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A tariff is a customs duty on imported goods. The importer—not the exporting country’s government—owes it at the border, but the economic cost can be shared among importers, foreign suppliers, domestic businesses, and consumers. How much shoppers ultimately pay depends on how companies and buyers respond; a tariff does not automatically raise every affected retail price by its full amount.
What a tariff is
“Customs duties on merchandise imports are called tariffs,” according to the World Trade Organization (WTO). A government can use tariffs to raise revenue and to make competing goods produced at home relatively more attractive. The duty applies under the importing jurisdiction’s rules, which determine the rate and how a shipment is classified.
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How tariffs are calculated and collected
An ad valorem tariff is a percentage of a product’s relevant customs value. A specific tariff instead charges a fixed amount per unit. The taxable base and any additional charges depend on the applicable customs rules, so a retail-price multiplication is not a reliable way to calculate the duty on a real purchase.
For illustration only, if a hypothetical imported item had a customs value of $100 and faced a 10% ad valorem rate, the duty would be $10 before other charges or special rules. This example explains the arithmetic; it is not a current tariff quote.
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The importer pays the duty to the importing country’s government when the goods enter under the relevant customs procedure. Businesses may then negotiate with suppliers, change where they source goods, absorb costs in their margins, or raise wholesale and retail prices. A company may use more than one response.
Who bears the cost?
The importer’s legal responsibility is distinct from the tariff’s economic incidence: who is ultimately worse off after prices, margins, and trade adjust. A foreign supplier might cut its pre-tariff price to keep access to the market. An importer or retailer might accept lower margins. A domestic competitor may raise its price if imported alternatives become more expensive. Consumers may pay some of the increase, but not necessarily all of it.
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The division depends on factors such as buyers’ alternatives, the bargaining power of suppliers and importers, and how readily buyers and sellers change their behavior when prices move. As the WTO explains, “The extent to which tariffs pass through to consumer prices is ultimately an empirical question.” Its example illustrates why: with a hypothetical 10% tariff and a $100 world price, a domestic price would be $110 if the world price did not change. If lower demand pushed that world price down to $95, the example’s tariff-inclusive domestic price would be $104.50. Those are illustrative values, not observed outcomes.
A recent US estimate—not a universal pass-through rate
In a 2026 Federal Reserve Bank of New York Staff Report, revised in September 2026, Mary Amiti, Sebastian Heise, and David E. Weinstein estimated that about 26% of the 2025 US tariff increase passed through to consumer prices relative to less-exposed goods, holding aggregate conditions fixed. The authors attributed 64% of that measured consumer-price increase to direct effects on foreign varieties and 36% to indirect effects involving imported inputs and domestic producer markups. They estimated that indirect effects take nine to twelve months to work through supply chains.
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These figures describe one study’s analysis of a particular period, country, comparison, and set of effects. They are not a rule for predicting the price change from a different tariff, product, or market.
How tariffs can affect a product through its supply chain
A tariff can apply to a consumer product or to an input used to make another good. For example, a manufacturer may face higher costs if imported steel, aluminum, or parts become more expensive, even if the finished product it sells is not itself tariffed. A separate duty can apply when a finished product is imported. Whether a charge applies depends on the import entry, product classification, origin, and relevant customs rules; components are not automatically charged multiple times merely because they pass through several production stages.
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The Bank of Canada’s explanation uses vehicles to show how duties on materials, parts, and finished vehicles can affect final prices. It describes the importer as the party that pays the tariff, while noting that importers and suppliers may absorb some costs through reduced margins and that some costs may be passed on to consumers.
What else tariffs can change
Tariffs affect more than checkout prices. They may benefit import-competing industries, while shifting workers, capital, and other resources away from other sectors. Firms that rely on imported inputs can face higher costs, including exporters competing in overseas markets. Exchange-rate movements can also change the relationship between domestic prices and export competitiveness. Trading partners may retaliate with tariffs on the first country’s exports, extending the effects. These are possible channels, not guaranteed results in every case.
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Clear out junk files and repair common Windows errorsFree Scan →Scan for outdated or missing drivers - takes under a minuteDriver Scan →A tariff can cause a one-time increase in the price level as higher costs work through the economy. That increase alone does not establish ongoing inflation, which depends on how prices, wages, expectations, and later costs evolve. At the same time, tariffs can slow activity and reduce demand, putting downward pressure on some prices even as higher costs push others upward.
Tariffs are not necessarily a remedy for an overall trade deficit. The WTO’s discussion of what tariffs do says aggregate trade imbalances reflect national saving and investment, and that most economists expect tariffs to have limited effect on those imbalances compared with macroeconomic fundamentals.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How to check the tariff for a specific shipment
There is no single tariff rate that applies to every product or shipment. The answer depends on the importing jurisdiction, product classification, origin, destination, trade agreement or preference eligibility, and effective date. Compare rates only when those details match.
- Applied rate: the duty currently charged on imports, subject to the product, origin, and any applicable preferences.
- Bound rate: the maximum rate a WTO member has committed to under its schedule. It may be higher than the applied rate and is not necessarily the rate charged on a shipment today.
The WTO’s Tariff & Trade Data platform covers more than 150 economies and provides applied rates, bound commitments, import data, and preferential rates. Update timing varies by data source, from daily to monthly. Products are identified using Harmonized System (HS) codes, standardized internationally through six digits; countries may add more detailed national distinctions. For a transaction, confirm the classification and current duty with the importing country’s customs authority or a customs broker.
World Tariff Profiles 2025, from the WTO, the International Trade Centre, and UNCTAD, offers a published comparison covering more than 170 countries and customs territories. Its tariff figures are as of end-2024, so use it for historical comparison rather than as a live rate checker.
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