When you buy equipment, technology, vehicles or fit-out items for your business, the full purchase price is not always deductible straight away. In many cases, the cost needs to be claimed over time through depreciation, known for tax purposes as a deduction for an asset’s decline in value.

Getting depreciation right matters because it affects your taxable income, cash flow forecasts, year-end reporting and the accuracy of your asset register. It also helps prevent common issues, such as claiming private use, overlooking a deduction when an asset is sold, or treating a capital improvement as an ordinary business expense.

What depreciation means in an Australian business context

Depreciation recognises that many business assets are used up, worn out or become obsolete over time. A computer, piece of machinery, office furniture or work vehicle may support your business for several years, rather than delivering all of its value on the day you buy it.

For income tax purposes, a depreciating asset is generally an asset with a limited effective life that can reasonably be expected to decline in value while it is used. Land and trading stock are not depreciating assets under these rules. Certain intangible assets, including in-house software and intellectual property, may also be treated as depreciating assets where the legislation specifically provides for it.

The tax deduction is generally available only to the extent the asset is used for a taxable purpose, such as earning assessable income or carrying on a business. If an asset is used partly for private purposes, the deduction must be reduced accordingly.

Common examples of depreciating assets include:

  • Computers, monitors, phones and tablets

  • Tools and specialised equipment

  • Manufacturing and workshop machinery

  • Office furniture and fittings

  • Point-of-sale systems

  • Commercial kitchen equipment

  • Business vehicles, subject to specific tax rules

  • Certain software and licences

  • Plant and equipment used in a rental or business premises

Depreciation does not necessarily mean an asset has stopped working or has no resale value. It is a method of allocating the cost of an asset over the period it is expected to be used.

Tax depreciation and accounting depreciation are not always the same

Business owners often see depreciation in their accounting software and assume the same figure automatically applies in their tax return. In practice, financial reporting depreciation and tax depreciation can differ.

For accounting purposes, depreciation is the systematic allocation of an asset’s depreciable amount over its useful life. The depreciable amount is generally cost less residual value, and useful life and residual value should be reviewed at least at each financial year-end for entities preparing financial statements under the relevant accounting standards.

Accounting depreciation is designed to present a meaningful picture of the business’s financial performance and asset values. Management may select a useful life and method that reflects how the business expects to consume the asset’s economic benefits.

Tax depreciation, by contrast, follows the income tax rules. These rules can use different effective lives, different methods, specific pooling concessions and special deductions for eligible small businesses.

This means your business may need to maintain:

  • A depreciation schedule for tax purposes

  • A fixed asset register for bookkeeping and financial reporting

  • Reconciliation entries where accounting depreciation differs from tax depreciation

For many sole traders and small companies, accounting software can record the purchase and track the asset. However, the tax treatment should still be reviewed before the business activity statement, tax return or financial statements are finalised.

Deciding whether a purchase is an asset, a repair or an immediate expense

The first question is not usually, “What depreciation rate applies?” It is, “What have we actually paid for?”

A business expense may be immediately deductible if it is a revenue expense, such as a routine repair, consumable supplies or an ordinary operating cost. A capital item, however, is more likely to provide an enduring benefit and may need to be recognised as an asset and depreciated over time.

For example, replacing a worn component to restore equipment to its existing condition may be treated differently from upgrading the equipment so that it performs a new or substantially improved function. The facts, timing and nature of the work all matter.

When reviewing a purchase, consider:

  • Is it a separate item that can be identified and used independently?

  • Is it expected to be used over more than one income year?

  • Does it improve, extend or fundamentally alter an existing asset?

  • Is it a repair that restores an asset, or a capital improvement?

  • Is the item used in the business, privately, or both?

  • Is the business entitled to claim GST input tax credits on the purchase?

The cost used for tax depreciation can be affected by GST treatment. If the business is entitled to an input tax credit, the GST-inclusive invoice total may not be the correct amount to place in the depreciation schedule. This is one reason it is important to keep tax invoices, not just bank transaction descriptions.

Timing also matters. Under the general tax rules, an asset starts to decline in value when it is first used, or installed ready for use, for any purpose. Ordering an item, paying a deposit or taking delivery does not always mean depreciation begins immediately.

How general tax depreciation methods work

Under the general depreciation rules, taxpayers generally choose one of two methods for working out an asset’s decline in value:

  • The prime cost method

  • The diminishing value method

Once a method is chosen for an asset, it generally cannot be changed for that asset.

Prime cost method

The prime cost method spreads deductions more evenly over the asset’s effective life. In simple terms, the deduction tends to be broadly consistent from year to year, subject to adjustments for part-year ownership, private use and later capital additions.

This approach can be useful where an asset is expected to provide a relatively consistent benefit throughout its life. It can also make budgeting and forecasting easier because deductions are more predictable.

Diminishing value method

The diminishing value method generally produces larger deductions in the earlier years and smaller deductions later on. It applies a percentage to the asset’s remaining tax value, rather than repeatedly applying the calculation to the original cost.

This method may better reflect assets that lose value quickly in their earlier years, such as some technology or equipment. However, the best method depends on the business’s circumstances, expected usage, tax position and record-keeping needs.

For tax purposes, the calculation also relies on the asset’s effective life. A taxpayer may generally use an effective life determined by the Commissioner or work out the effective life themselves, where that estimate is supportable.

Self-assessing an effective life is not simply a way to accelerate deductions. It requires a reasonable estimate based on the asset’s expected period of use in the particular business. Factors may include hours of operation, maintenance practices, technological change, the working environment and the business’s replacement policy.

A simple scenario

A landscaping business purchases a new piece of specialised equipment late in the income year. It is delivered before 30 June but remains in storage while the business waits for a required attachment to arrive.

Because the equipment is not yet ready to be used for its intended purpose, the business may not be entitled to begin claiming decline in value simply because it has paid for and received the equipment. Once it is installed ready for use, the business can consider the appropriate depreciation treatment, taking account of business use and any available small business concessions.

Simplified depreciation rules for eligible small businesses

Small business entities may be able to choose simplified depreciation rules rather than applying the general rules asset by asset. Eligibility depends on the business meeting the small business entity conditions, including the aggregated turnover test. Aggregated turnover can include turnover from connected entities and affiliates, so it is not always the same as the turnover shown in one set of business accounts.

For the 2026–27 income year, the law provides a $20,000 threshold for certain immediate deductions under the simplified depreciation rules, applying to eligible depreciating assets first used or installed ready for use for a taxable purpose on or after 1 July 2026.

A small business that chooses to use the simplified depreciation rules must apply the rules as a package, rather than selecting only the parts that produce the preferred tax result. Assets that do not qualify for an immediate deduction may generally be allocated to a general small business pool, with different treatment for newly added assets and assets already in the pool.

The simplified rules can reduce administration, but they are not automatically the best choice for every business. Matters to consider include:

  • Whether the business meets the eligibility conditions

  • The cost and type of each asset

  • Whether an asset is specifically excluded from the rules

  • The level of business versus private use

  • Existing pools from earlier income years

  • Whether the business may want to opt out of the simplified rules

  • The impact of a later decision to stop using the rules

The rules around opting in, opting out and re-entering the simplified depreciation regime can have ongoing consequences. It is worth reviewing the position before lodging the tax return, particularly where a business has recently grown, restructured or acquired significant assets.

Businesses not using simplified depreciation may also consider a low-value pool under the general rules. A low-cost asset is generally one costing less than $1,000 after deducting GST credits to which the taxpayer is entitled. Certain assets with a written-down value below that amount may also qualify as low-value assets.

Assets placed in a low-value pool are depreciated at set statutory rates rather than individually over their effective lives. This can simplify administration, but the choice has consequences. Once a low-cost asset is allocated to the pool, other qualifying low-cost assets generally need to be allocated in that and future years.

Private use, disposals and other issues that are easy to miss

Depreciation is not a once-only calculation. Your records should be reviewed when the asset’s use changes, when improvements are made, or when it is sold, traded in, scrapped, lost or destroyed.

Private and mixed use

A laptop, phone, vehicle or home-office asset may be used for both business and private purposes. In these cases, the tax deduction is limited to the taxable-use portion.

Keep a practical record that supports the business-use percentage. Depending on the asset, this might include a logbook, diary entries, appointment records, timesheets, usage reports or a reasonable documented estimate.

Do not assume that putting an asset in the business name makes its use entirely deductible. The actual use remains important.

Improvements and additions

Capital improvements or additions can increase the cost of an existing asset for depreciation purposes. Examples may include a major upgrade to machinery, a significant component replacement or a substantial enhancement to business equipment.

Routine repairs and maintenance should be considered separately. The correct treatment can affect both the current year deduction and future depreciation claims.

Selling or disposing of an asset

When a depreciating asset is sold or otherwise disposed of, there may be a balancing adjustment. Broadly, the tax outcome compares the asset’s termination value, such as sale proceeds or insurance recovery, with its adjustable value immediately before the event.

If the termination value is higher than the adjustable value, an amount may be included in assessable income. If it is lower, a deduction may be available, subject to the applicable rules and any private-use adjustments.

This is often missed when businesses trade in vehicles, replace equipment or write off obsolete technology. Removing the asset from the accounting software is not enough. The tax treatment of the disposal should also be considered.

Keeping records and managing depreciation at EOFY

A clear, up-to-date asset register makes depreciation easier to manage and can improve the quality of your financial information throughout the year.

For each significant asset, retain records of:

  • The supplier invoice and proof of payment

  • Purchase date and date first used or installed ready for use

  • Description, serial number and location where relevant

  • GST treatment

  • Business-use percentage and supporting records

  • Depreciation method and effective life used

  • Any capital additions, upgrades or improvements

  • Details of sale, trade-in, disposal, insurance proceeds or scrapping

At EOFY, review assets that have been purchased but are not yet ready for use, assets no longer used by the business, and assets that have been sold or replaced. This review can identify deductions that may otherwise be overlooked and help ensure the asset register matches the accounts.

The key takeaway is that depreciation is not simply a rate applied to a receipt. It is a structured process that starts with correctly identifying the purchase, determining business use, selecting the appropriate tax treatment and maintaining records throughout the asset’s life.

This article is general information only and is not personal financial or tax advice. Depreciation outcomes depend on your entity type, GST position, asset use, eligibility for concessions and wider tax circumstances. Speak with a registered tax agent or accountant, such as, for advice tailored to your business and its assets.