Tariff
A tariff is a tax on imports or exports between sovereign states. It is a form of regulation of foreign trade. It is a policy that taxes foreign products to encourage or protect domestic industry. It helps limit trade deficits. The tariff is historically used to protect infant industries and to allow import substitution industrialization.
Tariff in United States history
The tariff history of the United States spans from 1789 to present. The first tariff law passed by the U.S. Congress, acting under the then-recently ratified Constitution, was the Tariff of 1789. Its purpose was to generate revenue for the federal government (to run the government and to pay the interest on its debt), and also to act as a protective barrier around newly starting domestic industries. An Import tax set by tariff rates was collected by treasury agents before goods could be unloaded at U.S. ports.