Tariffs: How They Work and Who Pays

A tariff is a tax on imported goods, usually charged as a percentage of value or a fixed amount per unit. By raising the price of imports, a tariff lets domestic producers sell more and charge more, and it brings revenue to the government. But consumers pay higher prices, and firms that use imported inputs face higher costs. Economists also identify a 'deadweight loss': purchases that no longer happen and production shifted to less efficient domestic firms.

Who ultimately bears the tax depends on market conditions; studies of the US tariffs of 2018–19 found that most of the cost was passed on to American importers and consumers rather than absorbed by foreign exporters. Tariffs can also provoke retaliation, hurting exporters at home. Historically, tariffs were a main source of government revenue, and for many poorer countries they still are, which is one reason trade liberalization requires replacement taxes.