Massachusetts electricity rates
148 residential tariffs from 42 utilities. Across the 63 filed since 2020, the median costs $0.2149 per kWh at 1,000 kWh a month once fixed charges are included — the cheapest $0.0664, the most expensive $0.9575.
$0.2149median $/kWh
42utilities
148tariffs on file
20%time-of-use
44%filed since 2020
Rate structures in Massachusetts
| Structure | Tariffs |
|---|---|
| Flat | 99 |
| Time-of-use | 21 |
| Tiered | 19 |
| Time-of-use + tiered | 8 |
| Unclassified | 1 |
Lowest effective rates at 1,000 kWh/month
Ranked across the 63 tariffs filed since 2020 — 44% of those on file here. Older filings are excluded because they are systematically below what utilities now charge; see methodology. Effective rate includes fixed charges, and availability restrictions may apply.
| Utility | Tariff | Structure | Filed | $/kWh | Annual |
|---|---|---|---|---|---|
| Town of Concord, Massachusetts (Utility Company) | RESRA Farm Residential Service Assistance Opt Out Rate | Tiered | 2026 | $0.0664 | $796.77 |
| Town of Concord, Massachusetts (Utility Company) | RESRA Residential Service Assistance Opt Out Rate | Tiered | 2026 | $0.0738 | $885.31 |
| NSTAR Electric Company | Greater Boston Residential Assistance A4 (R-3) without electric heat | Flat | 2026 | $0.0980 | $1,175.88 |
| NSTAR Electric Company | Cambridge Electric Light Company Residential Space Heating R-3 (04) | Flat | 2026 | $0.0980 | $1,175.88 |
| NSTAR Electric Company | Greater Boston Residential R-1 (A1) | Flat | 2026 | $0.1034 | $1,240.92 |
| NSTAR Electric Company | Greater Boston Residential Assistance A2 (R-2) with electric heat | Flat | 2026 | $0.1034 | $1,240.92 |
| NSTAR Electric Company | Cambridge Electric Light Company Residential R-1 (01) | Flat | 2026 | $0.1034 | $1,240.92 |
| NSTAR Electric Company | South Shore Residential R-1 Annual BS (32) | Flat | 2026 | $0.1034 | $1,240.92 |
| Town of Concord, Massachusetts (Utility Company) | R-3 Residential Service (Off Peak) ETS | Flat | 2026 | $0.1064 | $1,276.68 |
| NSTAR Electric Company | Western Massachusetts Residential Space Heating Low Income Rate R-4 | Flat | 2022 | $0.1167 | $1,400.16 |