Connecticut electricity rates

Average bill: $206.46
All-in price: 29.31¢
Average use: 704.3 kWh
Customers: 1,581,525

EIA-861 Average Bill, residential, 2025, released October 7, 2026. July 2026 residential price in Table 5.6.A was 24.16¢/kWh. July 2025 was 27.60¢/kWh. Table retrieved October 10, 2026. The table does not state a cause for the change.

Bundled and energy utilities

Utilities with a complete 2025 residential row and at least 10,000 customers. Sorted by the all-in cents per kWh of the primary service row. Delivery-only utilities are in the next section and are not mixed into this ranking.

Utility	Service	¢/kWh	Bill	Customers
Direct Energy Services	Energy only	11.08¢	$85.60	37,918
Constellation NewEnergy, Inc	Energy only	11.86¢	$89.39	107,124
Town Square Energy	Energy only	11.90¢	$101.04	49,819
Town of Wallingford - (CT)	Bundled	17.78¢	$151.51	21,426
Groton Dept of Utilities - (CT)	Bundled	18.05¢	$133.62	12,596
City of Norwich - (CT)	Bundled	23.35¢	$147.77	18,967
Sunrun Inc.	Bundled	28.71¢	$166.18	19,341
Connecticut Light & Power Co	Bundled	28.88¢	$195.35	995,130
United Illuminating Co	Bundled	35.40¢	$182.78	261,151

Lowest in this list: Direct Energy Services at 11.08¢/kWh. Highest: United Illuminating Co at 35.40¢/kWh.

Delivery-only utilities

These cents cover delivery charges reported to EIA. In Texas they are the TDU, not the retail plan.

No delivery-only utility in this state meets the data threshold.

EIA state adjustment

Form EIA-861 includes a balancing row for Connecticut, utility number 99999. The sales file names that row Adjustment 2025. It is not a company, the ownership field is blank, and the service-territory file lists no counties. The energy only figure on that row is 11.74¢/kWh, $296.96 a month, at 2,529.7 kWh, across 10,424 customers. Read the adjustment row.

Other utilities (29)

These utilities stay linked from this page. Most serve fewer than 10,000 residential customers, or the 2025 file is missing a price, a bill, a usage figure, or enough history.