Current Average Electricity Supply Rate in Connecticut
As of September 2025, the average residential electricity price in Connecticut is 30.48¢ per kWh. This figure represents the typical all-in rate customers pay for electricity supply and delivery and serves as a useful indicator of supply costs in the state.
Recent Rate Trends
- June 2025: 29.6¢/kWh
- July 2025: 29.9¢/kWh
- August 2025: 30.2¢/kWh
Projected Rate Trends
- October 2025: 30.8¢/kWh
- November 2025: 31.1¢/kWh
- December 2025: 31.4¢/kWh
Where Connecticut rates are today
Connecticut sits near the top of the U.S. for electricity costs. With an average residential price around 30.5¢/kWh, CT customers pay roughly 70% more than the national average of 18.07¢/kWh. High delivery charges, regional capacity constraints in New England, and heavy reliance on natural gas‑fired generation all keep prices elevated.
Why Connecticut rates have been where they are
- New England grid constraints – ISO‑NE operates a tight, transmission‑constrained system with limited low‑cost local generation, pushing up wholesale prices.
- Natural gas price exposure – Much of CT’s electricity is tied to gas‑fired plants, so spikes in gas feed directly into power prices.
- High transmission & distribution costs – Aging infrastructure and storm‑hardening investments raise delivery charges.
- Default supply resets – When the utility standard‑service rate is reset, it can jump sharply depending on wholesale contracts, and retail suppliers generally track that trend.
Where Connecticut rates are going in the next 3 months
For winter 2025‑26, energy authorities expect electric heating bills to rise around 4%, driven mostly by higher electricity prices rather than usage. For Connecticut, that likely means a modest upward drift (1–3%) in average cents/kWh into winter. Spikes during cold snaps are possible if regional gas demand surges. Some retail suppliers may offer fixed-rate plans that hedge winter prices, but the general trend remains slightly up, not down.
Key takeaway for businesses: Connecticut is a “lock earlier rather than later” state going into winter. Buying when wholesale costs are relatively calm and before peak winter
Key Indicators Affecting Connecticut Electricity Rates
Natural gas prices: Connecticut’s grid depends heavily on natural-gas‑fired power plants. When gas prices rise, wholesale electricity prices follow because gas plants often set the market‑clearing price.
Pipeline constraints and LNG imports: Limited pipeline capacity into New England means utilities sometimes import liquefied natural gas at higher prices during peak demand. These bottlenecks drive up fuel costs and retail supply rates.
Wholesale market rules: ISO New England uses a marginal pricing system where the price is set by the most expensive unit needed to meet demand, usually a natural‑gas plant. As a result, spikes in gas prices quickly translate into higher electric rates.
Weather and demand: Harsh winters and hot summers increase demand for heating and cooling, pushing up spot prices and supply rates.
Policy and infrastructure costs: Renewable portfolio standards, efficiency programs and investments in transmission and storm‑hardening add fees and surcharges that appear on customer bills.
By tracking these indicators, businesses can anticipate when rates may rise or fall. For example, rising natural gas futures or forecasts of cold weather often signal higher supply offers, while mild weather and low gas prices may present opportunities to secure lower rates.