Prices verified October 2026 · Cross-referenced against 90+ Australian trade pricing sources · See methodology
National average prices. Select a city above for location-specific pricing.
A hot water system in Australia costs $800–$3,000 for electric storage, $1,200–$3,500 for gas storage, $1,500–$3,500 for continuous flow gas, and $3,000–$6,000 for a heat pump (before rebates). Government incentives can reduce heat pump costs — the federal Small-scale Renewable Energy Scheme applies in every state, and your state may offer its own rebate on top.
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The system type you choose determines both the upfront cost and ongoing energy bills for the next 10–15 years. Here's how the main options compare:
System Type
Supply + Install
Annual Running Cost
Lifespan
Best For
Electric storage
$800–$3,000
$500–$1,200
10–15 years
Budget replacement, off-peak tariff
Gas storage
$1,200–$3,500
$450–$1,250
10–12 years
Existing gas connection
Gas instantaneous (continuous flow)
$1,500–$3,500
$400–$1,050
15–20 years
Unlimited hot water, small homes
Heat pump
$3,000–$6,000
$200–$480
10–15 years
Best running cost, works with solar PV
Solar (electric boost)
$3,500–$7,000
$120–$400
15–20 years
Roof-mounted panels, sunny climates
Running costs are for a 3–4 person household at Brisbane energy prices, before the gas supply charge. Electric storage on an off-peak tariff sits at the low end of its range and on an anytime tariff at the high end; heat pumps and solar run cheaper again on off-peak or with rooftop solar. Heat pump prices are before the federal rebate (about $500–$700 off).
Heat pumps have become the most popular replacement choice in Australia. They work like a reverse air conditioner — extracting heat from the air to warm water — and use 60–75% less electricity than a standard electric storage system. Combined with rooftop solar PV, a heat pump can deliver near-zero running costs.
How Much Does a New Hot Water System Cost to Install?
What a new hot water system costs to install in Australia in 2026 depends mostly on the type. Electric storage is the cheapest at $800–$3,000 installed, gas storage runs $1,200–$3,500 and continuous flow gas $1,500–$3,500. A heat pump costs $3,000–$6,000 before the federal rebate ($2,500–$5,300 after), and solar hot water $3,500–$7,000. These are supply-and-install prices: the unit, the plumber's labour and the fittings.
Service
Low
Typical
High
Unit
Electric storage (supply + install)
$800
$1,800
$3,000
installed
Gas storage (supply + install)
$1,200
$2,200
$3,500
installed
Continuous flow gas
$1,500
$2,200
$3,500
installed
Heat pump (supply + install)
$3,000
$4,200
$6,000
installed
Heat pump (after rebates)
$2,500
$3,600
$5,300
installed
Solar hot water
$3,500
$5,000
$7,000
installed
Replacing an Existing Hot Water System
Most installs are replacements. A like-for-like swap is priced the same as the installed figures above, plus a few line items that are worth checking on every quote:
Removing and disposing of the old unit is $75–$200 where it is quoted separately, so check whether your quote includes it. If the old system has failed and you need hot water back the same day, an urgent like-for-like replacement runs $1,300–$4,000 supplied and installed. For prices in your city, pick it from the list above, or get quotes for your exact job.
Hot Water Cylinder Replacement Cost
Replacing a hot water cylinder — the storage tank itself — is the most common hot water job. A like-for-like electric storage cylinder replacement costs $800–$3,000 installed, and a gas storage cylinder $1,200–$3,500; removing and disposing of the old unit is $75–$200 where it is quoted separately. The tank alone runs $900–$2,200 supply-only; the rest of an installed price is the plumber's labour, fittings and compliance work. Replacing at end of life (electric and gas tanks last 8–12 years) is also the cheapest moment to switch to a heat pump — $2,500–$5,300 after the federal rebate, and about $200–$480 a year to run against $500–$1,200 for electric storage.
Heat Pump vs Gas vs Electric: 10-Year Cost Comparison
The cheapest system to buy isn't always the cheapest to own. Here's how total costs compare over 10 years at typical prices from our price table (a 3–4 person household at Brisbane energy prices):
Cost Component
Electric Storage
Gas Continuous
Heat Pump
Purchase + install
$1,800
$2,200
$4,200
Federal rebate (STCs)
$0
$0
-$600
Net upfront cost
$1,800
$2,200
$3,600
Annual running cost
$800
$650
$300
10-year running cost
$8,000
$6,500
$3,000
10-year total cost
$9,800
$8,700
$6,600
After the federal rebate, a typical heat pump costs about $1,800 more upfront than electric storage but saves about $500 a year to run, so it pays for itself in about 4 years and comes out about $3,200 ahead over 10 years (about $2,100 ahead of continuous flow gas). Federal STCs (Small-scale Technology Certificates) take about $500–$700 off a heat pump in 2026, and Victoria, NSW and the ACT offer additional rebates.
Hot Water Rebates and Incentives by State
Significant government rebates are available when upgrading from electric or gas to a heat pump or solar hot water system:
State
Heat Pump Rebate
Solar HW Rebate
Notes
Federal (all states)
About $500–$700 (STCs)
Varies by model (STCs)
Applied at point of sale; shrinks each year to 2030
Victoria
Up to $1,000 (Solar Homes); $1,400 locally made
Up to $1,000 (Solar Homes)
Income-tested; VEU discounts can stack
NSW
Up to $640 (ESS); $330 replacing gas
Up to $900 replacing electric (ESS)
Energy Savings Scheme, no closing date
ACT
50% up to $2,500 (concession card holders)
50% up to $2,500
Others: 3% loans up to $20,000
South Australia
Varies (REPS)
Varies (REPS)
Retailer Energy Productivity Scheme; offers set by retailers
Queensland
Via federal STCs only
Via STCs only
No state-specific rebate
Tasmania
Via federal STCs only
Via STCs only
No state-specific rebate
WA
Via federal STCs only
Via STCs only
No state-specific rebate
In Victoria, the Solar Homes rebate (up to $1,000, or $1,400 for a locally made product) comes off after the federal discount, so an eligible household can bring a heat pump from $2,500–$5,300 down to roughly $1,500–$4,300 (VEU discounts can stack on top). In the ACT, eligible concession card holders can get a Home Energy Support rebate covering up to half the supply and installation cost of a hot water heat pump. Always check current rebate availability before purchasing — amounts and eligibility change frequently.
Location of unit
Indoor vs outdoor, roof vs ground — relocating a hot water system in your home means extra plumbing and electrical (or gas) work, so ask for it as a separate line on the quote.
Emergency vs planned
Emergency replacement in Australia usually costs more than planned — an urgent same-day like-for-like replacement runs $1,300–$4,000 supplied and installed, and you have less time to compare quotes.
How to Save Money on Hot Water System Cost in Australia
1
Get quotes from licensed Australian plumbers who specialise in hot water — compare both upfront cost AND estimated annual running costs
2
Check government rebates before choosing a system — heat pump rebates can make them cheaper than gas long-term
3
Consider future energy costs — electric storage is cheap to buy but expensive to run ($500–$1,200/year)
4
Ask about the warranty — most systems offer 5–10 years on the tank and 1–2 years on labour in Australia
5
Replace your system before it fails — emergency replacements cost more and you get less choice
6
Ask about tempering valve requirements — the National Construction Code caps bathroom hot water at 50°C for new installations, and a valve costs $150–$400 extra
Which system is best value? For most Australian homes in 2026, heat pumps offer the best combination of upfront cost and running savings. After the federal STC discount (about $500–$700), a heat pump costs $2,500–$5,300 installed, and at typical prices it saves about $500 a year against electric storage, paying for itself in about 4 years. Solar hot water has even lower running costs but higher upfront investment.
Before you commit — compare your options
Side-by-side guides covering the decisions that most change your final hot water system cost.
Frequently Asked Questions — Hot Water System Cost in Australia
How much does it cost to replace a hot water cylinder?
A like-for-like hot water cylinder replacement costs $800–$3,000 for electric storage and $1,200–$3,500 for gas, installed. An urgent same-day like-for-like replacement runs $1,300–$4,000 supplied and installed.
What's the cheapest hot water system to run?
Solar hot water (electric boost) and heat pumps are the cheapest to run, at about $120–$400 and $200–$480 a year for a 3–4 person household. Electric storage is the most expensive at $500–$1,200 a year, and gas sits in between at $400–$1,250 depending on the system and your gas price.
Are heat pump rebates available in Australia?
Yes — every heat pump earns federal Small-scale Technology Certificates (STCs), typically worth about $500–$700 off the installed price in 2026, and Victoria, NSW and the ACT add state rebates on top. After rebates, a heat pump in Australia costs $2,500–$5,300. Check energy.gov.au for current eligibility.
How long does a hot water system last?
Electric and gas storage tanks last 8–12 years. Continuous flow systems last 15–20 years. Heat pumps last 10–15 years. Regular maintenance (anode checks) extends lifespan in Australia.
Should I switch from gas to electric / heat pump?
With rising gas prices, switching to a heat pump often makes financial sense over 5–10 years — especially with government rebates. The upfront cost is higher but running costs are 50–70% lower.
How long does hot water system installation take in Australia?
A like-for-like replacement takes 2–4 hours. Switching fuel types (e.g. gas to heat pump) may take a full day due to additional plumbing and electrical work.
How much does a hot water system cost in Australia?
Hot water system replacement in Australia costs $800–$7,000 installed in 2026. Electric storage is cheapest ($800–$3,000), gas storage costs $1,200–$3,500, heat pumps cost $3,000–$6,000 before the federal rebate ($2,500–$5,300 after), and solar hot water runs $3,500–$7,000. The best choice depends on your climate, energy costs, and available rebates.
What is the cheapest hot water system to run in Australia?
Heat pump hot water systems cost about $200–$480 a year to run in Australia, compared to $500–$1,200 for electric storage. Solar hot water (electric boost) is similarly cheap ($120–$400 a year) but costs more upfront. Continuous flow gas costs $400–$1,050 a year. Heat pumps work like reverse air conditioners, extracting heat from air — they use 60–75% less electricity than conventional electric systems.
How long does a hot water system last in Australia?
Hot water systems in Australia last 8–15 years depending on type. Electric storage lasts 8–12 years. Gas storage lasts 10–15 years. Heat pumps last 10–15 years. Solar systems last 15–20 years for panels (tanks may need replacing at 10–12 years). Hard water areas (Adelaide, Perth) reduce tank lifespan due to mineral buildup — anode replacement every 5 years extends life.
Are there rebates for hot water systems in Australia?
Yes — Small-scale Technology Certificates (STCs) take about $500–$700 off a heat pump across Australia in 2026; solar water heaters vary by model. Some states offer additional rebates: Victoria has the VEU program and the Solar Homes hot water rebate, the Energy Savings Scheme applies in NSW, and the ACT offers concession-card holders a Home Energy Support rebate of 50% up to $2,500 and other households 3% loans up to $20,000. These rebates make heat pumps and solar systems significantly more affordable — often bringing the upfront cost close to a standard electric system.
How much does it cost to install a new hot water system?
A new hot water system costs $800–$3,000 installed for electric storage, $1,200–$3,500 for gas storage, $1,500–$3,500 for continuous flow gas, $3,000–$6,000 for a heat pump ($2,500–$5,300 after the federal rebate) and $3,500–$7,000 for solar hot water.
How much does it cost to replace a hot water system?
A like-for-like replacement costs $800–$3,000 for electric storage and $1,200–$3,500 for gas storage, installed. Removing and disposing of the old unit adds $75–$200 where it is quoted separately, and an urgent same-day replacement runs $1,300–$4,000.
Does a hot water quote include removing the old system?
Not always. Removal and disposal of the old unit costs $75–$200 when it is quoted as a separate line, so check that your quote lists it.
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