Electric vs. Gas Water Heater
This is the baseline comparison between the two most common standard water heater types, before considering higher-efficiency options like heat pump or tankless units. It's a useful starting point if you're not sure which fuel type to lean toward.
At your inputs, the gas water heater costs $1,800 less over 10 years.
| Standard electric resistance water heater total cost over the horizon | $6,400 |
|---|---|
| Standard gas storage water heater total cost over the horizon | $4,600 |
Breakeven: The higher upfront cost is offset by year 1.0, after which the gas water heater stays cheaper.
- This uses planning estimates you entered, not a contractor quote or guaranteed savings.
- A lower calculated cost does not measure recovery speed or venting requirements; weigh those separately.
What this also tells you: Even if your annual costs are 20% higher or lower than entered, the same option stays cheaper, with the advantage ranging from $1,400 to $2,200.
This is a planning estimate based on your entries. It does not size equipment, determine electrical or building-code compliance, verify incentive eligibility, or replace a contractor quote or professional energy audit.
Why this decision comes up
For a homeowner without a strong efficiency or electrification preference, the basic electric-versus-gas comparison is often the real starting question before considering more specialized options.
How this is calculated
Both paths are compared as total cost over your ownership horizon: net cost plus annual energy cost carried forward.
A worked example
With the defaults (electric: $900 net cost, $550/year; gas: $1,100 net cost, $350/year; 10-year horizon), gas totals $4,600 against $6,400 for electric, a substantial $1,800 advantage for gas at these defaults, driven by electric resistance's higher annual energy cost.
Common mistakes
A common mistake is stopping at this basic comparison without checking whether a heat pump water heater changes the picture, since it often beats standard electric by a wide margin.
Limitations
This compares only the two standard unit types. See the heat pump comparison tools in this cluster before finalizing a decision based on cost alone.
Common questions
Why does gas usually win this specific comparison?
Gas is often priced lower per unit of delivered heat than electricity, and a standard gas water heater does not carry the efficiency penalty a standard electric resistance unit does. This can change with your specific local rates.
Should I stop here, or check the higher-efficiency options too?
This is a good baseline, but a heat pump water heater often beats standard electric outright, and can be competitive with gas too. Check the heat pump comparison tools before finalizing your decision.
Does this account for installing a new gas line if I don't have one?
No, only your entered installed cost, which should include any new gas line work if that applies to your home.
Does tank size affect this comparison?
A larger tank costs somewhat more and can use more standby energy. Match the size you actually need to your household's hot water demand, and use your contractor's quote for that size rather than a generic single-size default.
What if I'm not sure whether gas service is even available at my address?
Confirm with your utility whether gas service is available before pricing a gas option. A home without existing gas access may need significant additional line-installation cost not reflected in a simple unit-price comparison.