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Working out decline in value

Last updated 7 April 2020

From 1 July 2001, deductions for the decline in value of most depreciating assets, including those acquired before that date, are worked out under the UCA rules.

The UCA contains general rules for working out the decline in value of a depreciating asset and those rules are covered in this part of the guide. Transitional rules apply to depreciating assets held before 1 July 2001 so you can work out their decline in value using these rules - see Depreciating assets held before 1 July 2001.

The general rules do not apply to some depreciating assets. The UCA provides specific rules for working out deductions for the assets listed below:

There are also specific rules for working out deductions for depreciating assets used in carrying on research and development activities - see the Research and development tax concession schedule instructions 2005  (NAT 6709-6.2005) for more information.