Trying to work out what a heat pump hot water system really costs in WA after the rebate? Let’s clear something up first. Western Australia doesn’t run its own hot water rebate, so the discount you’ll actually get comes from the federal STC scheme, applied straight to your invoice.
That’s not bad news. The federal rebate still takes a solid amount off the price, and it’s handled for you at the point of sale. Here’s how it works in Perth, and what you can expect to pay once it’s applied.
Key Takeaways:
- WA has no state-specific heat pump hot water rebate; the discount that applies here is the federal STC.
- The STC rebate is applied upfront at the point of sale, so you don’t wait for a refund.
- Most Perth installs see roughly $550 off through STCs (estimate; varies by system and STC price).
- Heat pumps use around 70% less energy than electric storage (Australian Government), so savings continue after the rebate.
Is There a Heat Pump Hot Water Rebate in WA?
Short answer: there’s no separate Western Australian rebate for heat pump hot water. WA’s current household energy schemes cover things like home batteries and bill concessions, not hot water systems. The rebate that does apply here is the federal one, the Small-scale Technology Certificate (STC) discount, and every eligible Perth home can use it.
If you’ve read about generous hot water rebates in Victoria or New South Wales, those are state schemes that don’t reach WA. It’s worth knowing upfront so you’re not chasing a rebate that isn’t there. For a wider look at systems and value, see our 2026 heat pump hot water buyer’s guide, or check the WA Government’s household energy overview.
How the Federal STC Rebate Works
The STC rebate rewards you for installing a system that cuts grid energy use. When you fit an eligible heat pump, it earns a set number of certificates based on its capacity, your location, and the year. You assign those certificates to your installer, and they take the value straight off your invoice.
There’s no separate form to lodge and no cheque to wait on. We handle the STC paperwork start to finish, so the discount lands on your quote. One thing to note: the scheme winds down each year.
The deeming period sits at 5 years in 2026 and drops by one every January until the scheme ends in 2030, so the rebate is slightly larger the sooner you install (Clean Energy Regulator). If you want the how-it-works basics first, our guide on heat pump hot water systems explained covers them.
What You Actually Pay in Perth
Here’s the part that matters. A heat pump hot water system installed in Perth typically costs between $3,000 and $6,000, depending on tank size and how involved the job is. Take the STC discount off that, and most households land in the low-to-mid thousands out of pocket. Every figure here is an estimate; your final price comes in a written quote.
| System (tank size) | Installed price (est.) | STC discount (est.) | You pay (est.) |
| Compact (160 – 260L) | $3,000 – $4,000 | $550 | $2,000 – $3,200 |
| Family (315 – 400L) | $4,000 – $6,000 | $550-$850 | $2,800 – $5,000 |
Source: Ecoheat Energy install estimates, 2026. Figures are estimates only; final price is confirmed in a written quote.
Tank size is the biggest lever on price, so it pays to size the system properly. Our heat pump hot water sizing guide matches capacity to household size, and our running cost guide shows what the system costs to run once it’s in.
To see the rebate and the ongoing savings together, run your numbers through the hot water savings calculator.
Who Qualifies for the STC Rebate?
Most Perth homeowners qualify. To claim the STC discount, the system must be a listed, eligible heat pump model installed by an accredited installer, with the certificates created within the required timeframe after the job. Both the Reclaim and Apricus hot water heat pump systems we install are on the approved register, and we take care of the eligibility checks and paperwork.
Not sure your old system is due for replacement, or which unit suits your home? Our honest Reclaim heat pump review walks through a system we install across Perth every week.
Frequently Asked Questions
Is there a heat pump hot water rebate in WA?
There’s no separate WA state rebate for heat pump hot water. The rebate that applies in Perth is the federal STC discount, taken off your purchase price upfront. WA’s own energy schemes currently focus on batteries and bill concessions rather than hot water.
How much is the STC rebate for a heat pump in Perth?
For most Perth installs, the STC discount is roughly $800 to $1,200 as an estimate. The exact figure depends on your system’s capacity, the STC market price on the day, and the deeming period, which shrinks each year until 2030. It’s applied as an upfront discount, not a refund.
Do I have to claim the rebate myself?
No. You assign your certificates to us, and we handle the STC paperwork and apply the discount to your invoice. There’s no separate form to lodge and no waiting on a payment. You see the saving worked into your quote.
Will the rebate get smaller over time?
No. You assign your certificates to us, and we handle the STC paperwork and apply the discount to your invoice. There’s no separate form to lodge and no waiting on a payment. You see the saving worked into your quote.
