does Connecticut require an operating agreement?

Connecticut doesn’t legally require an operating agreement, but it’s strongly recommended for all LLCs. This document defines ownership structure, management responsibilities, and operational procedures. It’s especially important for multi-member LLCs to prevent disputes and clarify each member’s rights and responsibilities.

What business licenses might my Connecticut LLC need?

License requirements vary by business type and location. Common licenses include general business licenses from your city or county, professional licenses for regulated industries, and sales tax permits if you sell taxable goods. Check with Connecticut’s Department of Consumer Protection and your local municipality for specific requirements.

Additional Business Services for Your Connecticut LLC

Once your LLC is formed, you’ll need several additional services to operate effectively. Here are the essential services most Connecticut LLCs require:

Business Accounting and Bookkeeping

Proper financial record-keeping is essential for tax compliance, business decision-making, and maintaining your LLC’s limited liability protection. You’ll need to track income, expenses, and prepare for annual tax filings.

Look for accounting software that handles LLC tax requirements, integrates with business banking, and provides the financial reports you need for growth planning. The right system should simplify tax preparation and help you understand your business’s financial performance.

Business Insurance Protection

While your LLC structure provides personal asset protection, business insurance protects your company assets and operations. Most Connecticut LLCs need general liability insurance, and many require additional coverage based on their specific business activities.

Consider business insurance that covers property damage, professional liability, and cyber security incidents. Digital-first insurance providers often offer streamlined applications and competitive rates for small business coverage.

Professional Website and Online Presence

A professional website establishes credibility and helps potential customers find your Connecticut LLC. Even service-based businesses benefit from an online presence that showcases their expertise and makes it easy for clients to get in touch.

Choose web hosting that offers easy website building tools, reliable uptime, and room for growth as your business expands. Look for providers that include domain registration, email accounts, and security features in their packages.

Next Steps for Your Connecticut LLC

Forming your Connecticut LLC is just the beginning of your business journey. After completing the formation process, focus on these important next steps:

• Obtain necessary business licenses and permits
• Set up business banking and accounting systems
• Secure appropriate business insurance coverage
• Develop your brand identity and marketing materials
• Create systems for ongoing compliance and record-keeping

Connecticut offers excellent resources for new businesses, including the Connecticut Small Business Development Center, which provides free consulting and training programs. The state’s business-friendly environment and strategic location make it an excellent choice for LLCs across many industries.

For more information about forming LLCs in other states, explore our comprehensive LLC state guides covering formation requirements, fees, and compliance obligations nationwide. Each state has unique requirements, so understanding the specific rules for your target state ensures proper formation and ongoing compliance.

This information is for educational purposes only and does not constitute legal or financial advice. Filing fees and requirements change : always confirm current fees with your state’s Secretary of State office.