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Can You Claim a Rainwater Tank on Your Investment Property?

Published 26 June 2026 · Last updated 26 June 2026

Quick Answer

Yes, you can claim a rainwater tank under **Division 40 of ITAA 1997** as a depreciable asset if it's part of an investment property. However, any capital works related to installation may fall under **Division 43**. The effective life of a rainwater tank typically aligns with the ATO's guidelines, allowing for depreciation deductions over several years.

Investors often seek ways to optimise the tax benefits of their investment properties, and claiming a rainwater tank is one such opportunity. Under Division 40 of the ITAA 1997, a rainwater tank installed on an investment property is considered a depreciable asset, allowing you to claim tax deductions for its decline in value over time.

A common misconception is that the entire cost of a rainwater tank, including installation, can be immediately deducted. In reality, only the tank itself is depreciated under Division 40, while any capital works, such as plumbing or structural modifications, may fall under Division 43 and be subject to different depreciation rates. The effective life of a rainwater tank is typically around 15 years, according to the ATO's guidelines, allowing you to claim a portion of its cost each year.

To see how this plays out, consider a practical example: Imagine you purchased a 3-bedroom investment property in Geelong for $750,000 and installed a rainwater tank costing $3,000. Assuming an effective life of 15 years, you can claim approximately $200 per year as a depreciation deduction. At a 37% marginal tax rate, this reduces your annual tax liability by $74.

In our experience reviewing thousands of properties across Australia, many investors overlook the value of claiming smaller assets like rainwater tanks. Often, they fail to distinguish between plant and equipment and capital works, leading to missed deductions. Additionally, some mistakenly assume that eco-friendly upgrades automatically qualify for immediate deductions without considering depreciation rules.

The answer can differ depending on your situation. If the rainwater tank is installed on a second-hand property acquired after 9 May 2017, the rules around claiming depreciation on used plant and equipment may apply. For properties held in a Self-Managed Super Fund (SMSF), different tax implications might arise. Additionally, if the tank is part of a significant renovation, the capital works component could alter the claim strategy.

Given the nuances of tax legislation and individual circumstances, consulting with a Chartered Quantity Surveyor and a qualified accountant can ensure you maximise your deductions. They can provide tailored advice, taking into account the specific details of your property and financial situation.

Here are practical steps you can take immediately:

  • Confirm whether the rainwater tank is classified as plant and equipment or capital works.
  • Check the effective life of the tank according to the ATO's guidelines.
  • Gather receipts and documentation for the purchase and installation of the tank.
  • Consult with a Chartered Quantity Surveyor to prepare a depreciation schedule.
  • Discuss your tax strategy with your accountant to ensure optimal deductions.
  • Review your overall property investment strategy to include eco-friendly upgrades.
  • Frequently Asked Questions

    Can I claim a rainwater tank on a second-hand property?

    If the property was acquired after 9 May 2017, you may not be able to claim Division 40 depreciation on previously used plant and equipment, including rainwater tanks. Consult a QS for specifics.

    Is the installation cost of a rainwater tank deductible?

    Installation costs may be considered capital works under **Division 43** and depreciated over time, not immediately deducted.

    How does a rainwater tank affect my tax return?

    The depreciation of the rainwater tank will be included in your depreciation schedule, reducing your taxable income and, consequently, your tax liability.

    Are there state-specific incentives for installing rainwater tanks?

    Some states offer rebates or incentives for rainwater tanks. Check with your local government for specific programs applicable to your area.

    What documentation do I need to claim a rainwater tank?

    Keep all invoices and receipts related to the purchase and installation of the tank. A depreciation schedule prepared by a QS is also essential.

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    Written by Koste Team · Koste Chartered Quantity Surveyors · AIQS Member · RICS Member · TPB Registered · 1300 669 400 · info@koste.ai