Water heater replacement cost by type and size
Prices below are all-in: equipment, labor, standard connections and disposal. The biggest factors are fuel type (gas or electric), tank size, and whether you’re switching technology, such as tank to tankless.
| Job | What's included | Typical market range | Fair price* |
|---|---|---|---|
| 40-gal gas tank | Standard-efficiency 40-gal atmospheric-vent gas tank, 6-yr warranty · Removal and haul-away of old unit · New gas flex connector, water connectors and T&P discharge line · Reconnect to existing venting, test for leaks and draft | $1,200–$2,900 | $1,900 |
| 50-gal gas tank | Standard-efficiency 50-gal atmospheric-vent gas tank, 6-yr warranty · Removal and haul-away of old unit · New gas flex connector, water connectors and T&P discharge line · Reconnect to existing venting, test for leaks and draft | $1,400–$2,900 | $2,100 |
| 40-gal electric tank | Standard 40-gal electric tank, 6-yr warranty · Removal and haul-away of old unit · New water connectors and T&P discharge line · Reconnect to existing 240V circuit | $1,000–$2,400 | $1,600 |
| 50-gal electric tank | Standard 50-gal electric tank, 6-yr warranty · Removal and haul-away of old unit · New water connectors and T&P discharge line · Reconnect to existing 240V circuit | $1,300–$2,800 | $1,800 |
| Tankless → new tankless (gas) | Condensing gas tankless unit, ~199k BTU · Remove old tankless unit · Isolation (service) valves if missing · Reuse existing venting and gas line | $3,000–$5,500 | $3,600 |
| Tank → tankless conversion (gas) | Condensing gas tankless unit, ~199k BTU · Remove and haul away old tank · New PVC venting and condensate drain · Isolation valves and mounting | $4,200–$8,000 | $5,200 |
| 50-gal heat pump (hybrid) | 50-gal heat pump water heater · Remove and haul away old tank · Condensate drain to existing drain · Reconnect to existing 240V circuit | $2,100–$5,500 | $3,700 |
*National base price before local adjustment and add-ons. Prices are current estimates while our provider network finalizes local pricing. Market ranges come from published contractor prices and national cost guides (sources). Updated October 2026.
Why prices vary from quote to quote
- Local labor rates. Plumber rates vary widely by metro area, so the same job can cost noticeably more in a high-cost city.
- Code upgrades. Many older installs are missing things current code requires, like an expansion tank, drain pan or seismic straps. Honest quotes list these separately, and so do we.
- Access. An attic or crawlspace install takes more time and often a second person.
- Permit fees. These are set by your city or county. Most charge a modest flat fee.
What’s included, and what costs extra
Most “surprise” charges on water heater jobs come from a short, predictable list. We list a fair price for each one, so you can spot padding in a quote.
| Add-on | When you need it | Fixed price |
|---|---|---|
| Permit & inspection | Required in most cities. Your pro pulls it. Big-city fees can run higher. | $150 |
| Thermal expansion tank | Needed if your home has a closed system (check valve or PRV on the main line). | $225 |
| Drain pan + drain line | Required when the heater sits above living space, e.g. attic or upstairs closet. | $140 |
| Seismic straps | Required in CA and some western states. | $125 |
| Vent pipe replacement | If the existing flue is rusted, undersized or not to code. | $450 |
| Gas line upsizing / new shutoff | Common for tankless conversions. Covers up to about 25 ft of new pipe. | $650 |
| New / upgraded electrical circuit | For heat pump water heaters or a larger AC breaker. Assumes your panel has room (no panel upgrade). | $600 |
| Attic / crawlspace / tight-closet access | Extra labor when the unit is hard to reach. | $375 |
| Same-day / after-hours service | Book for today, or evening and weekend slots. | $250 |
Ask your plumber which of these your home needs, and why. Code-required items are legitimate. Vague “miscellaneous” charges aren’t.
Gas water heater replacement
Gas water heaters are the most common type in the US, and a 40-gallon gas tank is the single most common replacement. A typical 40-gallon gas water heater replacement costs $1,900 and a 50-gallon costs $2,100, before any add-ons your home needs.
On a gas swap, a licensed pro:
- Shuts off gas and water, drains the old tank and disconnects it.
- Sets the new tank, adding seismic straps and a drain pan where required.
- Connects the water lines, a new gas flex connector, and the T&P relief valve discharge pipe.
- Reconnects the vent and checks for proper draft, so exhaust goes up the flue and not into your home.
- Fills the tank, lights it, leak-tests the gas connection and sets the temperature (120°F is a common, safe setting).
If the existing vent is rusted or undersized, or the gas line can’t supply the new unit, the fixed-price add-ons above apply. Switching from gas to electric, or the reverse, is a bigger job, and we price it separately.
Hiring a plumber for water heater replacement
Water heater replacement is plumbing work, and in most places it’s also gas and permit work. That’s why most homeowners hire a licensed plumber. A good one will:
- Pull the permit (required in most cities) and schedule the inspection.
- Bring the install up to current code rather than copying old mistakes.
- Register the manufacturer warranty and stand behind their labor.
Before you hire, check the license on your state’s lookup site, get an itemized written quote that includes the permit and haul-away, and ask what the warranty covers on labor.
State requirements differ. In Texas, for example, a licensed plumber must pull the permit.
Same-day water heater replacement
No hot water is an emergency for most households. Standard 40- and 50-gallon gas and electric tanks are stocked by most local pros, so same-day replacement is often possible if you book by early afternoon. Same-day or after-hours service usually adds about $250. Tankless and heat pump units are usually special-order and take longer.
While you wait: if the tank is leaking, shut the cold-water valve above the heater and turn the gas control to “Off” (or switch off the breaker for an electric unit).
Water heater repair or replacement?
Many “dead” water heaters just need a cheap part. Use this table to decide.
| Symptom | Likely cause | Usually | Pro price |
|---|---|---|---|
| Gas pilot won’t stay lit | Thermocouple or thermopile | Repair | $215 |
| No heat, pilot lights, burner won’t fire | Gas control valve | Repair if under ~8 years old | $450 |
| Water dripping from the side pipe | T&P relief valve or high pressure | Repair | $225 |
| Rotten-egg smell, rusty water | Worn anode rod | Repair | $275 |
| Drip from the drain spigot | Drain valve | Repair | $225 |
| Water pooling under the tank, leak from the tank body | Corroded tank | Replace | from $1,600 |
| Tank 10–12+ years old, any major repair | End of service life | Replace | from $1,600 |
A useful rule of thumb is the 50% rule. If the heater is past the middle of its expected life and the repair costs more than half the price of a new unit, replace it. Not sure how old yours is? Use our water heater age lookup, or run the numbers with the repair or replace calculator.
Parts of a water heater
Most repairs involve one of a handful of parts. Here’s where each one sits on a typical gas tank heater. Tap a part to open its repair guide.
DIY fixes to try first
If you’re handy, several water heater fixes are realistic weekend projects with basic tools. Our step-by-step guides cover tools, parts, safety stop-points, and when to call a pro instead:
Extends tank life and fixes smelly water. About 1 hour.T&P relief valve
Stops a leaking relief valve. About 1 hour.Thermocouple
Fixes a pilot that won’t stay lit. 30–60 minutes.Drain valve
Stops a dripping drain spigot. About 1–2 hours.Gas control valve
Diagnosis tips. Replacement is best left to a pro.
How to get a fair water heater quote
- Know your heater. Fuel type, gallons and location are on the label and in the photos above. Tell every plumber the same thing.
- Get 2–3 itemized, written quotes. Each should list the heater (brand, size, warranty), labor, permit, haul-away and any code upgrades.
- Compare line by line with the prices on this page. Quotes within the typical range are fair. Ask about anything well above it.
- Watch for red flags: no permit, cash-only discounts, “today only” pricing, or a quote that won’t say what brand you’re getting.
Water heater rebates and incentives in 2026
The federal 25C energy-efficiency tax credit, which covered heat pump water heaters, ended for equipment placed in service after December 31, 2025. What’s still available:
- State HEAR rebates. These are income-qualified point-of-sale rebates for heat pump water heaters, available only in states that have launched their programs, while funds last.
- Utility rebates. Many electric and gas utilities offer rebates on efficient water heaters. Check your utility’s website.
Learn more about water heater efficiency at Energy Saver (DOE) and ENERGY STAR.
Frequently asked questions
How much does it cost to replace a water heater?
Most standard tank replacements cost $1,600–$2,100 installed, including haul-away. Tankless conversions and heat pump units cost more. Code-required add-ons such as an expansion tank, drain pan or permit are priced separately at fixed rates.
Do I need a plumber to replace a water heater?
In most US cities, yes. Water heater replacement usually requires a permit, and many states (Texas, for example) require a licensed plumber to pull it. Gas units also involve gas connections and venting that must pass inspection. Always confirm your plumber is licensed for gas work where you live.
How long does a water heater replacement take?
A like-for-like tank swap typically takes 2–4 hours. A tank-to-tankless conversion usually takes most of a day because of new venting, gas line and mounting work.
Can I get a water heater replaced the same day?
Often, yes, for standard 40- and 50-gallon tanks, which pros keep in stock. Expect to pay about $250 extra for same-day or after-hours service. Availability depends on your area and the time of day you call.
Is it cheaper to repair or replace a water heater?
Repair is cheaper when the tank itself is sound: a failed thermocouple, gas valve, T&P valve or anode rod. If the tank is leaking from the body, or the heater is past about 10–12 years old and the repair costs more than half the price of a new unit, replacement is usually the better value.
What size water heater do I need?
Most homes replace like-for-like. As a rough guide, a 40-gallon tank suits 1–3 people and a 50-gallon tank suits 3–5. Your current size is printed on the label on the side of the tank. For a precise answer, use our water heater size calculator.
Are there tax credits for a new water heater in 2026?
The federal 25C tax credit for heat pump water heaters ended for equipment installed after December 31, 2025. Some states offer income-qualified rebates under the federal HEAR program, and many utilities offer their own rebates. Check your state energy office and your utility.