Kauai Island Utility Cooperative electricity rates
Electric cooperative · Hawaii · HICC region
Kauai Island Utility Cooperative is a member-owned electric cooperative, so its customers own it and elect its board, serving 30,335 homes in Hawaii. Its residential customers pay an average of 40.70¢/kWh including fixed and delivery charges, 126% more than the U.S. average.
Rate basis: EIA-861M monthly utility data, 12 months ending 2026-07.
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Kauai Island Utility Cooperative bill estimates
| Monthly use | At average all-in rate | Base tariff charges* |
|---|---|---|
| 500 kWh | $203.50 | $182.30 |
| 1,000 kWh | $407.00 | $353.17 |
| 1,500 kWh | $610.50 | $524.05 |
| 2,000 kWh | $814.00 | $694.92 |
*D Residential Service (effective 2025-07-01, $11.42/month customer charge), energy and fixed charges from the OpenEI Utility Rate Database. Riders, fuel adjustments and taxes are often billed separately, so real bills usually land closer to the all-in column. Calculate your bill.
Kauai Island Utility Cooperative residential rate plans
| Plan | Effective | Customer charge | Energy charges |
|---|---|---|---|
| D Residential Service | 2025-07-01 | $11.42 | 34.17¢ |
Source: OpenEI U.S. Utility Rate Database. Rates change. Check the linked tariff or your bill for current figures.
Kauai Island Utility Cooperative rate history
2015–2025: +12% change in the average residential rate (34.30¢ → 38.43¢). Annual EIA-861 data.
Outages & reliability
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Reliability history
| 2025 | Kauai Island Utility Cooperative | Hawaii avg | U.S. avg |
|---|---|---|---|
| Outage minutes per customer (SAIDI) | 335 | 282 | 266 |
| Outages per customer (SAIFI) | 3.45 | 2.02 | 1.34 |
| Average restoration time (CAIDI) | 97 min | — | — |
| Outage minutes excluding major storms | 202 | 188 | 121 |
Outages in counties served (2025)
From ORNL EAGLE-I, which tracks customers without power every 15 minutes. These counts cover every utility in each county. Weighted across Kauai Island Utility Cooperative's counties, customers averaged 10 hr 31 min without power.
| County | Outage min/customer | Days with outages | Peak customers out | Worst day |
|---|---|---|---|---|
| Kauai | 631 | 73 | 56,195 | 2025-10-14 |
Kauai Island Utility Cooperative service area
Kauai Island Utility Cooperative serves Kauai County in Hawaii and 17 ZIP codes.
Kauai
Cities: Kapa‘a, Waimea, Lihue, Wailua Homesteads, Kalāheo, Hanamā‘ulu, Kekaha, Puhi, Kīlauea, Hanapēpē Heights, Hanapēpē, ‘Ele‘ele, Lawai, Wailua, Anahola, Princeville, Koloa, ‘Ōma‘o, Po‘ipū
Programs, smart meters & solar
| Smart meters (AMI) for homes | 97% |
| Customers with daily usage data online | 29,368 |
| Time-based rate programs | None reported |
| Net-metered solar homes | 6,227 |
| Home batteries paired with solar | 2,472 |
| Residential efficiency incentives paid (2025) | $419,918 |
| Residential energy saved by programs | 2,334 MWh |
Kauai Island Utility Cooperative at a glance
| Ownership | Electric cooperative |
| Services | Generation, Transmission, Distribution |
| Commercial rate | 41.71¢/kWh |
| Industrial rate | 36.62¢/kWh |
| Retail revenue (2025) | $180,865,000 |
| Electricity sold (2025) | 487,395 MWh |
| Peak demand | 86 MW summer · 78 MW winter |
| Power from own generation | 53% (rest purchased) |
| Line losses | 4.1% |
| EIA utility ID | 10071 |
| Website | www.kiuc.coop |
Other utilities in Hawaii
Frequently asked questions
What is Kauai Island Utility Cooperative's electricity rate?
Kauai Island Utility Cooperative residential customers pay an average of 40.70¢ per kWh, all charges included (EIA-861M monthly utility data, 12 months ending 2026-07). That's 6% below the Hawaii average of 43.51¢ and 126% above the U.S. average.
What is the average Kauai Island Utility Cooperative electric bill?
About $225 a month. The average Kauai Island Utility Cooperative home uses 553 kWh a month. At 1,000 kWh the bill would be about $407.
How many customers does Kauai Island Utility Cooperative have?
Kauai Island Utility Cooperative serves 30,335 residential customers and 35,617 customers in total in Hawaii, across 1 county.
How reliable is Kauai Island Utility Cooperative?
In 2025, the average Kauai Island Utility Cooperative customer was without power for 5 hr 35 min (SAIDI) over 3.45 interruptions (SAIFI), including major storms. Excluding major event days it was 3 hr 22 min. The Hawaii average was 4 hr 42 min and the U.S. average 4 hr 26 min.
Does Kauai Island Utility Cooperative offer net metering for solar?
Kauai Island Utility Cooperative had 6,227 residential net-metered customers in 2025 with 28.9 MW of capacity and 2,472 solar-paired batteries. Estimate solar savings at this utility's rate.
Sources: EIA-861 2025 and EIA-861M (through July 2026), OpenEI URDB, ORNL EAGLE-I, U.S. Census. Methodology. Spot an error? Rates change often, so confirm with Kauai Island Utility Cooperative before making decisions.