A tax depreciation schedule is one of the most straightforward ways to reduce your annual tax bill as a property investor, and it is one of the most commonly skipped. Many investors either don't know it exists, hand their accountant the document without understanding it, or buy a second-hand property and assume there's nothing left to depreciate.
All three approaches leave money on the table. Here's what a depreciation schedule actually contains, how to read it, how much it's worth, and the key rules that changed in 2017 that most investors still haven't fully absorbed.
What a depreciation schedule is and who prepares it
A tax depreciation schedule is a report prepared by a registered quantity surveyor (QS) that identifies all depreciable items in your investment property and calculates the annual deduction you can claim for each.
The schedule is specific to your property. It is not a generic template. The QS inspects the property (or works from builder's contracts and construction data for new builds), identifies every item, assigns it an ATO-determined effective life, and calculates your annual deduction under the relevant method.
You cannot prepare your own depreciation schedule. Only a registered quantity surveyor or the ATO recognises as a properly qualified assessor can prepare a schedule that is acceptable for tax purposes. Your accountant uses the schedule you provide. They don't produce it.
The cost is typically $600 to $1,000 for a standard residential property. The cost of the schedule itself is tax deductible as a property-related expense. For most properties built after 1990, the first-year deduction from the schedule far exceeds the cost of obtaining it.
The two categories in every depreciation schedule
Every schedule is divided into two sections, corresponding to the two legislative categories of depreciable property.
Division 40: Plant and equipment. These are the removable, mechanical, or easily detachable items within the property. Examples include: hot water systems, air conditioning units, carpet, blinds and curtains, dishwashers, ovens, exhaust fans, smoke alarms, garage door motors, and electric gate systems.
Each Division 40 item has an "effective life" set by the ATO: the period over which it is expected to be useful. A hot water system has an effective life of 12 years. Carpet is typically 10 years. Air conditioning units are 10-15 years depending on type. The annual deduction is calculated by applying the diminishing value or prime cost method to each item's opening value.
Division 43: Capital works. This covers the building structure itself and permanently fixed structural elements. The concrete slab, walls, roof, built-in wardrobes, kitchen cabinetry (fixed), tiling, bathroom fixtures, and similar items.
Division 43 is depreciated at a flat 2.5% of the original construction cost per year, for a maximum of 40 years. It does not diminish year on year like Division 40. The deduction is the same in year 1 as it is in year 25 (as long as there is remaining eligible value).
How to read the Division 40 section
The Division 40 section of your schedule will typically present a table with the following columns for each item: item description, opening value (what the QS assessed it as worth at the time of purchase), effective life, method (diminishing value or prime cost), and the annual deduction.
The diminishing value (DV) method produces a higher deduction in early years and a declining deduction over time. The prime cost (PC) method produces an equal deduction each year over the effective life. Most investors choose diminishing value as it front-loads the benefit.
Example entries you might see:
Hot water system: Opening value $1,800 | Effective life 12 years | DV rate 16.67% | Year 1 deduction: $300
Carpet: Opening value $4,200 | Effective life 10 years | DV rate 20% | Year 1 deduction: $840
Split system air conditioner: Opening value $2,600 | Effective life 10 years | DV rate 20% | Year 1 deduction: $520
Blinds: Opening value $1,400 | Effective life 10 years | DV rate 20% | Year 1 deduction: $280
The schedule will show the deduction for each year going forward, with the diminishing value declining as the opening value reduces. Your accountant takes the current-year column and enters the total into your tax return.
How to read the Division 43 section
The Division 43 section is simpler. It shows the construction cost estimate (or actual construction cost from builder contracts), the date of construction, and the annual deduction at 2.5%.
Example: A property built in 2021. QS estimates construction cost at $320,000. Division 43 annual deduction: $320,000 x 2.5% = $8,000 per year, every year, until the 40-year period expires (2061) or the property is sold.
For older properties, the QS works backward from the current condition to estimate the original construction cost, adjusted for construction cost indices. A property built in 1995 is still eligible for Division 43 deductions on the remaining balance of its 40-year life, as long as you can establish the original construction cost.
Properties built before July 1985 have no Division 43 entitlement. The capital works deduction simply doesn't exist for pre-1985 buildings. Division 40 (plant and equipment) may still apply if the items are new or recently replaced.
The 2017 rule change: second-hand plant and equipment
This is the change most investors haven't properly understood, and it materially affects the value of depreciation for established property purchases.
From 1 July 2017, plant and equipment (Division 40 items) in a second-hand residential investment property can only be depreciated if you purchased the items new, or if they were installed new by you after you purchased the property.
What this means in practice: if you buy an established property that already contains carpet, blinds, a hot water system, and kitchen appliances, you cannot depreciate those items. They were second-hand at the time of your purchase. Only Division 43 (the building structure) remains available for established properties purchased after 1 July 2017.
The exception: if you replace those items after you own the property, the new items you install become claimable as Division 40. Replace the carpet: new carpet is depreciable. Install a new hot water system: depreciable. The original items in the property at the time of purchase are not.
For new properties purchased from a developer or built directly, the 2017 rule does not apply. All Division 40 and Division 43 items are available from day one. This is a meaningful tax advantage of new builds over established properties for investors purchasing after July 2017.
What a depreciation schedule is worth in dollar terms
The value depends on the property's age, construction type, and whether it qualifies for Division 40.
New build (post-2020 house, $480K purchase):
Division 43 (construction cost ~$290K): $290,000 x 2.5% = $7,250/year
Division 40 (all plant and equipment, first year): approximately $4,500-$6,500/year
Total year 1 depreciation deduction: $11,750 to $13,750
Tax saving at 37% marginal rate: $4,348 to $5,088/year
Established house (built 2010, $520K purchase):
Division 43 (construction cost ~$220K, 14 years of 40 remaining): $220,000 x 2.5% = $5,500/year
Division 40: nil (second-hand rule applies post-July 2017)
Total first year deduction: $5,500
Tax saving at 37%: $2,035/year
Pre-1985 property:
Division 43: nil
Division 40: nil (second-hand rule)
Total depreciation deduction: $0
Tax saving: $0
Same purchase price. Very different after-tax cash flow.
This is one of the structural reasons why new builds produce better after-tax cash flow than equivalent established properties, even when the gross yield and purchase price are similar.
How to use the schedule in your tax return
Your quantity surveyor prepares the schedule in a format that shows year-by-year deductions across the property's useful life. At tax time, you or your accountant refers to the current financial year column and enters:
- The Division 40 total for the year (from the plant and equipment schedule)
- The Division 43 amount (from the capital works schedule)
These figures go into the "Rental income and expenses" section of your individual tax return, under the depreciation line items. Your accountant should be asking for your depreciation schedule as a standard part of preparing your return. If they're not asking, that's worth flagging.
The schedule is prepared once and covers the full life of the property. You don't need to have it redone each year unless there have been significant capital improvements or you want the schedule updated to reflect new items installed.
What to do if you don't have one yet
If you own an investment property and don't have a depreciation schedule, get one. Most quantity surveyors can prepare a retrospective schedule that allows you to claim prior-year deductions you missed, subject to the ATO's amendment timeframes (generally 2 years for individuals).
Choose a quantity surveyor who is a member of the Australian Institute of Quantity Surveyors (AIQS) and who specialises in tax depreciation reports. Firms like BMT Tax Depreciation and Washington Brown are well-known in the sector. There are many others. The cost is $600-$1,000 and the schedule pays for itself in the first year for almost any property built after 1990.
If a quantity surveyor is offering a "free" schedule, understand how they're making money. Some depreciation firms have referral arrangements with financial advisers or property spruikers. An independent QS with a transparent flat fee is the clean option.
The bottom line
Depreciation is a non-cash deduction. You haven't paid that money out this year, yet you get to claim it against your income and reduce your tax. For a new build with $12,000 in annual depreciation at a 37% tax rate, that's $4,440 returned to you at tax time without spending an extra dollar.
Every investment property owner should have a current depreciation schedule. It is one of the cheapest, most reliable, and most consistently overlooked ways to improve your after-tax return.
This article is general information only and not financial or tax advice. Depreciation rules, effective lives, and ATO interpretations change. Speak to a qualified accountant and registered quantity surveyor about your specific property and situation.
Sources:
ATO guidance on rental property deductions and depreciation: ato.gov.au: Rental expenses you can claim
ATO guidance on Division 40 plant and equipment (second-hand assets rule): ato.gov.au: Depreciating assets
ATO guide on capital works deductions (Division 43): ato.gov.au: Capital works deductions
ATO Table of effective lives: Tax Ruling TR 2023/1: Effective life of depreciating assets
