A tariff is a tax on imported goods, collected by the government when products cross the border into a country. In the United States, tariffs are collected by US Customs and Border Protection (CBP) and paid by the importer — not by the foreign country or foreign manufacturer. Tariffs have been in the news constantly since 2025, but many people still misunderstand the basics. This guide explains everything in plain language: what tariffs are, how they work, who really pays, and what rates apply in 2026.
Tariff Definition: A Tax on Imports
A tariff is a tax imposed by a government on goods imported from another country. When a US company imports a product — say, a container of electronics from China or a shipment of wine from France — the importer must pay a tariff to US Customs and Border Protection before the goods can enter the country. The tariff is calculated as a percentage of the value of the goods (called an 'ad valorem' tariff), a fixed dollar amount per unit (called a 'specific' tariff), or a combination of both (called a 'compound' tariff). The revenue collected goes to the US Treasury. In fiscal year 2025, tariffs generated over $100 billion in revenue for the federal government.
Types of Tariffs: Ad Valorem, Specific, and Compound
There are three main types of tariffs. Ad valorem tariffs are the most common — they're calculated as a percentage of the imported goods' value. For example, the current 10% Section 122 tariff means you pay 10% of your shipment's declared customs value. If you import $100,000 worth of furniture, you owe $10,000 in tariff. Specific tariffs are a fixed dollar amount per unit of quantity — for example, $0.50 per kilogram or $2.00 per pair of shoes. These are common for agricultural products and some consumer goods. Compound tariffs combine both: a percentage of value PLUS a per-unit charge. For example, a compound tariff might be '10% plus $1.50 per kilogram.' The HTS (Harmonized Tariff Schedule) specifies which type applies to each product.
Who Actually Pays Tariffs? (Hint: Not Foreign Countries)
This is the most misunderstood aspect of tariffs. Tariffs are paid by the US importer — the American company that buys goods from overseas. China, Mexico, Germany, and other countries do not write checks to the US government. Here's how it works: A US company orders goods from a foreign supplier. The goods arrive at a US port. The importer (or their customs broker) files an entry with CBP declaring the goods and their value. CBP calculates the tariff owed. The importer pays the tariff to CBP. Only then are the goods released. The cost is ultimately shared between the importer, who may absorb it as lower margins, and the consumer, who may pay higher retail prices. Studies consistently show that approximately 90-95% of tariff costs are passed through to US consumers in the form of higher prices.
How Tariffs Affect Prices
When tariffs increase, prices typically rise for consumers. The math is straightforward: if a product costs $50 from a foreign manufacturer and faces a 25% tariff, the importer pays $12.50 in duty. That $12.50 gets added to the product's cost, and after retail markup, the consumer might see a $15-20 price increase. Real-world examples in 2026: A washing machine from South Korea that cost $800 before tariffs now costs roughly $880 after the 10% Section 122 tariff. A Chinese-made laptop that costs $500 at the factory might face 10% Section 122 plus 25% Section 301, adding $175 in tariffs — which translates to roughly $200 more at retail. However, tariffs can also make domestically manufactured goods more competitive by raising the price of foreign alternatives. This is one of the stated goals of tariff policy.
The Current US Tariff Structure (2026)
The US currently has several layers of tariffs that can stack on top of each other. MFN (Most Favored Nation) base rates are the standard tariff rates in the Harmonized Tariff Schedule, averaging about 3.4% across all products. These apply to all WTO member countries. Section 122 tariff adds a flat 10% on imports from virtually all countries (signed February 2026, expires July 2026). Section 232 tariffs target specific products for national security: steel 50%, aluminum 50%, copper 50%, autos 25%, semiconductors 25%, lumber 10%. These apply to all countries. Section 301 tariffs target China specifically, adding 25-100% on most Chinese goods. Trade agreement rates (like USMCA) can reduce or eliminate tariffs for qualifying goods from partner countries. These layers stack — so a product could face the MFN base rate + Section 122 + Section 232 + Section 301 simultaneously.
Tariffs vs. Duties vs. Taxes: What's the Difference?
People often use 'tariff,' 'duty,' and 'import tax' interchangeably, and for most purposes they mean the same thing — a government charge on imported goods. Technically, a 'tariff' refers to the schedule of rates (the Harmonized Tariff Schedule), while 'duty' refers to the actual amount paid. So you look up the tariff rate and then pay the duty. 'Customs duty' and 'import duty' are the same thing. 'Import tax' is a colloquial term for the same concept. However, tariffs/duties are distinct from other import-related charges: the Merchandise Processing Fee (MPF) is a small CBP processing charge (0.3464% of value), and the Harbor Maintenance Fee (HMF) is 0.125% of cargo value for ocean shipments. Sales tax and VAT are separate state/local taxes that apply after the goods have cleared customs.
How to Calculate Your Import Duty
Calculating your import duty requires three pieces of information: the HTS code for your product (which determines the base rate), the country of origin (which determines additional tariffs like Section 122, 232, or 301), and the customs value of your shipment (declared value of the goods). The formula is: Total Duty = Customs Value x (MFN Rate + Section 122 Rate + Section 232 Rate + Section 301 Rate). For example, importing $50,000 of consumer electronics from China: MFN rate 0% (many electronics are duty-free at MFN level) + Section 122 at 10% ($5,000) + Section 301 at 25% ($12,500) = $17,500 total duty (35% effective rate). Use our free tariff calculator to get an instant estimate for any product and country combination.
Why Governments Use Tariffs
Governments impose tariffs for several reasons. Revenue generation: tariffs are a source of federal revenue, generating over $100 billion annually. Protecting domestic industry: by making imports more expensive, tariffs can help domestic manufacturers compete on price. National security: Section 232 tariffs on steel, aluminum, and semiconductors are justified on national security grounds — maintaining domestic production capacity for critical materials. Trade negotiation leverage: tariffs can be used as bargaining chips in trade negotiations, encouraging other countries to lower their own trade barriers. Addressing trade imbalances: the stated goal of many 2025-2026 tariffs was to reduce the US trade deficit, particularly with China. Retaliating against unfair trade practices: Section 301 tariffs target countries engaged in practices like intellectual property theft or forced technology transfer.
Key Takeaway
A tariff is simply a tax on imports, paid by the US importer and typically passed on to consumers through higher prices. In 2026, US importers navigate a complex multi-layered system: MFN base rates, 10% Section 122, product-specific Section 232 tariffs, and China-specific Section 301 tariffs. Understanding which rates apply to your products is the first step to managing import costs. Use our tariff calculator to estimate your duty for any product and country.
Calculate Your Import Duty
Get an instant estimate for your specific product, country, and shipment value.
Open Tariff Calculator