Duty is you may be required to pay import duty if you are bringing goods into the country. There is no duty on goods that re in free circulation (See Free circulation with the EUL).

For goods that are imported from outside the EU, the rate of duty depends on the product and the country of origin. Duty is based on the cost, insurance and freight value (ad valorem duties) of the goods. Rates of duty can vary suddenly and without warning and can have a significant effect on the value of the goods.