UK Accounting Glossary
A writing-down allowance (WDA) is a capital allowance available to UK traders.
Any additions to plant and machinery are added to written-down value of assets acquired in any previous year, and the writing-down allowance is calculated as 18% of it’s total.
For certain long-life assets it may be calculated at 8% in a similar way.
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This glossary post was last updated: 29th January 2019.