A compiled reference of 38 verified statistics on water heaters in rental property, spanning what replacement and repair cost, how tank and tankless units compare on price, lifespan and warranty, the insurance-claim analysis of how water heaters actually fail and at what age, and what a failure costs in water damage beyond the unit. Every figure is drawn from a named public source, including Angi, the Insurance Institute for Business and Home Safety as reported in a US Department of Energy national laboratory study, and the US Census Bureau's American Housing Survey, and independently checked against the original before publishing.
Key statistics
6 highlights from this report
Key statistics
Key takeaways
Two independent sources land on the same number. Angi's pricing guide puts the average water heater lifespan at about 11 years; the insurance industry's claims analysis puts the average age at failure at 10.7. That is the whole page in one coincidence: a water heater does not gently reach the end of its life, it fails, and 69 percent of the time it fails by leaking. The unit is $1,346 to replace. The leak it causes is $4,444 to clean up. Replacing on schedule is cheaper than replacing after the flood.
Water heaters fail at 10.7 years on average, in a range of 1 to 30 years
69% of water heater insurance claims are a leaking or burst tank
A water heater failure costs $4,444 in water damage on average, after the deductible
Water heater replacement costs $1,346 on average, in a normal range of $881 to $1,826
Water heaters last about 11 years on average, in a range of 6 to 15
Tankless costs $1,400 to $3,900 and lasts up to 20 years; a gas tank costs $600 to $2,500 and lasts 6 to 12
How water heaters fail
The insurance industry has looked directly at this. According to the Insurance Institute for Business and Home Safety (ibhs.org), whose analysis of 700 water-heater-related water loss claims is reported in a US Department of Energy technical study by Pacific Northwest National Laboratory (pnnl.gov), the failures broke down as:
- 69% Leak in the water heater or burst tank
- 13% Valve malfunction
- 10% Supply line failure
- 7% Unknown
- 1% Other
Source: Insurance Institute for Business and Home Safety analysis of 700 water heater water-loss claims, as reported by Pacific Northwest National Laboratory for the US Department of Energy.
How we built this report
Every figure below was compiled in August 2026 from named public sources and checked against the original document before publishing.
- Compiled from primary sources
Three published contractor pricing guides from the same publisher for comparable pricing, an insurance-industry claims analysis as reported verbatim in a US Department of Energy national laboratory technical report, and federal housing survey data.
- Only explicitly stated figures
We include only numbers a named source states directly, and attribute each one inline where it appears. Where we do arithmetic on top of a cited figure it is labelled as a worked example with the inputs shown.
- Vintage stated
The insurance claims analysis dates from 2007 and is the most-cited failure study for this equipment; the pricing guides were updated July and August 2026; the housing survey is 2023. Each is labelled. A widely repeated secondhand claim that three in four heaters fail by age 12 could not be traced to the primary study and is not used.
- Independent review
Written by one co-founder, reviewed by the other before publishing.
Scope caveat: contractor cost figures are guide-level national ranges, not an audited survey. The claims analysis covers insured US homes broadly; short-term rentals are not separately identified. General plumbing repair pricing is covered in our plumbing repair reference and insurance-claim averages and leak-detection devices in our water leak detection research; neither is repeated here.
Water heaters, by the numbers
All 38 figures, grouped by theme, each from a named public source and independently verified against the original.
What replacement costs
According to Angi (angi.com), whose water heater replacement guide was updated in July 2026, replacing a water heater costs $1,346 on average, in a normal range of $881 to $1,826, with a low of $350 and a high of $12,000. A conventional tank-style unit runs $600 to $2,500 depending on tank size, and about 90 percent of households have one. A tankless unit costs $1,400 to $3,900 to replace. Converting from tank to tankless costs more in labor because the job can take twice as long and involve replumbing.
Statistic 1
Water heater replacement costs $1,346 on average, with a low of $350 and a high of $12,000.
Angi (2026)
Statistic 2
The normal range for water heater replacement is $881 to $1,826.
Angi (2026)
Statistic 3
A tank-style water heater costs $600 to $2,500 to replace, depending on tank size.
Angi (2026)
Statistic 4
A tankless water heater costs $1,400 to $3,900 to replace.
Angi (2026)
Statistic 5
About 90 percent of households have a tank-style water heater.
Angi (2026)
Statistic 6
Tank water heaters hold 20 to 100 gallons; a tankless unit is the size of a small suitcase and wall-mounted.
Angi (2026)
Statistic 7
Converting a tank system to tankless costs significantly more in labor; the job can take twice as long and include replumbing.
Angi (2026)
Statistic 8
Water heater installation costs $800 to $2,000 as a plumbing line item.
Angi plumbing cost guide (2026)
Statistic 9
Permits, gas line work, electrical upgrades and old-unit removal are additional to the replacement price.
Angi (2026)
Worked example
At Angi's $1,346 average and its 11-year average lifespan, a water heater costs about $122 a year to own before repairs, per RapidEye Research. On a 15-unit portfolio that is roughly 1.4 replacements a year at the average, or about $1,835 a year in scheduled replacement, if every unit is replaced on time.
What this means: the replacement is a known, budgetable number, and the tank-versus-tankless choice is a lifespan trade more than a price one. What turns a $1,346 line item into a much larger one is timing, which is what the failure data below is about.
What repair costs
According to Angi (angi.com), whose water heater repair guide was updated in August 2026, repair costs $615 on average, in a normal range of $228 to $1,017, with a low of $90 and a high of $1,800. Repairing a tank heater runs $100 to $500; repairing a tankless unit $100 to $1,300, and tankless repairs average $600. The parts are cheap, an anode rod $25 to $75, a heating element $15 to $60, a gas valve $70 to $200, a thermostat $20 to $400; labor is most of the bill. Angi is blunt about the one repair that is not a repair: if there is water in the pan or under the unit, the tank has usually corroded and needs replacing at $850 to $1,800.
Statistic 10
Water heater repair costs $615 on average, with a low of $90 and a high of $1,800.
Angi (2026)
Statistic 11
The normal range for water heater repair is $228 to $1,017.
Angi (2026)
Statistic 12
Repairing a tank heater costs $100 to $500; repairing a tankless heater $100 to $1,300.
Angi (2026)
Statistic 13
Tankless repairs average $600 and reach $1,300 for units in very poor condition; a heat exchanger repair runs $500 to $1,300.
Angi (2026)
Statistic 14
By part: an anode rod costs $25 to $75, a dip tube $25, a gas burner $175, a gas valve $70 to $200, a heating element $15 to $60, a thermostat $20 to $400, before labor.
Angi (2026)
Statistic 15
Water in the pan or under the unit usually means a corroded tank that cannot be repaired, requiring replacement at $850 to $1,800.
Angi (2026)
Statistic 16
Water heater repair costs $150 to $750 as a plumbing line item; an emergency water heater repair $225 to $975.
Angi plumbing and emergency plumber cost guides (2026)
Statistic 17
Tankless descaling costs $150 to $350; sensor or thermostat repairs $150 to $400; ignition or burner repairs $200 to $800.
Angi (2026)
What this means: the repair-or-replace decision on a water heater is unusually clean. Small parts are cheap and worth fixing; a wet pan is not a repair. The one preventive part, the sacrificial anode rod at $25 to $75, is also the part whose deterioration the failure data below identifies as the usual reason tanks corrode and leak.
How long they last
According to Angi (angi.com), most water heaters last 6 to 15 years, with an average lifespan of about 11 years. Conventional tank units last 6 to 12 years, electric tank units 10 to 15 and gas tank units 6 to 12; tankless units often last up to 20. Tank heaters carry warranties of 6, 9 or 12 years, which Angi calls a good indicator of what to expect, and tankless warranties run 10 to 12. Heavy usage, larger households, hard water and undersized units all shorten the life; annual flushing and anode rod checks extend it.
Statistic 18
Most water heaters last 6 to 15 years, with an average lifespan of about 11 years.
Angi (2026)
Statistic 19
Conventional tank water heaters last 6 to 12 years.
Angi (2026)
Statistic 20
Electric tank heaters last 10 to 15 years; gas tank heaters 6 to 12.
Angi (2026)
Statistic 21
Tankless water heaters often last up to 20 years; some high-efficiency and tankless models exceed 20.
Angi (2026)
Statistic 22
Tank water heaters carry warranties of 6, 9 or 12 years, a good indicator of expected life; warranties overall run 3 to 12 years.
Angi (2026)
Statistic 23
Tankless models often carry longer warranties of 10 to 12 years.
Angi (2026)
Statistic 24
Heavier usage, larger households, hard water and undersized units all shorten a water heater's life; an undersized unit works twice as hard.
Angi (2026)
Statistic 25
Flushing the tank yearly and checking the anode rod extend the unit's life by preventing rust and corrosion.
Angi (2026)
Statistic 26
A tankless unit's 20-year lifespan can offset its higher upfront cost through energy savings.
Angi (2026)
Worked example
A $600 to $2,500 gas tank at Angi's 6 to 12 years is $50 to $417 a year; a $1,400 to $3,900 tankless at 20 years is $70 to $195 a year, per RapidEye Research. On lifespan alone the tankless premium roughly pays for itself, before the energy savings Angi cites, and before the fact that a rental's usage profile, many occupants and constant turnover, sits at the heavy-use end that shortens tank life.
What this means: the warranty is the operator's planning number. A 6-year tank warranty in a high-turnover unit is a replacement date, not a guarantee, and Angi's own list of what shortens life, heavy use, large households, hard water, reads like a description of a short-term rental.
How and when they fail
This is the part the pricing guides cannot tell you. According to the Insurance Institute for Business and Home Safety (ibhs.org), whose analysis of 700 water-heater-related water loss claims is reported by Pacific Northwest National Laboratory (pnnl.gov) in a US Department of Energy technical study, 69 percent of failures were a leak in the water heater or the tank bursting, 13 percent a valve malfunction, 10 percent a supply line failure, 7 percent unknown and 1 percent other. The average age at failure was 10.7 years but ranged from 1 to 30, and water heater failures rank among the top five causes of water loss claims. Tanks most often leak, the report notes, because the sacrificial anode rod deteriorates and the tank corrodes, and most homeowners do not know the rod exists.
Statistic 27
The average age of a water heater at failure is 10.7 years, ranging from 1 to 30 years.
Insurance Institute for Business and Home Safety, 700-claim analysis (2007), via Pacific Northwest National Laboratory
Statistic 28
69 percent of water-heater-related water loss claims were due to a leak in the water heater or the tank bursting.
Insurance Institute for Business and Home Safety (2007), via Pacific Northwest National Laboratory
Statistic 29
13 percent of claims were a valve malfunction, 10 percent a supply line failure, 7 percent unknown and 1 percent other.
Insurance Institute for Business and Home Safety (2007), via Pacific Northwest National Laboratory
Statistic 30
Water heater failures are one of the top five water loss claim causes, where compensation is sought for water damage to furniture, equipment or the home.
Insurance Institute for Business and Home Safety (2007), via Pacific Northwest National Laboratory
Statistic 31
The analysis covered 700 water-heater-related water loss claims.
Insurance Institute for Business and Home Safety (2007), via Pacific Northwest National Laboratory
Statistic 32
Tanks most often leak because the sacrificial anode rod deteriorates and the tank then corrodes.
Pacific Northwest National Laboratory for the US Department of Energy (2013)
Statistic 33
Most homeowners are not aware of their water heater's anode rod or that they are supposed to inspect it.
Pacific Northwest National Laboratory, citing Turriff and Bailey (2010)
Statistic 34
Both scale and corrosion increase with water usage and temperature; lower setpoints and lower use extend tank life.
Pacific Northwest National Laboratory for the US Department of Energy (2013)
Worked example
Angi's average lifespan is about 11 years. The insurance industry's average age at failure is 10.7. The two figures differ by roughly four months, per RapidEye Research. Read together, they say a water heater's "lifespan" is not when it wears out, it is when it leaks: the average unit reaches the end of its life by failing, and 69 percent of the time that failure is water on the floor.
What this means: for a rental, the age of every water heater in the portfolio is the single most predictive maintenance number on the books. A unit past 10 years is, on the insurance industry's data, at its average failure age, and the failure mode is a leak in a closet or utility room that a guest may not find for a day. The anode rod is the one cheap, inspectable part that changes the odds.
What the failure costs beyond the unit
According to the Insurance Institute for Business and Home Safety (ibhs.org), as reported by Pacific Northwest National Laboratory (pnnl.gov), water heater failures cost an average of $4,444 per incident after the deductible was paid. Set against Angi's $1,346 average replacement, the water damage from a failed heater costs more than three times the heater. In the wider housing stock, according to the US Census Bureau (census.gov), 11.2 million occupied units reported water leakage from inside the home in 2023, and 3.9 million reported mold. A water heater is one of the largest single vessels of water in a home, and when it fails, the closet it sits in is rarely where the damage stops.
Statistic 35
Water heater failures cost an average of $4,444 per incident after the deductible was paid.
Insurance Institute for Business and Home Safety (2007), via Pacific Northwest National Laboratory
Statistic 36
11.2 million US housing units reported water leakage from inside the home in 2023.
US Census Bureau, American Housing Survey (2023)
Statistic 37
3.9 million US housing units reported mold in the previous 12 months.
US Census Bureau, American Housing Survey (2023)
Statistic 38
Tank water heaters hold 20 to 100 gallons of water, the volume released into the home if the tank fails.
Angi (2026)
Worked example
$4,444 in water damage plus a $1,346 replacement is $5,790 for a failed heater against $1,346 for one replaced on schedule, per RapidEye Research. The failure costs 4.3 times the scheduled replacement, before a single refunded night, and that ratio is why the age of the unit, not its condition, is the number to manage.
What this means: a water heater is the one appliance where waiting for it to break is measurably the expensive strategy. The insurance data gives the age, the failure mode and the cost; the pricing data gives the replacement. Together they make the case for replacing on age rather than on symptoms, and for treating a wet pan at turnover as an emergency, not a note. Our leak detection research covers the sensor and shutoff side.
Cite this study
Academic or press use: copy a ready-made reference. RapidEye is the publisher.
Quick FAQ
How much does water heater replacement cost?
Water heater replacement costs $1,346 on average, in a normal range of $881 to $1,826, with a low of $350 and a high of $12,000, according to Angi's 2026 cost guide. A tank-style unit runs $600 to $2,500 depending on size and a tankless unit $1,400 to $3,900. About 90 percent of households have a tank heater.
How long does a water heater last?
Most water heaters last 6 to 15 years, with an average lifespan of about 11 years, according to Angi. Gas tank heaters last 6 to 12 years, electric tank heaters 10 to 15, and tankless units up to 20. That average lines up with the insurance data: an Insurance Institute for Business and Home Safety analysis of 700 water heater claims found the average age at failure was 10.7 years, ranging from 1 to 30.
How do water heaters fail?
By leaking. Of 700 water-heater-related water loss claims analysed by the Insurance Institute for Business and Home Safety, 69 percent were due to a leak in the water heater or the tank bursting, 13 percent to a valve malfunction, 10 percent to a supply line failure, 7 percent unknown and 1 percent other. Tanks most often leak because the sacrificial anode rod deteriorates and the tank corrodes.
What does a water heater failure cost in water damage?
$4,444 per incident on average after the deductible, according to the Insurance Institute for Business and Home Safety's analysis of 700 claims, which found water heater failures are one of the top five water-loss claim causes. That is more than three times Angi's $1,346 average replacement cost, so the failure costs more than the unit.
How much does water heater repair cost?
Water heater repair costs $615 on average, in a normal range of $228 to $1,017, with a low of $90 and a high of $1,800, according to Angi. Repairing a tank heater runs $100 to $500 while tankless repairs run $100 to $1,300. Parts are cheap: an anode rod $25 to $75, a heating element $15 to $60, a gas valve $70 to $200. If there is water in the pan or under the unit, the tank has usually corroded and needs replacing at $850 to $1,800.
Is a tankless water heater worth it for a rental?
A tankless unit costs $1,400 to $3,900 to replace against $600 to $2,500 for a tank, according to Angi, but lasts up to 20 years against 6 to 12 for a gas tank, and carries a 10-to-12-year warranty against 6, 9 or 12 for tank units. Tankless repairs are pricier at $100 to $1,300 versus $100 to $500. Converting from tank to tankless costs more in labor because the job can take twice as long.
Data sources
Every figure on this page traces to one of these named public sources, each checked against the original document before publishing.
AngiWater heater replacement, repair and lifespan cost guides (2026)angi.com
Insurance Institute for Business and Home SafetyWater heater failure risk analysis of 700 water-loss claims (2007)ibhs.org
Pacific Northwest National LaboratoryUS Department of Energy technical report on water quality and residential water heating (2013)pnnl.gov
US Census BureauAmerican Housing Survey, 2023 housing quality releasecensus.gov