Roughly eight in ten Australian property investors either skip depreciation entirely or claim it wrong. That’s not a scare figure someone made up. It’s the pattern that tax professionals see year after year across the country. And the dollars lost aren’t trivial; we’re talking thousands per property, per year, gone simply because the right paperwork wasn’t ordered. This piece breaks down why the gap exists, what depreciation actually covers, and the one step that closes almost all of it. If you own a rental property and you’re not already working from a current depreciation schedule, read this before you lodge another return.
The Gap Nobody Talks About
Property investors tend to stay on top of the obvious deductions. Mortgage interest, council rates, property management fees- those show up in bank statements and invoices, so they’re hard to miss. Depreciation is different. It’s a non-cash deduction, meaning you don’t write a cheque to claim it. The asset simply wears out over time, and the Australian Taxation Office allows you to deduct that decline in value against your rental income.
Because no invoice and no cash is leaving your account, depreciation stays invisible until someone actively quantifies it. That’s where the gap comes from. Investors who focus only on cash expenses routinely leave the largest slice of their deduction entitlement on the table.
According to the ATO’s own analysis, around nine in ten rental property returns contain at least one mistake, whether that’s an expense claimed incorrectly, income left out, or interest not correctly apportioned between private and investment use. Depreciation is consistently one of the most under-claimed categories in that error pool. The ATO’s Rental Properties Guide 2025 lays out the full framework for what’s claimable, but most landlords never read it.
What Depreciation Actually Covers
Australian property depreciation splits into two distinct buckets, and understanding both is what separates a thorough claim from a partial one.
- Division 43 — Capital Works: This covers the building structure itself. Walls, roofing, concrete slabs, fixed windows, internal linings. Investors can claim capital works deductions over 40 years at a rate of 2.5% per year. On a property that cost $400,000 to construct, that’s $10,000 per year in deductions from Division 43 alone — before you touch a single fixture or fitting.
- Division 40 — Plant and Equipment: This is the removable stuff. Air conditioning units, carpets, blinds, dishwashers, hot water systems. Each item has its own ATO-approved effective life, and each depreciates at its own rate. A carpet might run over 10 years. A hot water system, 12. The depreciation rate on each one is calculated using either the prime cost method (straight line) or the diminishing value method, which front-loads your deductions in earlier years. Most investors with newer properties benefit more from diminishing value.
| Depreciation Type | What It Covers | Rate | Available For
|
| Division 43 (Capital Works) | Building structure, fixed components | 2.5% per year | Residential properties built after September 1987 |
| Division 40 (Plant and Equipment) | Removable fixtures, appliances, fittings | Varies by asset effective life | New assets installed by current owner (post-May 2017 rule) |
The May 2017 rule change is worth knowing. If you purchased a second-hand residential property after 9 May 2017, you can no longer claim Division 40 on assets that were already installed when you bought the place. Capital works under Division 43, though, remain fully claimable regardless of when you bought, as long as the building was constructed after September 1987.
A Concrete Look at What Getting It Wrong Costs
Consider Marcus, who bought a two-bedroom unit in Brisbane in 2021. The building was completed in 2015. Marcus’s accountant did a solid job with his cash expenses, loan interest, body corporate fees, and insurance, but nobody ordered a depreciation schedule. Marcus claimed zero depreciation for three years running.
A quantity surveyor assessment on that same property would typically identify Division 43 deductions starting from the original construction cost, plus any new assets Marcus installed after purchase. On a mid-range 2015 unit, Division 43 alone could produce $6,000 to $9,000 in annual deductions. At a 37% marginal tax rate, that’s between $2,200 and $3,330 in tax Marcus didn’t save each year. Over three years, that’s a four-figure sum gone permanently. Past years can be amended to claim missed deductions, but only within the ATO’s amendment window, and most investors don’t realize the window exists until it’s narrowing. This is the scenario that plays out across Australia constantly. It’s not negligence on Marcus’s part. It’s a system where the deduction only appears if you take a specific action to uncover it.
The CLAIM Stack: A Framework for Closing the Gap
Most guides on this subject stop at “get a depreciation schedule.” That’s necessary but not sufficient. Here’s a more complete sequence — call it the CLAIM Stack — that covers every decision point an investor actually faces.
- C — Check eligibility. Confirm your building’s construction date and whether your property qualifies for Division 43. Properties built before September 1987 don’t qualify for capital works, but Division 40 on new assets you’ve installed is still on the table.
- L — List all new assets. Since May 2017, only assets you personally installed qualify for Division 40 in a second-hand property. Document every appliance, floor covering, or fixture you replaced or upgraded. Keep receipts.
- A — Appoint a registered quantity surveyor. The ATO requires a qualified quantity surveyor to prepare a compliant depreciation schedule. Your accountant can apply the numbers, but only a QS can legally estimate construction costs and asset values for this purpose. Getting a Depro report from a registered quantity surveyor gives your accountant the exact figures needed to file an accurate and compliant return.
- I — Inspect for renovations. If a previous owner renovated before your purchase, residual Division 43 deductions on that construction work may still be available to you. A thorough QS inspection catches this; a quick Google search doesn’t.
- M — Match method to circumstance. Decide between prime cost and diminishing value based on how long you plan to hold the property. Planning to sell within five years? Diminishing value front-loads deductions and serves short-term holders better.
Why Investor Activity Makes This More Urgent Now
The Australian property investment market is changing shape. According to a May 2026 Reserve Bank of Australia bulletin using ABS person-level data, the share of housing investors with at least one negatively geared property rose before the global financial crisis, declined over the subsequent decade, and has begun increasing again more recently. That uptick matters for depreciation specifically: investors running negatively geared properties have the most to gain from maximizing every available deduction, because every additional dollar of allowable deduction reduces the taxable income that otherwise cuts into their overall tax position.
If you’re holding a negatively geared property, you’re already absorbing a cash flow shortfall. Leaving depreciation unclaimed on top of that compounds the cost unnecessarily. The RBA’s 2026 analysis of Australian housing investors draws on ATO and ABS data to show just how varied investor circumstances are, but the depreciation gap affects virtually every category of investor, regardless of whether they’re positively or negatively geared. “Investment property returns are genuinely complex and the rules around what can be claimed, and how, are not obvious.”, Consensus view among registered tax agents working with rental property investors, as reflected across ATO compliance guidance and professional tax literature.
The Steps That Actually Move the Needle
You don’t need a complicated strategy to fix an unclaimed depreciation position. You need four actions, in order.
- Pull up your property’s construction date. If it was built after September 1987 and you haven’t ordered a depreciation schedule, you have a gap.
- Engage a registered quantity surveyor; not just any accountant. The ATO is specific about who can prepare these reports.
- Ask your QS to confirm whether any pre-purchase renovations create additional Division 43 entitlements. Most landlords miss this.
- Give the completed schedule to your accountant before lodging your return, and ask whether an amendment for prior years is still within the allowable window.
Depreciation doesn’t reward the investors who wait. The deductions you didn’t claim in prior years may still be recoverable; but only while the amendment window stays open. The investors who close the gap fastest are the ones who treat the schedule as a standard part of ownership from day one, not an afterthought at the end of a financial year. What would you do with an extra two or three thousand dollars back in your pocket each tax year?
