Gas vs Electric Water Heater Cost: Which Is Cheaper to Own?

By Water Heater Replacement Cost Editorial Team, independent cost research
Updated 2026-06-17

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Gas vs electric water heater: upfront cost

Electric tank water heaters are generally $50 to $200 less expensive to purchase than comparable gas units, but installation cost can flip that advantage. Gas units require venting and a gas line connection, which adds $100 to $300 in labor compared to a straightforward electric swap. The all-in installed cost difference between gas and electric is usually modest: $500 to $1,400 for electric versus $700 to $1,800 for gas for a standard 40 to 50 gallon tank.

Use our water heater cost calculator to compare your specific options based on local energy rates and unit size.

Installed cost comparison

Fuel type and size	Unit cost	Installation	Total range
Electric, 40 gal	$300 to $700	$200 to $500	$500 to $1,200
Electric, 50 gal	$400 to $900	$200 to $500	$600 to $1,400
Gas, 40 gal	$400 to $900	$300 to $600	$700 to $1,500
Gas, 50 gal	$500 to $1,100	$300 to $700	$800 to $1,800
Electric tankless	$500 to $1,200	$300 to $800	$800 to $2,000
Gas tankless	$700 to $2,000	$500 to $1,500	$1,200 to $3,500

Annual operating costs

This is where the real difference shows up. Natural gas prices have historically been lower per BTU than electricity in most U.S. regions. The U.S. Department of Energy estimates a gas tank water heater costs $300 to $500 per year to operate, while an electric tank costs $400 to $700 per year, depending on local rates. Over a 10-year lifespan, that difference adds up to $1,000 to $2,000 in favor of gas in most markets.

However, in states where electricity is cheap or where you have solar panels, the electric advantage narrows considerably. Heat pump water heaters (a type of electric unit) are two to three times more efficient than standard electric resistance tanks, cutting electric operating costs to roughly $150 to $300 per year.

Availability and existing infrastructure

No gas service? Connecting a new gas line to a home that does not have one costs $500 to $2,000 or more, wiping out operating savings for years. Electric is the practical choice in this scenario.
Existing gas line? Gas is typically the smarter long-term choice if the infrastructure is already in place.
Electric panel capacity. A standard electric tank requires a dedicated 240-volt, 30-amp circuit. Older homes may need a panel upgrade, adding $500 to $1,500 to the project cost.

Recovery rate: how fast each type heats water

Gas heaters recover faster than electric. A standard 40 gallon gas unit recovers at 40 to 50 gallons per hour. A comparable electric unit recovers at 20 to 30 gallons per hour. For large households with high peak demand, the faster gas recovery is a practical advantage beyond just the cost comparison.

Environmental considerations

Electric water heaters are increasingly powered by renewable grid electricity, reducing carbon footprint over time. Several states are phasing out natural gas connections in new construction. If your long-term plan includes electrification or solar, an electric or heat pump unit may align better with your home trajectory. A licensed plumber can help you evaluate what makes sense for your specific setup.

Frequently asked questions

Which type is cheaper to run in 2025? In most U.S. markets, natural gas is cheaper per BTU than standard electricity, making gas tank heaters less expensive to operate annually. Heat pump electric models close or eliminate that gap in many regions.

Can I switch from gas to electric or vice versa? Yes, but switching fuel types adds cost. Converting to gas requires a gas line and proper venting. Converting to electric requires a dedicated 240-volt circuit. Budget $300 to $1,500 for conversion work beyond the unit and standard installation.

Does gas or electric have a longer lifespan? Both tank-style units last roughly 8 to 12 years. Tankless gas units tend to last 15 to 25 years with regular maintenance.

Bottom line

Gas costs more upfront and saves on operating costs over time. Electric costs less to buy but more to run in most markets. A heat pump electric unit offers the best long-term efficiency. Use our water heater cost calculator to compare total 10-year costs, and get quotes from a licensed plumber before deciding.

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