Gas vs. Electric Water Heater: Which Costs Less?
Replacing a water heater usually comes down to the fuel you already have — but if you have a choice between gas and electric, the cheaper option depends on install cost, your local energy prices, and how much hot water your household burns through.
Electric tanks cost less to buy and install and are the only choice without a gas line. Gas tanks cost more upfront but typically run cheaper where natural gas is available and reheat faster for big families. And a modern heat-pump (hybrid) electric model changes the math entirely by slashing energy use. The table below lays out the trade-offs.
| Factor | Electric tank | Gas tank |
|---|---|---|
| Installed cost | $900 – $2,200 | $1,200 – $3,100 |
| Operating cost | Higher where electricity is pricey | Usually lower where gas is available |
| Efficiency | Very high at the unit; heat-pump models cut use 60–70% | Loses some heat up the flue |
| Recovery (reheat) speed | Slower | Faster — better for big households |
| Install needs | 240V circuit | Gas line + venting |
| Best for | No gas line, or pairing with a heat-pump model | Existing gas service, large households |
The verdict
If your home already has a gas line and a busy household, a gas tank usually costs less to run and reheats faster — often the cheaper long-term choice. Electric is cheaper to install and is the only option without gas service; better still, a heat-pump (hybrid) electric model can cut energy use 60–70% and beat gas on operating cost where electricity isn't too expensive. Decide based on whether you have gas, your local rates, and how much hot water you use.
Frequently asked questions
- Is a gas or electric water heater cheaper?
- Electric units cost less to install; gas units usually cost less to operate where natural gas is available. A heat-pump electric model can be the cheapest to run overall.
- Which is more efficient?
- A standard electric tank converts nearly all its energy to heat, while gas loses some up the flue — but electricity often costs more per unit of heat. Heat-pump electric heaters are the most efficient by far.
- Which reheats faster?
- Gas heaters have a faster recovery rate, making them better for large households with heavy, clustered hot-water use.
- Can I switch from electric to gas?
- Yes, but it requires running a gas line and adding venting, which adds several hundred to a couple thousand dollars to the install.
How we estimate: ranges are cross-checked against current 2026 industry sources (see our data & methodology). Your actual cost depends on local rates — always get multiple written quotes.
Sources
Cost ranges on this page were checked against current (2026) data from these industry sources:
- Water Heater Cost in 2026 — NerdWallet
- Water Heater Replacement Cost (2026 Data) — Angi
- Water Heater Installation or Replacement Cost (2026) — HomeGuide