Editor: Katerine G., Editor & Data Researcher · Research & publishing: Electric Consumer Editorial Team · Data retrieved · Sources named on this page: EIA-861, EIA retail sales · How we got these numbers · Report an error
In Massachusetts, NSTAR Electric Company bills 1,526,558 accounts, 85.4% residential, as an investor owned utility. Among the 3 Eversource utilities listed here it is number 2 on price for homes, +0.00 ¢ from their median.
NSTAR Electric Company: 504 kWh a month costs roughly $100 in energy at 19.92 ¢/kWh, -32.1% on the Massachusetts average of 29.35 ¢.
Among the 3 Eversource utilities listed here it is number 2 on price for homes, +0.00 ¢ from their median.
Take the 3 Eversource utilities listed here, sorted by home price: NSTAR Electric Company is number 2 of 3 at 19.92 ¢, while the group median is 19.92 ¢. The cheapest is Public Service Co of NH (NH) at 18.74 ¢, +1.18 ¢ from here; the most expensive is Connecticut Light & Power Co (CT), 5.39 ¢ above.
On outage minutes it ranks 1 of 3 (1 = fewest), 66 against a group median of 77. It is the largest of them, 1,526,558 accounts, 1.2 times Connecticut Light & Power Co.
| NSTAR Electric Company, 2024 | Home | Business | Bill | SAIDI |
|---|---|---|---|---|
| NSTAR Electric CompanyLowest in this table | 19.92 ¢/kWh | 9.78 ¢/kWh | $100at 504 kWh | 66 minSAIDI |
| Massachusetts average against this company, which is 4 of 7 on price | +9.43 ¢/kWhcompany 32.1% below | +11.12 ¢/kWhcompany 53.2% below | +$47a month at 504 kWh | -18 mincompany 18 above |
| City of Taunton | 21.46 ¢/kWhcompany 7.2% below | 22.62 ¢/kWhcompany 56.8% below | $1088 more than company | 193 mincompany 127 below |
Compare 20 Massachusetts companies
No 2025 early-release row for NSTAR Electric Company; 2024 stays the latest year.
NSTAR Electric Company has no 2025 early-release row; for its 1,303,076 home accounts the latest year is 2024, at 19.92 ¢/kWh and 66 SAIDI minutes.
NSTAR Electric Company serves 1,303,076 homes in Massachusetts. At 504 kWh a month that is about 188 kg of CO₂, or 2,254 kg a year, at the Massachusetts plant rate, state generation and not this utility: Massachusetts generation mix.
17.69 ¢ in 2015, 19.92 ¢ in 2024 (+12.6%); Massachusetts 19.83 to 29.35 ¢.
| Year | NSTAR Electric Company | Gap to Massachusetts residential | Gap to U.S. residential |
|---|---|---|---|
| 2015 | 17.69 | -2.14 | +5.04 |
| 2016 | 16.66 | -2.34 | +4.11 |
| 2017 | 16.45 | -3.61 | +3.56 |
| 2018 | 16.91 | -4.70 | +4.04 |
| 2019 | 16.88 | -5.04 | +3.87 |
| 2020 | 16.37 | -5.60 | +3.22 |
| 2021 | 16.56 | -6.33 | +2.90 |
| 2022 | 20.18 | -5.79 | +5.14 |
| 2023 | 21.74 | -7.87 | +5.74 |
| 2024 | 19.92 | -9.43 | +3.44 |
10 rows from EIA retail sales.
CSV75 min in 2015, 66 in 2024.
| Year | NSTAR Electric Company, no major events |
|---|---|
| 2015 | 75 |
| 2016 | 98 |
| 2017 | 74 |
| 2018 | 85 |
| 2019 | 70 |
| 2020 | 65 |
| 2021 | 76 |
| 2022 | 68 |
| 2023 | 76 |
| 2024 | 66 |
10 rows from EIA-861 survey.
CSV66.1 min, 0.66x the median reporter, rank 222 of 673.
NSTAR Electric Company, Reliability: EIA-861 survey.
CSVFrom 17.69 ¢ in 2015 to 19.92 ¢ in 2024, a move of +12.6%: NSTAR Electric Company lagged its state (+48.0%) by 35.4 points, and -17.7 points against the U.S. Full-service customers alone pay 29.91 ¢ per EIA, against 19.92 ¢ for all rows: buyers of energy elsewhere pay NSTAR Electric Company for delivery only. NSTAR Electric Company's sharpest move came in 2022, +21.9%. The high is 21.74 ¢ (2023) and the low 16.37 ¢ (2020). 2024: -8.4% here, -0.9% for the Massachusetts average. SAIDI at NSTAR Electric Company (major events excluded) went from 75 minutes in 2015 to 66 in 2024, -12%, between 65 (2020) and 98 (2016). NSTAR Electric Company filed SAIDI under the national median in 10 of 10 years; its 2024 figure was 66 minutes, -33 from that year's median. 2018: 970 minutes with major events, 85 without, the widest gap of any year. NSTAR Electric Company has 3 cheaper and 3 higher-priced Massachusetts peers among 7 with 20,000+ homes. Next cheaper, City of Chicopee, bills 16.16 ¢ (-3.76). Next higher-priced, City of Taunton, bills 21.46 ¢ (+1.54).
Two good signs together. Rates are 32.1% below Massachusetts and outage time of 66 minutes beats the national median by 34%.
Home accounts at NSTAR Electric Company went from 1,063,565 in 2015 to 1,303,076 in 2024, +22.5%. Business customers paid 0.49 times the home price in 2024 (9.79 against 19.92 ¢); the ratio was 0.49 in 2015. SAIFI went from 0.76 in 2015 to 0.64 in 2024, between 0.07 and 0.91.
Yearly SAIDI at NSTAR Electric Company: 82 minutes in 2013, 66 in 2024, a drop of 19%. The low came in 2020 at 65, the high in 2016 at 98; 12 years were filed. The Massachusetts median in 2024 was 48 minutes, so NSTAR Electric Company ran above it.
Home rates at NSTAR Electric Company went from 15.65 ¢ in 2013 to 19.92 ¢ in 2024 (+27.3%), which is 21.63 ¢ to 20.45 ¢ in 2025 dollars (−5.5%). Over 12,000 kWh a year the real price meant $2,596 in 2013 and $2,454 in 2024. Of 27 Massachusetts utilities with 1,000+ home accounts in 2024, NSTAR Electric Company stood 19th cheapest (29th of 31 in 2013).
NSTAR Electric Company at 66 min in 2024 and the Massachusetts median at 48.
NSTAR Electric Company: 20.45 ¢ in 2025 dollars (solid) and 19.92 ¢ as billed (dashed) in 2024.
| Year, NSTAR Electric Com | ¢ billed | ¢ in 2025 $ | Price place, NSTAR Electric | SAIDI min | SAIFI | SAIDI place, NSTAR Electric | Massachusetts median SAIDI |
|---|---|---|---|---|---|---|---|
| 2013 | 15.65 | 21.63 | 29 of 31 | 82 | 0.85 | 6 of 9 | 55 |
| 2014 | 16.68 | 22.68 | 30 of 33 | 67 | 0.66 | 5 of 8 | 65 |
| 2015 | 17.69 | 24.03 | 31 of 33 | 75 | 0.76 | 6 of 6 | 38 |
| 2016 | 16.66 | 22.35 | 32 of 35 | 98 | 0.91 | 8 of 8 | 24 |
| 2017 | 16.45 | 21.60 | 32 of 35 | 74 | 0.07 | 5 of 7 | 72 |
| 2018 | 16.91 | 21.68 | 29 of 33 | 85 | 0.83 | 9 of 10 | 34 |
| 2019 | 16.88 | 21.25 | 36 of 46 | 70 | 0.73 | 11 of 14 | 27 |
| 2020 | 16.37 | 20.36 | 20 of 26 | 65 | 0.71 | 7 of 9 | 57 |
| 2021 | 16.56 | 19.68 | 21 of 26 | 76 | 0.73 | 7 of 12 | 66 |
| 2022 | 20.18 | 22.20 | 24 of 26 | 68 | 0.75 | 7 of 12 | 47 |
| 2023 | 21.74 | 22.97 | 24 of 27 | 76 | 0.67 | 8 of 12 | 59 |
| 2024 | 19.92 | 20.45 | 19 of 27 | 66 | 0.64 | 10 of 12 | 48 |
NSTAR Electric Company, EIA utility 54913: EIA-861, CPI-U.
CSV| NSTAR Electric Company sector | Accounts | Rate ¢/kWh | Gap to Massachusetts ¢/kWh |
|---|---|---|---|
| Residential | 1,303,076 | 19.92 | -9.43 |
| Commercial | 221,348 | 9.78 | -11.12 |
| Year | Home accounts, NSTAR Electric Company | Home ¢ | Business ¢ | Ratio | SAIDI | SAIFI |
|---|---|---|---|---|---|---|
| 2015 | 1,063,565 | 17.69 | 8.64 | 0.49 | 75 | 0.76 |
| 2016 | 1,024,972 | 16.66 | 9.23 | 0.55 | 98 | 0.91 |
| 2017 | 1,030,322 | 16.45 | 9.09 | 0.55 | 74 | 0.07 |
| 2018 | 1,230,516 | 16.91 | 9.84 | 0.58 | 85 | 0.83 |
| 2019 | 1,239,884 | 16.88 | 9.72 | 0.58 | 70 | 0.73 |
| 2020 | 1,246,086 | 16.37 | 8.54 | 0.52 | 65 | 0.71 |
| 2021 | 1,255,128 | 16.56 | 9.15 | 0.55 | 76 | 0.73 |
| 2022 | 1,289,709 | 20.18 | 9.80 | 0.49 | 68 | 0.75 |
| 2023 | 1,283,644 | 21.74 | 9.40 | 0.43 | 76 | 0.67 |
| 2024 | 1,303,076 | 19.92 | 9.79 | 0.49 | 66 | 0.64 |
| Utility near NSTAR Electric Company on price | SAIDI min, gap to NSTAR Electric Company | Home ¢, gap to NSTAR Electric Company | Gap % to NSTAR Electric Company | Accounts, NSTAR Electric Company = 1 |
|---|---|---|---|---|
| 1. City of Peabody | No data | -4.21 | -21.1% | 0.02 |
| 2. Town of Reading | -43 | -4.06 | -20.4% | 0.02 |
| 3. City of Chicopee | No data | -3.76 | -18.9% | 0.02 |
| 4. NSTAR Electric Company (this utility) | 66 | 19.92 | - | 1.00 |
| 5. City of Taunton | +127 | +1.54 | +7.7% | 0.03 |
| 6. Massachusetts Electric Co | +25 | +3.15 | +15.8% | 0.90 |
| 7. Fitchburg Gas & Elec Light Co | -2 | +4.05 | +20.3% | 0.02 |
| Class at NSTAR Electric Company | Accounts | Of NSTAR Electric Company accounts | Of NSTAR Electric Company MWh sold | kWh a year per NSTAR Electric Company account |
|---|---|---|---|---|
| Residential | 1,303,076 | 85.4% | 36.9% | 6,042 |
| Commercial | 221,348 | 14.5% | 56.6% | 54,610 |
| Industrial and other | 2,133 | 0.14% | 6.5% | 652,634 |
| NSTAR Electric Company and its neighbours on price | SAIDI min, gap to NSTAR Electric Company | Home ¢, gap to NSTAR Electric Company | Accounts, NSTAR Electric Company = 1 |
|---|---|---|---|
| 1. Public Service Co of NH (NH) | +15 | -1.18 | 0.36 |
| 2. NSTAR Electric Company (MA, this utility) | 66 | 19.92 | 1.00 |
| 3. Connecticut Light & Power Co (CT) | +11 | +5.39 | 0.85 |
| Measure | NSTAR Electric Company | Massachusetts context | NSTAR Electric Company detail |
|---|---|---|---|
| Time-of-use rate for NSTAR Electric Company homes | Not on file | 1 of 17 Massachusetts utilities offer one | no dynamic-pricing count filed by NSTAR Electric Company |
| Net-metered installations | 84,262 | 95% residential | 61.5 homes per 1,000 accounts, 18.4 kW average |
| kWh | Share of a 504 kWh month | Cost a month at 19.92 ¢ | vs U.S. | Cost a year |
|---|---|---|---|---|
| 250 | 50% | $49.80 | +$8.60 | $598 |
| 500 | 99% | $99.61 | +$17.21 | $1,195 |
| 750 | 149% | $149.41 | +$25.81 | $1,793 |
| 1,000 | 199% | $199.22 | +$34.42 | $2,391 |
| 1,500 | 298% | $298.83 | +$51.63 | $3,586 |
| 2,000 | 397% | $398.44 | +$68.84 | $4,781 |
| Measure, NSTAR Electric Compa | No events | All events | Converted |
|---|---|---|---|
| SAIDI minutes | 66.1 | 80.6 | 1.10 h |
| SAIFI interruptions | 0.639 | 0.692 | 1.56 yr apart |
| CAIDI minutes | 103.4 | 116.5 | 1.72 h |
11 Massachusetts counties, region not reported:
Massachusetts other states: 11 of 11 counties of NSTAR Electric Company drawn
NSTAR Electric Company: 11 counties listed by EIA-861, Census 2023 outlines.
CSV1,526,558 accounts in 2024: residential 1,303,076, commercial 221,348, industrial 2,133.
In 2024 homes paid 19.92 cents; against the Massachusetts average that is -32.1%.
SAIDI 66.1 min and SAIFI 0.64 a year, major events excluded; ratio to the national median 0.66, CAIDI 103 min.
84,262 installations with 1,550.8 MW, of which residential installations number 80,163.
504 kWh at 19.92 cents comes to about $100, energy only.
Rank 4 of 7 in Massachusetts on price, -32.1% against the state average; 3 charge less than 19.92 ¢.
Homes take 36.9% of 21,353,720 MWh, commercial accounts 56.6%, industrial and other 6.5%; the 221,348 commercial accounts use 54,610 kWh each, 9.0 times a home.
NSTAR Electric Company reports no home time-of-use rate; 1 of 17 Massachusetts filers do.
6th cheapest of 7 in 2015, 4th of 7 in 2024; its price rose 12.6% while Massachusetts rose 48.0%.
Place 2 of 3 on home price at 19.92 ¢ (Eversource group); median 19.92 ¢, cheapest member 18.74 ¢.
Not yet: 19.92 cents and 66 SAIDI minutes (2024) remain the newest NSTAR Electric Company record.
Home prices nearest to NSTAR Electric Company at 19.92 ¢/kWh in 2024, among companies with a page here, any state.
40 home plan records, energy charges: 9.0 to 33.9 ¢/kWh.
Who offers time-of-use and tiered rates (17 Apr 2026 snapshot).