Water Heater Replacement Cost
Estimate the cost to replace your water heater by type — gas or electric tank, tankless, or heat-pump (hybrid) — scaled to your household size and install complexity, with current rebate and efficiency guidance.
Water heater finally gave out? Pick the type and fuel, your household size, and whether it's a simple swap or a more involved install. You'll get an installed cost range — equipment plus labor — to size up the bill and compare contractor quotes.
Water heater type
The unit type and fuel — the biggest cost driver. A standard tank is cheapest; tankless and heat-pump (hybrid) units cost more up front but run more efficiently.
Household size
Bigger households need a larger tank or higher-capacity unit, which costs more. Roughly: 1–2 people = small (≈40 gal), 3–4 = medium (≈50 gal), 5+ = large (≈80 gal / high-demand).
Installation
A simple swap replaces the same type in the same spot. A complex install — relocating the unit, new venting or a gas line, switching fuel types, or code upgrades — adds cost.
Estimated Installed Cost
$1,200 – $2,500
Tank — Gas · medium home
A standard tank is the cheapest, simplest replacement
A standard gas tank is the budget choice and the easiest like-for-like swap, lasting about 8–12 years. It's hard to beat on upfront cost. If you want lower bills or endless hot water down the road, a tankless gas unit is the upgrade — but for a straight replacement on a tight timeline (a dead heater), a new tank is usually the fastest, cheapest fix.
Figures are installed cost — equipment plus standard labor — for the type and household size you chose; the complex option adds typical costs for relocation, new venting or gas line, fuel conversion, or code upgrades. Actual prices vary with brand and efficiency tier, local labor rates, permits, and what your existing setup needs (an expansion tank, new shutoffs, drain pan, or electrical/gas work). Rebate and tax-credit amounts change over time and by location — confirm current offers before counting on them. This is a planning range, not a quote; get a few local bids.
💡About this calculator▼
When a water heater dies, you usually find out the hard way — a cold shower or a puddle in the basement — and then you're making a fast, expensive decision. This calculator gives you the number you need to make it well: a realistic installed cost for each type of replacement, so you can weigh a quick like-for-like swap against an upgrade without guessing.
The single biggest factor is what kind of unit you put in. A standard gas or electric tank is the cheapest and fastest replacement; a tankless unit costs more to install but runs longer and never runs out of hot water; a heat-pump (hybrid) model costs more up front but slashes energy use and can qualify for sizable rebates. Pick the type, set your household size, and tell it whether the install is a simple swap or something more involved.
It's an installed estimate — equipment plus labor — not just the price of the box at the store. And where it matters, it points you to the efficiency and rebate angles (especially for heat-pump units), so a forced replacement can become a chance to cut your energy bill rather than just restore hot water.
The estimate starts from a base installed cost for the type you choose, then scales it for household size and adds for a complex install.
First, the type and fuel set the base range — installed, meaning equipment plus standard labor. Standard tanks are the lowest; tankless (especially gas) and heat-pump units are higher. This is the dominant driver, which is why it's the first thing you pick.
Then household size scales that base. A bigger household needs a larger tank or a higher-capacity unit, which costs more, so a large home runs above the baseline and a small home below it. It's a proportional adjustment on the equipment-and-labor figure.
Finally, the installation choice handles the wild card. A simple swap — same type, same location — keeps the base cost. A complex install adds a separate range to cover relocation, new venting or a gas line, switching fuel types, or bringing things up to code. The base ranges and a worked example are below.
📐How it's calculated▼
It's a base installed cost, scaled by household size, plus optional complex-install costs.
Step 1 — Base installed cost (by type): Tank — gas: $1,200–$2,500 · Tank — electric: $1,000–$2,200 Tankless — gas: $3,000–$5,500 · Tankless — electric: $1,800–$3,500 Heat pump (hybrid): $2,500–$4,500
Step 2 — Scale for household size: Small (×0.85) · Medium (×1.0) · Large (×1.25)
Step 3 — Add complex install (if applicable): Relocation / new venting / gas line / code: + $800–$2,500
Total = (base × size factor) + complex extras
Example: A heat-pump unit, large household, complex install
→ Base: $2,500–$4,500
→ Scaled (×1.25): about $3,150–$5,650
→ Complex extras: + $800–$2,500
→ Total: about $3,950–$8,150
Before incentives — utility and state rebates on heat-pump units are often substantial (and a federal tax credit may apply if one is currently in effect), so the net cost can come down significantly. Check what's available in your area.
📎Source: Industry installed-cost data, ENERGY STAR & DOE efficiency guidance
🔍Finding your inputs▼
Water heater type: The unit and its fuel — the biggest cost lever. Tank (gas or electric) is the conventional, lowest-cost choice and the easiest like-for-like replacement. Tankless (gas or electric) heats water on demand with no tank — endless hot water and a longer lifespan, but a pricier install, particularly gas. Heat pump (hybrid) is an electric unit that moves heat instead of generating it; it's the most efficient and rebate-friendly option, but needs space and surrounding air to work. Match the fuel to what you already have unless you're intentionally converting (which makes it a complex install).
Household size: A proxy for the capacity you need, which scales the cost. Roughly, 1–2 people is small (around a 40-gallon tank or a smaller-capacity unit), 3–4 is medium (around 50 gallons), and 5+ is large (around 80 gallons or a high-demand unit). If your old heater always kept up, match its size; if you regularly ran out of hot water, size up a notch.
Installation: Choose Simple swap if the new unit is the same type going in the same spot — the common case, and the cheapest. Choose Complex install if the job involves moving the heater, adding or changing venting, running or upsizing a gas line, switching fuel types (e.g., electric tank to gas, or tank to heat pump), or code-required upgrades. Conversions and relocations always fall here.
⚠️Special situations▼
My water heater just died and I need it replaced today
On a true emergency timeline, a like-for-like tank swap is almost always the fastest and cheapest route — the unit is in stock everywhere and any plumber can install it same-day. Tankless and heat-pump upgrades take more planning (venting, gas, electrical, sometimes permits and rebate paperwork), so they're hard to pull off in an emergency. If you can limp along a few days (turn off the supply and power to a leaking unit), it's worth getting a heat-pump quote, since the long-term savings and rebates can be substantial. If you truly can't wait, replace with a tank now and plan the efficient upgrade for next time.
Is a heat pump water heater worth the higher price?
For most electric households, increasingly yes. A heat-pump (hybrid) unit uses 2–4× less energy than a standard electric tank, often saving a few hundred dollars a year, and many utilities and states offer rebates on these units — sometimes substantial — that can bring the net price close to a standard unit (a federal tax credit may also apply if one is currently in effect, so check before you count on it). The caveats: it needs a fair amount of surrounding air and space (it cools and dehumidifies the room it's in, so a basement or garage is ideal, a small closet is not), it's a bit slower to recover, and the savings shrink if your electricity is cheap or you don't claim the incentives. If you're on gas, the calculus is different — compare against a gas tank.
Should I switch from a tank to tankless?
Switch for the benefits, not to save money fast. Tankless gives you endless hot water, frees up floor space, and lasts roughly 20 years versus 8–12 for a tank. But converting from a tank usually means new venting and often a larger gas line or electrical upgrade — that's a complex install, and it's why the upfront cost is higher. The energy savings are real but modest, so payback on the premium can take many years. If you value the endless hot water and longevity and plan to stay in the home, it's a satisfying upgrade; if you just need hot water restored cheaply, a tank is the better value.
Why is the gas tankless option so much more expensive?
It's the install, not just the unit. A gas tankless heater fires at very high output on demand, which usually requires dedicated stainless-steel or PVC venting and frequently a larger-diameter gas line to feed it — work a simple tank swap doesn't need. Add in possible condensate drainage and electrical for the controls, and the labor climbs. The unit itself costs more than a tank too, but the venting and gas-line work is what really separates gas tankless from the other options. If your home was already set up for a high-output gas appliance, the gap narrows.
What's not included in this estimate?
Several things that can appear on a real invoice: permits and inspection fees, an expansion tank (required by many codes when there's a backflow preventer), a new drain pan, upgraded shutoff valves or flexible connectors, electrical panel work for a heat pump or electric conversion, and disposal of the old unit if the plumber charges separately. It also doesn't include water-quality add-ons like a softener or filter, or repairs to surrounding plumbing discovered during the job. Treat the result as the core replacement cost and leave a cushion for code-required extras — and always get an itemized quote.
❓Common questions▼
How much does it cost to replace a water heater?
Installed, a standard tank typically runs about $1,000–$2,500 for electric and $1,200–$2,500 for gas; a tankless unit runs roughly $1,800–$3,500 electric or $3,000–$5,500 gas; and a heat-pump (hybrid) unit runs about $2,500–$4,500 before rebates. Larger households and complex installs (relocation, new venting or gas line, code upgrades) push those higher — a complex job can add $800–$2,500. The calculator above estimates your range by type, household size, and install. Always get local quotes, and check current rebates if you're considering a heat pump.
Is it cheaper to repair or replace a water heater?
It depends on the age and the problem. For a tank near or past its typical 8–12 year lifespan, replacement is usually the better call — sinking money into a repair on an old unit often just delays an inevitable failure, sometimes a messy one. Minor fixes (a thermocouple, heating element, or thermostat) on a relatively young unit are worth doing. But a leaking tank can't be repaired — the tank itself has failed, and it needs replacing. As a rule of thumb, if the unit is more than about 8 years old or the repair approaches half the cost of a new one, replace it.
How long does a water heater last?
A conventional tank water heater typically lasts about 8–12 years; tankless units often last around 20 years with maintenance. Lifespan depends heavily on water hardness, maintenance (flushing the tank, replacing the anode rod), and usage. Warning signs that replacement is near include rusty or discolored hot water, rumbling or popping noises from sediment, water pooling around the base, or simply running out of hot water faster than it used to. If your heater is past 10 years and showing any of these, it's wise to budget for a replacement before it fails on its own schedule.
Do heat pump water heaters qualify for tax credits or rebates?
Often yes, especially through rebates. Many utilities and state energy programs offer rebates on heat-pump (hybrid) water heaters — sometimes several hundred dollars or more — because they're among the most efficient upgrades available. A federal tax credit has also been available for these units at times, but federal incentive programs change and the rules have shifted recently, so don't assume a specific federal amount — confirm what's currently in effect before you buy. The practical move: check your utility's rebate program and your state energy office first, then look up the current federal credit status. Keep your receipts and the unit's efficiency documentation in case you can claim anything.
What size water heater do I need?
For tanks, size by household: roughly a 40-gallon tank for 1–2 people, 50 gallons for 3–4, and 80 gallons (or a high-recovery unit) for 5 or more. If your old tank always kept up, matching its size is a safe bet; if you regularly ran out, size up. Tankless units are rated by flow (gallons per minute) rather than capacity, so you size them to your peak simultaneous demand — for example, running two showers at once — and your climate, since incoming water temperature affects output. The calculator's household-size setting approximates this for estimating; a plumber will confirm the exact sizing.