Running a Business in Connecticut: Operations, Taxes & Compliance

Set up accounting software from day one — QuickBooks Online and Xero are the two most common choices for small businesses. Both integrate with your bank accounts, automate expense categorization, and generate the financial reports you'll need for taxes and business decisions. The cost ($30–$70/month) is trivial compared to the time and errors it saves.

Connecticut businesses must file and pay state business taxes, including the Connecticut Business Entity Tax ($250/year for LLCs and S-Corps) and, if you have employees, Connecticut withholding tax. Sales tax (6.35%) applies to most retail sales of goods and some services — register for a Sales and Use Tax permit through the Connecticut Department of Revenue Services (portal.ct.gov/DRS) before making your first taxable sale.

Hire a CPA or bookkeeper early — even part-time. The cost of professional accounting is almost always less than the cost of fixing mistakes, and a good accountant will find deductions and strategies that more than pay for their fee. In Fairfield County, there are excellent local CPAs who specialize in small business — many offer free initial consultations.

General Liability Insurance is the baseline for almost every business — it covers bodily injury and property damage claims from customers or third parties. Most commercial leases require it, and many clients will ask for a certificate of insurance before signing a contract. Expect to pay $500–$2,000/year depending on your industry and revenue.

Professional Liability Insurance (also called Errors & Omissions or E&O) is essential for service businesses — consultants, accountants, lawyers, designers, IT professionals, and anyone who gives advice or provides professional services. It covers claims that your work caused financial harm to a client. If you're in a professional services field, this is non-negotiable.

If you have employees, Connecticut requires Workers' Compensation Insurance — no exceptions. The penalty for operating without it is significant. You'll also need to consider health insurance (Connecticut has a state exchange, Access Health CT), and if you want to attract and retain good employees, offering health benefits is increasingly expected even at small companies.

Connecticut LLCs must file an Annual Report with the Secretary of State by March 31 each year. The fee is $80 for LLCs and $150 for corporations. Missing this deadline results in late fees and, eventually, administrative dissolution of your business entity — which creates significant legal and tax complications. Set a calendar reminder.

If your business collects sales tax, you must file Sales and Use Tax returns on a monthly, quarterly, or annual basis depending on your volume. The Connecticut DRS will assign your filing frequency when you register. Late filing and payment result in penalties and interest — automate this if at all possible.

Employment law compliance is a significant ongoing obligation for businesses with employees. Connecticut has strong worker protections — paid sick leave requirements, strict rules on tip pooling, mandatory break requirements, and robust anti-discrimination laws. The Connecticut Department of Labor website (ct.gov/dol) is the authoritative source; consider an employment attorney consultation when you make your first hire.