Tariffs – A tax on imports of foreign goods paid by the importer. Ad valorem tariffs are assessed as a percentage of the value of the import (e.g., a tax of 25% on the value of an imported truck). Specific tariffs are assessed at a fixed rate based on the quantity of the import (e.g. 7.7% per kilogram of imported almonds), and are most common on agricultural imports.
Quotas – A restriction on the total allowable amount of imports based either on the quantity or value of goods imported. Quotas are in place on a limited number of U.S. imports, mostly agricultural commodities, in part due to past trade agreements to remove and prohibit them.
Tariff-Rate Quota (TRQ) –TRQs involve a two-tiered tariff scheme in which the tariff rate changes depending on the level of imports. Below a specific value or quantity of imports, a lower tariff rate applies. Once this threshold is reached, all additional imports face a higher, sometimes prohibitive, tariff rate.