What is an antidumping duty?

It is a trade-remedy duty imposed on imports sold in the United States at less than fair value when those imports are found to injure or threaten a domestic industry.

Is antidumping duty the same as a normal tariff?

No. A normal tariff is part of the tariff schedule or a general trade program. Antidumping duty comes from a case-specific trade-remedy investigation and can vary by product, country, and supplier.

Can antidumping duty stack with other tariffs?

Yes. AD can stack with ordinary MFN duty and with other special tariff programs such as Section 122, Section 301, or Section 232 where applicable.

Antidumping Duty (AD) | TariffCenter.AI

Antidumping Duty (AD)

An antidumping duty is a trade-remedy duty the United States imposes when imported goods are sold in the U.S. market at less than fair value and those imports injure or threaten a domestic industry.

How antidumping duty works

Antidumping duties are not general tariffs. They arise from a formal investigation led by the Department of Commerce and the U.S. International Trade Commission.

In simple terms:

Commerce determines whether dumping exists
the ITC determines whether the domestic industry is injured or threatened
if both findings support relief, an AD order can be imposed

Why importers care

Antidumping duties can be very high and usually stack on top of ordinary duties and other tariff programs. They are also often product- and country-specific, which means importers need to check scope carefully instead of assuming a product is covered or not covered based on a short description.

AD versus CVD

Antidumping duty addresses below-fair-value pricing. Countervailing duty addresses unfair foreign government subsidies. Some products face one of these duties; some face both.