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Depreciation deductions

Depreciation and capital allowances tool
This tool will help you calculate the deduction available from a depreciating asset or capital allowances and capital works purposes.
Depreciation and capital expenses and allowances
Capital allowance measures contain the rules for calculating the decline in value of depreciating assets.
Effective life of an asset
To use either of the depreciation methods, you have to work out how long the asset can be used to produce income - its effective life.
General depreciation rules - capital allowances
To depreciate most of your assets you apply the general depreciation rules (unless you're eligible to use simplified depreciation for small business).
Simpler depreciation for small business
You can choose to use simplified depreciation rules if you are a small business entity.
Simplified depreciation - rules and calculations
The ATO detailed rules and how to calculate depreciation under the simplified depreciation rules for small businesses.