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Can You Claim Air Conditioning Installation as a Tax Deduction?

Published 26 June 2026 · Last updated 26 June 2026

Quick Answer

Yes, you can claim the installation of an air conditioning unit as a tax deduction under Division 40 (plant and equipment) of ITAA 1997. However, the deduction is not immediate; it is claimed over the effective life of the asset. For new properties, this can provide significant tax benefits, while restrictions apply to second-hand properties purchased after 9 May 2017.

Investors and landlords often seek ways to maximise tax deductions on their rental properties. One common question is whether the installation of an air conditioning unit can be deducted from taxable income. Understanding the rules around this can significantly impact your investment's profitability.

Claiming Air Conditioning Installation as a Deduction

Under Division 40 of the Income Tax Assessment Act 1997, air conditioning units are classified as plant and equipment, meaning they are depreciable assets. You cannot claim the full cost of installation as an immediate deduction. Instead, the cost is spread over the effective life of the asset, which the ATO typically sets at around 10 to 15 years for air conditioning units. A common misconception is that you can claim the entire installation cost in the year of purchase, but this is not the case unless specific conditions for immediate deductions are met, such as for low-cost assets under certain thresholds.

How This Works in Practice

Consider a 2015-built 3-bedroom house in Richmond, Melbourne, where the landlord installs a new air conditioning system for $3,500. Under Division 40, the effective life of the unit is assessed at 12 years. At a 37% marginal tax rate, the landlord can claim approximately $291 in depreciation for the first year. This deduction reduces the taxable income, resulting in a tax saving of $108 in the first year alone.

Professional Insight

In our experience, many investors overlook the cumulative impact of depreciation over time, focusing instead on immediate deductions. One thing we frequently see is landlords missing out on claiming depreciation altogether because they haven't obtained a professional depreciation schedule. What most investors don't realise is that even seemingly minor installations like air conditioning can add up to substantial deductions over the years. Always ensure your depreciation schedule is comprehensive and updated, especially after renovations or new installations.

When Does the Answer Change?

The rules differ in several scenarios:

  • Second-hand Properties Purchased Post-9 May 2017: Investors cannot claim depreciation on previously used plant and equipment.
  • New Builds vs. Established Properties: New builds allow full claims on new assets, while established properties are subject to restrictions if purchased after the 2017 budget changes.
  • Commercial Properties: Different rules may apply, often allowing more flexibility in claiming deductions.
  • Properties Held in a Self-Managed Super Fund (SMSF): Tax treatment may differ and requires specific advice.
  • When Should You Seek Professional Advice?

    You should seek professional advice when dealing with complex tax scenarios, such as properties held in SMSFs, mixed-use properties, or when you've made substantial renovations. A Chartered Quantity Surveyor can ensure your depreciation schedule is accurate and comprehensive, while an accountant can tailor tax strategies to your specific situation, maximising deductions and compliance.

    What to Do Next

  • Consult a Chartered Quantity Surveyor to get a depreciation schedule.
  • Review your property portfolio for potential overlooked deductions.
  • Discuss your tax strategy with your accountant, especially if you have recently installed new assets.
  • Keep detailed records of all installations and improvements.
  • Stay updated on tax law changes that could affect your deductions.
  • Frequently Asked Questions

    Can I claim the full cost of air conditioning installation immediately?

    No, the cost must be depreciated over the effective life of the asset, typically 10 to 15 years, under Division 40 of ITAA 1997.

    How does the 2017 budget change affect my claim?

    If you purchased a second-hand residential property after 9 May 2017, you cannot claim depreciation on existing plant and equipment, including air conditioning units.

    Are there different rules for commercial properties?

    Yes, commercial properties often have more flexibility in claiming deductions, but it's essential to consult a professional for specific advice.

    What happens if I install air conditioning in a Queensland property?

    The location does not affect the depreciation rules, but ensure your claims align with any state-specific incentives or rebates.

    How do I report this deduction in my tax return?

    Include the depreciation deduction in the 'Rental Schedule' section of your tax return. It's advisable to use a professional depreciation schedule.

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