Water Tank Cost Calculator
Estimate the cost of a rainwater or storage tank in Australia. Choose the capacity and material, then add the install extras like a pump and base.
Your water tank details
Your estimate sits within the typical range.
A pump and pressure system is essential if you want tank water at mains-like pressure to the house or garden, factor it in, not just the tank.
A level, compacted base is critical, a full tank is extremely heavy and will crack or lean on poor ground. The base is not the place to cut corners.
Where the money goes
Estimated breakdown for your configuration
💰 Ways to save
- A poly tank on a prepared pad is the cheapest way to add rainwater storage.
- Size the tank to your roof catchment and use, an oversized tank that never fills is wasted money.
or from $15/week over 5 years , indicative finance
How we estimate this
A water tank in Australia typically costs $600 to $12,000 supplied and installed in 2026 depending on capacity, material and install. A small poly tank is cheapest; a large steel or underground concrete tank with a pump reaches the top.
Pricing reviewed: October 2026.
Pricing reviewed October 2026. Indicative Australian costs, not a quote.
Understanding water tank costs in Australia
A water tank in Australia typically costs $600 to $12,000 supplied and installed in 2026 depending on capacity, material and install. A small poly tank is cheapest; a large steel or underground concrete tank with a pump reaches the top.
Poly tanks are the most popular for value; steel and concrete cost more. Beyond the tank, the base, pump, plumbing and delivery make up a real share of the total, especially for larger or underground tanks.
Frequently asked questions
How much does a water tank cost in Australia?
Typically $600 to $12,000 supplied and installed in 2026. A small poly tank is cheapest; a large steel or underground concrete tank with a pump costs the most.
Do I need a pump for a rainwater tank?
If you want tank water at mains-like pressure to the house or garden, yes. Gravity feed works for some garden uses, but most households add a pump and pressure system.
Are you a rural / ag business?
Everyone on this page is working out what water tank 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.