What Does an Electric Water Heater Cost to Run? (Tank vs Tankless)
Last updated: October 18, 2026 · 6 min read
It sits in a closet or the garage and you almost never think about it, yet the tank quietly keeping your water hot is one of the steadiest draws on your power bill. Unlike the air conditioner, it works every month of the year — so a few small changes to how it runs, and to the rate you pay for the energy it uses, add up over time.
The short answer
A standard electric tank water heater uses roughly 300 to 500 kWh a month — about $40 to $70 at an example rate near 14 cents per kWh — which makes it one of the biggest electricity users in a Texas home after cooling. The cheapest fixes cost nothing: turn the tank down to about 120°F, stop hot-water leaks, and use less hot water. For a bigger cut, a heat-pump (hybrid) model uses far less energy than a standard tank.
Where the Money Goes: A Tank That Never Sleeps
Water heating is one of the largest electricity users in a Texas home once you get past cooling — and it runs all year. A standard electric tank keeps 40 or 50 gallons hot at all times using a heating element rated around 4,000 to 4,500 watts. Every time hot water is drawn, or the tank simply loses heat sitting there, that element kicks on to bring it back up to temperature. Over a month that adds up to roughly 300 to 500 kilowatt-hours for many households — about $40 to $70 at an example rate near 14 cents per kWh. Where it lands on your bill depends on how many people are taking showers and running hot loads; our roundup of what uses the most electricity in a Texas home puts it in context, and the cost to run common appliances guide covers the rest of the house.
Cheap Ways to Cut It Before You Replace Anything
The best news is that the biggest savings do not require buying a new unit. Start with the thermostat on the tank itself: many are set near 140°F from the factory, and dialing them back to about 120°F cuts the energy wasted holding water hotter than you need — and lowers the scald risk at the same time. From there, fix any dripping hot-water taps, since a slow hot leak quietly reheats gallons all day. Insulate an older bare tank and the first few feet of pipe so it holds heat longer between draws. And simply use less hot water where it is painless — washing clothes in cold is the easy win, because the machine barely notices but the water heater certainly does. None of these change your equipment; they just stop it from working so hard.
Tank vs Tankless vs Heat-Pump
If you are ready to replace the unit, the type you choose matters far more than the brand on the box. Here is how the three options a Texas home usually weighs stack up:
| Type | How it heats | The catch in Texas |
|---|---|---|
| Standard electric tank | A 4,000-4,500 W element reheats a full tank around the clock. | Constant standby loss; the baseline most homes are trying to beat. |
| Electric tankless | Heats water only on demand, so there is no standby loss. | Enormous instantaneous current draw; often needs a costly panel or service upgrade. |
| Heat-pump (hybrid) | Moves heat from the surrounding air instead of making it directly. | Higher upfront cost and needs some air space, but far less energy. |
Electric tankless is not the obvious win
Going tankless eliminates standby loss, but heating water instantly takes a huge jolt of power — enough that many homes need an expensive electrical-panel or service upgrade to feed an electric unit. That is why a lot of Texas homes that go tankless choose gas instead. If the goal is a lower electric bill, the standout electric option is a heat-pump (hybrid) model, which uses roughly 60 to 70% less energy than a standard electric tank (ENERGY STAR) and is usually the best electric upgrade.
Your Rate Is the Multiplier
Here is the piece people forget: every one of those kilowatt-hours is billed at your rate, so water heating is not only an appliance question — it is a plan question too. Trim 100 kWh a month with a lower temperature and cold laundry and you save that energy once; move to a cheaper per-kWh plan and you save on every remaining kilowatt-hour the heater burns, month after month, all year. The two levers multiply. It is also a reminder that a plan advertised as cheap at exactly 1,000 kWh can quietly be the wrong choice once a hungry water heater pushes your real usage higher — the 1,000 kWh illusion in action.
⚡ Lower the rate on every kWh your heater uses
A water heater runs all year, so a cheaper per-kWh plan quietly pays you back every month. Compare every plan in your ZIP at your real usage and see how much a better rate saves.
Compare Plans Free →Common Questions
How much does an electric water heater cost per month in Texas?
A standard electric tank water heater typically uses somewhere around 300 to 500 kWh a month, which comes to roughly $40 to $70 at an example rate near 14 cents per kWh. The exact figure depends on your household size, how much hot water you use, the tank temperature, and your actual per-kWh rate. It is usually one of the largest electricity users in a Texas home after air conditioning, and unlike the AC it runs all year.
Is a tankless water heater cheaper in Texas?
It can trim standby loss — the energy a tank wastes reheating water around the clock — but electric tankless models draw a very high current on demand and often need a costly electrical-panel or service upgrade, which is why many Texas homes use gas tankless instead. If your goal is a lower electric bill, a heat-pump (hybrid) water heater usually saves far more per dollar spent than switching to electric tankless.
What temperature should I set my water heater?
About 120°F is the widely recommended setting. Many tanks ship set closer to 140°F, which wastes energy and raises the risk of scalding. Dialing it back to roughly 120°F trims standby losses noticeably while still giving most homes plenty of hot water. If anyone in the household has specific health needs, check current guidance before changing it.
Do heat-pump water heaters save money?
Usually yes — for most homes they are the standout electric option. A heat-pump (hybrid) water heater moves heat from the surrounding air instead of generating it directly, and uses roughly 60 to 70% less energy than a standard electric tank, according to ENERGY STAR. That can cut the water-heating slice of your bill substantially. The upfront cost is higher and they work best in a spot with enough surrounding air and space, so it is worth checking the fit.