Hot Water System Replacement Cost Calculator
Estimate the cost to replace a hot water system in Australia. Choose the new system type and your household size. Changing fuel type adds to the job.
Your hot water system replacement details
Your estimate sits within the typical range.
Heat pumps cost more upfront but run on a fraction of the energy of electric storage, and government rebates can cut the net price significantly, ask your installer.
A like-for-like swap is cheapest and fastest. Rebates and the much lower running cost of heat pump and solar can make the dearer options cheaper over their life.
Where the money goes
Estimated breakdown for your configuration
💰 Ways to save
- Check federal and state rebates for heat pump and solar hot water, they can cut the upfront cost substantially.
- A like-for-like replacement on the existing connection is the cheapest job.
How we estimate this
Replacing a hot water system in Australia typically costs $900 to $6,000 in 2026 depending on the system type and household size. Electric storage is cheapest; heat pump and solar cost more upfront but far less to run.
Pricing reviewed: October 2026.
Doing more than just hot water system replacement?
Build a combined estimate across every part of your project in one place.
Pricing reviewed October 2026. Indicative Australian costs, not a quote.
Understanding hot water system replacement costs in Australia
Replacing a hot water system in Australia typically costs $900 to $6,000 in 2026 depending on the system type and household size. Electric storage is cheapest; heat pump and solar cost more upfront but far less to run.
A like-for-like swap is the cheapest job. Switching fuel type or to a heat pump or solar can need extra plumbing or electrical work, but rebates and lower running costs often make them better value over time.
Frequently asked questions
How much does it cost to replace a hot water system in Australia?
Typically $900 to $6,000 in 2026. Electric storage is cheapest; heat pump and solar cost more upfront but qualify for rebates and cost far less to run.
Is a heat pump hot water system worth it?
It costs more upfront but uses around a third of the energy of electric storage, and rebates cut the net price. Over its life it is usually cheaper to own.
Are you a trades business?
Everyone on this page is working out what hot water system replacement costs because they are ready to hire. Put your business right beneath the calculator, in your state, so you are who they find. From $50/mo.