Connecticut LLC Name Search: Check Availability

Before you file your Certificate of Organization in Connecticut, you need to verify your chosen LLC name is available. Connecticut will reject your filing and keep your $120 fee if your name conflicts with an existing business entity. This comprehensive guide walks you through checking name availability using the state’s official database and understanding Connecticut’s LLC naming requirements.

How to Search for Connecticut LLC Names

Connecticut provides a free online business entity search tool through the Secretary of State’s office. Here’s how to use it effectively:

Step 1: Access the Official Search Tool

Visit the Connecticut Secretary of State’s business entity search at business.ct.gov. This database contains all registered business entities in Connecticut, including active, inactive, and dissolved companies.

Step 2: Enter Your Proposed Name

Type your desired LLC name exactly as you want it to appear on your Certificate of Organization. Include the required LLC designator (more on this below). The search is not case-sensitive, but spelling and punctuation matter.

Step 3: Review Search Results

The system will return any matching or similar names. Pay attention to:

• Exact matches (your name is unavailable)
• Similar names that differ only by entity type or punctuation
• Names with different designators but identical business portions
• Inactive or dissolved entities that might create confusion

Step 4: Test Variations

If your first choice is taken, try variations using different designators, abbreviations, or word arrangements. Search each variation thoroughly before settling on an alternative.

Source: Connecticut Secretary of State, verified March 2026

Connecticut LLC Naming Rules

Connecticut has specific requirements for LLC names that you must follow to avoid rejection:

Required Designators

Your LLC name must include one of these designators:

• Limited Liability Company
• LLC
• L.L.C.
• Ltd. Liability Co.
• Limited Liability Co.

You cannot use abbreviations like “LC” or alternative spellings. The designator must appear exactly as listed above.

Distinguishability Requirements

Your LLC name must be distinguishable from all existing business entities in Connecticut. The Secretary of State considers names too similar if they differ only by:

• Entity type designators (LLC vs. Inc. vs. Corp.)
• Articles (the, a, an)
• Punctuation marks
• Abbreviations of the same word

Prohibited Words and Restrictions

Connecticut restricts certain words that suggest government affiliation, regulated professions, or could mislead the public:

• Bank, banking, trust, insurance (without proper licensing)
• Professional designations (doctor, lawyer, architect) unless properly licensed
• Government terms (federal, state, treasury, FBI)
• University, college (without educational authorization)

Some restricted words may be available with additional documentation proving you’re authorized to use them.

Name Reservation in Connecticut

Connecticut offers name reservation if you need time to prepare your LLC formation documents or want to secure a name before you’re ready to file.

Reservation Details

• Fee: $60
• Duration: 120 days
• Extensions: Available for additional periods
• Form: Application for Reservation of Name

Name reservation isn’t required, but it’s helpful if you’re working with investors, partners, or need time for trademark searches. The reservation prevents others from registering your chosen name while you prepare.

Tips for Choosing an Effective LLC Name

Beyond legal requirements, consider these factors when selecting your LLC name:

Business and Marketing Considerations

• Choose something memorable and easy to pronounce
• Avoid numbers, hyphens, and unusual spellings that complicate verbal communication
• Consider how the name will look on business cards, websites, and marketing materials
• Think about future expansion: overly specific names may limit growth

Domain Availability

Check if matching domain names are available for your website. Your LLC name doesn’t have to match your domain exactly, but consistency helps with branding and customer recognition.

Trademark Considerations

Search the USPTO trademark database to ensure your name doesn’t infringe on existing trademarks. While Connecticut only checks state-level conflicts, trademark issues can create costly legal problems later.

Using a DBA for Different Operating Names

If you want to operate under a name different from your registered LLC name, Connecticut allows “Doing Business As” (DBA) filings. This lets you:

• Use a more customer-friendly name
• Operate multiple brands under one LLC
• Test different business names without changing your LLC registration

DBA fees vary by county where you plan to do business. You’ll file with the town clerk in each municipality where you’ll use the assumed name.

Professional Service LLCs

Connecticut allows professionals like doctors, lawyers, and accountants to form Professional Limited Liability Companies (PLLCs). These have additional naming requirements:

• Must include “Professional Limited Liability Company,” “PLLC,” or “P.L.L.C.”
• Cannot use regular LLC designators
• Must indicate the professional service provided
• Requires professional licensing verification

What Happens After Name Approval

Once you’ve confirmed your LLC name is available, you’re ready to file your Certificate of Organization. Connecticut requires:

• $120 filing fee
• Registered agent appointment
• NAICS industry code
• Manager or member information

You can file online or by mail, though expedited processing is only available online. For complete formation guidance, see our Connecticut LLC formation guide.

Common Name Search Mistakes to Avoid

Avoid these frequent errors that can delay your LLC formation:

• Only checking exact matches: Search similar spellings and word arrangements
• Forgetting about dissolved entities: These can still create conflicts
• Ignoring trademark databases: State availability doesn’t guarantee trademark clearance
• Using temporary designators: Don’t include “temp” or “pending” in your actual LLC name
• Assuming availability means approval: The Secretary of State makes the final determination

Additional Connecticut Resources

For comprehensive information about forming your Connecticut LLC, explore these related topics:

• Connecticut LLC tax requirements and obligations
• Connecticut registered agent services and requirements
• Understanding your ongoing compliance obligations

Connecticut’s business-friendly environment makes it an excellent choice for LLC formation. With proper name research and compliance with state requirements, you’ll be operating legally and protecting your business interests.

Source: Connecticut Secretary of State, verified March 2026

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.