Connecticut has a fully deregulated electricity and natural gas market with some of the highest electricity rates in the continental United States. Eversource Energy (serving most of the state) and United Illuminating (serving the New Haven and Bridgeport areas) are the two electric distribution utilities. Connecticut deregulated energy shopping through licensed competitive suppliers regulated by the Public Utilities Regulatory Authority (PURA) gives residents a real opportunity to reduce their per-kWh supply rate and save meaningfully on their monthly bills.

Connecticut Energy Deregulation: Utility Territories

Eversource Energy Territory (Most of Connecticut)

Eversource Energy serves Hartford, Stamford, New Britain, Waterbury, Danbury, Norwich, and the majority of Connecticut. Their default Standard Service rate changes quarterly and is your baseline for evaluating competitive supplier offers. CT Eversource customers consistently face some of the highest electricity costs in the state.

United Illuminating Territory (New Haven and Bridgeport)

United Illuminating (now part of Avangrid) serves New Haven, Bridgeport, Milford, West Haven, and surrounding southwestern coastal communities. UI customers can shop licensed competitive suppliers for electricity supply just like Eversource customers. UI rates are similarly high, making competitive supplier shopping particularly valuable in this territory.

Connecticut Natural Gas and Southern Connecticut Gas

Connecticut is also deregulated for natural gas through Connecticut Natural Gas (CNG), Southern Connecticut Gas (SCG), and Berkshire Gas. If you heat with natural gas, shopping for a fixed-rate gas supplier before winter is a high-value step — especially in Connecticut where heating bills can be substantial during New England winters.

How to Switch Energy Suppliers in Connecticut

  1. Identify your utility territory — Check your bill to confirm which utility delivers your electricity and gas.
  2. Find the current default supply rate — Check your utility website or your state public utility commission for the current default supply rate in your territory.
  3. Compare licensed supplier offers — Use Utility Search Marketplace to see current fixed-rate offers from licensed suppliers in your territory side by side.
  4. Review contract terms carefully — Confirm the rate per kWh, contract length, early termination fee, and that the rate is fixed for the full term.
  5. Enroll online in under 10 minutes — You will need your utility account number. No service interruption occurs during the switch process.
  6. Re-shop at contract expiration — Set a reminder 60 days before your contract ends to compare rates before auto-renewal.

Internet Providers in Connecticut

Xfinity (Comcast) is the dominant cable internet provider across most of Connecticut with wide availability statewide. Frontier Fiber is one of the most exciting ISPs expanding in Connecticut in 2026 — Frontier has been actively building fiber infrastructure across the state, particularly in Hartford and New Haven areas, offering competitive gigabit pricing as a strong alternative to Xfinity. Optimum (Altice) provides coverage in southwestern Connecticut (Stamford, Greenwich, Norwalk, and Fairfield County) and competes directly with Xfinity in that corridor. T-Mobile Home Internet provides a no-contract 5G option growing across Connecticut.

Home Security in Connecticut: Vivint and ADT

Vivint and ADT both serve Connecticut. In a state with electricity rates consistently among the highest in the country, the Vivint smart thermostat provides an especially powerful energy management tool — reducing consumption automatically while a competitive supplier reduces your cost per kWh. The compounded effect on your annual bill in Connecticut can be substantial given the state’s high baseline rates.

Connecticut Bundle Savings Estimate

  • ⚡ Electricity: $20–$50/month electricity (CT among highest US rates)
  • 🔥 Natural gas: $15–$30/month gas
  • 🌐 Internet: $20–$40/month internet (Frontier Fiber vs Xfinity)
  • 🔐 Home security: $10–$25/month security

Frequently Asked Questions: Connecticut Deregulated Energy

What is the Standard Service rate in Connecticut?

The Standard Service rate is the default supply rate set by Eversource or United Illuminating quarterly. It represents the price you are paying if you have not chosen a competitive supplier. PURA publishes the current Standard Service rates at ct.gov/pura. Any licensed supplier offering below this rate saves you money on the supply portion of your bill.

Is there a cancellation fee for switching electricity suppliers in Connecticut?

It depends on your current supplier contract. If you are on your utility’s Standard Service (the default), there is no cancellation fee to switch to a competitive supplier. If you are mid-contract with a competitive supplier, your contract terms will specify any early termination fee. Always read the full contract before enrolling.

How long does switching take in Connecticut?

Enrollment takes under 10 minutes online. The switch processes through your utility within 1–2 billing cycles. Your service is never interrupted — only the supply charge on your bill changes.

Related Connecticut Energy and Internet Guides

📖 Internet Choice in Deregulated Energy States: Complete Bundling Guide

📖 How to Compare Energy Plans and Save Money in 2026

👉 Compare Connecticut deregulated energy, internet, and home services at Utility Search Marketplace