NSTAR Electric Company electricity rates in Massachusetts, 2025
NSTAR Electric Company’s 306,795 residential customers paid an average of 21.49¢ per kWh in 2025, 29% below the Massachusetts average of 30.41¢. The typical home used 474 kWh a month, for an average bill of $102.
- 21.49¢avg ¢/kWh (2025)−8.42¢ (-28.2%) vs 2024
- $102Avg monthly billMassachusetts: $181
- 474 kWhAvg monthly useMassachusetts: 596 kWh
- 306,795Residential customersFull-service utility
| Sector | Customers | Sales (MWh) | Revenue | ¢/kWh 2025 | ¢/kWh 2024 | Change |
|---|---|---|---|---|---|---|
| Residential | 306,795 | 1,744,885 | $374,987,000 | 21.49¢ | 29.91¢ | −8.42¢ (-28.2%) |
| Commercial | 33,547 | 803,411 | $142,135,000 | 17.69¢ | 27.00¢ | −9.31¢ (-34.5%) |
| Industrial | 298 | 50,107 | $11,591,000 | 23.13¢ | 25.34¢ | −2.21¢ (-8.7%) |
| All sectors | 340,640 | 2,598,403 | $528,713,000 | 20.35¢ | 29.02¢ | −8.67¢ (-29.9%) |
How NSTAR Electric Company compares
- Massachusetts residential average, 2025: 30.41¢ per kWh, 596 kWh a month, $181 average bill. U.S. average: 17.23¢, 874 kWh, $151.
- Among 20 full-service utilities in Massachusetts with at least 1,000 residential customers, NSTAR Electric Company ranks 17 of 20 from lowest to highest average price.
- Latest monthly figure: Massachusetts homes paid 30.48¢ per kWh in August 2026 (preliminary), against 30.55¢ in August 2025. Summer months often run higher than the annual average.
- From 2024 to 2025 this average fell 28.2%; the state average rose 3.6%.
- Another 968,061 residential customers buy supply from a competitive supplier and pay NSTAR Electric Company only for delivery, averaging 20.06¢ per kWh for that service.
- NSTAR Electric Company is an investor-owned utility, a private company whose rates are set by the state utility commission. Balancing authority: ISNE.
Where NSTAR Electric Company serves
EIA lists 11 Massachusetts counties in its 2025 service territory: Barnstable, Berkshire, Bristol, Dukes, Franklin, Hampden, Hampshire, Middlesex, Norfolk, Plymouth, Suffolk.
289 ZIP codes are matched to NSTAR Electric Company in NREL’s 2024 ZIP file: 01460, 01568, 01581, 01701, 01702, 01703, 01704, 01705, 01718, 01719, 01720, 01721, 01730, 01731, 01741, 01742, 01745, 01746, 01748, 01749, 01752, 01754, 01757, 01760, 01770, 01772, 01773, 01775, 01776, 01778, 01784, 01801, 01803, 01805, 01813, 01815, 01821, 01824, 01862, 01867, 01876, 01880, 01886, 01887, 01888, 01890, 02019, 02020, 02021, 02026, 02027, 02030, 02032, 02035, 02038, 02041, 02050, 02051, 02052, 02053, and 229 more. Utility boundaries do not follow ZIP lines, so a ZIP can have more than one provider.
Massachusetts full-service utilities with similar rates
| Provider | ¢/kWh | Avg bill | Customers |
|---|---|---|---|
| City of Chicopee (MA) | 16.21¢ | $118 | 23,231 |
| City of Holyoke (MA) | 16.36¢ | $101 | 15,155 |
| Town of Danvers | 16.55¢ | $116 | 11,677 |
| City of Peabody (MA) | 16.88¢ | $121 | 22,697 |
| City of Norwood (MA) | 17.61¢ | $98 | 13,617 |
| City of Westfield (MA) | 18.46¢ | $125 | 16,386 |
| City of Taunton (MA) | 18.81¢ | $130 | 34,952 |
| Town of Reading (MA) | 19.95¢ | $165 | 26,573 |
Sources
- U.S. Energy Information Administration, Annual Electric Power Industry Report, Form EIA-861, 2025 final data (f8612025.zip, file dated October 7, 2026): Sales to Ultimate Customers, Average Monthly Bill and Service Territory tables.
- EIA Form EIA-861, 2024 final data (f8612024.zip, file dated December 4, 2025), for the 2024 comparison.
- EIA Electric Power Monthly, Table 5.6.A (average price by state, August 2026 and August 2025; 2026 values are preliminary), file dated October 22, 2026.
- National Renewable Energy Laboratory via OpenEI, U.S. Electric Utility Companies and Rates: Look-up by Zipcode (2024) (investor-owned and other utilities, files dated November 10, 2025), used only to match ZIP codes to utilities.
Average price = residential revenue ÷ residential kWh sold, as reported to EIA. It includes fixed monthly charges, taxes passed through in revenue and seasonal tiers, averaged over the year. Your own rate depends on your tariff and usage.
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