Thinking about swapping your old hot water tank? The cost of a heat pump installation in Australia usually ranges from $2,500 to $6,000, including installation and fitting. That is a wide range, and the reason is simple: brand, size, rebates and your home all change the final number. This guide breaks down exactly what pushes the price up and what brings it down.
What is the average heat pump installation cost?
Across Australia, the national average cost of a heat pump installation is around $4,500 after federal rebates. Budget models can cost under $2,500, while premium CO2-refrigerant units can reach $6,000 or more before rebates. Your heat pump installation cost depends heavily on which tier you choose.
| Cost Driver | Impact on Price | Typical Range |
| Tank size (170L–315L) | Bigger tank, higher cost | +$500 to +$1,500 |
| Brand and refrigerant type | Premium CO2 units cost more | $3,500–$6,500 |
| Installation complexity | New wiring or plumbing adds cost | +$300 to +$1,900 |
| State rebates | Can cut the price sharply | -$1,000 to -$2,500 |
| Federal STCs | Deducted at point of sale | -$500 to -$1,200 |
| Location | Labour rates vary by state | +/- $500 |
Why do heat pump installation costs go up
Several factors can push your heat pump installation price above average. Knowing them in advance helps you avoid surprise costs.
- Larger household, larger tank. A family of five needs a bigger tank than a couple. Bigger tanks cost more upfront.
- Switching fuel types. Moving from gas to a heat pump often means new wiring, a new circuit, or plumbing changes. This adds labour hours.
- Difficult access. Tight spaces, sloped roofs, or long pipe runs all add time and cost.
- Premium brands. CO2 refrigerant systems, such as those from Sanden or Reclaim Energy, offer the longest warranties and highest efficiency. They also carry the highest price tag.
- Older homes. Ageing switchboards or corroded pipework sometimes need upgrading before installation can start.
- Cold climates. Homes in Tasmania or the ACT often need larger tanks or CO2 units to handle winter conditions, which raises the cost of heat pump installation.
Why do heat pump installation costs go down
The good news is that there are just as many ways to bring the price down. Rebates are the biggest lever here.
- Federal STCs. Every heat pump installed in Australia earns Small-scale Technology Certificates (STCs). Your installer deducts this value straight off the quote, often worth $500 to $1,200.
- State rebates. Victoria’s Solar Victoria rebate and NSW’s Hot Water Upgrade Incentive can each knock over $1,000 off the price, with Victorian out-of-pocket costs dropping as low as $2,667 after rebates are applied.
- Like-for-like replacement. Swapping an old heat pump for a new one in the same spot is far cheaper than a full fuel-switch installation.
- Bundling with solar. Running your heat pump on rooftop solar lowers operating costs even further, and some installers offer a discount when solar and heat pump work are done together.
- Multiple quotes. Installer pricing varies. Comparing three quotes usually reveals a better deal.
Heat pump installation cost by state
Where you live affects both your heat pump installation cost and the rebates available to you.
Melbourne heat pump installation benefits from strong rebate stacking. Victoria pairs federal STCs with the Solar Victoria rebate and Victorian Energy Upgrades certificates, often bringing the out-of-pocket cost down to $2,700-$4,000.
NSW households can access the Hot Water Upgrade Incentive on top of federal STCs, while Queensland tends to have the lowest average cost nationally thanks to milder winters and competitive labour rates. Colder states like Tasmania and the ACT usually sit at the top end of the price range, since larger tanks and CO2 units are often needed.
Running costs: The other half of the equation
A heat pump’s upfront installation cost is only part of the story. Running costs matter just as much over the system’s life.
Most heat pump hot water systems cost $150 to $300 per year to run, compared to $500 to $1,200 per year for old electric storage tanks. That gap usually pays back the price difference within three to five years. After that, it is pure savings for the rest of the unit’s 10-to 15-year lifespan.
Popular brands and their price tiers
Brand choice is one of the biggest swing factors in heat pump installation cost. It pays to know where each brand sits before you request quotes.
- Rheem and iStore. These sit in the mid-range and are Australia’s most commonly installed brands. They offer solid warranties and wide availability of parts.
- Sanden and Reclaim Energy. These use CO2 refrigerant and carry the longest tank warranties, often 10 years. They also perform best in cold climates, which is why they cost more.
- Budget and generic brands. These can bring your heat pump installation cost under $2,500, but often come with shorter warranties, higher running noise, and less efficient performance over time.
Cheaper is not always better. A heat pump with a short warranty or low efficiency rating can end up costing more over its lifetime through higher power bills and earlier replacement.
Frequently asked questions
Does a heat pump installation cost more than a standard electric tank? Yes, upfront. A standard electric tank costs less to buy, but a heat pump uses far less power to run, which usually closes the price gap within three to five years.
Can I install a heat pump myself to save money? No. Heat pump installation in Australia must be carried out by a licensed, Clean Energy Council-accredited installer to qualify for STCs and state rebates. A DIY install would also void the warranty.
How long does heat pump installation take? A like-for-like swap usually takes two to four hours. Switching fuel types, such as from gas to a heat pump, can take a full day due to extra plumbing and electrical work.
How to get an accurate quote
Before booking an installer, a few simple steps can help you avoid an inflated heat pump installation cost:
- Check your postcode’s STC zone, since this affects your rebate value.
- Confirm your state rebate eligibility before you commit.
- Ask installers whether your existing wiring and plumbing will need upgrading.
- Compare at least three quotes from Clean Energy Council-accredited installers.
- Ask about warranty length, not just sticker price.
If you are already exploring solar for your home, it is worth checking our guide to solar feed-in tariffs to see how solar and a heat pump can work together to cut your bills further. You can also read our breakdown of Tier 1 solar panels if you are planning a bigger home energy upgrade.
Is a heat pump worth the cost?
For most Australian households, yes. Heat pumps use 60 to 75 per cent less electricity than a standard electric tank. The heat pump installation cost is higher upfront, but the running cost savings and available rebates make it one of the fastest-paying-back upgrades on the market today.
Ready to find out your exact heat pump installation cost? Contact Energy Matters today for a free, no-obligation quote tailored to your home and start saving on hot water costs sooner.
Sources and References:
- Solar Choice: Heat Pump Price Index, https://www.solarchoice.net.au/heat-pumps/price-index/
- Clean Energy Regulator: STC information, https://www.cleanenergyregulator.gov.au
