How long does an electric water heater last?
Updated August 2026
An electric tank water heater lasts 10–15 years, a couple of years longer than a comparable gas unit, because it carries no burner or flue corroding the assembly from the outside. What it does have is two heating elements bolted into the tank, and scale is their enemy: minerals coat the lower element, force it to run hotter, and eventually burn it out. Keep the tank flushed and the anode rod fresh and 15 is very reachable; ignore both in hard water and an electric heater can fail at 9 or 10.
Lifespan by type and situation
| Type or situation | Typical lifespan | Why |
|---|---|---|
| Electric tank, average care | 10–15 years | No combustion, so the tank itself decides its fate |
| Flushed yearly, anode checked | 14–18 years | Clean elements and a live rod stretch it past gas |
| Hard water, no softener | 9–12 years | Scale buries the lower element and thickens on the walls |
| Anode rod never replaced | Cut 3–5 years | The tank steel corrodes once the rod is spent |
| Lower element burned out, replaced | Neutral | A $20–40 element is a cheap fix on a sound tank |
| Leaking from a tank seam | Days | The tank body itself has failed; replace it |
Signs yours is near the end
- Water that heats slowly or runs lukewarm, a sign the lower element is scaled or dead
- Rusty or discolored hot water while the cold runs clear
- A tank that hums, sizzles, or pops as scaled elements fight the buildup
- Hot water that empties faster than the tank rating should allow
- A breaker that trips whenever the heater calls for power
- Rust, moisture, or a puddle anywhere around the base
How to add years
Two chores decide whether you get 10 years or 16. Draining sediment from the tank once a year, twice on hard water, keeps scale off the lower element so it does not overheat and burn out, and it clears the mineral bed that dulls capacity. Checking the anode rod every 2–3 years and replacing the worn $30–60 part keeps rust eating the rod instead of the steel tank. A water softener does both jobs a favor at once. When the tank finally goes, compare a heat-pump water heater, which uses far less electricity, or a tankless unit that can nearly double the service life. A standing maintenance checklist keeps the yearly flush on the calendar.
What it costs to replace: plan on $1,300–2,200 installed. Replacing on your own schedule, before it fails, is almost always cheaper than the emergency version. The home maintenance cost calculator helps you set the money aside before it comes due.
OnOtto tracks your water heater flushes age and service history, and warns you before end of life instead of after the flood.
Track your home's systems, free for 30 daysFrequently asked questions
Why does an electric water heater last longer than a gas one?
Because it has fewer things corroding it. A gas heater carries a burner, a flue running up through the tank, and combustion byproducts, all of which age the assembly; an electric heater has none of that, so only the tank steel and the elements have to survive. That is why electric tanks commonly reach 10–15 years against a gas heater's 8–12. The trade-offs are slower reheating and a higher energy bill in most regions, plus no hot water during a power outage.
What kills an electric water heater first?
Scale and a spent anode rod, in that order. Hard-water minerals bake onto the lower heating element, which then runs hotter to push through the crust until it burns out, and they also pile up across the tank floor. Meanwhile the sacrificial anode rod dissolves to protect the steel; once it is gone, the tank itself starts rusting from the inside and eventually leaks. A yearly flush handles the scale and a rod check every 2–3 years handles the corrosion.
Is a 12-year-old electric water heater worth keeping?
It is in the normal range, so do not panic, but start a plan. Most electric tanks reach 10–15 years, and a 12-year-old one has years left if it has been flushed and re-anoded, or it may be on borrowed time if it never was. Keep using it, but avoid pouring money into a big repair, and budget for the swap. The moment you see a puddle or rust at a seam, shut off the supply and replace it, because tank leaks rarely stay small.
Can I replace a burned-out heating element instead of the whole heater?
Yes, and it is a common, cheap fix on a sound tank. Heating elements are $20–40 parts, and a lower element caked in scale or burned open is often why the water went lukewarm, not a dying tank. Kill the breaker first, since these elements run on 240 volts, then drain the tank to swap the element. What you cannot fix that way is a leaking tank body: once the steel splits at a seam, the whole heater has to go.