A-Z index

Capital allowances and expenses

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 calculate your depreciation deduction for most assets you apply the general depreciation rules (unless you're eligible to use simplified depreciation for small business).
Other capital asset and expense deductions
Special rules apply to claiming deductions for certain depreciating assets and other business capital expenses, such as the cost of setting up or ceasing a business, and project-related expenses.