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This calculator will find the depreciation rate(s) for all depreciable assets acquired after 1 April 1993.

This calculator is used to calculate depreciation on a business asset. You will need to know the depreciation rate that applies to the asset – you can get this from our depreciation rate finder.

Use this calculator to see if you're required to file an IR3 tax return or request a personal tax summary for the tax year 1 April 2010 to 31 March 2011.

Information contained in this worksheet will help you calculate your taxable income or loss from your interest in a foreign investment fund, using the deemed rate of return method.