Import duty refers to the tax an importer must pay to the US Government in order to bring foreign products into the commerce of the United States. Import duty can be calculated in a variety of ways, but most import duties are figured as a percentage of the declared value of the commodity. Import duty differs from product to product and is dependent on the commodity being imported, its declared value, its country of origin, and other factors like anti-dumping legislation and quota controls. Import duty values can be as low as zero or as high as 100% (or more) of the product’s declared value.