Business Licenses & Permits in Connecticut: What You Actually Need
Licensing requirements are less complicated than they seem — once you know what applies to your business.
One of the most common questions new business owners ask is: what licenses and permits do I actually need? The answer depends on your industry, location, and business activities — but this guide covers the most common requirements for Connecticut businesses and where to go to get them.
State-Level Registration & Tax Permits
Every business operating in Connecticut must register with the Connecticut Department of Revenue Services (DRS) if it collects sales tax, has employees, or earns income in the state. Register at portal.ct.gov/DRS — you'll receive a Connecticut Tax Registration Number, which you'll use for filing sales tax returns and employer withholding.
If you sell taxable goods or services, you must collect Connecticut sales tax (currently 6.35%) and remit it to the DRS. Most services are not taxable in Connecticut, but goods, prepared food, and certain digital products are. When in doubt, check the DRS website or consult a CPA.
Connecticut also requires businesses with employees to register for unemployment insurance with the Department of Labor and workers' compensation insurance through a licensed carrier. Both are mandatory from the first day you hire.
Local Permits & Zoning
Most Connecticut towns require a local business license or certificate of occupancy for businesses operating from a physical location. Contact your town's Building Department and Zoning Office before signing a lease — zoning restrictions can prevent certain business types from operating in specific areas.
Home-based businesses face additional scrutiny in many Fairfield County towns. Westport, Greenwich, and Darien have specific zoning regulations about signage, customer visits, and employee presence at home offices. Review your town's zoning regulations carefully.
Food businesses require health department permits from your local health district. In Fairfield County, this is typically the Westport-Weston Health District, Darien Health Department, or similar local authority. Inspections are required before opening and periodically thereafter.
Professional & Industry-Specific Licenses
Many professions in Connecticut require a state license — contractors, electricians, plumbers, real estate agents, insurance agents, financial advisors, healthcare providers, and many others. Check the Connecticut Department of Consumer Protection (ct.gov/dcp) for a complete list of licensed professions.
Home improvement contractors must register with the DCP and carry a minimum of $500,000 in general liability insurance. This is strictly enforced — operating without registration can result in fines and inability to collect payment through the courts.
Liquor licenses in Connecticut are issued by the Department of Consumer Protection and are notoriously difficult to obtain — the process takes 3–6 months and requires local approval. If your business involves alcohol, start the licensing process well before your planned opening date.
Local Tips
- Register with CT DRS at portal.ct.gov before your first sale — penalties for late registration add up
- Check zoning before signing a lease — some business types are prohibited in certain zones
- Home improvement contractors must register with ct.gov/dcp — it's the law
- Liquor license applications take 3–6 months — start early
- The CT Business One Stop portal (business.ct.gov) is the best starting point for all state registrations
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