NSTAR Electric Company (Massachusetts): residential electricity prices and bills
NSTAR Electric Company, an investor-owned utility in Massachusetts, served 306,795 full-service residential customers in 2025. They paid an average of 21.49 cents per kilowatt-hour, and the average monthly bill was $102 for 474 kWh a month. Across all full-service residential customers of the Massachusetts utilities listed here, the 2025 average was 24.69 cents and $135 a month. In 2024 its price was 29.91 cents (-28.2%) and the average bill $137.
Residential figures, 2025
| Service | Customers | Price (cents/kWh) | Avg monthly bill | Avg monthly kWh | 2024 price |
|---|---|---|---|---|---|
| Full service (bundled) | 306,795 | 21.49 | $102 | 474 | 29.91 |
| Delivery only | 968,061 | 20.06 | $115 | 571 | 16.27 |
Delivery-only figures cover only the utility's delivery charges. Those homes also pay a separate supplier for the electricity itself.
Power outages, 2025
Reported to EIA under the IEEE 1366 standard. Major event days are days with unusually severe outages, usually storms.
Counties served
Barnstable, Berkshire, Bristol, Dukes, Franklin, Hampden, Hampshire, Middlesex, Norfolk, Plymouth, Suffolk.
Counties where the utility reports having customers. It may serve only part of each county.
If your bill is hard to pay
The federal Low Income Home Energy Assistance Program (LIHEAP) helps with heating and cooling bills. Find your state office on the LIHEAP page. Your state utility commission handles complaints about utility billing and rates.
Sources
- US Energy Information Administration, Annual Electric Power Industry Report, Form EIA-861, 2025 and 2024 detailed data (Sales to Ultimate Customers, Reliability, Service Territory, Average Bill)
Checked 29 October 2026. These are each utility's 2025 averages across its whole service area, as reported to EIA. Your own rate and bill depend on your rate plan and use.