There is no single price after rebate, because installed costs and incentive amounts both vary. What you can do is build your own estimate in three steps, and then check it against quotes. We deliberately do not give a fixed dollar figure, since prices move with the product and your site.
Step 1: the installed price
Ask each installer for a fully installed price, including the unit, labour, plumbing and electrical work, any switchboard upgrade, and removal of the old system. A cheap unit with a long list of extras can end up costing more than a better one with everything included.
Step 2: the STC discount
Your installer should show the STC count for the model and your zone, and the dollar value applied. At the time of writing STCs have been roughly $38 to $40 each. A unit earning 25 STCs, as an illustration, would give a discount of about $950 to $1,000. Your count may be higher or lower. See how many STCs a heat pump earns.
Step 3: state incentives
Some states add more. Victorian Energy Upgrades, run by the Essential Services Commission, and the NSW Energy Savings Scheme are two examples, and eligibility and amounts change. Ask your installer which ones are included and check the scheme’s official page. For NSW, see the ESC explainer.
Your out-of-pocket price
Installed price, minus the STC discount, minus any state incentive applied at the point of sale. That is the number to compare across quotes.
From the desk: if a quote only says “after rebate” with no breakdown, ask what is in it. You want to know whether it includes state incentives, or only the federal STCs.
A worked comparison
Imagine two quotes at the same installed price. One applies only STCs. The other applies STCs and a state incentive. The second is cheaper for you, even though the headline is the same. Always ask for the list of incentives behind the number, and check the final amount you will pay on the day.
What this means for you
Collect two or three quotes, ask each for the same breakdown, and compare the final price and what is included. The hot water STCs pillar and the resources hub explain how installers claim, and how the rebate works covers the schemes in more detail.