Anti-Dumping Duty

An anti-dumping duty (ADD) is a customs tariff applied by an importing country to foreign goods that are being sold below their fair market value — a practice known as dumping. Anti-dumping duties are designed to level the playing field for domestic manufacturers by making artificially cheap imports more expensive.

What is Dumping?

Dumping occurs when an exporter sells products in a foreign market at prices lower than either:

• The price charged in the exporter's home market, or
• The cost of production (including reasonable profit margin)

This is often a deliberate strategy to capture market share, drive out local competition, or dispose of excess inventory. It can cause material injury to domestic industries that cannot compete with below-cost pricing.

How Anti-Dumping Duties Work

Anti-dumping investigations are typically initiated by domestic industry petitions or government agencies. In the United States, the Department of Commerce (DOC) determines whether dumping has occurred and calculates the dumping margin. The International Trade Commission (ITC) determines whether the domestic industry has been materially injured.

If both findings are affirmative, the DOC issues an anti-dumping order imposing a duty equal to the dumping margin — sometimes 20%, sometimes 200% or more.

Major Anti-Dumping Cases

Some of the most significant recent ADD cases:

• Solar panels from China: The US and EU have imposed anti-dumping duties ranging from 30% to over 200% on Chinese solar panels
• Steel and aluminum: Multiple ADD orders on Chinese, South Korean, and other steel products
• Mattresses: The US has imposed ADD on mattresses from Cambodia, Indonesia, Malaysia, Serbia, Thailand, Turkey, and Vietnam

Impact on Importers and Supply Chains

For businesses importing goods subject to ADD investigations, the risk is significant:

• Duties can be applied retroactively to entries made during the investigation period
• Rates can change annually based on administrative reviews
• A product classification change can sometimes avoid ADD, but misclassification risks are high
• Country-hopping (routing production through a third country to avoid ADD) is closely monitored and can result in anti-circumvention duties

Anti-Dumping vs. Countervailing Duties

Anti-dumping duties address below-cost pricing by private companies. Countervailing duties (CVD) address government subsidies that allow foreign companies to undercut domestic prices. The two are often applied simultaneously on the same product categories.