How Far Back Can You Claim Depreciation on an Investment Property? Backdated Depreciation Schedules Explained (2026)

If you've owned an investment property for more than a year or two and never commissioned a tax depreciation schedule, there is a strong chance you have left several thousand dollars on the table at every tax return. The good news is that depreciation does not expire the moment you miss it under ATO amendment rules, you can usually recover at least two years of missed deductions, and a properly prepared schedule will continue to deliver deductions for up to 40 years from the property's construction date.

This guide explains exactly how far back you can claim depreciation in Australia, how a backdated depreciation schedule works, what the ATO actually allows you to amend, and the situations where commissioning a quantity surveyor today is still very much worth the cost even on a property you bought years ago.

How backdated depreciation claims actually works?

You can generally amend the last two tax returns (for individuals and small businesses) or the last four tax returns (for other taxpayers) to claim depreciation deductions you missed. A backdated tax depreciation schedule prepared by a qualified quantity surveyor allows you to lodge those amendments and capture the missed deductions as a refund. Going forward, the same schedule will continue to deliver depreciation deductions for up to 40 years from the property's original construction completion date so even on a 15-year-old investment property, ordering a schedule today typically secures another 25 years of legitimate deductions.

Why missed depreciation is so common

Tax depreciation is one of the few non-cash deductions available to Australian property investors meaning you can claim it without spending any additional money in the relevant year. The two components are Division 43 capital works (the building's structural elements such as walls, slab, roof, fixed cabinetry, tiling and driveways, generally depreciable at 2.5% per year for 40 years from original construction) and Division 40 plant and equipment (the removable assets such as carpet, blinds, hot water systems, ovens, dishwashers, air conditioning and smoke alarms, each with its own ATO effective life).

Despite the size of these deductions, three things conspire to make depreciation the most commonly missed claim in Australian property tax. Many accountants do not prepare schedules they rely on quantity surveyors but won't volunteer the suggestion if the client doesn't raise it. Investors who self-manage often don't realise depreciation applies to older properties at all. And the 2017 Treasury Laws Amendment (Housing Tax Integrity) changes which restricted second-hand plant and equipment deductions on residential property purchased after 9 May 2017 left many investors believing depreciation was no longer worth pursuing. It still is, on the capital works side and on any plant items in qualifying scenarios.

What the ATO amendment rules actually say

The ATO's amendment time limits are set out in section 170 of the Income Tax Assessment Act 1936. In plain English: individuals have a 2-year amendment window from the date the original assessment notice was issued; small business entities (turnover under $10m) also have 2 years; most other taxpayers (including larger trusts and companies) have 4 years; and fraud or evasion cases have an unlimited amendment period.

The two-year clock runs from the assessment date, not the lodgement date so if you lodged late, you may still have time to amend. There are also extended periods in specific circumstances (objections lodged, private rulings, certain trusts and partnerships). When in doubt, your accountant or the ATO portal can confirm the exact amendment window for each year.

The practical implication: if you've never claimed depreciation on an investment property and you're an individual, you can usually still recover the last two years of missed deductions through tax return amendments. The deductions further back than that are lost but the deductions going forward are not.

How a backdated depreciation schedule actually works

A backdated, or retrospective, tax depreciation schedule is structurally the same document as a standard schedule. The difference is in how the quantity surveyor sets it up. The QS establishes the property's construction completion date (this anchors the 40-year capital works clock) and the date you acquired the property (this anchors plant and equipment treatment and CGT cost base implications). The schedule lists out every year of ownership, with depreciation broken down per Division 43 (capital works) and Division 40 (plant and equipment). Where assets have been disposed of, renovated, replaced or scrapped during your ownership, the QS values those at the point of disposal. Your accountant then uses the relevant years of the schedule to lodge ATO amendments for the open years, and uses the same schedule going forward.

For older properties, or properties where you've completed renovations, a site inspection is usually still required so that the QS can identify and value plant items, capital works additions and any qualifying improvements that may not appear on original plans.

Real-world scenarios

Scenario 1: The accidental investor Brisbane townhouse

A buyer purchased a 2014-built townhouse in Brisbane for $480,000 in early 2019 and moved out two years later, converting it into a long-term rental. They have lodged five years of tax returns since the property became income-producing and have never claimed depreciation. A backdated schedule prepared in 2026 identifies approximately $7,200 per year in Division 43 deductions and a further $2,400 per year in plant and equipment for the first three years of rental, declining after that as items reached their effective life. Total missed deductions across the open amendment years: around $19,000.

Their accountant amends the last two tax returns, generating a refund in the order of $6,500–$7,500 at a marginal tax rate of 37%. The schedule itself cost $660 and continues to deliver around $7,500 per year for the remaining 28 years of the capital works clock.

Scenario 2: The 1980s Sydney unit holder

An investor has owned a 1985-built apartment in Sydney's Inner West for 11 years. The property pre-dates the 1987 capital works cut-off for residential construction, so there is no Division 43 deduction available on the original structure. Many investors stop here but a site inspection reveals that the building underwent a major common-property renovation in 2008 (a new roof, new render, upgraded balconies) and the apartment itself was refurbished in 2017 with new kitchen joinery, flooring, bathroom and air conditioning. These post-1987 capital works additions are depreciable, and the recent plant and equipment is also depreciable for the periods when the rules allow. The schedule unlocks roughly $3,800 per year in capital works and a smaller plant component, recoverable across the open amendment years and continuing forward for around two decades.

Scenario 3: The SMSF Perth duplex

A self-managed super fund holds a 2021-built duplex in Perth and has been claiming a basic depreciation estimate provided informally by the conveyancer at settlement. A new, properly site-inspected schedule from a registered quantity surveyor identifies an additional $4,100 per year in deductions the original estimate had missed (largely under-valued plant and equipment, and some external improvements not recorded on the plans). The trustees lodge amendments for the two open years and continue with the new schedule going forward. For an SMSF in pension phase the tax saving is partial, but in accumulation phase the impact is direct against the 15% fund tax rate.

Where backdated depreciation reports are most valuable

Backdated depreciation tends to deliver the largest recoveries for:

• Investors who have owned the property for 2–10 years and never had a schedule prepared

• Owners of properties built or substantially renovated after 1987 (when Division 43 became broadly available for residential property)

• Properties in higher-cost construction markets Sydney, Melbourne, Brisbane, Perth, Adelaide and major regional centres like Newcastle, Wollongong, Geelong, the Sunshine Coast and the Gold Coast

• Recently renovated properties, even older ones, where post-1987 capital works are significant

• Short-stay and corporate rental properties (subject to the post-2017 second-hand plant and equipment rules)

• Commercial property, where plant and equipment treatment is more generous and the 4-year amendment period applies to many ownership entities

It is generally less worthwhile to commission a schedule for very small, very old residential investments with little renovation history, or for properties you have already sold (though there can still be CGT cost base implications worth checking).

What about properties you've already sold?

If you sold an investment property in the last two years and never claimed depreciation, you may still be able to amend the relevant rental income returns to claim the missed deductions, and adjust the CGT cost base on disposal to reflect the depreciation that was or should have been claimed. This works in both directions: capital works claimed reduces the CGT cost base; missed deductions don't increase it indefinitely. This is a nuanced area and one where a coordinated approach between your quantity surveyor and your accountant is essential. Often the answer is to commission a backdated schedule, amend the years still open, and use the document to support a position on the CGT cost base.

The role of a qualified quantity surveyor

Depreciation schedules for tax purposes must be prepared by a person who is either a registered tax agent, or a qualified quantity surveyor (typically AIQS or RICS) who is a registered tax agent or working under the supervision of one. Real-estate-agent estimates, builder estimates and accountant-prepared schedules without QS input are not ATO-compliant and create audit risk. A proper schedule includes the QS's tax agent number, a methodology statement, year-by-year deduction tables on both the prime cost and diminishing value methods, and a site inspection record.

Cost of a backdated depreciation schedule

For a standard residential investment property in 2026, expect:

• Apartment or unit: $500 – $750 (site inspection required)

• Townhouse: $600 – $850 (site inspection required)

• House (single-storey): $650 – $900 (site inspection required)

• House (double-storey or renovated): $750 – $1,100 (site inspection required)

• Commercial property: from $1,200 (site inspection required)

The schedule fee is itself fully tax deductible in the year it is incurred. In nearly every case where the property is post-1987 construction and has more than two years of remaining amendment window, the schedule pays for itself in the first amended return.

FAQs

How far back can I claim depreciation on a rental property in Australia? Individuals and small businesses can generally amend the most recent two income tax returns. Other taxpayers (such as some companies, trusts and superannuation funds) can amend up to four years. The depreciation schedule itself looks back to the property's original construction date and forward up to 40 years.

Can I claim depreciation if I bought the property second-hand after 9 May 2017? You can still claim Division 43 capital works deductions. Division 40 plant and equipment deductions on previously used assets are restricted under the 2017 changes, but new plant installed by you, and plant in qualifying scenarios (new builds, commercial use, certain short-stay), remains deductible.

Is a backdated depreciation schedule the same as a retrospective schedule? Yes the terms are used interchangeably in Australian property tax practice.

How much can I expect to claim each year? This varies wildly with property age, type, location and renovation history. Australian residential investors with post-2000 properties commonly see $5,000–$15,000 per year in combined deductions. Newer properties and larger homes can exceed $20,000.

Can my accountant prepare the schedule? Only if they are also a qualified quantity surveyor. The skills required to identify and value plant items, common property allocations, capital works additions and effective-life classifications are a QS specialisation.

Do I need a site inspection? For residential property, yes, in nearly all cases. Site inspections identify plant items, additions and renovations that are not visible on plans, and protect the schedule from ATO challenge.

Will claiming depreciation increase my capital gains tax later? Division 43 capital works claimed will reduce your CGT cost base on sale. Plant and equipment generally does not. This is a key reason coordinated tax planning matters but in nearly all scenarios the immediate marginal-rate deduction outweighs the deferred CGT impact, especially if the property is held long enough to benefit from the CGT discount that applies to pre-1 July 2027 acquisitions.

Next step protect every dollar of depreciation you're entitled to

If you own an investment property and have never had a tax depreciation schedule prepared or have one prepared more than five years ago that hasn't been updated through renovations you almost certainly have legitimate deductions sitting unclaimed.

Propti's depreciation report team prepares ATO-compliant tax depreciation schedules nationally, including backdated and retrospective schedules for properties already in service. We coordinate with your accountant, attend the site inspection, and issue a 40-year schedule covering both Division 43 and Division 40. For investors with development or renovation history, we can also pair the depreciation schedule with a QS cost report, a retrospective property valuation for CGT cost base purposes, or an insurance replacement cost report. Book a depreciation schedule most reports are turned around within 7–14 business days from site inspection.

This article is general information only and not legal, tax or financial advice. Tax positions depend on individual circumstances. Consult a registered tax agent or your accountant before lodging amendments or taking any specific tax action.