Depreciation is one of the most valuable and most underutilised tax deductions available to Australian property investors. Unlike interest expenses or property management fees — which require you to spend money to claim them — depreciation allows you to deduct the natural wear and tear of your property and its contents, generating a tax benefit without any additional out-of-pocket cost.

For many investors, a properly prepared depreciation schedule will produce tax deductions of tens of thousands of dollars over the first five years of ownership alone. Yet a significant number of investors either do not have a schedule at all, or are working from one that understates what they can legitimately claim. This guide explains how depreciation works in Australia, what the law allows, and how to ensure you are not leaving money behind.

What Is Property Depreciation?

When you purchase an investment property, the Australian Taxation Office recognises that the building and its contents deteriorate over time through ordinary use. Rather than allowing you to deduct the full cost of the asset in the year it was acquired, the tax law permits you to spread that deduction across the asset's useful life — a process known as depreciation.

For property investors, depreciation deductions fall into two distinct categories under the Income Tax Assessment Act 1997: Division 43 (capital works) and Division 40 (plant and equipment). Understanding the difference between these two categories is essential, because they operate under different rules, have different deduction rates, and — since 2017 — have been subject to different eligibility restrictions depending on how and when you acquired the property.

Division 43: Capital Works Deductions

Division 43 covers the structural components of the building itself — the elements that are permanently fixed to the land and cannot easily be removed. This includes the concrete slab, brickwork, roof structure, internal walls, windows, doors, flooring, plumbing, and the like. It also encompasses structural improvements such as driveways, fencing, retaining walls, and in-ground swimming pools.

The ATO allows investors to deduct 2.5% of the original construction cost each year over a 40-year period. If a property cost $400,000 to construct, the annual capital works deduction would be $10,000 per year — a meaningful figure that compounds across a long holding period.

There is an important eligibility threshold: capital works deductions are only available for residential buildings where construction commenced after 15 September 1987, and for commercial buildings where construction commenced after 20 July 1982. Properties built before these dates do not qualify for Division 43 deductions, though any subsequent renovations or extensions that post-date the threshold may still generate a claim.

A key advantage of Division 43 is that it is not affected by the 2017 legislative changes discussed below. It applies equally to new and established properties, and can be claimed by any investor who holds a qualifying property — regardless of whether they are the original owner.

A $400,000 construction cost delivers $10,000 in capital works deductions every single year for 40 years. Over a typical ten-year hold, that is $100,000 in deductions that many investors never claim simply because they do not have a schedule.

Division 40: Plant and Equipment

Division 40 covers the removable assets within the property — items that are not permanently fixed to the structure and have an identifiable effective life. Common examples include:

Each of these assets has an ATO-prescribed effective life, and you can claim deductions either using the diminishing value method or the prime cost method.

Diminishing Value vs Prime Cost

Under the diminishing value method, you apply a fixed percentage to the asset's declining book value each year. This front-loads the deductions, producing larger claims in the early years of ownership and smaller claims as the asset ages. For most investors looking to maximise near-term cash flow benefits, this is the preferred method.

Under the prime cost method, you deduct an equal amount each year across the asset's effective life — a straight-line approach. While the total deduction over the life of the asset is the same under both methods, the timing differs. Prime cost produces consistent deductions but smaller ones in the early years compared to diminishing value.

Your quantity surveyor's report will typically present both methods, allowing you or your accountant to select the approach that best suits your tax position in any given year.

The 2017 Changes: What Second-Hand Buyers Need to Know

In the 2017 Federal Budget, the government introduced significant restrictions on plant and equipment depreciation for residential property. The changes took effect for contracts entered into from 9 May 2017 and fundamentally altered the rules for investors buying established residential properties.

Under the current law, investors who purchase an established residential property (one that has previously been used for residential accommodation) can no longer claim Division 40 depreciation on plant and equipment that existed in the property at the time of purchase. The entitlement to depreciate those assets was extinguished for subsequent purchasers.

There are, however, several important exceptions and nuances:

The 2017 changes did not eliminate depreciation for residential investors — they simply shifted the emphasis. New builds and commercial assets remain highly attractive, and established property buyers can still unlock significant deductions through capital works, new installations, and scrapping.

Why You Need a Quantity Surveyor — Not Your Accountant

A depreciation schedule must be prepared by a qualified quantity surveyor, not your accountant. This is not an arbitrary distinction — it reflects what the ATO actually requires.

Your accountant is an expert in tax law and financial reporting. But estimating the construction cost of a building, determining the original value of plant and equipment at the time of construction, and identifying every depreciable asset in the property requires specialist knowledge of construction and building costs that a general accountant typically does not have.

A qualified quantity surveyor — ideally one who is a member of the Australian Institute of Quantity Surveyors (AIQS) — will conduct a physical inspection of the property, identify all depreciable assets, determine their effective lives, and produce a comprehensive schedule that meets ATO requirements. The report is then used by your accountant to populate your tax return each year.

The ATO explicitly recognises quantity surveyors as qualified to estimate construction costs and asset values for tax depreciation purposes. Their reports carry audit-level credibility, which is important if your return is ever reviewed.

What a Depreciation Schedule Costs — and What It Returns

A professionally prepared residential depreciation schedule typically costs between $600 and $800 for a standard property. The fee will vary based on property type, size, location, and the complexity of the assets involved. Commercial properties with extensive fit-outs will generally cost more.

Importantly, the cost of the schedule is itself tax-deductible as a property management expense in the year it is incurred. So if you are in a 37% or 45% marginal tax bracket, the effective after-tax cost of a $700 schedule is closer to $440 or $385 respectively.

The return on that investment is typically significant. For a new residential property with a construction cost of $350,000, the first-year depreciation claim — combining capital works at 2.5% plus plant and equipment under diminishing value — could easily reach $20,000 to $25,000 or more. At a 37% marginal rate, that translates to $7,400 to $9,250 in actual tax saved in year one alone. The schedule pays for itself many times over before the first annual return is even lodged.

For established properties, the numbers are lower but still worthwhile. Even a modest capital works deduction of $5,000 per year produces $1,850 in annual tax savings for a 37% bracket investor — a return of more than 250% on the cost of the schedule in year one.

New Builds vs Established Properties: Different Strategies

The depreciation strategy differs meaningfully depending on whether you are buying a new or established property.

New Builds

New residential construction offers the most favourable depreciation outcomes. You can claim both Division 43 capital works (based on the actual construction cost, which is known precisely) and full Division 40 plant and equipment on all assets. The combination of a large construction cost base and brand-new assets at their original value produces the maximum possible depreciation claim in the early years of ownership.

If you are purchasing a new property off the plan, obtain the depreciation schedule as soon as settlement occurs. Your quantity surveyor can often use the builder's contract to establish the construction cost, simplifying the engagement.

Established Properties

For established properties, the Division 40 restrictions mean the focus shifts to Division 43 and ongoing asset replacement. When you purchase an established property and immediately renovate — replacing flooring, installing new appliances, repainting, or upgrading the kitchen — you can depreciate all newly installed assets in full. The renovation cost itself may also generate additional capital works deductions if it is structural in nature.

For older properties (pre-1987), capital works deductions on the original structure are not available, but any renovations completed after the eligibility date can still be claimed. A quantity surveyor can identify the dates and costs of past improvements through a retrospective assessment.

Commercial Property Depreciation

Commercial property — offices, retail tenancies, warehouses, industrial units — operates under a more favourable depreciation regime than residential. The 2017 plant and equipment restrictions do not apply, meaning investors in commercial assets can claim Division 40 depreciation on all existing assets within the property, regardless of when it was built or who previously owned it.

Commercial properties also frequently contain higher-value plant and equipment — HVAC systems, lifts, commercial kitchen fit-outs, specialised electrical infrastructure, and fire suppression systems — that generate substantial annual deductions. A well-depreciated commercial property can produce deductions that represent a meaningful percentage of the purchase price in the first few years of ownership.

Fit-Out Depreciation for Commercial Tenants

Commercial tenants who fit out a leased space — installing partitioning, flooring, lighting, cabinetry, or specialised equipment — can depreciate those fit-out costs over the effective lives of the individual assets. This is often overlooked by business owners who focus on the immediate expense of a fit-out without recognising the ongoing tax benefit it generates.

When a commercial tenant vacates and leaves behind a fit-out that has not been fully depreciated, the remaining undeducted value may be written off as a loss in the year the tenancy ends — a scrapping deduction that can be financially significant.

Scrapping Deductions: An Immediate Write-Off for Old Assets

When you remove and permanently dispose of a depreciable asset — whether as part of a renovation, an upgrade, or at the end of a tenancy — you may be entitled to claim the asset's remaining undeducted value as an immediate deduction in that tax year. This is known as a scrapping deduction.

For example, if you replace the carpet in an investment property and the old carpet had a remaining written-down value of $1,800, you can claim that $1,800 as a deduction in the year of disposal — in addition to beginning to depreciate the new carpet from its installation date.

Scrapping deductions can be substantial in renovation-heavy acquisitions where the previous owner had held the property for many years and the installed assets are well into their effective lives. A quantity surveyor who inspects the property before renovation commences can document and value the assets being removed, ensuring the full scrapping deduction is captured.

Common Mistakes That Cost Investors Money

A depreciation schedule is not a one-time document. It should be reviewed whenever you make improvements to the property, replace major assets, or approach the end of an asset's effective life. An outdated schedule is a missed deduction.

When to Get a Depreciation Schedule: A Practical Decision Guide

Use the following framework to determine whether a depreciation schedule is appropriate for your situation:

If you are uncertain whether a schedule is warranted for your specific property, the consultation fee for an initial assessment with a quantity surveyor is typically modest — often free — and will give you a clear picture of the expected annual deduction before you commit.

Depreciation is a passive deduction in the truest sense: once the schedule is prepared, the tax benefit flows each year without any further action on your part. For investors who are serious about building wealth through property, ensuring this deduction is captured in full is not optional — it is a fundamental part of managing an investment property professionally.