Will a heat pump water heater pay for itself?
Annual savings and simple payback from your fuel, your rates, and cited installed costs. The federal 25C credit expired at the end of 2025, so this calculator never counts it. Rebates that still exist are handled separately, where they belong.
Uses the $3,600–$4,800 installed band for replacing an electric tank
Before rebates. State and utility rebates change this math, sometimes by years.
Assumptions behind the math
Heat pump water heater UEF 3.0–3.8; electric resistance tank UEF 0.90; gas and propane storage tanks around 0.60; oil-fired around 0.55. Hot water use of 38, 55, or 84 gallons per day for 1–2, 3–4, and 5+ person households (the DOE test-procedure draw bins), heated 67°F above inlet temperature. Efficiency and hot-water-use constants are stated assumptions, not yet part of our verified research corpus. Fuel price defaults are EIA figures: electricity by region (April 2026), natural gas $1.35–$1.57/therm heating-season band (default is the midpoint), propane $2.674/gal and heating oil $5.535/gal (final weekly readings of the 2025–26 season, March 30, 2026). Installed costs come from Rewiring America's published bands.
Assumptions: HPWH UEF 3.0–3.8; current tank UEF 0.90 electric, 0.60 gas or propane, and 0.55 oil; DOE draw-bin hot water use; a 67°F temperature rise; cited EIA fuel prices; and cited installed-cost bands.
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Rebates change the payback math. The matcher finds what your state still offers.
What's next
Moving heat beats making it
A resistance element turns one unit of electricity into one unit of heat. A heat pump moves three or more units of heat with the same electricity.
That ratio is why the win is biggest when you replace an electric resistance tank: same fuel, roughly a third of the consumption. Propane and oil water heating are expensive per unit of heat, so those swaps usually pencil out well too. Natural gas is the honest exception. At low gas rates and high electricity rates, the annual savings can be thin or even negative, and no calculator should hide that. Run your actual rates above and trust the result.
A water heater swap is also one of the easiest first moves in a larger project. See what order to do a retrofit in and where water heating fits in a whole-home electrification plan.
What a heat pump water heater costs installed
Two published sources agree on the center of gravity. What you are replacing matters more than the brand on the box.
| Scenario | Installed cost | Why |
|---|---|---|
| Replacing an electric tank | $3,600–$4,800 | 240V circuit already exists; often a same-spot swap |
| Replacing gas (or propane/oil) | $4,300–$6,500 | Usually needs a new 240V circuit; that is most of the premium |
| Equipment alone | $1,200–$2,500 | 50-gallon standard to 80-gallon premium units |
Bands from Rewiring America (accessed July 2026). Angi's marketplace data cross-checks it: $4,200 average, $2,800–$8,000 observed range.
The low end is a straightforward electric swap: same location, adequate space, a floor drain nearby, and an existing 240V circuit. The high end comes from a gas conversion (new circuit), a condensate pump where there is no drain, ducting kits for confined spaces, 80-gallon tanks for big households, and high-labor metro markets. When you are ready for real numbers, get quotes from heat pump water heater installers and compare them against these bands.
The federal credit is gone. Rebates are not.
A lot of payback calculators still bake in a tax credit that no longer exists. Here is the actual state of play.
The federal 25C credit, which was worth up to $2,000 on a heat pump water heater, expired for anything placed in service after December 31, 2025. If a calculator or a contractor quote still counts it, the payback math is wrong by years. This page never includes it.
What remains is real money. In states where the federal HEAR program has launched, income-eligible households can get up to $1,750 toward a heat pump water heater, but most states have not launched yet, so confirm your state's status before counting on it. State and utility efficiency rebates continue regardless of federal programs, and in strong-program states they meaningfully shorten the payback above. The Rebate Matcher is the accurate path to what your state offers right now, and once the tank is in, here is how to actually collect the rebates.
Placement and practical trade-offs
Heat pump water heaters are quiet wins for most homes, but they have real requirements. Knowing them up front avoids the bad-install stories.
Cool exhaust air
The unit pulls heat out of the room around it and exhausts cool, dry air. In an unheated basement or garage that is free. Inside heated living space, part of your "savings" is quietly billed to the heating system in winter.
Noise
There is a compressor and a fan, roughly dehumidifier-level sound while running. A basement or garage install is a non-issue. A closet next to a bedroom deserves more thought, or a ducted setup.
Space and drainage
Most units want around 700 cubic feet of surrounding air and a place to send condensate. Tight closets need a ducting kit; no nearby drain means a condensate pump. Both are solvable, both are line items.
Recovery speed
Heat pump mode reheats a tank more slowly than a gas burner. Big households handle this with a larger tank (65–80 gallons) or hybrid mode, which adds resistance heat during heavy draws and costs some efficiency when it kicks in.
Heat pump water heater payback questions
How long does a heat pump water heater take to pay for itself?
It depends on what you are replacing. Swapping an electric resistance tank, a 3 to 4 person household paying the national average electricity rate (18.83 cents per kWh, April 2026 EIA) saves roughly $480 to $530 a year, which pays back a $3,600 to $4,800 installed cost in about 7 to 10 years before rebates. Replacing natural gas takes far longer at average rates. State and utility rebates can cut years off either number.
Do heat pump water heaters really save money?
Yes when replacing electric resistance, propane, or oil water heating. A heat pump water heater moves roughly three or more units of heat for every unit of electricity it buys, where a resistance tank gets less than one. The weakest case is cheap natural gas paired with expensive electricity, where annual savings can be small or zero. Run your own rates through the calculator; the result is honest either way.
How much does a heat pump water heater save per year?
For a 3 to 4 person household replacing an electric resistance tank at the national average electricity rate (18.83 cents per kWh, April 2026 EIA), roughly $480 to $530 a year. Larger households and higher electricity prices raise the number. Replacing natural gas at average prices saves far less, often under $150 a year. Replacing propane or oil usually lands in between.
Is a heat pump water heater worth it if I have gas?
Sometimes, but check the math honestly. At the national average heating season gas price of roughly $1.35 to $1.57 per therm and average electricity prices, annual savings are modest, and payback on the $4,300 to $6,500 gas swap cost can stretch past the life of the tank. The case improves with cheap electricity, expensive gas, a plan to drop the gas line entirely, or rebates that cut the upfront cost.
Do heat pump water heaters work in a cold basement?
Yes, within limits. Most units are rated to operate in spaces down to roughly 37 to 40 degrees F and want about 700 cubic feet of surrounding air, or a ducting kit in tighter spaces. A basement that stays above 50 degrees F is the common happy path. The unit cools the room a few degrees as it runs, which is free dehumidification in summer and a small tax on your heating system in winter.
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