NSTAR Electric Company Electricity Rates and Average Bill (Massachusetts)
Data through July 2026 (the latest month EIA has published) · Updated October 13, 2026
As of July 2026, NSTAR Electric Company's residential customers in Massachusetts paid an average effective rate of 20.10¢/kWh with an average monthly bill of $118.25, per EIA Form 861-M data. That rate is 10.4¢ below the Massachusetts average of 30.49¢/kWh; the U.S. average is 18.31¢/kWh.
Rate trend vs the Massachusetts average
View this chart as a table (last 12 months)
| Month | Rate (¢/kWh) | Avg bill ($/mo) | Avg usage (kWh/mo) |
|---|---|---|---|
| August 2025 | 19.66 | 119.02 | 606 |
| September 2025 | 20.47 | 94.95 | 464 |
| October 2025 | 20.58 | 79.17 | 385 |
| November 2025 | 19.90 | 81.41 | 409 |
| December 2025 | 20.23 | 106.74 | 528 |
| January 2026 | 20.12 | 122.38 | 608 |
| February 2026 | 18.31 | 113.08 | 618 |
| March 2026 | 17.59 | 91.74 | 522 |
| April 2026 | 19.09 | 80.17 | 420 |
| May 2026 | 18.55 | 77.35 | 417 |
| June 2026 | 20.58 | 88.45 | 430 |
| July 2026 | 20.10 | 118.25 | 588 |
NSTAR Electric Company vs Massachusetts vs the U.S.
| NSTAR Electric Company | Massachusetts | U.S. average | |
|---|---|---|---|
| Rate (July 2026) | 20.10¢/kWh | 30.49¢/kWh | 18.31¢/kWh |
| Average monthly bill | $118.25 | $224.86 | $212.44 |
| Average monthly usage | 588 kWh | 738 kWh | 1160 kWh |
| Rate change, 1 year | +5.5% | +1.4% | +4.9% |
Estimate a bill at NSTAR Electric Company rates
Worked example: 1,000 kWh at NSTAR Electric Company's average effective rate of 20.10¢/kWh is about $201.00. The utility's actual average usage is 588 kWh/month, which produces the $118.25 average bill. This is an all-in average (energy, delivery, fixed charges, riders); your tariff's marginal price will differ.
See the full Massachusetts rate trend, look up another utility by ZIP code, or read why electric bills are rising.
Source: EIA Form 861-M (monthly utility-level sales to ultimate customers, residential), published with roughly a two-month lag. Rate = revenue ÷ sales; bill = revenue ÷ customers. Months failing basic sanity screens are excluded. See methodology.