How Much Does It Cost to Start a Business in Connecticut

Starting a business in Connecticut requires navigating several mandatory costs and optional expenses. Most first-time founders underestimate how many fees stack up before the doors open, which is why understanding these costs upfront is essential to your financial planning.

The total cost to start a business in Connecticut ranges from roughly $300 to $2,000 or more, depending on your business structure and industry. Most of that cost centers on state filing fees, ongoing compliance, and professional services. This guide breaks down each expense category so you know exactly what to expect.

State Business Formation Costs

Your first expense is the state filing fee itself. Connecticut charges different fees depending on whether you form an LLC or a corporation, and whether you want expedited processing.

Limited Liability Company (LLC) Formation

The most popular choice for new businesses is an LLC. Connecticut's Secretary of the State charges a $120 filing fee for a Certificate of Organization, which is the document that registers your LLC.

The process is straightforward. You file online through Business.CT.gov, the state's official filing portal. Once submitted, most online filings are accepted automatically, so the state says expedited service is usually unnecessary. If you do request expedited review, add $50 and expect processing within 24 hours.

Before you file, you should check if your desired business name is available. Connecticut's business search tool at service.ct.gov/business/s/onlinebusinesssearch is free to use. The name must include the words "Limited Liability Company" or an abbreviation like "LLC" or "L.L.C.", and it must be distinguishable from other names already registered with the state. If your preferred name is available but you are not ready to file yet, you can reserve it for 120 days by paying a $60 reservation fee.

So the baseline for an LLC is $120. Add $60 if you want to reserve the name first, and $50 if you want expedited processing. That covers the state filing only.

Corporation Formation

If you incorporate as a stock corporation instead, expect higher costs. Connecticut charges $250 to file a Certificate of Incorporation. Corporations in Connecticut also must file an Organization and First Report, which adds $150 to the initial cost. That brings total incorporation costs to $400 just for the state filings.

Corporations come with more paperwork and compliance obligations than LLCs, and they're typically chosen when you plan to raise outside investment or when the additional legal separation matters for liability reasons. For most early-stage businesses, an LLC is simpler and cheaper.

Trade Name Certificate (DBA)

If you want to operate under a name different from your legal business name, you'll need a Trade Name Certificate, sometimes called a "doing business as" or DBA. This is filed with the town clerk in the Connecticut municipality where your business primarily operates, not with the state. The fee is $20 payable to that town clerk.

Note that a trade name provides no liability protection and does not protect the name from use by someone else; it is only public notice that you are doing business under that name. Forming an LLC or corporation gives you liability protection, and its name must be distinguishable from other names on the Secretary of the State's records.

Ongoing Annual Compliance Costs

State formation is a one-time cost, but Connecticut requires annual filings that cost money every year you operate.

LLC Annual Report

Every LLC must file an Annual Report with the Secretary of the State each year. The fee is $80 per filing. The state does not publish a single statewide deadline. Instead, Business.CT.gov shows each LLC its own next due date when you log into your account. The Secretary of the State's LLC fee page says LLC annual reports are filed online from January 1 to March 31, but confirm your specific deadline by checking your account dashboard.

Corporate Annual Report

Stock corporations also file an Annual Report every year, and the fee is $150. Like LLCs, corporations receive their own personalized due date in their Business.CT.gov account, often in the anniversary month of formation or registration.

Registered Agent Requirement and Cost

Every LLC and corporation in Connecticut must appoint and continuously maintain a registered agent. This is a legal requirement, not optional. The registered agent receives official correspondence and legal documents on behalf of your business, and you must name one when you file your formation documents.

Your registered agent must be either a natural person who is at least 18 years old and resides in Connecticut, or a business entity registered with the Secretary of the State. If you use yourself as the registered agent (which is free), the agent's business address must be a usual place of business in Connecticut that is customarily open during normal business hours with an authorized person present. A post office box does not qualify.

Many owners use professional registered agent services to keep business and personal addresses separate. These services set their own fees, which vary by provider (the agent, attorney and accountant figures in this guide are rough planning estimates, not state fees). Using a service is optional if you meet the registered agent requirements yourself.

Sales Tax and Licensing Costs

If your business sells goods or services that are subject to sales tax, Connecticut requires you to register for a Sales and Use Tax Permit from the Department of Revenue Services (DRS). Registering for the permit costs $100. Once registered, you're responsible for collecting and remitting the state sales tax rate of 6.35%. Connecticut has no additional local sales taxes, though a few categories, such as meals, are taxed at higher state rates (7.35% for meals and certain beverages).

Beyond sales tax, Connecticut has no single general state business license. Licensing depends on your industry. Construction contractors, HVAC technicians, electricians, plumbers, and many other trades require licenses from the Department of Consumer Protection. Child care centers are licensed by the Office of Early Childhood, restaurants and other food service businesses are licensed by the local health department, and many health care providers and facilities are licensed by the Department of Public Health. Insurance-related businesses answer to the Connecticut Insurance Department.

Use the New Business Checklist on Business.CT.gov to determine which licenses and permits apply to your industry. Industry-specific license fees vary widely and are set by each licensing agency or town, so check the fee schedule for your trade or industry and factor it into your budget.

You may also need local permits from your town. Zoning permits, health permits, occupancy permits, and building permits are common and vary by location. Contact your town's building inspector and town clerk to confirm what local permits you need and what they cost.

Professional Services: Attorney and CPA Costs

While not technically a government fee, most new business owners hire legal and accounting help to get started correctly. These costs are optional but valuable.

An attorney can review your business structure choice, prepare an LLC Operating Agreement or corporate bylaws, and ensure all formation documents are filed correctly. Expect to pay $500 to $1,500 for formation services, depending on complexity and your attorney's rates.

A CPA or tax professional can set up your bookkeeping, help you understand Connecticut's tax obligations, and advise on tax elections. Many businesses can file taxes themselves, but an accountant's initial consultation typically costs $300 to $1,000 and can save you money by optimizing your tax position.

Initial Business Expenses Beyond Formation

Government fees are only part of the cost to start a business. You'll also need to fund operating expenses before revenue starts.

Initial business expenses typically include:

• Business insurance (general liability, workers' compensation if you have employees): $500 to $2,000 per year
• Website and domain registration: $50 to $500 depending on complexity
• Office space or equipment: highly variable, $0 if home-based to $5,000 plus per month if you lease
• Initial inventory or supplies: depends on your business
• Business phone and utilities: $50 to $300 per month
• Logo, branding, and marketing: $500 to $5,000 depending on your approach

The sum of these initial business expenses often exceeds the cost of government filings themselves. Budget accordingly.

Connecticut Cost Breakdown by Business Structure

Expense	LLC	Corporation
State formation filing	$120	$250
Name reservation (optional)	$60	$60
Expedited processing (optional)	$50	$50
Annual report (Year 1)	$80	$150
Sales tax permit registration	$100 (if applicable)	$100 (if applicable)
Professional registered agent (optional)	$100 to $300	$100 to $300
Attorney services (optional)	$500 to $1,500	$500 to $1,500
Accountant services (optional)	$300 to $1,000	$300 to $1,000
Industry-specific license	Varies	Varies

First-Year Cost Estimate

Here's what a typical first-year business formation looks like in Connecticut without professional help:

• LLC formation: $120
• Annual report: $80
• Sales tax permit (if applicable): $100
• Professional registered agent: $150 to $300
• Total: $450 to $600

If you add an attorney ($1,000) and an accountant ($500), that increases to roughly $2,000 to $2,100 in the first year. If your industry requires specialized licensing, add the license fee for your specific field.

This does not include day-to-day operating expenses like office space, equipment, inventory, insurance, or marketing. Those costs are highly variable and depend on your business model.

Where to File and Get Help

All state formation documents and annual reports are filed through Business.CT.gov, the Connecticut Secretary of the State's official online portal. You can also mail paper documents if you prefer, but online filing is faster and accepted automatically.

The Connecticut Secretary of the State's Business Services Division is at https://portal.ct.gov/sots/business-services/bsd. The business search tool is at https://service.ct.gov/business/s/onlinebusinesssearch.

For tax questions, including sales tax registration and ongoing tax obligations, contact the Connecticut Department of Revenue Services at https://portal.ct.gov/drs.

The Connecticut Small Business Development Center (CTSBDC) at https://ctsbdc.uconn.edu/ offers free counseling and guidance to new business owners. The U.S. Small Business Administration also maintains resources for Connecticut at https://www.sba.gov/district/connecticut.

Key Takeaways

Starting a business in Connecticut costs roughly $450 to $600 in the first year for an LLC if you handle everything yourself, counting the state filing, the annual report, a sales tax permit and a registered agent service. Add professional services and you're looking at roughly $2,000 for formation alone. Industry-specific licensing can add hundreds or thousands more. Operating expenses typically exceed filing costs, so plan your total startup budget carefully.

The two biggest variables are whether you hire an attorney and CPA, and whether your industry requires specialized licensing. These decisions should be based on your specific situation and risk tolerance.

Disclaimer

This guide is informational and is not legal, tax, or accounting advice. Startup costs vary based on your specific business structure, industry, and location within Connecticut. Before making any business decisions, consult with a qualified attorney for legal guidance and a CPA or tax professional for tax planning. The fees and requirements in this guide are accurate as of the date of publication but are subject to change. Confirm current fees and requirements with the Connecticut Secretary of the State and the Connecticut Department of Revenue Services before filing.