One of the most overlooked tax benefits for Australian property investors is the ability to claim property depreciation deductions on the building itself. Under Division 43, also known as Capital Works Deductions or capital works allowance, investors can claim depreciation deductions on the structural elements of income-producing properties, such as walls, roofs, driveways, and retaining walls.
These deductions recognise the natural wear and tear of a building over time and help reduce taxable income while improving cash flow. Many investors focus on plant and equipment under Division 40, but understanding how Division 43 applies to construction expenditure incurred, actual construction costs, and renovation costs can unlock significant long-term tax savings.
Whether you’ve built, renovated, or purchased a residential rental property or commercial and industrial properties, knowing how to claim capital works deductions correctly ensures you maximise every tax benefit available to you.
What Is Division 43? (Capital Works Deductions Explained)
Division 43 of the Income Tax Assessment Act 1997 allows property owners, including property funds and self-managed superannuation funds (SMSFs), to claim tax deductions for the structural components of an income-producing property or leased building. These deductions, called capital works, cover the building’s fixed and permanent features that form its foundation and overall structure.
This includes construction elements such as concrete slabs, foundation excavation expenses, walls, roofing, tiling, bricks, flooring, built-in cabinetry, and building extensions. Because these depreciating assets wear out over time, the Australian Taxation Office (ATO) permits investors to claim a percentage of the original construction cost or construction expenditure incurred each year.
For residential buildings constructed after the date construction commenced on 15 September 1987, the standard capital works deduction rate is 2.5% per year, for up to 40 years from the date construction was completed. For older, commercial, and industrial properties, the rate and eligibility period may differ depending on the construction date and building type.
Division 43 does not cover movable fixtures or fittings, which are included under Division 40 (Plant and Equipment). It focuses on the property’s structure, making it one of the most reliable and long-term depreciation claims available to property investors.
Division 43 vs Division 40: Key Differences
Understanding the difference between Division 43 vs Division 40 is essential for calculating depreciation and claiming the correct depreciation deductions on your investment property. Both allow you to reduce taxable income, but they apply to different types of assets.
Division 43 covers the building’s structural elements and capital expenditure. This includes walls, roofs, driveways, doors, windows, retaining walls, fencing, and other fixed parts of the construction. These items are claimed as capital works depreciation at a fixed rate of 2.5% per year over up to 40 years.
Division 40, on the other hand, applies to plant and equipment assets. These are removable or mechanical items such as air conditioners, carpets, blinds, hot water systems, appliances, and other particular assets. The Australian Taxation Office (ATO) sets an effective life for each asset, which determines how quickly it can be depreciated, often using methods like the diminishing value method.
Since 9 May 2017, investors who purchase existing residential properties can no longer claim Division 40 deductions on previously used plant and equipment. However, they can still claim full Division 43 deductions for the building’s structural components, including any qualifying renovations and extensions.
By combining both divisions within a professionally prepared tax depreciation schedule by an independent qualified person, investors can ensure that every eligible item, from the foundation to the fittings, is claimed accurately and that maximum deductions are achieved.
What Can You Claim Under Division 43?
Under Division 43, property investors can claim deductions for the structural and permanent elements of a building that form part of its construction. These are often referred to as capital works and include materials and fixtures that are fixed to the property and cannot be easily removed.
Common claimable items under Division 43 include:
- Foundations, concrete slabs, and brickwork
- Walls, floors, ceilings, and roofing
- Driveways, retaining walls, and fencing
- Tiling, built-in wardrobes, and kitchen cabinetry
- Plumbing, electrical wiring embedded in the structure, and building permits
- Preliminary expenses such as engineering fees, surveying fees, architect fees, and foundation excavation expenses
For most residential rental properties built after 15 September 1987, these items can be claimed at a 2.5% annual deduction rate for up to 40 years.
Commercial, industrial, and short-term accommodation properties may qualify for higher rates, depending on the date construction commenced and building use.
Items that cannot be claimed under Division 43 include:
- The cost of land
- Soft landscaping, such as turf and plants
- Removable assets like appliances and furniture (which are covered under Division 40)
By correctly identifying what qualifies as a capital works deduction and construction expenditure incurred, property owners can ensure they claim the full value of the building’s structural depreciation over its lifetime.
How to Calculate and Claim Division 43 Deductions
Calculating your Division 43 deductions is straightforward once you know the property’s actual construction costs and completion date. These deductions are based on the original construction expenditure, not the property’s market value or purchase price.
For eligible residential buildings constructed after 15 September 1987, the capital works deduction rate is 2.5% per year for up to 40 years. For example, if the capital works component of your construction cost was $200,000, you could claim $5,000 each year until the full cost has been written off.
If you do not know the construction cost or actual costs, a qualified quantity surveyor or independent qualified person can estimate them accurately in compliance with Australian Taxation Office (ATO) guidelines. Quantity surveyors use building plans, inspection data, and industry cost databases to calculate eligible construction costs.
To claim your deductions:
- Ensure the property is income-producing during the income year or financial year.
- Obtain a tax depreciation schedule prepared by a qualified quantity surveyor.
- Provide the schedule to your accountant to include in your annual tax return.
Your depreciation schedule will outline each year’s eligible deduction under both Division 43 and Division 40, ensuring you claim every allowable amount of capital allowances and depreciation deductions.
By following this process, property investors can legally reduce their taxable income and improve long-term cash flow while remaining fully compliant with ATO requirements.
Special Scenarios: Renovations, Extensions and Older Properties
Many investors assume that not all properties qualify for capital works deductions. However, Division 43 can still apply to older buildings if renovations, extensions, or structural improvements have been completed after the eligible start dates.
If you have carried out renovations or extensions, such as adding a new bathroom, kitchen, building extensions, or outdoor area, those works qualify for a new 40-year deduction period starting from the date the renovation works were completed. Even if the renovation was completed by a previous owner, you may still be able to claim the remaining balance of those deductions.
Older buildings that do not qualify under the original construction dates may still offer significant deductions if substantial improvements have been made after 27 February 1992. A qualified quantity surveyor can inspect the property, identify eligible works, and estimate construction costs to ensure no missed deductions.
Renovations and structural upgrades can therefore create new opportunities to claim deductions under Division 43, even for properties built decades ago.
Common Mistakes to Avoid
Claiming Division 43 deductions can significantly reduce your taxable income, but small errors often lead to missed opportunities or non-compliance with Australian Taxation Office (ATO) requirements. Avoiding these common mistakes ensures you claim every allowable deduction correctly.
- Using the property’s purchase price instead of the construction cost or actual costs
Division 43 claims are based on construction expenditure, not the property’s purchase price. The purchase price includes land value, which isn’t deductible, though the income-producing building and structural improvements of the building may qualify for Division 43 deductions.
- Misclassifying assets between Division 43 and Division 40
Structural items such as walls, roofing, and tiling belong under Division 43, while removable fixtures like appliances or carpets fall under Division 40. Mixing these up can lead to incorrect claims.
- Overlooking past renovations or improvements
Even if you did not complete the renovation, you can still claim deductions on qualifying structural works carried out by a previous owner.
- Not engaging a qualified quantity surveyor or an independent qualified person
The ATO recognises quantity surveyors as experts in estimating construction costs and preliminary expenses. Without a professional report, your claims may be incomplete or inaccurate.
- Failing to update your depreciation schedule
If you complete new renovations, demolish structures, or add extensions, your depreciation schedule should be updated to reflect the new construction values and residual value.
By avoiding these common errors and relying on expert guidance, investors can ensure full compliance while maximising their capital works deductions under Division 43.
Why a Quantity Surveyor Is Essential for Division 43 Claims
A qualified quantity surveyor plays a vital role in ensuring your Division 43 claims are accurate and fully compliant with Australian Taxation Office (ATO) requirements. The ATO specifically recognises quantity surveyors as professionals who are qualified to estimate construction costs, including engineering fees, surveying fees, and building permits, for depreciation purposes.
When preparing a tax depreciation schedule, a quantity surveyor assesses your property, identifies all eligible structural components and existing assets, and determines their construction value based on detailed cost analysis. This process ensures that every claimable item under Division 43 is included, even if the original building costs are unknown.
The benefits of using a professional quantity surveyor include:
- Accurate construction cost estimates in full compliance with ATO regulations
- Identification of overlooked works, including past renovations or extensions
- Maximised deductions across both Division 40 and Division 43
- Reduced risk of ATO scrutiny through properly documented reports
A well-prepared depreciation schedule can deliver tens of thousands of dollars in additional deductions over the life of the property. It also provides peace of mind that your claims are substantiated and professionally verified.
Engaging a qualified quantity surveyor is not just about compliance; it is a strategic investment that helps you unlock the full financial potential of your income-producing property.
Maximise Your Property’s Tax Savings Through Division 43
Division 43 offers property investors one of the most reliable and valuable ways to improve their cash flow through tax depreciation. By claiming capital works deductions, you can recover a portion of your building’s construction costs each year while reducing your taxable income.
Understanding what qualifies under Division 43, how to calculate depreciation, and when to seek professional advice ensures you do not miss out on long-term financial benefits. Even older or renovated properties can generate significant deductions when assessed correctly.
Working with a qualified quantity surveyor or independent qualified person is the most effective way to identify eligible structural works, ensure compliance with ATO guidelines, and prepare a comprehensive depreciation schedule that includes both Division 40 and Division 43 assets.
Whether you are a first-time investor or a seasoned property owner, making the most of Division 43 deductions can deliver substantial savings and strengthen your property investment strategy. To find out how much you could claim, get a free quote and depreciation estimate from Thrifty Tax today.
