Tankless Water Heater (Electric) in Boise — $370/yr to Run (11.3¢/kWh)
Your tankless water heater (electric) in Boise costs about $31/month at 11.3¢/kWh. See daily, monthly, and yearly costs, plus tips to cut your bill.
Boise, ID Electricity Rate
11.3¢/kWh
Utility: Idaho Power
-13% vs national avg
National avg: 13.0¢/kWh
Daily Cost
$1.01
9.0 kWh/day
Monthly Cost
$30.80
274 kWh/mo
Annual Cost
$370
3,285 kWh/yr
Lifetime (20yr)
$7,391
energy only
Monthly Cost Breakdown in Boise
| Period | kWh | Boise Cost | National Avg | Difference |
|---|---|---|---|---|
| Daily | 9.0 | $1.01 | $1.17 | $-0.16 |
| Weekly | 63.0 | $7.09 | $8.19 | $-1.10 |
| Monthly | 273.8 | $30.80 | $35.59 | $-4.79 |
| Quarterly | 821.3 | $92.39 | $106.76 | $-14.37 |
| Annual | 3285.0 | $369.56 | $427.05 | $-57.49 |
Customize Your Tankless Water Heater (Electric) Cost
Adjust usage hours and electricity rate to calculate your exact cost in Boise.
Daily
$1.01
Monthly
$30.80
Annual
$370
20-Year
$7,391
Energy Saving Tips for Tankless Water Heater (Electric) in Boise
- ✓Boise has below-average electricity rates, but saving energy still reduces your carbon footprint.
- ✓An ENERGY STAR Tankless Water Heater (Electric) in Boise saves ~$74/year compared to standard models.
- ✓A smart Tankless Water Heater (Electric) with scheduling optimization can save ~$55/year at Boise 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 Boise saves approximately $74/year at local rates — $1,478 over the appliance lifetime.
Highest-Cost Appliances in Boise, ID
See which appliances cost the most to run at Boise's 11.3¢/kWh electricity rate.
Level 2 EV Charger (240V)
Transportation · 7,200W
$1,458/yr
$121.50/mo
Electric Furnace
HVAC · 10,000W
$1,013/yr
$84.38/mo
Electric Tankless Water Heater
Water Heating · 18,000W
$739/yr
$61.59/mo
EV Charger (Level 2)
Garage · 7,200W
$729/yr
$60.75/mo
Boiler (Electric)
HVAC · 6,000W
$608/yr
$50.63/mo
Electric Water Heater (Tank)
Water Heating · 4,500W
$554/yr
$46.20/mo
Water Heater (Tank Electric)
Water Heating · 4,500W
$554/yr
$46.20/mo
Heat Pump
HVAC · 2,400W
$432/yr
$36.00/mo
Tankless Water Heater (Electric) Cost in Other Idaho Cities
| City | Rate | Annual Cost | vs Boise |
|---|---|---|---|
| Boise (current) | 11.3¢ | $370 | — |
| Meridian | 10.2¢ | $334 | $-36 |
| Nampa | 11.7¢ | $384 | +$14 |
| Idaho Falls | 10.8¢ | $354 | $-15 |
| Caldwell | 11.2¢ | $369 | $-0 |
| Pocatello | 10.3¢ | $338 | $-31 |
| Coeur d'Alene | 11.6¢ | $380 | +$10 |
| Twin Falls | 10.0¢ | $328 | $-42 |
Tankless Water Heater (Electric) Energy Cost FAQ — Boise, ID
Understanding Tankless Water Heater (Electric) Energy Costs in Boise, ID
Boise is a mid-sized Idaho city where residential electricity rates from Idaho Power are shaped by regional energy supply and local demand patterns. Running a high-draw appliance like the Tankless Water Heater (Electric) (18,000W) at Boise's rate of 11.3¢/kWh costs approximately $370 per year — $57 less than the national average of $427.
Rates in Boise are close to the national average, so the Tankless Water Heater (Electric)'s annual cost of $370 is broadly representative of what most US households pay. Over the 20-year expected lifespan, total energy cost reaches $7,391.
With a cost of living index of 98, Boise is near the national median. The Tankless Water Heater (Electric)'s monthly cost of $30.80 represents a typical share of the average Boise electric bill of $138/month. Upgrading to an ENERGY STAR Tankless Water Heater (Electric) can cut energy use by up to 20%, saving approximately $74 per year at Boise rates.
Boise's moderate climate (avg 49.7°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. Boise 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 Boise.
Compare All Energy Costs in Boise
See energy costs for 178+ household appliances at Boise's local electricity rate.
Frequently Asked Questions
How much does it cost to run a Tankless Water Heater (Electric) in Boise, ID?
At Boise's average electricity rate of 11.3¢/kWh, a Tankless Water Heater (Electric) costs approximately $370 per year to run. That's about $30.80 per month with typical usage of 0.5 hours per day.
What is the electricity rate in Boise, ID?
The average residential electricity rate in Boise, ID is 11.3¢/kWh, which is 13% below the national average of 13.0¢/kWh. The primary utility provider is Idaho Power.
How much electricity does a Tankless Water Heater (Electric) use per year?
A Tankless Water Heater (Electric) uses approximately 18,000 watts and consumes about 3,285 kWh per year with typical usage of 0.5 hours/day for 365 days/year.
Is a Tankless Water Heater (Electric) expensive to run in Boise?
Compared to the national average cost of $427/year, running a Tankless Water Heater (Electric) in Boise costs $57 less per year due to lower local electricity rates.
How can I reduce my Tankless Water Heater (Electric) energy cost in Boise?
To reduce Tankless Water Heater (Electric) costs in Boise: Provides hot water on demand with no standby loss. Flush annually to remove scale. Upgrading to an ENERGY STAR model saves up to 20% on energy costs. Also check with Idaho Power for local energy efficiency rebates and programs.