Depreciation Schedule
A Depreciation Schedule is a tax report that lists assets and their decline in value over time. It allows Australian businesses to claim deductions under Division 40 of the Income Tax Assessment Act 1997.
A detailed report listing assets and their decline in value over time for tax purposes.
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About this Document
A Depreciation Schedule is a critical document for Australian businesses, tradespeople and property investors. It outlines the depreciation deductions you can claim on your tax return for assets that lose value over time. In Australia, the Australian Taxation Office or ATO allows you to claim deductions for the decline in value of certain assets you use to earn your income. This process is formally known as writing off the decline in value of a depreciating asset. You cannot simply guess the value of these assets. You must maintain accurate records and calculations that comply with the Income Tax Assessment Act 1997. This guide explains exactly what a Depreciation Schedule is, why you need one, and how to manage it correctly to stay on the right side of the law. If you run a trade business, own a rental property, or operate a company with significant equipment, understanding this schedule is essential for your bottom line.
What is a Depreciation Schedule? A Depreciation Schedule is a report prepared by a qualified quantity surveyor or tax accountant. It lists every depreciable asset owned by your business or held in your rental property. The report estimates the effective life of each asset. It then calculates the tax deduction you can claim each year based on the cost of the asset and its diminishing value. For a tradesperson, this might include tools, utes, computers and machinery. For a property investor, it includes the building structure, fixed fittings like stoves and carpets, and capital works. The schedule serves as the primary evidence you need to support your depreciation claims during an audit. Without it, you risk underclaiming deductions and paying too much tax, or overclaiming and facing penalties from the ATO.
When do you need a Depreciation Schedule? You need a Depreciation Schedule as soon as you purchase an asset for business use or buy a rental property. For businesses, the moment you buy a piece of equipment, you start the depreciation clock. You must record the purchase date, cost and effective life. For rental properties, you should commission a schedule immediately after settlement. This allows you to claim deductions from the very first day you own the property. You also need an updated schedule if you complete significant renovations. Renovations create new assets that have their own depreciation schedules. If you run a small business, the ATO provides special concessions like the instant asset write-off. While this allows you to immediately deduct the full cost of eligible assets in the year you buy them, you still need to document these purchases clearly. The Temporary Full Expensing measure also allowed businesses to deduct the full cost of eligible assets, but this measure has ended and standard depreciation rules now apply for most assets purchased after 30 June 2023. Therefore, maintaining a current schedule is vital for accurate tax planning.
How to complete a Depreciation Schedule You generally do not complete a Depreciation Schedule yourself unless you have specific accounting training. For residential and commercial investment properties, the ATO requires that construction cost estimates be prepared by a qualified quantity surveyor. You can inspect the property yourself and take photos, but a professional must calculate the construction costs to satisfy ATO requirements. For business assets, the process involves identifying every asset used to produce income. You must categorize each asset correctly according to the ATO tax rulings. You then assign an effective life to the asset. The ATO publishes Taxation Ruling TR 2022/1 which lists effective lives for various assets. You can use this ruling to determine how many years an asset will last. Once you have the cost and effective life, you apply the depreciation method. The two main methods are the Prime Cost method and the Diminishing Value method. The Prime Cost method spreads the cost evenly over the life of the asset. The Diminishing Value method calculates depreciation as a percentage of the remaining balance each year. This method gives you higher deductions in the early years. You must record these calculations in a table or spreadsheet. The table must show the asset description, the date it was purchased, the cost, the effective life and the depreciation amount for the current year.
Legal requirements and ATO rules The legal framework for depreciation in Australia comes from the Income Tax Assessment Act 1997. Division 40 of the Act deals specifically with depreciating assets. This legislation dictates what constitutes a depreciating asset and how you calculate the decline in value. It is a legal requirement to keep records of your depreciating assets for five years after you claim the final deduction. If you fail to keep adequate records, the ATO may disallow your claims and impose penalties. There are specific rules for low-value assets. If an asset costs less than $300, you can claim an immediate deduction for the entire amount in the year you purchase it. This is known as the low-value pool. For assets costing between $300 and $1000, you can allocate them to a low-value pool and claim a set percentage each year. You must also understand the difference between repairs and improvements. A repair restores an asset to its original state and is an immediate tax deduction. An improvement improves the state of the asset beyond its original condition and must be depreciated over time. Misclassifying an improvement as a repair is a common error that attracts ATO attention.
The importance of Quantity Surveyors For property investors, the role of the Quantity Surveyor is vital. The ATO recognises Quantity Surveyors as one of the few professionals legally qualified to estimate construction costs for tax depreciation purposes. If you buy a property, you often do not know the exact cost of the bricks and mortar or the original fittings. A Quantity Surveyor inspects the property and prepares a Capital Allowances and Depreciation Schedule. This report complies with ATO Taxation Ruling 97/25. This ruling specifically outlines the acceptable methods for estimating construction costs. Relying on a professional ensures you maximise your deductions without breaking the law. A DIY estimate based on purchase price is not sufficient for the ATO.
Common mistakes to avoid One of the most common mistakes is failing to keep a record of the small purchases. Tools under $300 can be written off immediately, but if you do not record the purchase, you lose the deduction. Another major error is claiming depreciation on private assets. If you use your ute for both work and personal trips, you can only claim depreciation on the business portion. You must keep a logbook to prove the percentage of business use. Failing to adjust for personal use is a non-compliance issue. Business owners also make mistakes with the small business entity concessions. If you are a small business with an aggregated turnover of less than $10 million, you may be eligible to use simplified depreciation rules. This allows you to pool most assets and claim them at a rate of 15 percent in the first year and 30 percent in subsequent years. However, you must elect to use these simplified rules. You need to understand how these rules interact with your schedule. Finally, many people forget that scrapping an asset can trigger a deduction. If you throw away an old carpet or demolish a shed, you can claim the remaining written down value as a deduction in that year. You must document the scrapping and include it in your tax return.
Software and Record Keeping While you can use a manual spreadsheet, most Australian businesses now use depreciation software or integrated accounting platforms like Xero, MYOB or QuickBooks. These platforms often have depreciation modules built in. You simply enter the asset details and the software calculates the depreciation based on current ATO rules. This reduces the risk of mathematical errors. However, you still need to understand the underlying logic to ensure the data is entered correctly. You must store your invoices and receipts electronically or physically. The ATO requires evidence of the cost of each asset. If you purchase a second-hand asset, you need records of what the previous owner paid and how long they have owned it. This determines the remaining value you can claim.
Conclusion A Depreciation Schedule is more than just a list of items. It is a strategic financial tool. It ensures you claim every dollar you are legally entitled to while remaining fully compliant with the Income Tax Assessment Act 1997. Whether you are a carpenter with a van full of tools or an investor with a portfolio of homes, the principles remain the same. Record every asset, determine its effective life, calculate the decline in value and maintain those records for five years. If the process seems overwhelming, engage a registered tax agent or a Quantity Surveyor. The fee you pay for a professional schedule is usually tax deductible and is often recouped many times over in the first year of tax deductions. Ignoring depreciation is effectively giving money to the ATO that you could keep in your business. Use this guide to understand your obligations and take control of your asset register today.
Key Facts
- You can claim a deduction for the decline in value of a depreciating asset you hold for the purpose of producing assessable income.— Income Tax Assessment Act 1997 (Cth) s 42-15
- You must keep written records of how you worked out the amount of the decline in value for five years after the last claim.— Taxation Ruling TR 97/25
- Small business entities can use simplified depreciation rules including instant asset write-offs for assets under the relevant threshold.— Income Tax Assessment Act 1997 (Cth) s 328-180
- Estimates of construction costs for tax depreciation must be prepared by a qualified person such as a quantity surveyor.— Taxation Ruling TR 97/25
- You can choose to use either the prime cost method or the diminishing value method to calculate the decline in value.— Income Tax Assessment Act 1997 (Cth) s 42-70
- Assets costing less than $300 can be written off in the year of purchase if they are used predominantly for taxable purposes.— Income Tax Assessment Act 1997 (Cth) s 42-90
Sources
Required Sections
Asset Details
Information describing the specific asset including make, model and serial number.
Asset Details
Enter the full name of the asset to identify it clearly for tax purposes. Use a specific description rather than a generic term. For example, write '2023 Toyota Hilux SR5 Dual Cab' instead of just 'Ute'. You must be able to prove this asset is used for earning your assessable income. Under Income Tax Assessment Act 1997 (ITAA 1997) Section 8-1, you can claim a deduction for depreciation, also known as decline in value, only if the asset is held for the purpose of producing assessable income. If the Australian Taxation Office (ATO) reviews your return, vague descriptions raise red flags and may delay your claim.
Identify the manufacturer and the specific model number of the asset. This information links the physical item to the purchase invoice and establishes its effective life. The ATO publishes Taxation Ruling TR 2021/3, which guides the effective life of depreciating assets. If your asset is a standard item listed in the ATO schedules, you must use the Commissioner's effective life determination. If you use a different life expectancy, you bear the burden of proof. Precise manufacturer and model details help substantiate your choice of effective life if it differs from the ATO guidelines.
Record the serial number, vehicle identification number (VIN), chassis number, or engine number. This is a mandatory requirement for certain assets and best practice for all others. Under Subdivision 40-B of the ITAA 1997, you must keep records that explain all transactions relevant to your tax affairs for five years. A serial number distinguishes your specific asset from others and proves you still hold the asset. This is critical if you have purchased multiple identical tools or vehicles. If you sell or dispose of the asset, you must calculate a balancing adjustment. The serial number confirms you have disposed of the correct item and allows you to accurately calculate the remaining deductible value. Without this specific identifier, you risk disallowed deductions or penalties for insufficient record-keeping.
Purchase Cost and Date
The amount paid for the asset and when it was acquired.
Purchase Cost and Date
You must enter the total purchase price of the asset here. This figure needs to include the Goods and Services Tax (GST) if you paid it and cannot claim it back. For most small businesses using the cash or accrual accounting methods, the cost is the total amount on your tax invoice.
If you are registered for GST and the asset was purchased for business use, you should record the GST-exclusive price in your accounts. However, if you are not registered for GST, or if the purchase was for a private purpose where you cannot claim input tax credits, you must record the full GST-inclusive amount.
The Australian Taxation Office (ATO) requires specific details to support your claim for a depreciation deduction. Under Division 40 of the Income Tax Assessment Act 1997 (ITAA 1997), you can only claim a deduction for the decline in value of a depreciating asset if you actually own it or incur the cost of installing it. The cost you record here forms the "cost base" of the asset. This includes the purchase price paid to the supplier and any additional costs you incur to transport and install the asset so it is ready for use.
You must also record the exact date the asset was first used, or installed ready for use. This date is critical because it determines the start of the income year for which you can claim deductions. The ATO applies strict rules regarding the start time. Generally, you begin to depreciate the asset from the day you first use it for any purpose, even if it is not strictly for a taxable purpose yet. However, if you purchase an asset and hold it idle, the depreciation clock does not start until you put it to work.
For small business entities with an aggregated turnover of less than $10 million, the Simplified Depreciation Rules may apply. If you use the simplified depreciation system, you generally claim an immediate deduction for the asset if its cost is less than the relevant instant asset write-off threshold. The date you record here validates the claim for that specific financial year.
Keep the original tax invoice or receipt with your records. The ATO can request evidence of this purchase cost and date for up to five years after you lodge your tax return. Ensure the date matches your bank statements and the supplier’s invoice to avoid discrepancies during an audit.
Effective Life
The estimated number of years the asset will be used to generate income.
Effective Life (Years)
Enter the effective life of the asset in years. This figure represents the number of years the asset can be used for income-producing purposes, assuming it will be subject to wear and tear at a reasonable rate. You must base this calculation on the asset's condition when you first install it or start using it.
You generally have two options to determine this value. You can use the effective life determined by the Commissioner of Taxation, or you can calculate your own estimate.
Commissioner's Determination
The Australian Taxation Office (ATO) publishes standard effective lives for a wide range of assets in Taxation Ruling TR 2021/3. Using the Commissioner's estimate is the safest approach because the ATO accepts these figures without question. You simply find the asset description that matches your item and enter the corresponding number of years. This table is updated regularly to reflect current usage patterns.
Self-Assessment
Under Section 40-95 of the Income Tax Assessment Act 1997 (ITAA 1997), you are allowed to make your own reasonable estimate if you believe the Commissioner's effective life does not accurately reflect how long the asset will last in your specific business operations. This is common for tradespeople who maintain their equipment meticulously or use assets in harsh conditions that shorten their lifespan.
To make a self-assessment, you must base your estimate on factual information. Consider the manufacturer's specifications, the expected level of usage, and your history with similar assets. Keep records of how you calculated this figure. If the ATO audits your return, you must demonstrate that your estimate was reasonable at the time you made it.
Impact on Depreciation
The number of years you enter directly controls your depreciation deductions.
- Prime Cost Method: If you select this method, the asset is claimed evenly over the effective life. A longer life means a smaller annual deduction.
- Diminishing Value Method: This method writes off a higher percentage of the asset's value in the early years. While a longer life still reduces the annual percentage, you claim more upfront compared to the Prime Cost method.
If you change your estimate later on because the asset is wearing out faster or slower than expected, you can recalculate the remaining effective life. You must make this adjustment in the income year you become aware of the change. Ensure the figure entered here matches the life used in your tax return for the current financial year.
Depreciation Method
The calculation method used to determine the decline in value.
Depreciation Method
Select the method you will use to calculate the decline in value of your deprecatable assets. You must choose either the Prime Cost (PC) method or the Diminishing Value (DV) method.
Your choice affects how much you claim in your annual tax return and the timing of those deductions. Once you apply a method to a specific asset, you generally cannot switch to the other method for that asset in future years.
Prime Cost (PC) Method
The Prime Cost method assumes the value of the asset decreases uniformly over its effective life. This results in a consistent deduction claim each year. It is often referred to as a straight line of depreciation.
This method is suitable if you want predictable deductions and expect your taxable income to remain steady or increase over time. It spreads the deductions evenly, which can help balance your tax liability over several years rather than receiving a large tax break upfront.
Diminishing Value (DV) Method
The Diminishing Value method assumes the value of the asset decreases more in the early years of its effective life. You calculate the deduction based on the asset's opening value for that income year, minus any deductions claimed in previous years.
This method generally allows you to claim larger deductions in the first few years of owning the asset. This is beneficial if you want to maximise your immediate tax return to improve cash flow or if you plan to upgrade your equipment frequently. The deduction amount becomes smaller in later years as the remaining value of the asset reduces.
Compliance with Tax Rules
You must apply the chosen method consistently. You cannot change the calculation method for an asset after you have claimed your first deduction. Your selection must be justifiable and aligned with the way the asset is used to generate your assessable income.
Your claims must align with the Income Tax Assessment Act 1997 (ITAA 1997). Specifically, Division 40 outlines the rules for general depreciation deductions. The effective life of your assets must be determined based on the Commissioner of Taxation's estimates or your own reasonable calculation based on usage patterns.
Ensure you retain written records of your calculations. If the Australian Taxation Office (ATO) reviews your return, you must demonstrate that your depreciation method and effective life estimates are accurate and compliant with the Taxation Administration Act 1953 record keeping requirements.
Business Usage Percentage
The percentage of time the asset is used for business versus private use.
Business Usage Percentage
You must record the percentage of business use for every asset listed in this schedule. The Australian Taxation Office (ATO) does not allow deductions for assets used for private purposes. If you use an item for both business and private reasons, you can only claim depreciation for the business portion.
You need to estimate a reasonable percentage based on actual usage patterns. For items like tools or vehicles, keep a logbook or diary to support your claim. A logbook is valid for five years, provided your usage patterns do not change significantly. If you buy a ute and drive it 80 percent of the time for work and 20 percent for personal trips, you can only claim depreciation on 80 percent of the asset's value.
The method for calculating depreciation changes based on this percentage. You must apply the business usage percentage to the depreciation amount calculated under either the Prime Cost (straight line) or Diminishing Value method. You find these rules in Division 40 of the Income Tax Assessment Act 1997 (ITAA 1997).
Small business entities may use the simplified depreciation rules under Subdivision 328-D of the ITAA 1997. These rules allow you to instantly write off most assets or pool them. Even with these simplified rules, you must reduce the deduction by your private use percentage. You cannot claim a deduction for any portion of the asset that is for private use.
If you run your business through a company or trust structure, and private use occurs, the ATO may treat the private portion as a dividend or fringe benefit. This often happens with company vehicles used for personal holidays or weekend trips. You must declare this private usage on your Fringe Benefits Tax (FBT) return or personally.
Do not guess this percentage. If the ATO audits your return, they will ask for evidence. This evidence includes logbooks, odometer readings, job sheets, or timesheets showing when the asset was in use. If you cannot prove the business percentage, the ATO has the authority to disallow the deduction entirely. This could result in a tax bill plus penalties and interest charges.
Review your business usage percentage regularly. If you start working from home more often or stop using a vehicle for work, update your records immediately. An incorrect percentage can lead to a significant tax adjustment. You must apportion all expenses associated with the asset, including repairs and running costs, according to the same business usage percentage recorded here.
Annual Calculation
The table showing the opening value, yearly deduction and closing value.
| Asset Description | Opening Adjustable Value ($) | Decline in Value ($) | Closing Adjustable Value ($) |
|---|---|---|---|
| Example Makita Power Drill | 900.00 | 450.00 | 450.00 |
You must track the changes in value for every depreciating asset your business owns. The Australian Taxation Office (ATO) requires specific calculations to determine the deductible amount for each income year. This row represents the core calculation found in a Depreciation Schedule. It shows the financial movement of an asset from the start of the year to the end.
The Opening Adjustable Value is the cost of the asset minus any depreciation claimed in previous years. If you bought the drill this year, this figure is its cost. For an older asset, it is the written down value carried forward from the prior year's tax return. You use this figure to calculate the current year's deduction.
The Decline in Value is the tax deduction you claim for this specific year. Under Section 40-25 of the Income Tax Assessment Act 1997 (ITAA 1997), you calculate this using either the prime cost method or the diminishing value method.
Most tradespeople and small business owners choose the diminishing value method because it provides larger tax deductions in the early years of an asset's life. The formula for this method is the opening value multiplied by the applicable depreciation rate. If the asset cost less than $30,000 and was used mostly for business, you might have claimed the entire deduction under the Instant Asset Write-off rules. In that case, the decline in value equals the opening value.
The Closing Adjustable Value is the opening value minus the decline in value. This becomes your opening adjustable value for the next financial year. You cannot claim depreciation below zero. Once the closing value reaches zero, you stop claiming deductions for that asset.
You must keep accurate records of these figures for five years after you claim the final deduction. If you sell the asset before you fully write it off, you will need to calculate a balancing adjustment. The closing adjustable value is essential for that calculation. If the sale price is higher than the closing adjustable value, you include the difference as assessable income. If it is lower, you claim a further deduction.
Use this table structure in your schedule to substantiate your claims during an audit. It provides a clear audit trail from purchase to disposal. Ensure your depreciation rates align with the Commissioner's effective life estimates as published in Taxation Ruling TR 2021/3.
Frequently Asked Questions
What is a Depreciation Schedule?
When do I need a Depreciation Schedule?
Is a Depreciation Schedule legally required in Australia?
Can I prepare a Depreciation Schedule myself?
What is the difference between Prime Cost and Diminishing Value?
How long do I need to keep depreciation records?
What happens if I sell a depreciated asset?
Can I claim depreciation on second-hand assets?
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