What is customs duty?
When goods are imported into a different country or customs territory, there can be a charge applied called 'Customs Duty' that is charged by the local customs authority where the goods are being imported. If Customs Duty is required by your territory, you'll be responsible for paying it to the authorities. Whether Customs Duty is payable, and by how much, depends on your country's specific regulations.
If you do have to pay Customs Duty though, the amount payable is usually calculated based on the value of the goods and the type of goods being imported.