Hot Water Cost Calculator
Compare total costs of heat pump, solar, gas and electric hot water over 5-20 years. Include rebates. Find the cheapest system for your Gold Coast home.
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10-Year Total Cost Comparison
For a 4-person Gold Coast household
Heat Pump
$3,402 upfront (after $998 rebate) + $345/yr running
$7,352
$2.01/day
Solar
$4,483 upfront (after $1117 rebate) + $228/yr running
$7,513
$2.06/day
Gas Continuous Flow
$2,400 upfront + $520/yr running
$8,400
$2.3/day
Gas Storage
$1,900 upfront + $683/yr running
$9,730
$2.67/day
Electric Storage
$1,300 upfront + $800/yr running
$9,550
$2.62/day
Frequently Asked Questions
What costs are included in the calculation?
The calculator includes upfront purchase and installation costs, government rebates (if enabled), annual running costs based on Gold Coast energy rates, and annual maintenance costs. All figures are based on average Gold Coast household data.
Are the energy rates accurate for the Gold Coast?
Yes. We use current Energex electricity rates and Allgas natural gas rates, verified January 2026. Running costs assume connection to Tariff 31 (Super Economy) where applicable.
Why does household size affect the cost?
Larger households use more hot water, which increases annual running costs. Larger households may also need bigger (more expensive) systems. The calculator adjusts both upfront and running costs based on household size.
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