What an electric water heater costs to run in Oregon
Oregon homes use 3,656 kWh a year on an electric water heater. Priced on top of the rest of the bill, that costs $412.58 to $698.76 a year across 8 published Oregon plans — a $286.18 gap. Checked September 2, 2026.
Every priced plan, average
| Plan | Per year | vs cheapest | Effective |
|---|---|---|---|
| Residential Electric Vehicle TOU Option (Rate 7-EV)time-of-use · needs an electric vehicle | $124.15 | −$288.43 | 4.7¢ |
| Residential Electric Vehicle TOU Option (Rate 7-EV)time-of-use · tiered · needs an electric vehicle | $340.88 | −$71.70 | 10.6¢ |
| Residential Time-Of-Use Service (Rate 7-TOU)✓ cheapesttime-of-use · tiered | $412.58 | — | 12.5¢ |
| Residential Time-Of-Use Service (Rate 7- TOU or EV)time-of-use · tiered · needs an electric vehicle | $536.26 | +$123.68 | 16.4¢ |
| Residential Service (Rate 7)tiered | $569.28 | +$156.70 | 17.3¢ |
| Residential Time-Of-Use Service (Rate 7-TOU of EV)time-of-use · tiered · needs an electric vehicle | $655.58 | +$243.00 | 19.7¢ |
| Residential Service (Rate 7)tiered | $669.48 | +$256.90 | 20.1¢ |
| Residential Service (Rate 7)tiered | $698.76 | +$286.18 | 20.9¢ |
Cost across usage levels
The cheapest plan at each consumption level, showing whether the ranking holds as usage changes.
- Lighter use — cheapest $191.45 (Residential Time-Of-Use Service (Rate 7-TOU)), dearest $324.24, a $132.79 spread
- Average — cheapest $412.58 (Residential Time-Of-Use Service (Rate 7-TOU)), dearest $698.76, a $286.18 spread
- Heavier use — cheapest $538.79 (Residential Time-Of-Use Service (Rate 7-TOU)), dearest $912.48, a $373.69 spread
What an electric water heater costs here
Across 8 plans priced in Oregon, an electric water heater adds $412.58 to $698.76 a year — $34.38 to $58.23 a month. The median plan puts an electric water heater at $619.38 a year.
Cheapest for an electric water heater: Residential Time-Of-Use Service (Rate 7-TOU), Portland General Electric Co. Dearest: Residential Service (Rate 7), Portland General Electric Co.
Those 3,656 kWh are billed at 11.3¢–19.1¢, against a 18.7¢ whole-bill average on the median plan: they land in the last tier the household reaches, so the average rate understates them by up to 0.4¢ per kWh.
What Oregon homes use
EIA's 2020 residential survey found 3,656 kWh a year across 196 sampled homes that run one, 1.35× the national 2,706 kWh. The middle half spans 1,697 kWh to 4,775 kWh, so an electric water heater varies by 3,078 kWh between one household and another.
Electricity used to heat water for washing, bathing and appliances. That average covers homes with an electric water heater — 66% of homes here, against 47% nationally.
That makes an electric water heater about 33% of the electricity an Oregon home uses. The remaining 7,476 kWh is what an electric water heater is billed on top of, and on a tiered or time-of-use plan that is what sets the rate it meets.
Light and heavy use of an electric water heater
A household in the lighter quarter runs an electric water heater for 1,697 kWh a year and pays $191.45 on the cheapest plan. One in the heavier quarter runs it for 4,775 kWh and pays $538.79 — $347.34 more for an electric water heater on the same tariff.
Limits
A 2020 survey average for Oregon, not a measurement of any one home, priced against the 8 Oregon tariffs WattClear has ingested — not every plan sold there.
New to these terms? The methodology page explains tiered bands, time-of-use periods and fixed charges, and sets out exactly what the rate engine assumes.
Estimate — your actual bill may differ.
Tariff structures from NREL/OpenEI Utility Rate Database (CC0 1.0), retrieved September 2, 2026.
Location resolved through the US Census Bureau Geocoder (Public domain) at 45.5152, -122.6784.