Import duty and tariff are related concepts but not exactly the same.
Import Duty: This is a specific type of tax levied by a government on goods that are brought into the country. It is a charge that importers must pay when their goods arrive, and it can vary depending on the type of product and its country of origin.
Tariff: This is a broader term that refers to a system of taxes and duties that a government imposes on imported (and sometimes exported) goods. Tariffs can include various types, such as import tariffs, export tariffs, ad valorem tariffs (based on the value of the goods), and specific tariffs (a fixed fee per unit).
In summary, an import duty is a specific form of tariff. So while all import duties are tariffs, not all tariffs are limited to import duties.