Loan Water Heater Cost Estimator
Water heaters fail on the worst possible schedule, and the replacement quote arrives while you are cold. Know the bands before the plumber does: pick the type and size — get the installed range, with the fuel-switch extras named before they surprise you.
Bands assume a like-for-like swap in the same location on the same fuel. Switching fuel, moving the heater, or upsizing a gas line or electrical service adds real work priced separately — see the notes.
How it works
Installed replacement bands at 50 gallons: tank gas $1,400–$2,400; tank electric $1,300–$2,200; tankless gas $2,800–$4,500; tankless electric $2,000–$3,400; heat-pump hybrid $2,600–$4,200. Tank size scales tank models mildly (factor 0.9 + size/500: a 40-gal prices at 0.98×, a 75-gal at 1.05×) because the labour is the same swap. The unit itself is often under half the invoice — permits, pans, expansion tanks, venting compliance and haul-away are the rest.
Method & worked example
Method: Installed range = type band at 50 gal (tank gas $1,400–2,400; tank electric $1,300–2,200; tankless gas $2,800–4,500; tankless electric $2,000–3,400; heat-pump hybrid $2,600–4,200) × size factor (0.9 + size ÷ 500 for tank models; tankless unscaled).
Worked example: A 50-gallon gas tank swap: factor 1.00, so $1,400–$2,400 installed, mid-band $1,900.
When to use this
- Your water heater failed and the plumber is quoting from the driveway.
- You are planning a proactive replacement at year 10–12.
- You are weighing tankless conversion costs against a like-for-like swap.
How to use it, step by step
- Pick the heater type — the one being installed, not removed.
- For tank models, pick the size; tankless ignores size here.
- Read the installed range for a prepared, same-location swap.
- If fuel or location changes, expect additions above the band and ask for them itemised.
What the inputs mean
| Input | What it is | Typical values |
|---|---|---|
| Heater type | Technology and fuel | Tank gas $1,400–2,400; tankless gas $2,800–4,500; heat-pump $2,600–4,200 |
| Tank size | Gallons for tank models | 40 gal 2–3 people; 50 gal standard; 75 gal large homes |
Another worked example
A tankless gas installation in a prepared location: $2,800–$4,500, mid-band $3,650 — roughly double the mid-band of the 50-gal tank swap ($1,900). The premium buys endless hot water and a 20-year service life; decide on those merits, since energy payback alone rarely closes the gap.
Frequently asked questions
How much does it cost to replace a 50-gallon gas water heater?
$1,400–$2,400 installed, mid-band about $1,900. Emergency weekend pricing pushes toward the top of the band — the same swap scheduled on a Tuesday sits nearer the middle.
How much is a tankless gas water heater installed?
$2,800–$4,500. The unit's endless-hot-water and 20-year life case is real; the payback against a tank at typical gas prices is long, so buy it for the shower, the space, or the lifespan — not as a savings plan.
Tank or tankless?
Tank: cheapest installed, simple, a known quantity of standby loss. Tankless: endless supply, compact, higher install cost and maintenance (descaling) needs. Heat-pump hybrid: the efficiency champion where it fits — it cools and dehumidifies its room as a side effect.
What size tank do I need?
Forty gallons serves 2–3 people, 50 serves 3–4, 75 serves large families or soaking tubs. First-hour rating matters more than the sticker gallons — a high-recovery 40 can out-shower a cheap 50.
Why did my quote include an expansion tank and pan?
Because modern codes and closed plumbing systems require them: the expansion tank protects the heater and fixtures from thermal pressure, the pan protects the floor from the inevitable. A quote omitting them is not cheaper — it is unfinished.
🚿 What does your hot water habit cost monthly?
Heater priced, the Water Bill Estimator builds the monthly water + sewer bill fixture by fixture — showers are usually the biggest line, and now you know their temperature source too.
How long do water heaters last?
Tank models 8–12 years (anode rod maintenance stretches it); tankless 15–20 with descaling; heat-pump hybrids 10–15. Past year 10 on a tank, proactive replacement beats the flood schedule.
What are the signs replacement is near?
Rusty water, rumbling (sediment), lukewarm output at the same setting, and any moisture at the base. A leaking tank never heals — it graduates.