VATF33300 | What to consider prior to determining whether to use an intervention: testing credibility: conducting a mark-up exercise
From HM Revenue & Customs · VAT Fraud
Mark-up exercises are used to test the completeness and integrity of a taxable person’s books and records. Basically, a mark-up is an amount, or percentage, which is added by the taxable person to the cost price of their goods or services in order to achieve a profit.
Mark-ups can be a useful tool:
during the risk analysis process;
as a test of credibility during a VAT visit; and
as an assessment tool.