The majority of goods liable to customs duty are subject to an ad valorem duty. This is calculated by:
•Applying the rate of duty payable (as determined by the classification of the goods in the relevant tariff) to;
•The value of the goods.
It is therefore vital that, as well as being properly classified, goods are correctly valued. The value of goods for customs duty purposes includes the value of transporting and insuring the goods to the point of import. The value of goods for the purposes of calculating import VAT is the customs duty value plus the duty.