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Greater Brisbane

Heat pump payback calculator

What this calculator answers

Compare an accepted current hot-water cost basis with a proposed heat-pump cost basis, then estimate the annual difference and indicative payback condition.

Useful to have ready

  • The current hot-water system, energy tariff or current running cost.
  • Household demand and a proposed total installed heat-pump cost.
  • For 45 kg LPG, the ongoing bottle price and any delivery or rental charges.

Hot Water Cost can provide accepted current-cost information Calculate the current cost first. Direct entry is always available.

Before calculating

The fixed 5, 10, 15 and 20-year horizons are planning checkpoints, not equipment-life, warranty or performance predictions. Rebates and rooftop-PV savings are not applied automatically.

Covers Brisbane, Logan, Ipswich, Redlands and Moreton Bay. No account is required and entries are not saved to a profile. Results appear only after the calculate button is selected and are planning estimates, not personal advice or a quote.

Est. paybackSubmit to calculate
Greater Brisbane only

Calculation details

Adjust the inputs, then submit or recalculate to refresh the result.

Location and supported region

Choose the supported council area. A postcode is optional and can help confirm the region.

Brisbane, Logan, Ipswich, Redlands, Moreton Bay council areas.

Current system, demand and energy cost

Describe the current hot-water service and the cost basis to compare with a heat pump.

Current system

Electric

Gas

Renewable

Litres per day at 60 °C equivalent, transferred from the submitted cost calculation or entered as a planning override.

Calculated from household size (3 people × ~50 L per person per day).

Drives the 50 L per person per day planning default when no custom household litres are entered.

Property gas supply: Mains natural gas. Carried for the optional comparison; gas pricing is not used for this electric calculation.

Use the usage tariff expected for the proposed heat pump. A carried controlled-load rate assumes the new system can remain on an eligible controlled-load circuit; confirm that with the retailer or installer.

Enter the hot-water energy cost only, not the whole household bill. Fixed electricity and gas supply charges are excluded.

Used only if the annual field is blank. Enter the hot-water portion only.

Proposed heat-pump installed cost

Use the disclosed planning benchmark or enter a current total installed quote.

Heat-pump upfront cost

Review and calculate

Check the answers above, then submit explicitly to create or refresh the payback estimate.

All inputs are explained below the results. Calculator inputs are not saved to a user profile.

Enter details to calculate
Complete the form, then select Calculate payback to see the results.
Results will appear after the form is submitted. Each figure uses the submitted details and the stated Greater Brisbane planning assumptions.

Greater Brisbane scope

HotWaterWise covers the Greater Brisbane council areas: Brisbane, Logan, Ipswich, Redlands, and Moreton Bay. Tariff defaults are Greater Brisbane planning inputs. The heat-pump performance value is a disclosed national planning benchmark, not a local climate or product rating. For locations outside Greater Brisbane, numbers will diverge from your actual bill.

Estimate, not recommendation

The default installed cost is a disclosed planning benchmark, not a live market median or installer quote. Replace it with a current written quote before making a purchase decision. The calculation does not select an installer or subtract incentives from the payback calculation.

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