How to Start a Sole Proprietorship in Connecticut

Last updated: March 13th, 2024
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Starting a business as a sole proprietorship in Connecticut is relatively simple. While there are no formal registration requirements, there are certain legal obligations and steps that you should follow to ensure your business is set up properly and compliant with state regulations. This comprehensive guide will walk you through starting a sole proprietorship in Connecticut, from choosing a business name to obtaining necessary licenses and permits and registering for taxes.

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What is a sole proprietorship?

A sole proprietorship is an informal business structure where an individual operates a business as the sole owner. It is the simplest and most common form of business ownership, popular with startups and entrepreneurs. It is characterized by its ease of setup and minimal legal requirements. As a sole proprietor, you have full control and decision-making authority over your business, but you are personally liable for any debts it incurs.

A step-by-step guide to starting your Connecticut sole proprietorship


Choose a business name

If you are a sole proprietor in Connecticut, you can operate your business under your own legal name or you can create a fictitious business name, also known as an assumed name or “doing business as” (DBA).

You can register your DBA name by completing the following steps:

  1. Choose a business name: Brainstorm possible names for your business, think of something that is memorable and descriptive of what your business does.
  2. Check availability: Your trade name cannot match any other registered business name in the state. Navigate to the Connecticut Secretary of State‘s website and conduct a name search to make sure it is available.

When selecting your DBA name, your name must be unique. Conducting quick online screening searches can help determine if competitors have similar names. We also recommend searching the US Patent and Trademark Office’s trademark database to double-check that you aren’t infringing on another company’s intellectual property.

  1. Check online availability: Check if the domain name is available for a website and if desired social media handles are available. Registering a website domain that matches your company name can boost your business’s credibility and brand recognition. Owning the domain prevents competitors from using it and helps customers easily find your website. Securing social media usernames that match your business name allows you to build a stronger online presence and identity across platforms.
  2. Register the business name: The next step to make it official by registering a trade name certificate with the town clerk’s office. File a Certificate of Trade Name with the clerk in the town where your business is located. If your business operates in multiple towns, you must register the DBA name in each separate town a filing fee is required for each DBA name. A full list of town contact information can be found on the Connecticut Town Clerks Association website.

Obtain an (Employer Identification Number) EIN

While obtaining an Employer Identification Number (EIN) is not mandatory for sole proprietors without employees, it is recommended.

An EIN is a nine-digit number issued by the Internal Revenue Service (IRS). It serves as a unique identifier for your business and can provide several benefits:

  • Opens up business banking opportunities: Having an EIN allows you to open a business bank account separate from your accounts. This separation helps you maintain clear financial records and simplifies tax filing.
  • Helps establish business credit: With an EIN, you can start building a separate credit history for your business, which may be beneficial when applying for loans or lines of credit.
  • Eases the hiring process: If you plan to expand your sole proprietorship and hire employees, having an EIN is necessary for payroll tax reporting and other employment-related requirements.
  • Enhances business privacy: Using an EIN instead of your Social Security Number (SSN) on invoices and contracts adds an extra layer of privacy and identity protection.
  • Prepares for business growth: If you have plans to grow your business and potentially convert it into a different business entity, such as a Limited Liability Company (LLC) or a corporation, having an EIN is a crucial step in the transition process.

Register through the IRS website or click here to obtain an EIN.


Obtain Connecticut business licenses, permits, and zoning clearances

Depending on the nature of your business, you may need to obtain specific licenses, permits, and zoning clearances at the local, state, or federal level.

  • Connecticut doesn’t require a general state-level business license. However, any business with a physical presence in the state that sells, rents, or provides a taxable service must register for a sales and use tax permit. You can register for the permit using the myconneCT portal.
  • Depending on your business type, you may have to apply for additional industry-specific licenses. For example, alcohol and aviation are regulated by the federal government, and additional licenses are needed. You can find more information on the Small Business Administration website.
  • The Connecticut Department of Consumer Protection website is a valuable resource for working out what necessary licenses and permits you may need.
  • The CT license and permit center provides a digital assistant to help find the most common licenses required in your industry.
  • Certain Connecticut counties may have their own local licensing requirements. Check your county and city website to see if there are any local regulations to be aware of.

Register for taxes

As a sole proprietor in Connecticut, you must report your business income and expenses on your personal income tax return (Form 1040). This is done by attaching a Schedule C to your personal tax returns. It is important to keep detailed records of your business transactions and expenses to report your business income accurately.

As a self-employed sole proprietor, you owe self-employment tax contributions for Social Security and Medicare, which you can calculate and report using Schedule SE.

Access the most current versions of Form 1040Schedule C, and Schedule SE on the IRS website.

Additional state and local taxes

  • In addition to federal taxes, Connecticut imposes certain state and local business taxes on businesses.
  • The most common state tax for sole proprietors is the Connecticut business entity tax, which applies to corporations and sole proprietorships. The amount of the tax varies based on the business’s annual gross receipts.
  • Depending on your business activities, you may also be subject to sales tax and use tax.
  • Consult the Connecticut Department of Revenue Services to understand and fulfill your tax obligations.
  • The newly launched myconneCT website is a helpful online tool that can help determine which taxes your business owes and you can automatically register to pay these.

Additional steps

Completing your EIN application, federal tax registration, and securing necessary licensing checks the core boxes for establishing your sole proprietorship. With the legal basics covered, it’s wise to take extra steps to set up your new business for ongoing success.

Below are some recommended best practices for remaining compliant and keeping your sole proprietorship running smoothly as it grows.


Open business bank accounts

Keeping your business and personal finances separated is key for accurate recordkeeping and protecting your assets. Think about opening:

  • Business bank account: A dedicated business account to manage income, expenses, and transactions maintains clear separation from your funds. This also lends credibility when working with vendors or applying for financing.
  • Business credit card: Opening a card in your business’s name further segments spending and builds credit history specific to your company’s financial profile.

Get liability insurance

Sole proprietors carry unlimited liability for business obligations, so insurance is critical. Policies can shield against unexpected claims or events. Consider:

  • General business liability insurance: Covers claims of property damage, bodily harm, or personal injury resulting from your operations.
  • Professional liability insurance: For service providers, it protects against alleged negligence, errors, or omissions in delivering your services.

Maintain business records

Maintaining detailed records is key to optimizing tax deductions and keeping your sole proprietorship’s finances in order. You should aim to accurately record:

  • Earnings
  • Costs
  • Assets and debts
  • Stock
  • Invoices

Using bookkeeping software, spreadsheets, or implementing a structured system can help manage documents. This will be beneficial for tax submission and maintaining the overall financial well-being of your business.

Sole proprietorship vs. LLC

For certain small business owners and startups, forming a limited liability company (LLC) may be better than operating as a sole proprietorship. LLCs have some key advantages:

  • Liability protection: LLCs legally separate your personal and business assets, which sole proprietorships do not.
  • Credibility: The formal LLC structure appears more professional to customers.
  • Growth potential: LLCs are well-suited if you aim to expand your business over time.
  • Tax flexibility: LLCs allow you to choose how your business income is taxed.

However, LLCs also have some downsides:

  • Complexity: LLCs require you to fill in articles of organization and draft an operating agreement and annual reporting. Sole proprietorships involve less paperwork.
  • Cost: Forming and maintaining an LLC has higher upfront and ongoing costs than a sole proprietorship.

Tips when deciding:

  • Consult a tax professional to determine the better structure for your business needs.
  • Compare liability protection needs against a desire for simplicity.

Useful resources to help start your sole proprietorship in Connecticut


Do I need to register my sole proprietorship with the state of Connecticut?

No, there is no formal registration requirement for sole proprietorships in Connecticut.

Do I need a business license to operate as a sole proprietor in Connecticut?

The licenses and permits required for your sole proprietorship will depend on the nature of your business activities. Certain professions and industries may require specific licenses or certifications. Researching and complying with any licensing requirements applicable to your business is important.

How much does a Connecticut sales tax permit cost?

A sales tax permit is $100 and needs to be renewed every two years.

Can I convert my sole proprietorship to an LLC in the future?

Yes, converting your sole proprietorship to an LLC is possible if you change your business structure. Converting to an LLC involves filing the necessary documents and complying with state regulations.

Do I need a registered agent for my Connecticut sole proprietorship?

No, sole proprietorships are not required to designate a registered agent in Connecticut. Appointing a registered agent is only mandatory for corporations and LLCs in the state.

What is the difference between a single-member LLC and a sole proprietorship?

The main difference is liability protection. You have unlimited personal liability as a sole proprietor, whereas a single-member LLC limits the owner’s liability.

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