How to Start a Business in Connecticut

Insurance and Financial Services Hartford is the historic insurance capital of the world, home to Aetna, The Hartford, and Cigna. The sector employs over 100,000 people statewide.

Healthcare and Bioscience Connecticut's biotech corridor stretches from New Haven to Stamford, anchored by Yale New Haven Health and numerous pharmaceutical firms. The sector is growing at roughly 4% annually.

Advanced Manufacturing and Aerospace Pratt & Whitney and Sikorsky are headquartered here, supporting a deep supply chain of precision manufacturers. Defense contracts drive billions in annual revenue.

Technology and Software Stamford and Hartford have emerging tech hubs, with growing demand for SaaS, fintech, and cybersecurity companies. Venture capital flowing into the state has increased over the past several years.

Professional and Business Services Consulting, legal, accounting, and management firms thrive on the state's dense corporate client base. This sector accounts for a significant share of Connecticut's GDP.

Tourism and Hospitality Connecticut's shoreline, casinos (Foxwoods, Mohegan Sun), and fall foliage drive a $9+ billion tourism industry annually. Seasonal businesses in this sector can be highly profitable.

Connecticut's personal income tax has seven brackets ranging from 3% to 6.99%. Most small business owners with LLC pass-through income will fall somewhere in the middle brackets, depending on total household income.

The state sales tax rate is 6.35%, applied to most tangible personal property and certain services. Some items like groceries and prescription drugs are exempt.

Corporations pay a 7.5% corporate income tax or a $250 minimum franchise tax, whichever is greater. LLCs structured as pass-through entities do not owe the corporate tax or the franchise tax.

Connecticut offers a Pass-Through Entity Tax (PET) election that allows LLC members and S-Corp shareholders to pay state income tax at the entity level. This effectively works around the federal $10,000 SALT deduction cap and can save high-income owners thousands per year.

Employers must withhold Connecticut income tax from employee wages and remit it to the Department of Revenue Services. Unemployment insurance tax rates for new employers start at approximately 3.0% on the first $15,000 of each employee's wages.

Property taxes are assessed locally with no statewide cap, and Connecticut towns have some of the highest mill rates in the nation. Budget 1.5% to 3% of assessed property value annually if you own commercial real estate.

Connecticut's cost of living index is approximately 111 (vs. 100 national average), driven primarily by housing and property taxes. Fairfield County (near NYC) skews the average significantly higher than the rest of the state.

Average commercial rent in Hartford runs $18 to $24 per square foot annually, while Stamford and the Fairfield County corridor can exceed $40 per square foot. Many startups reduce overhead by starting in smaller cities like New Haven, Middletown, or Waterbury.

Connecticut's minimum wage is $16.35 per hour as of 2026, well above the federal rate of $7.25. Factor this into labor costs when building your financial projections, especially for service-based or retail businesses.

Utility costs are above the national average, with commercial electricity rates roughly 20% higher than the U.S. median. Energy-intensive businesses should explore Connecticut's commercial energy efficiency programs for rebates.

The Connecticut Small Business Development Center (CTSBDC) offers free business advising, financial planning assistance, and help preparing SBA loan applications. Their advisors work one-on-one with founders across every stage.

The SBA Connecticut District Office in Hartford connects you with SBA-backed lenders offering 7(a) loans, microloans (up to $50,000), and 504 loans for real estate and equipment. Interest rates are typically lower than conventional bank loans.

The Connecticut Department of Economic and Community Development (DECD) administers several grant and loan programs, including the Small Business Express Program, which has provided over $300 million in loans and grants to Connecticut businesses since its inception. Eligible businesses can receive up to $100,000 in revolving loans or matching grants.

Connecticut Innovations (CI) is the state's venture capital arm, investing in early-stage technology and life sciences companies. CI has deployed over $600 million in funding across hundreds of startups.

In your first 30 days, open a business bank account, register for Connecticut tax accounts at the DRS, and obtain any required local permits. If you are hiring immediately, register with the Connecticut Department of Labor for unemployment insurance and workers' comp before your first employee's start date.

Between days 30 and 60, set up accounting software, establish your bookkeeping system, and secure business insurance. Make your first quarterly estimated tax payment by the next IRS/state deadline (April 15, June 15, September 15, or January 15).

By day 90, your Google Business Profile should be live, your website should be indexed, and your compliance calendar should have reminders for your first Connecticut annual report (due January 1 through March 31 of the following year). Use Geekdiys's compliance calendar to automate every deadline.