Hawaii electricity rates
25 residential tariffs from 4 utilities. Across the 6 filed since 2020, the median costs $0.3752 per kWh at 1,000 kWh a month once fixed charges are included — the cheapest $0.3532, the most expensive $0.3991.
$0.3752median $/kWh
4utilities
25tariffs on file
56%time-of-use
25%filed since 2020
Rate structures in Hawaii
| Structure | Tariffs |
|---|---|
| Time-of-use + tiered | 12 |
| Tiered | 10 |
| Time-of-use | 2 |
| Flat | 1 |
Lowest effective rates at 1,000 kWh/month
Ranked across the 6 tariffs filed since 2020 — 25% 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 |
|---|---|---|---|---|---|
| Kauai Island Utility Cooperative | D Residential Service | Flat | 2025 | $0.3532 | $4,238.04 |
| Hawaiian Electric Co Inc | SCHEDULE ARD TOU R - Residential Time of Use - Single Phase | Time-of-use | 2026 | $0.3671 | $4,405.13 |
| Hawaiian Electric Co Inc | SCHEDULE ARD TOU R - Residential Time of Use - Three Phase | Time-of-use | 2026 | $0.3680 | $4,415.81 |
| Hawaiian Electric Co Inc | SCHEDULE R RESIDENTIAL SERVICE - Single Phase | Tiered | 2026 | $0.3824 | $4,588.63 |
| Hawaiian Electric Co Inc | SCHEDULE R RESIDENTIAL SERVICE - Three Phase | Tiered | 2026 | $0.3933 | $4,719.55 |
| Hawaiian Electric Co Inc | SCHEDULE TOU-R RESIDENTIAL TIME-OF-USE SERVICE - Three Phase - Closed Rate | Time-of-use + tiered | 2023 | $0.3991 | $4,788.61 |