Regional Rainwater Tank Rebate

There are a few things to consider before you buy a rainwater tank. How much does a rainwater tank cost? What size rainwater tank do I need? To help you get started, read our quick guide to rainwater tanks.

Water Corporation customers connected to scheme water in the below towns list in the South West and Great Southern are eligible.  

If you're eligible, you can now apply for one of the following rebates: 

• New rainwater tank and plumbing - up to a maximum of $1,000 for a new rainwater tank with a capacity of 2,000L or more that is plumbed in.
• Plumbing in an existing rainwater tank - up to a maximum of $500 for the rainwater tank with a capacity of 2,000L or more.
• Replacing an existing plumbed in rainwater tank - up to a maximum of $500 for the rainwater tank with a capacity of 2,000L or more.  

Please have the following before you apply:

• Your paid invoices or receipt/s showing the purchase of an eligible product and payment to a licensed plumber for undertaking the work.
• Ensure your invoices contain all of the required information such as: 

1. details of the licensed plumber that performed the eligible services;  
2. the size (capacity) of the rainwater tank;
3. certify that the rainwater tank meets all relevant standards and government requirements; 
4. certify that the rainwater tank is Plumbed In and fully operational.

You will need scans or photos of the receipt/s to submit with your rebate claim.

Please find the terms and conditions here.

The Rainwater Tank Rebate is offered to customers in selected towns to save water by reducing demand on scheme water. To be eligible, you must: 

• Be connected to Water Corporation scheme water in one of the eligible towns 
• Be the owner of the property where the rainwater tank has been installed 
• Install a tank with a capacity of 2,000L or more 
• Meet all relevant standards and government requirements 
• Have the tank plumbed into your toilet and/or washing machine by a licensed plumber or restricted permit holder as per Department of Energy, Mines, Industry Regulation and Safety Plumbers Licensing and Plumbing Standards Regulations 2000 (the Regulations) 
• Provide copy of invoices for the purchase of the tank and plumbing/installation by a licensed plumber or restricted permit holder as per the Regulations 

To receive a rebate your property must be connected to Water Corporation scheme water and you must provide a Water Corporation account number in an eligible town.  

Similar offers may also be available for Busselton Water or AqWest customers. Visit their websites for more details.

The owner of the property must apply. Please contact the owner of the property regarding this offer. 

If you don’t already have an existing rainwater tank, a rebate of up to $1,000 or the cost of the tank and plumbing (whichever is less) is available for a new rainwater tank with a capacity of 2,000 Litres or more.  

Please note that to be eligible for the rebate for a new tank, the tank needs to be purchased and plumbed in within the offer period.  

If your rainwater tank was purchased prior to the offer commencement date for your town, you will be eligible for a $500 rebate for plumbing in an existing rainwater tank. 

You will need to engage a licensed plumber or restricted permit holder as per the Regulations to connect your tank. A rebate of up to $500 or the cost of the plumbing work (whichever is less) is available for an existing tank with a capacity of 2,000L or more (e.g., if the plumbing work costs $200, you with receive the equivalent amount). 

A rebate of up to $500 or the cost of the rainwater tank (whichever is less) is available for the replacement of an existing plumbed in rainwater tank with a new rainwater tank with a capacity of 2,000L or more (e.g., if the tank costs $200, you will receive the equivalent amount). 

Rebate applications will be reviewed subject to the Terms and Conditions of the program. If your rebate is approved, you will receive a credit for the relevant amount to your Water Corporation account. In exceptional circumstances we may consider alternative arrangements, and you must request this by emailing Waterwise.Towns@watercorporation.com.au. Approved rebates will be processed within eight weeks of the application date. 

Applications may take up to eight weeks to be processed. If your application is approved, you will be notified via email that your application was successful. Please note that your bill will not specifically reference the Rainwater Tank Rebate. We will contact you via email if we need any additional information to process your rebate. 

It is up to the customer to ensure that they meet the Terms and Conditions of the offer. Some common reasons for applications to be rejected include: 

• The application does not include invoices for the purchase and installation of the rainwater tank, or the invoices provided are incorrect 
• The application is missing information 
• The application is for a property that is not connected to Water Corporation scheme water 
• The application is for a property not located in one of the eligible towns listed on our website 
• The application is submitted outside of the rebate offer period (see FAQ below). 

The Rainwater Tank Rebate is available from 1 September 2025 to 31 May 2026 to eligible towns. Rebates will cease on 31 May 2026, or when the program funds have been expended. For any enquiries, please contact waterwise.towns@watercorporation.com.au. 

Yes. Plumbing regulations mean that a licensed plumber or restricted permit holder as per the Regulations is required to connect a rainwater tank to plumbing fixtures. More information about these regulation changes can be found on the Department of Energy Mines, Industry Regulation and Safety website.

We understand that regional towns often experience delays with deliveries or difficulties getting contractors. If you are concerned that your tank will not be delivered and installed before the rebate offer closes on 31 May 2026, please email waterwise.towns@watercorporation.com.au.