A guide to property depreciation

If you own or are thinking about buying a rental property, you’ve probably heard about property depreciation. For many though, their journey stops there because they understandably perceive the depreciation process as complex and heavy on legislation. We’ve prepared this guide to property depreciation in the hopes that it will help demystify the topic and enable you to start claiming depreciation and reducing your taxable income.

What is property depreciation?

The practice of property depreciation exists to recognise that assets have an effective useful life and that there is a reasonable expectation that their value will decline over the course of this use period. This decline is recognised as a non-cash tax deduction because, though there is no monetary loss occurring, the present value of the asset will gradually decrease relative to the initial cost outlay. As such, property depreciation allows for this loss of value to be calculated, recognised, and used to offset taxable income in the years following purchase.

How to calculate depreciation on your depreciating assets

What is a depreciating asset?

Depreciating assets are those that do not form part of the rental property’s physical structure.
Per the ATO, an asset qualifies as a depreciable asset if it is:

  • separately identifiable
  • not likely to be permanent
  • such that replacement of the item will occur within a relatively short period
  • not part of the structure of the building

Examples include carpets, curtains, appliances and white goods, furniture, and floating timber flooring.
Visit the ATO’s website for more information about depreciating assets you can and can’t claim.

How to treat depreciating assets costing more than $300

Depreciation on assets costing more than $300 is recognised over the course of the asset’s effective useful life. Decisions on the length of this period can be based on either the commissioner’s determination of a particular class of asset’s effective life or your own reasonable estimation. Regardless of your decision, make sure to keep detailed records and apply figures consistently.

Having determined the effective life of your asset, there are two methods to choose from when calculating its decline in value:

  • Prime cost method: this method sees depreciation recognised as a constant proportion of the asset’s initial value each year until the remaining value of the asset is zero.
    Formula: Asset’s cost x (days held / 365) x (100% / asset’s effective life)
  • Diminishing value method: this method sees depreciation recognised as a constant proportion of the asset’s remaining or ‘base’ value each year. As a result, higher deductions are claimed in the early years of the asset’s effective life compared to later years.
    Formula: Asset’s base value x (days held / 365) x (200% / asset’s effective life)

To illustrate the difference between these methods, let’s take the example of an asset with a cost of $80,000 and an effective life of five years.

Per the prime cost method, the asset’s yearly depreciation would be:

$80,000 x (365 / 365) x (100% / 5)
= $80,000 x 20%
= $16,000 each year

In contrast, the diminishing value method will yield a different depreciation amount each year as the base value of the asset declines:

$80,000 x (365 / 365) x (200% / 5)
= $80,000 x 40%
= $32,000 in year one
($80,000 – $32,000) x (365 / 365) x (200% / 5)
= $48,000 x 40%
= $19,200 in year two
And so on…

The below graph illustrates how these two methods treat depreciation differently over the course of the asset’s effective life:

Source: www.ato.gov.au

The two main points of contrast between the methods are that the diminishing value method recognises much higher levels of depreciation at the start of the asset’s life and that it also sees depreciation recorded against the asset after its effective life period is over, albeit in much smaller amounts. In comparison, the value of the asset at the end of its useful life under the prime cost method is $0.

How to treat depreciating assets costing $300 or less

Rather than being depreciated over time, an immediate full deduction can be claimed against depreciating assets costing $300 or less during the income year the asset was used for a taxable purpose.

Note that this does not apply to assets that individually cost $300 or less but are part of a set of assets costing more than $300. For example, imagine you purchase an outdoor dining setting for your rental property that includes four chairs priced at $100 each and a table costing $400. You would not be able to claim an immediate full deduction against the cost of each $100 chair because they would be considered as part of the overall setting, which cost $800 in total.

Are you new to property investment? Read our tips on how to start your investment journey today.

How to calculate depreciation on your capital works

What are capital works?

The ATO defines capital works as those expenses ‘incurred in building [a] property as well as carrying out structural improvements, alterations and extensions to [a] property’. Included in this definition are preliminary expenses, such as acquiring building permits, undertaking foundation excavation, and architect, engineering and surveying fees, as well as costs pertaining to building and construction, major renovations, and adding structural improvements.

How to treat capital works deductions

Capital works deductions can be claimed against the cost of works at a rate of either 2.5% or 4% per year over the course of 40 or 25 years, respectively (the specific rate will depend on when capital works took place), as long as the property was built after 17 July 1985, is either rented or genuinely available for rent, and has had the relevant works completed. Capital works deductions cannot exceed construction expenses.

Do you have a question about property depreciation? Get in contact with us today.


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Shirley Smith


We are, and have always been, a family-run enterprise. Founded by Shirley Smith in 1995, the idea for Access Property Management was conceived when Shirley realised there was a high level of demand for dedicated property management agencies, a need that was not being met by the existing real estate market. The agency is now headed by Shirley’s daughter, Stacy Whiting, who joined the business in 1996, and her husband, Mark Whiting, who has been at the agency for over 18 years. This focus on longevity extends to Access’ dedicated team of qualified property managers, with most staff having worked at the agency for 9 years or more.


Shirley’s original objective was to provide a closer link between property owners and high quality tenants provided by relocation companies and the corporate/executive sector. Over time we extended our services to better cater for the needs of all property investors and quality tenants, who were seeking a higher level of service, focus and experience.


For over 27 years, our family owned business has made an impact within the real estate industry in Perth Metro and based on our results we’ve established a strong reputation for integrity, distinction and innovation in real estate and management services.

Meet our team of dedicated property specialists.

“I have been using their services as a tenant, and I can say its an amazing experience. They are prompt at everything and quite helpful. Alongside, the property manager carry a great professional work ethics which is wonderful. You, as a tenant always feel accompanied by your property manager. Cheers.”

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“I have rented through Access twice since 2010 and both times have been great, particularly the last time when I rented in South Perth and my rental agent was Kelly Duncan. What a delight she was and is and nothing was too much trouble. Thanks Kelly for such a great experience. Shame I couldn’t stay with you.”

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“I rented a property through Natalie at APM. She was attentive, proactive and professional – everything you could want in a property manager (as a tenant and as a home owner, as I am myself also). I highly recommend APM, their professional staff and convenient services.”

Daniel – Mt Pleasant – Facebook

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“Many thanks for your help.  I have a couple of other properties and you guys are by far the easiest to work with and most professional.”

Dean – Owner

I would like to personally thank Kelly for her professionalism and pleasant manner when we were applying for a rental. My son Jarrod (18yrs) & daughter Nicole (22yrs) had been applying for rentals all of January with no success & I was disappointed that some of the agencies hadn’t even followed up on their good references to allow for a fair assessment of their application. As Kelly would know we were successful in this application but had to decline as we were also successful in purchasing a property in that same week. Kelly was very understanding and a pleasure to deal with. I will highly recommend your agency .

Heather – Prospective Tenant