Tankless Water Heater (Electric) in Seattle — $381/yr to Run (11.6¢/kWh)
Your tankless water heater (electric) in Seattle costs about $32/month at 11.6¢/kWh. See daily, monthly, and yearly costs, plus tips to cut your bill.
Seattle, WA Electricity Rate
11.6¢/kWh
Utility: Seattle City Light
-11% vs national avg
National avg: 13.0¢/kWh
Daily Cost
$1.04
9.0 kWh/day
Monthly Cost
$31.75
274 kWh/mo
Annual Cost
$381
3,285 kWh/yr
Lifetime (20yr)
$7,621
energy only
Monthly Cost Breakdown in Seattle
| Period | kWh | Seattle Cost | National Avg | Difference |
|---|---|---|---|---|
| Daily | 9.0 | $1.04 | $1.17 | $-0.13 |
| Weekly | 63.0 | $7.31 | $8.19 | $-0.88 |
| Monthly | 273.8 | $31.76 | $35.59 | $-3.83 |
| Quarterly | 821.3 | $95.27 | $106.76 | $-11.50 |
| Annual | 3285.0 | $381.06 | $427.05 | $-45.99 |
Customize Your Tankless Water Heater (Electric) Cost
Adjust usage hours and electricity rate to calculate your exact cost in Seattle.
Daily
$1.04
Monthly
$31.75
Annual
$381
20-Year
$7,621
Energy Saving Tips for Tankless Water Heater (Electric) in Seattle
- ✓Seattle has below-average electricity rates, but saving energy still reduces your carbon footprint.
- ✓An ENERGY STAR Tankless Water Heater (Electric) in Seattle saves ~$76/year compared to standard models.
- ✓A smart Tankless Water Heater (Electric) with scheduling optimization can save ~$57/year at Seattle rates.
- ✓Provides hot water on demand with no standby loss
- ✓Flush annually to remove scale
- ✓Requires dedicated electrical circuit
ENERGY STAR Savings: Upgrading to an ENERGY STAR Tankless Water Heater (Electric) in Seattle saves approximately $76/year at local rates — $1,524 over the appliance lifetime.
Highest-Cost Appliances in Seattle, WA
See which appliances cost the most to run at Seattle's 11.6¢/kWh electricity rate.
Level 2 EV Charger (240V)
Transportation · 7,200W
$1,503/yr
$125.28/mo
Electric Furnace
HVAC · 10,000W
$1,044/yr
$87.00/mo
Electric Tankless Water Heater
Water Heating · 18,000W
$762/yr
$63.51/mo
EV Charger (Level 2)
Garage · 7,200W
$752/yr
$62.64/mo
Boiler (Electric)
HVAC · 6,000W
$626/yr
$52.20/mo
Electric Water Heater (Tank)
Water Heating · 4,500W
$572/yr
$47.63/mo
Water Heater (Tank Electric)
Water Heating · 4,500W
$572/yr
$47.63/mo
Heat Pump
HVAC · 2,400W
$445/yr
$37.12/mo
Tankless Water Heater (Electric) Cost in Other Washington Cities
Tankless Water Heater (Electric) Energy Cost FAQ — Seattle, WA
Understanding Tankless Water Heater (Electric) Energy Costs in Seattle, WA
In a major metro like Seattle, electricity demand is high and rates reflect the cost of maintaining infrastructure for 0.7 million residents. Running a high-draw appliance like the Tankless Water Heater (Electric) (18,000W) at Seattle's rate of 11.6¢/kWh costs approximately $381 per year — $46 less than the national average of $427.
Rates in Seattle are close to the national average, so the Tankless Water Heater (Electric)'s annual cost of $381 is broadly representative of what most US households pay. Over the 20-year expected lifespan, total energy cost reaches $7,621.
With a cost of living index of 104, Seattle is near the national median. The Tankless Water Heater (Electric)'s monthly cost of $31.75 represents a typical share of the average Seattle electric bill of $129/month. Upgrading to an ENERGY STAR Tankless Water Heater (Electric) can cut energy use by up to 20%, saving approximately $76 per year at Seattle rates.
Seattle's moderate climate (avg 49.4°F) helps keep seasonal energy cost swings manageable for most appliances. A Tankless Water Heater (Electric) produces approximately 2.35 tons of CO2 annually at typical usage. Seattle residents can reduce this footprint by choosing an ENERGY STAR certified unit, optimizing usage patterns, or investing in solar — see our solar savings calculator for Seattle.
Compare All Energy Costs in Seattle
See energy costs for 168+ household appliances at Seattle's local electricity rate.