A tax that is applied to the import of goods is known as a tariff. Customs duties, as tariffs are also known, are paid by the importer to their home government. However, the cost of the tariff is usually passed on to the consumer of the end product in the form of higher prices.
Ad valorem tariff
Tariffs can be calculated in different ways. The most common method is an ‘ad valorem’ tariff which is levied as a fixed percentage of the value of the imported goods. If imported whisky is subject to an ad valorem tariff of 20%, a bottle of $100 single malt whisky will attract duty of $20, while a $50 bottle of blended whisky will be taxed just $10.
Specific tariff
Specific tariffs, by contrast, are a ‘per-unit’ duty that is charged as a fixed amount on each imported good. The number of units being imported is what counts for a specific tariff. If there is a $10 specific tariff on imports of solar panels from China, for example, the tax paid will be $10 per panel, regardless of whether they are valued at $2,000 or $200 each.
Tariff rate quota (TRQ)
Tariffs that vary according to the quantity of a particular good being imported, are known as tariff rate quotas (TRQ). The rate of a tariff quota generally rises steeply once the ‘within quota quantity’ threshold has been reached. So for example, a country might allow the importation of 500 light aircraft at a tariff rate of 10%. However, any light aircraft imported above this threshold would be subject to 30% duty.
Mixed and compound tariffs
In some cases, countries such as India have taken a mixed tariff approach where they apply either an ad valorem tariff or a specific tariff on an imported good, based on which calculation brings in the most (or least) revenue. Pakistan has used compound tariffs, where both an ad valorem and a specific tariff are levied on the same imported good, then added together to reach a total. Tariffs can also be applied to exports, although these are rare.
Rules of origin
Calculating a tariff can be complicated when an imported good is made up of inputs from more than one country. For example, bottles of olive oil imported from Italy may derive from olives that were grown in both Morocco and the EU, for which different tariffs rules might apply. This is why many exporters of soft commodities need a certificate of origin document to accompany their shipments (as well as a phytosanitary certificate for example), enabling Customs authorities to calculate the relevant duty.
What are tariffs for?
Tariffs, like all taxes, are a way of raising revenue for government. In most advanced economies, however, tariffs are primarily a tool of industrial policy. Tariffs can be targeted to protect domestic sectors of the economy by effectively raising the cost of imported goods that compete in that market. If an overseas government is unfairly subsidising its export industries to undercut competitors and grab market share in a process known as ‘dumping’, tariffs can legitimately be used in retaliation.
Trade disputes
Sometimes, the threat of tariffs – or their imposition – is used as a negotiating tactic to obtain various political objectives, especially if the counter-party relies heavily on doing business with the country threatening tariffs. Unsurprisingly therefore, tariffs are often subject to international disputes that organisations like the World Trade Organisation (WTO) try to regulate. Frequently however, the WTO’s rulings have been ignored or flouted by the likes of the U.S., the EU, and China.
Protectionism
At the beginning of the industrial revolution, Great Britain applied high tariffs to enable its fledgling iron, steel and cotton-weaving industries, powered by new technologies, to develop into globally dominant exporters, while being protected from foreign competition. The success of this strategy, which came to be known as protectionism, was subsequently copied by the U.S., Germany, and China when they too industrialised their economies and sought to grow their markets overseas.
Free trade
Free trade policies favour the absence of restrictions on imports and exports, implying low or no tariffs. Post-war consensus has favoured free trade as an engine of global economic growth, although attitudes may be changing.
Large-scale subsidies for export manufacturing in China and elsewhere have raised geo-political tensions. De-industrialisation in some high-deficit countries, and persistent surpluses at the expense of domestic consumption in nations such as South Korea and Germany, have caused trade imbalances. The risk is that a correction may come in the form of greater protectionism and beggar-thy-neighbour policies; in other words, trade war.