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Can You Claim a New Hot Water System for Tax Purposes?

Published 26 June 2026 · Last updated 26 June 2026

Quick Answer

Yes, you can claim a new hot water system under **Division 40 of ITAA 1997** as it is a plant and equipment asset. The effective life is generally 12 years, allowing for depreciation deductions over this period. Always consult with a Chartered Quantity Surveyor for precise calculations.

Replacing a hot water system in an investment property is not just about maintaining tenant satisfaction; it also presents a valuable opportunity for tax deductions. Under Division 40 of ITAA 1997, a new hot water system qualifies as a depreciating asset, allowing you to claim its decline in value over time.

The core concept here is that a hot water system is considered plant and equipment, which means it can be depreciated over its effective life—typically 12 years. This is distinct from capital works (covered under Division 43), which pertains to structural improvements and has a different depreciation schedule. The most common misconception is that all property improvements are treated the same for tax purposes, but plant and equipment like a hot water system depreciate differently from, say, a new roof.

Take a practical example of a 2015-built 3-bedroom house in Geelong. You replace the old hot water system with a new one costing $2,500. As a plant and equipment asset, you can depreciate this over its effective life. Assuming you choose the diminishing value method, in the first year, you might claim approximately $375 as a deduction. At a 37% marginal tax rate, this reduces your tax bill by $138.75 in the first year alone.

In our experience reviewing thousands of properties across Australia, many investors overlook the full potential of depreciation on new installations. A common pattern is underestimating the variety of assets that qualify under Division 40. Often, investors either miss claiming or incorrectly categorise items, leading to suboptimal tax benefits. Additionally, not all hot water systems are treated equally; the effective life can vary slightly depending on the type, such as electric versus solar.

The answer can differ depending on your situation. If you acquired a second-hand property post-9 May 2017, you can't claim Division 40 depreciation on previously used plant and equipment, but newly installed systems are claimable. For buildings constructed before 1987, you may not claim capital works deductions unless renovations have occurred. If you own the property through an SMSF, the rules are similar, but tax treatment can differ slightly due to fund regulations.

Given these nuances, it's crucial to get professional advice. A Chartered Quantity Surveyor will ensure every eligible asset is captured and correctly depreciated, while an accountant will incorporate these deductions into your broader tax strategy. This collaboration ensures you extract maximum value from your property investments.

To maximise your tax benefits, start by:

  • Ensuring the new hot water system is classified correctly as plant and equipment.
  • Choosing the appropriate depreciation method—diminishing value often yields higher deductions in early years.
  • Keeping detailed records of the purchase and installation costs.
  • Consulting a Chartered Quantity Surveyor for a comprehensive depreciation schedule.
  • Reviewing your tax strategy with an accountant to integrate these deductions effectively.
  • Regularly updating your depreciation schedule as new assets are acquired or disposed of.
  • Frequently Asked Questions

    Can I claim the cost of installing a new hot water system?

    Yes, installation costs can be included in the asset's cost base for depreciation purposes under Division 40.

    Does the type of hot water system affect depreciation?

    Yes, different types (e.g., electric, gas, solar) may have slightly different effective lives, impacting the depreciation calculation.

    How do I claim depreciation on my tax return?

    You must include the depreciation deductions in your tax return, typically under the 'Deductions' section. Consult your accountant for precise reporting.

    Are there any state-specific rules for claiming hot water systems?

    While the federal tax rules generally apply, check for any state-based incentives or rebates that might affect your net cost.

    What happens if I sell the property within the asset's effective life?

    You'll need to adjust the depreciation claim and possibly account for any balancing adjustments or capital gains implications.

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