Australian tax law allows investment property owners to claim two types of depreciation as a deduction: Division 43 (building and capital works) and Division 40 (plant and equipment). Together they can generate thousands of dollars in non-cash deductions each year — reducing your taxable income without requiring you to spend money.
Division 43 — the building allowance. The ATO lets you claim 2.5% of the original construction cost of a qualifying building each year for up to 40 years. On a building that cost $500,000 to construct, the annual Div 43 deduction is $12,500. This is a fixed amount — it does not diminish over time — and applies even if you purchased the property second-hand, as long as it was built after 15 September 1987.
Division 40 — plant and equipment. Separately, you can claim deductions on the individual assets inside the property: air conditioning systems, hot water units, carpets, dishwashers, ceiling fans, and more. The ATO assigns each asset type an “effective life” (typically 6–15 years), and the diminishing value rate is 200% divided by that life. A $10,000 pool of items with a 10-year average life generates a $2,000 first-year deduction, then $1,600, $1,280, and so on.
The post-2017 Div 40 restriction. Since 9 May 2017, buyers of second-hand residential properties can no longer claim Div 40 on the plant and equipment already installed in the property at the time of purchase. The restriction was introduced to prevent investors from claiming deductions on assets that had already been claimed by a previous owner. You can still claim Div 40 on new assets you install after purchase, and the rule does not apply to new properties or commercial properties of any kind.
Quantity surveyor schedules. For most investors, a tax depreciation schedule prepared by a registered quantity surveyor is the best way to maximise claims. The surveyor inspects the property, identifies all depreciable assets, and calculates the ATO-approved opening values for both Div 43 and Div 40. The schedule itself is tax-deductible and typically costs $500–$700. For properties built after 1987 with reasonable P&E, the first year of additional deductions frequently exceeds $5,000 — making the schedule economically worthwhile for the vast majority of investors.