Connecticut’s electricity market has been deregulated since the late 1990s, allowing companies to shop for supply while local utilities continue to deliver power. Businesses in the state pay some of the highest electricity rates in the nation, so comparing suppliers and locking in a low fixed rate can significantly reduce operating expenses. This page highlights the major utilities serving Connecticut, their service territories and standard service generation rates, and lists the major cities and towns where companies can benefit by choosing competitive electricity suppliers.
Utilities Serving Connecticut
- Eversource – Serves most of Connecticut including Hartford, Stamford, New London, Waterbury and Norwich. Provides the Standard Service rate (Generation Service Charge) of about 11.19 cents per kWh effective January 2025; businesses can either pay this default rate or switch to a supplier to lock in a fixed contract.
- United Illuminating (UI) – Serves the southwestern part of the state, including Bridgeport, Fairfield, New Haven and surrounding towns. The Standard Service GSC rate is around 13.57 cents per kWh in January 2025; companies in UI territory can shop for suppliers and secure a lower per‑kWh rate or custom contract.
ajor Connecticut Cities and Towns
- Hartford – As the state capital and one of Connecticut’s largest cities, Hartford businesses can choose competitive electricity suppliers to reduce costs compared with the utility default rate.
- New Haven – Home to Yale University and a diverse business community; companies can benefit from shopping for electricity supply to lock in lower fixed rates.
- Stamford & Norwalk – These Fairfield County cities have large corporate offices; deregulation allows firms to compare offers and secure lower per‑kilowatt‑hour rates than the utility.
- Bridgeport & Fairfield – Businesses in Bridgeport, Fairfield and nearby coastal towns served by United Illuminating can cut supply costs by switching to a fixed‑rate plan.
- Waterbury & Danbury – Manufacturers and small businesses in central and western Connecticut can shop for suppliers to avoid volatility and fix energy budgets.
- New London & Norwich – Companies in eastern Connecticut, including the seaport cities of New London and Norwich, can use EnergizeCT to compare suppliers and save on electricity.
By comparing electricity suppliers and locking in a competitive fixed rate, companies across Connecticut can manage their energy budgets and lower operating costs. Use EnergizeCT and other comparison tools to review available offers, and consult an energy broker or advisor to select the plan that best matches your business’s usage pattern.