38.43¢
per kWh, 2025
[ Kauai Island Utility Cooperative / HI ]
Kauai Island Utility Cooperative electricity rates in Hawaii
CO-OP BOARD SETS RATES · DATA 2025
change in average rate, 2024→2025
−6.9%
vs 2024
30,335
residential customers
+14.0%
since 2020
What your bill becomes
Bill today
No change on file
Difference / month · / year
Estimated at Kauai Island Utility Cooperative's average effective residential rate (38.43¢/kWh, EIA, all charges included). Your tariff, fees and taxes differ.
Rate history 2015–2025
| Year | ¢/kWh | Change | Customers |
|---|---|---|---|
| 2015 | 34.30¢ | — | 28,658 |
| 2016 | 34.03¢ | −0.8% | 28,574 |
| 2017 | 34.52¢ | +1.4% | 28,766 |
| 2018 | 37.30¢ | +8.1% | 28,961 |
| 2019 | 34.87¢ | −6.5% | 29,195 |
| 2020 | 33.70¢ | −3.4% | 29,510 |
| 2021 | 36.33¢ | +7.8% | 29,803 |
| 2022 | 39.31¢ | +8.2% | 29,936 |
| 2023 | 37.54¢ | −4.5% | 30,025 |
| 2024 | 41.29¢ | +10.0% | 30,109 |
| 2025 | 38.43¢ | −6.9% | 30,335 |
How this compares
40.40¢
Hawaii average, 2025
−4.9%
Kauai Island Utility Cooperative vs HI 2025 average
+123.0%
vs US 2025 average
#4
priciest in HI
Serves 1 county in Hawaii: Kauai. 17 ZIP codes.
What the numbers show
Since 2015, Kauai Island Utility Cooperative's average residential rate has gone from 34.30¢ to 38.43¢ per kWh: +12.0% over 10 years, or about +1.1% a year. It rose in 5 of the 10 years we can compare, and the biggest one-year increase was +10.0% in 2024. The largest drop was −6.9% in 2025.
For a home using 515 kWh a month, the Hawaii average, Kauai Island Utility Cooperative's 2025 rate works out to about $2,375 a year, $122 less than at Hawaii's average rate of 40.40¢. Of the 4 Hawaii utilities in our data with a 2025 price, it is the least expensive.
Kauai Island Utility Cooperative served 28,658 homes in 2015 and 30,335 in 2025 (+5.8%), about 7% of Hawaii's residential electricity customers.
Who sets Kauai Island Utility Cooperative's rates
Kauai Island Utility Cooperative is a member-owned electric cooperative. A board elected by its members sets its rates. In some states the Hawaii Public Utilities Commission also reviews co-op rates, but most co-op rate changes do not go through a commission rate case, so watch the co-op's own member notices and board meetings.
Commission contact: Hawaii Public Utilities Commission. How we calculate every figure on this page: methodology.
Questions
Is Kauai Island Utility Cooperative raising rates in 2026?
Kauai Island Utility Cooperative's rates are set by its member-elected board, not through a rate case at the Hawaii Public Utilities Commission, so check its own notices for a change this year. Its average residential rate moved −6.9% from 2024 to 2025.
What does Kauai Island Utility Cooperative charge per kWh?
Kauai Island Utility Cooperative's average effective residential rate was 38.43¢ per kWh in 2025 (EIA-861, revenue divided by sales, all charges included). Hawaii's 2025 average was 40.40¢.
How much have Kauai Island Utility Cooperative rates gone up in five years?
+14.0% between 2020 and 2025, against +43.4% for Hawaii as a whole over the latest five-year window.
How many customers does Kauai Island Utility Cooperative have in Hawaii?
30,335 residential customers in 2025, across 1 county including Kauai, according to the EIA-861 survey.
Where do these numbers come from?
Rates and customer counts are from the US Energy Information Administration's annual EIA-861 survey, which every US utility files. Nothing here is a utility bill; use it to understand the direction and size of changes.
Sources
- EIA-861 Sales to Ultimate Customers, 2015–2025 (released 2026-10-07)
- EIA-861M monthly state averages through Jul 2026
- NREL utility-by-ZIP lookup (2024)