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Commercial Property · Koste Knowledge Base

What is a Leasehold Improvement and How Is It Depreciated?

Published 26 June 2026 · Last updated 26 June 2026

Quick Answer

Leasehold improvements are alterations made by a tenant to a leased property to suit their business needs. Depreciation of these improvements is typically claimed under Division 40 of the ITAA 1997 for plant and equipment, and Division 43 for capital works. The effective life of these assets determines the depreciation rate.

Leasehold improvements are modifications made by a tenant to a leased commercial property to better suit their business operations. These can include installing partitions, updating lighting systems, or adding custom fixtures. Unlike regular business expenses, these improvements are capital in nature and thus depreciable over time.

How Leasehold Improvement Depreciation Works

Under Australian tax law, leasehold improvements can be depreciated under two divisions: Division 40 and Division 43 of the Income Tax Assessment Act 1997. Division 40 applies to plant and equipment, covering assets like carpets, blinds, and air conditioning units, which are depreciated over their effective life. Division 43 applies to capital works, which include structural improvements such as walls and ceilings, depreciated at a rate of 2.5% per year.

A common misconception is that all leasehold improvements are depreciated at the same rate. In reality, the type of improvement determines the applicable division and depreciation rate. Additionally, lease term considerations and the potential for lease renewal can affect the depreciation schedule.

How This Works in Practice

Consider a business owner leasing a retail space in Melbourne. They invest $100,000 in leasehold improvements, including $30,000 for lighting and fixtures (Division 40) and $70,000 for structural changes like partitioning walls (Division 43). For Division 40 assets, assuming an average effective life of 10 years, they claim $3,000 annually. For Division 43 improvements, they claim $1,750 annually (2.5% of $70,000). At a 30% corporate tax rate, this results in a tax saving of $1,425 in the first year.

Professional Insight

In our experience, one frequent oversight is not differentiating between Division 40 and Division 43 assets, leading to incorrect depreciation claims. Business owners often fail to reassess the effective life of assets if the lease terms change. Another common issue is underestimating the impact of lease renewal options on depreciation schedules. We frequently see businesses overlooking the need for a detailed cost segregation study to maximise deductions. Lastly, many businesses miss claiming improvements that qualify as low-value pools, which can accelerate depreciation claims.

When Does the Answer Change?

The depreciation approach can change if the lease term is shorter than the asset's effective life, requiring adjustments. If the lease agreement includes a renewal option, the depreciation schedule might alter. Improvements made on pre-1987 buildings may not qualify for Division 43 deductions. If a business subleases the property, the responsibility for claiming depreciation may shift. For properties held in an SMSF, different rules may apply regarding ownership and depreciation.

When Should You Seek Professional Advice?

Given the complexities of leasehold improvement depreciation, professional advice is crucial. A Chartered Quantity Surveyor can provide a detailed depreciation schedule tailored to specific improvements. Additionally, consulting with an accountant ensures that these claims align with broader tax strategies and compliance requirements.

What to Do Next

  • Identify all leasehold improvements made to your property.
  • Consult with a Chartered Quantity Surveyor to differentiate between Division 40 and Division 43 assets.
  • Review your lease agreement for terms that may affect depreciation schedules.
  • Prepare a detailed depreciation schedule for tax purposes.
  • Engage with your accountant to ensure these deductions are correctly applied in your tax return.
  • Consider future lease negotiations in light of potential depreciation impacts.
  • Frequently Asked Questions

    How do leasehold improvements affect my tax return?

    Leasehold improvements are capitalised and depreciated over time, affecting your tax deductions. They must be accurately reported to maximise your tax benefits.

    Can leasehold improvements be written off in one year?

    Generally, leasehold improvements are depreciated over their effective life. However, small business entities may be eligible for instant asset write-offs under specific conditions.

    Is there a difference in depreciation for improvements in NSW?

    While state regulations can impact certain aspects of property management, the depreciation of leasehold improvements follows federal tax laws, not state-specific rules.

    What happens if I terminate the lease early?

    If a lease is terminated early, you may be able to claim the remaining undepreciated value of the improvements as a tax deduction.

    How do I calculate depreciation for a mixed-use property?

    Depreciation for mixed-use properties requires separating commercial and residential components, each claimed according to their respective rules under Division 40 and 43.

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    Written by Koste Team · Koste Chartered Quantity Surveyors · AIQS Member · RICS Member · TPB Registered · 1300 669 400 · info@koste.ai