Customs duties are the amount that must be paid as a tax when a shipment is cleared from customs. In the international transportation of goods, when a shipment wants to cross the border of a country, it first enters the customs, and after going through the legal procedures, an amount is collected from the owner of the goods or the trading company in question to allow the shipment to be cleared. This amount, which can vary depending on the type of goods, country of origin and other factors, is the same as customs duties.