Is electricity expensive in Idaho?

Idaho's residential average of 14.4¢/kWh is 22% below the U.S. average of 18.3¢/kWh, ranking 10 of 51 jurisdictions (1 = cheapest).

What's the cheapest electric water heater to run in Idaho?

Among currently certified models, the Eco-Logical OMNI-50HP1-1A costs the least at about $98 a year at Idaho rates (681 kWh/yr).

How does Idaho compare with other states?

The same median electric water heater costs $159 a year in Nevada (the cheapest state) and $638 in Hawaii (the priciest). Idaho sits at $174.

Data through June 2026

Cost to run · Idaho · 14.4¢/kWh residential average

How much does it cost to run an electric water heater in Idaho?

$174/yr · median certified model

Idaho's 14.4¢/kWh rate undercuts the national average by 22%, so the typical certified electric water heater costs roughly $174 a year here instead of $222.

In the national ranking, Idaho lands at 10 of 51 for what an electric water heater costs to run. Model choice matters as much as geography: at Idaho rates the most efficient certified model (Eco-Logical OMNI-50HP1-1A) costs $98 a year while the most power-hungry (Smart Solar SSG2-ES 120) costs $250 — a spread of $152 every year. For reference, the national extremes are Nevada (13.1¢/kWh) and Hawaii (52.7¢/kWh); the same median electric water heater would cost $159 and $638 a year there.

Idaho

$174

US average

$222

Nevada

$159

Hawaii

$638

Median certified electric water heater (1,210 kWh/yr) per year, at each rate

The cheapest water heaters (electric) to run at Idaho rates

Top 10 by certified kWh, priced at 14.4¢/kWh
#	Model	kWh/yr	$/yr in ID
1	Eco-Logical OMNI-50HP1-1A	681	$98
2	GE Profile PF40S10FPY01	724	$104
3	Eco-Logical OMNI-50HP2-1A	769	$111
4	GE Profile PH40S10BPY01	773	$111
5	Friedrich PROH40 T0 FD120-M	780	$112
6	Friedrich PROH40 T0 FD120-MSO	780	$112
7	Rheem PROPH40 T0 RH120-M	780	$112
8	Rheem PROPH40 T0 RH120-MSO	780	$112
9	Rheem XE40T10HM00U0	780	$112
10	Rheem XE40T10HMS00U0	780	$112

Price any model at Idaho rates

Your rate, your numbers

Annual use (kWh)

Electricity rate

Per day: 48¢
Per month: $14.49
Per year: $174

1,210 kWh/yr × 14.4¢/kWh = $174/yr

Prefilled with the median certified electric water heater (1,210 kWh/yr). Every model page on this site carries its exact certified figure.

Questions, answered with the data

How much does it cost to run an electric water heater in Idaho?: About $174 a year for the median ENERGY STAR certified electric water heater, at Idaho's average residential rate of 14.4¢/kWh — that's $14.49 a month.
Is electricity expensive in Idaho?: Idaho's residential average of 14.4¢/kWh is 22% below the U.S. average of 18.3¢/kWh, ranking 10 of 51 jurisdictions (1 = cheapest).
What's the cheapest electric water heater to run in Idaho?: Among currently certified models, the Eco-Logical OMNI-50HP1-1A costs the least at about $98 a year at Idaho rates (681 kWh/yr).
How does Idaho compare with other states?: The same median electric water heater costs $159 a year in Nevada (the cheapest state) and $638 in Hawaii (the priciest). Idaho sits at $174.

Keep digging

Rate source: US EIA, average residential price of electricity, see methodology.