Residential rates by utility (EIA-861, average all-in ¢/kWh)
| Utility | 2023 ¢/kWh | 2024 ¢/kWh | Customers (2024) | Ownership | vs state avg, $/yr |
|---|---|---|---|---|---|
| Town of Wallingford | 16.73 | 15.65 | 21,405 | Municipal | -$1,405 |
| Groton Dept of Utilities | 20.07 | 18.70 | 12,284 | Municipal | -$1,075 |
| City of Norwich | 25.45 | 22.78 | 18,870 | Municipal | -$635 |
| Eversource (Connecticut Light & Power) | 31.63 | 28.51 | 924,132 | Investor-owned | -$16 |
| United Illuminating Co | 33.16 | 34.04 | 256,302 | Investor-owned | +$581 |
Average price = residential revenue ÷ residential sales from each utility's federal EIA-861 filing (bundled service — supply + delivery + riders, not a quoted tariff rate). State average = 28.66¢/kWh, volume-weighted across these utilities (2024). Your distribution utility is fixed by address; these gaps measure what households in different territories actually paid. A further 16 competitive suppliers / solar lessors report energy-only or behind-the-meter sales in Connecticut; their prices cover only part of the bill and are not comparable to the all-in figures above.
Can you choose your electric company in Connecticut?
Electric supply choice: yes · Gas supply choice: no
Electric choice statewide (Eversource/UI; PURA Rate Board publishes supplier offers vs standard service). No residential gas choice.
How to switch suppliers in Connecticut (3 steps)
- Find the price to compare (default supply rate) on your utility bill — you only save when an offer beats it for the same period.
- Compare licensed supplier offers on the state's official shopping site: energizect.com/rate-board. Check term, early-exit fees, and whether the rate is fixed or variable.
- Sign up with the supplier — they handle the switch. Your utility still delivers the power, owns the wires, and responds to outages; only the supply line of the bill changes.
Heating: which fuel is cheapest per million BTU in Connecticut?
| Fuel | Native price | As of | $ per MMBTU |
|---|---|---|---|
| Utility natural gas | $1.702 /therm | Feb 2026 | 17.02 |
| Heating oil (No. 2) | $5.546 /gal | Mar 30, 2026 | 40.04 |
| Propane | $4.116 /gal | Mar 30, 2026 | 45.01 |
| Electricity (resistance) | 30.77 ¢/kWh | Feb 2026 | 90.18 |
Utility natural gas is the cheapest heating fuel in Connecticut at $17.02/MMBTU — heating oil costs 2.4× as much per BTU. Conversions: 1 kWh = 3,412 BTU; 1 therm = 100,000 BTU; heating oil 138,500 BTU/gal; propane 91,452 BTU/gal. Site-energy prices — appliance efficiency changes delivered-heat cost: a 95% AFUE gas furnace delivers heat near the gas figure, while a heat pump at seasonal COP 2.5–3 cuts the effective electric figure by 60–70%.
Electricity price trend, last 12 months
Connecticut's average residential price went from 33.20¢/kWh in Feb '25 to 30.77¢/kWh in Feb '26 — down 7% year-over-year. The 12-month peak was 33.20¢ in Feb '25.
| Month | Feb '25 | Mar '25 | Apr '25 | May '25 | Jun '25 | Jul '25 | Aug '25 | Sep '25 | Oct '25 | Nov '25 | Dec '25 | Jan '26 | Feb '26 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ¢/kWh | 33.20 | 32.50 | 32.23 | 31.59 | 27.19 | 27.60 | 30.24 | 30.48 | 27.72 | 27.02 | 25.30 | 28.30 | 30.77 |
Head-to-head utility comparisons in Connecticut
- Eversource (Connecticut Light & Power) vs United Illuminating Co — who's cheaper?
Questions people ask
- Who has the cheapest electricity in Connecticut?
- Eversource (Connecticut Light & Power), at an average 28.5 cents per kWh for 2024 among Connecticut utilities with at least 50,000 customers (EIA-861). The most expensive, United Illuminating Co, averaged 34.0 cents — a difference of about $598 per year at 10,800 kWh.
- Can I choose my electric company in Connecticut?
- You cannot choose the utility that delivers power — that is set by your address. Connecticut does allow residential supply choice: you may buy the supply portion from a licensed competitive supplier if it beats your utility's price to compare. The official shopping site is energizect.com/rate-board.
- Is gas or electric heat cheaper in Connecticut?
- Per million BTU of site energy, utility natural gas was $17.02 (Feb 2026) versus $90.18 for electric resistance heat, $40.04 for heating oil. A heat pump delivering 2.5-3 units of heat per unit of electricity brings electric heating to roughly $30-36 per MMBTU.
- What is the average electric bill in Connecticut?
- At Connecticut's February 2026 average price of 30.77 cents/kWh and typical usage of 900 kWh per month, a household pays about $277 per month ($3323 per year) for electricity. Actual bills vary with usage, utility territory, and tariff.