In simple terms
A tariff is a tax on goods crossing a border into a country. The importer pays it to the government, usually as a percentage of the shipment value.
The World Trade Organization describes tariffs as customs duties that give goods made at home a price advantage over similar goods brought in from abroad.
How it works
Every traded product sits in a numbered category, and each category carries a rate. Governments publish those rates in long schedules of commitments.
Three numbers matter. The bound rate is the ceiling a WTO member has promised not to exceed. The applied rate is what it charges today, and it can sit well below that ceiling. The gap between the two is called binding overhang, and it is generally wider for developing countries, leaving more room to raise duties without breaking any commitment.
Rates also differ by trading partner. The most favored nation rate is what a member promises to all other members. Lower preferential rates apply inside free trade agreements, or under schemes for developing countries, and are often zero. The lowest rate a product can actually attract is called the effectively applied tariff.
So there is no single tariff on a product. There is a rate per product, per country of origin, per agreement.
Why it matters
A tariff lands on the price of a finished good, so shoppers meet it at the till even though the importer wrote the check.
Manufacturers meet it twice, because parts and materials cross borders too, and a duty on an input raises the cost of everything built from it.
Governments use tariffs to raise revenue, to shelter an industry, or as leverage in a dispute. Because applied rates can be lifted toward the bound ceiling quickly, they are also one of the fastest tools in a trade fight.
Where you will see it
- Customs paperwork and import invoices.
- Trade agreement texts and schedules of concessions.
- News coverage of trade disputes and retaliation.
- Price notices from importers explaining an increase.
Example
A bicycle arrives in a country whose applied rate on bicycles is 10 percent. The importer pays that duty on the declared value, and the shop shelf price reflects it.
Often confused with
A tariff is a tax on an import. A quota is a limit on how much may enter at all. A sanction blocks trade for political reasons rather than pricing it.
Key facts
- The WTO describes tariffs as customs duties on merchandise imports that give locally produced goods a price advantage over imported ones.1
- Bound rates are the ceiling rates listed in a member schedule of commitments, while applied rates are what a member currently charges and can be lower.1
- A bound tariff is the maximum most favored nation tariff level for a given commodity line.2
- The gap between bound and applied rates is called binding overhang, and it is generally larger in developing countries.2
- The effectively applied tariff is the lowest rate available on a product: the preferential rate where one exists, otherwise the most favored nation rate.2
Related concepts
In the news
Quick checkWhat is the difference between a bound tariff and an applied tariff?Show answer
The bound rate is the ceiling a country has promised not to exceed. The applied rate is what it actually charges, and it can be lower.
Sources
- World Trade Organization. Tariffs. Undated (accessed 27 September 2026)
- World Bank, World Integrated Trade Solution. Types of Tariffs. Undated (accessed 27 September 2026)
Editorially reviewed by Specialty Digest Editorial TeamLast reviewed September 27, 2026Researched and drafted with AI assistanceReport an issue