Electric vs gas water heaters is a question with a regionally variable answer — just like electric vs gas heat. The cheapest option depends on your local electricity and gas rates. However, the emergence of heat pump water heaters has changed the calculus significantly for electric homes.
Standard Electric Tank: Convenient but Costly
Electric resistance tank water heaters are 100% efficient (all electricity becomes heat), but electricity costs more per BTU than gas in most U.S. markets. At 13¢/kWh, heating 50 gallons from 60°F to 120°F costs about $0.41. Annual operating cost for a family of 4: $500–700. Easy installation (no gas line needed), simple maintenance, and lower upfront cost ($400–800).
Gas Tank: Lower Operating Cost in Most Regions
Gas tank water heaters are 60–70% efficient (AFUE). At $1.30/therm, heating 50 gallons costs about $0.20. Annual operating cost: $200–350. Gas heaters recover faster than electric, making them better for high-demand households. Installation requires a gas line and proper venting. Cost: $600–1,000 installed.
Heat Pump Water Heater: The Efficiency Game-Changer
Heat pump water heaters (HPWH) achieve 200–350% efficiency by moving heat from surrounding air into the water. Annual operating cost at 13¢/kWh: $150–250 — less than gas. Upfront cost: $1,000–1,500, but the 30% federal tax credit (up to $600) and many state utility rebates bring the effective cost to $700–1,050. Payback vs. standard electric: 3–5 years. Payback vs. gas: 5–8 years in most regions.
Which Makes Sense for Your Home?
- Gas (where available): Best operating cost in most U.S. regions except where electricity is very cheap
- Heat pump water heater: Best for homes on electric already — beats gas on operating cost in most regions when factoring in the tax credit
- Standard electric: Only if gas isn't available and a heat pump water heater is outside budget