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CostPerKWh

Cost to run an electric water heater

Water heating is one of the largest electricity uses in homes that heat water electrically. How much hot water you use matters more than tank size. Pick your state or enter your own rate to see what it costs you.

Official EIA data · August 2026

kWh

Water heater EnergyGuide labels show estimated yearly use. The default is the RECS average for homes with electric water heating.

EIA average residential price, August 2026. Your bill shows your exact rate.

Cost to run an electric water heater per month

$40.95

225.5 kWh at 18.16¢/kWh (U.S. average)

Per day
$1.35
Per year (same use every month)
$491.41

Energy per year

2,706 kWh

if used like this all year

Typical home that uses it

2,706 kWh/yr

$491.41 a year · EIA RECS, U.S.

Full details Costs in every state, real-world usage, formula and tips

Cost to run an electric water heater in every state

For 2,706 kWh a year, at each state's average residential electricity rate (August 2026, EIA). Click a state for more detail.

StateRatePer monthPer year
Nevada 12.72¢ $28.68 $344.20
Louisiana 12.87¢ $29.02 $348.26
North Dakota 13.31¢ $30.01 $360.17
Utah 13.31¢ $30.01 $360.17
Idaho 13.37¢ $30.15 $361.79
Tennessee 13.42¢ $30.26 $363.15
Nebraska 13.54¢ $30.53 $366.39
Kentucky 13.80¢ $31.12 $373.43
Arkansas 14.37¢ $32.40 $388.85
Mississippi 14.43¢ $32.54 $390.48
Wyoming 14.43¢ $32.54 $390.48
Washington 14.63¢ $32.99 $395.89
Oklahoma 14.82¢ $33.42 $401.03
North Carolina 14.95¢ $33.71 $404.55
Florida 14.99¢ $33.80 $405.63
Arizona 15.05¢ $33.94 $407.25
South Dakota 15.15¢ $34.16 $409.96
Kansas 15.47¢ $34.88 $418.62
Montana 15.57¢ $35.11 $421.32
South Carolina 15.76¢ $35.54 $426.47
Georgia 15.90¢ $35.85 $430.25
Texas 15.91¢ $35.88 $430.52
Oregon 15.92¢ $35.90 $430.80
Missouri 16.02¢ $36.13 $433.50
West Virginia 16.31¢ $36.78 $441.35
Alabama 16.33¢ $36.82 $441.89
New Mexico 16.51¢ $37.23 $446.76
Indiana 17.02¢ $38.38 $460.56
Iowa 17.06¢ $38.47 $461.64
Colorado 17.17¢ $38.72 $464.62
Minnesota 17.20¢ $38.79 $465.43
Virginia 17.64¢ $39.78 $477.34
Delaware 18.70¢ $42.17 $506.02
Illinois 19.32¢ $43.57 $522.80
Ohio 19.38¢ $43.70 $524.42
Wisconsin 19.41¢ $43.77 $525.23
Maryland 21.40¢ $48.26 $579.08
Pennsylvania 21.77¢ $49.09 $589.10
Michigan 22.99¢ $51.84 $622.11
Vermont 23.84¢ $53.76 $645.11
Connecticut 24.51¢ $55.27 $663.24
New Jersey 24.61¢ $55.50 $665.95
District of Columbia 25.98¢ $58.58 $703.02
New Hampshire 27.64¢ $62.33 $747.94
Rhode Island 28.18¢ $63.55 $762.55
New York 28.65¢ $64.61 $775.27
Alaska 29.41¢ $66.32 $795.83
California 29.75¢ $67.09 $805.04
Massachusetts 30.48¢ $68.73 $824.79
Maine 32.11¢ $72.41 $868.90
Hawaii 47.18¢ $106.39 $1,276.69

How much homes actually use, by region

Average annual electricity used by an electric water heater in homes that have one, from the EIA's 2020 Residential Energy Consumption Survey (RECS), and what that use costs at today's U.S. average rate.

RegionkWh per yearCost per year
United States2,706$491.41
New England2,124$385.72
Middle Atlantic2,528$459.08
East North Central2,673$485.42
West North Central2,870$521.19
South Atlantic2,767$502.49
East South Central2,958$537.17
West South Central2,766$502.31
Mountain North2,881$523.19
Mountain South2,340$424.94
Pacific2,588$469.98

How the cost is calculated

Appliances that run around the clock cycle on and off, so their wattage alone overstates their use. The EnergyGuide label's kWh per year already accounts for that: divide it by 12 and multiply by your rate to get the monthly cost.

How to lower the cost

  • Set the thermostat to 120 °F.
  • Fix dripping hot-water taps and use low-flow showerheads.
  • Heat-pump water heaters use a fraction of the electricity of standard electric tanks.

Quick answers

How much does it cost to run an electric water heater per month?

At the U.S. average residential rate of 18.16¢ per kWh (August 2026), 2,706 kWh a year uses about 226 kWh and costs about $40.95 a month, or $491.41 a year if used the same way all year.

Where is it cheapest to run an electric water heater?

Electricity prices vary a lot by state. In August 2026, Nevada had the lowest average residential rate (12.72¢/kWh) and Hawaii the highest (47.18¢/kWh). The same use costs $28.68 a month in Nevada and $106.39 in Hawaii.

How much electricity does an electric water heater use in an average home?

According to the EIA's Residential Energy Consumption Survey, U.S. households that have an electric water heater used about 2,706 kWh a year for it in 2020. At today's average rate that is about $491.41 a year.

Sources

Last reviewed November 2, 2026. Rates refreshed automatically when EIA publishes a new month.

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See everything

These are estimates. State rates are EIA averages (total residential revenue ÷ kWh sold), so they include fixed monthly charges spread across usage; your own price per kWh, time-of-use rates and taxes can differ. Real appliance use depends on the model, settings, climate and habits.