Some products carry a duty that has nothing to do with your tariff code, your origin, or anything you can plan for

Key takeaways

• Antidumping and countervailing duties are separate from the tariff stack. They apply to specific products from specific countries under individual orders, at rates set case by case.
• formal entry as required for goods subject to antidumping or countervailing duties regardless of shipment value — so the informal entry route is unavailable.
• Country of origin for AD/CVD purposes is determined by substantial transformation, per CBP guidance — the same test as Section 301, and the same reason routing does not solve it.
• an expanding docket of antidumping cases as part of the 2026 trade environment.
• This is a check to run before sourcing, not a risk to manage afterwards. Rates in these cases can exceed the value of the goods, and liability runs to the importer of record.

Every other duty on this site is predictable once you know the code and the origin. This one is not, and it is the reason a product can look viable on every calculation and still be uneconomic.

This is not legal advice, and AD/CVD is an area where the consequences of getting it wrong are severe enough that specialist input is not optional.

01What they are

Antidumping duties (AD) are imposed where goods are found to be sold into the United States below fair value.

Countervailing duties (CVD) are imposed where foreign producers are found to be subsidized.

Both are product-and-country specific. An order covers a defined class of merchandise from a named country, and rates are set through investigations — often at company level, so two suppliers in the same country can carry very different rates for the same product.

02Why they behave differently from tariffs

They are not in the tariff schedule. You cannot look up your HTS code and see them. Determining whether an order covers your product requires checking the scope of active orders — a separate exercise from classification.

Scope is written in words, not codes. An order describes the merchandise it covers, and whether your product falls inside that description is an interpretive question. Products that seem outside an order sometimes are not.

Rates can be extreme. Because they are calculated to offset a margin of dumping or a subsidy rather than to raise revenue, they are not bounded the way ordinary duty rates are.

And they are retroactive in effect. Entries can be subject to review after the fact, with the final rate determined later than the entry.

03The entry consequence

formal entry is required for goods subject to antidumping or countervailing duties, regardless of shipment value.

That removes an option the entry types guide describes: no informal Type 11 route, no matter how small the shipment. Formal entry means the full Merchandise Processing Fee basis, a customs bond, and broker involvement on every shipment.

Which changes the arithmetic on low-value imports of a covered product entirely.

04Origin, and why routing does not help

Reporting on CBP guidance is direct: when considering a product that may be subject to antidumping, countervailing or other safeguard measures, the substantial transformation analysis is applied to determine the country of origin.

Same test as Section 301, same answer as the country of origin guide: assembling in a third country from covered components does not remove the exposure unless the transformation is genuine.

And the enforcement posture is harder here. Evading an AD/CVD order is a distinct and seriously treated offense, and CBP scrutiny of third-country routing as having increased.

05What is changing

the 2026 trade environment as including an expanding docket of antidumping cases, alongside revised Section 301 rates and restructured de minimis treatment.

The practical implication: a product not covered by any order when you sourced it can become covered. New orders apply going forward, and a supplier relationship built around a product that becomes covered is a business problem rather than a paperwork one.

One source’s framing is the right one: country of origin rules, Section 301 exposure and AD/CVD orders interact in ways that are genuinely complex and have real financial consequences.

06How to check

Before sourcing, not after. This is the single most important thing in this guide.

The check involves:

Identifying whether an active order covers your product class from your sourcing country. Order scopes are published, and a customs broker or trade attorney can run this.

Checking company-specific rates where an order exists. Rates frequently differ by producer, and the rate that applies depends on which company made your goods — which means your supplier verification work feeds directly into this.

Confirming the origin analysis where components come from a covered country but assembly happens elsewhere.

Asking your broker as a standing question on any new product from a new country. It costs one email and it is the cheapest check in this guide.

07Where this sits

For most marketplace sellers, most of the time, AD/CVD does not apply. The categories most often affected are industrial and commodity goods rather than consumer products.

But “most” is doing work in that sentence. Orders cover a wide range of merchandise, and the categories that catch consumer sellers are not always obvious. The check is cheap; the consequence of skipping it is a duty rate you cannot pass on and did not model.

And it belongs in the product research stage, alongside the classification and landed cost work — see the product research guide on validating cost before demand.

08What to do

Ask your customs broker whether any active AD/CVD order covers your product class from your sourcing country. Before the purchase order, on every new product and every new country.

Get the company-specific rate if an order exists. Which factory made the goods can change the answer.

Do not assume a sourcing shift removes exposure. The origin test is substantial transformation, and CBP applies it specifically for these measures.

Budget for formal entry on any covered product — the informal route is not available regardless of value.

Re-check periodically. The docket is expanding, and a product outside every order today may not be next year.

Take any suggestion of routing around an order seriously as a warning sign. A supplier proposing it is proposing something with consequences that land on the importer of record.

Search your product’s HTS heading in the ITA’s AD/CVD orders list before you place the next order. Ten minutes, and it is the only way to find out whether a duty that has nothing to do with your tariff code is waiting at the port.

Frequently asked

What are antidumping and countervailing duties?

Additional duties imposed under individual orders — antidumping where goods are sold below fair value, countervailing where producers are subsidized. They cover defined merchandise from named countries at rates set case by case, often at company level.

How do I know if my product is covered?

Not from your HTS code. Order scopes are written descriptions of covered merchandise and must be checked separately. Ask a customs broker or trade attorney before sourcing, on every new product and country.

Can I avoid AD/CVD by sourcing from another country?

Only through genuine substantial transformation. Reporting on CBP guidance states the substantial transformation analysis is applied specifically to determine origin for antidumping, countervailing and other safeguard measures.

Does it affect how I enter the goods?

Yes. formal entry is required for goods subject to antidumping or countervailing duties regardless of shipment value, which removes the informal entry route and requires a bond and broker involvement on every shipment.

Are rates capped?

No. They are calculated to offset a dumping margin or a subsidy rather than to raise revenue, so they are not bounded the way ordinary duty rates are, and they can exceed the value of the goods.

Does this affect most Amazon sellers?

Most of the time, no — the categories most often covered are industrial and commodity goods. But orders cover a wide range of merchandise, the docket is expanding, and the check costs one email against a rate you could not pass on.

Sources

1. Antidumping and countervailing duty orders: scope, cash deposit rates and administrative reviews (19 U.S.C. 1671, 1673); AD/CVD case search, U.S. Department of Commerce, International Trade Administration; U.S. Customs and Border Protection accessed 2026-09-05
2. The end of de minimis: new US entry processes (formal entry required for shipments exceeding $2,500 and for items subject to antidumping or countervailing duties), Avalara Secondary accessed 2026-09-05
3. Mexico, China and Section 301 (CBP applying the substantial transformation analysis to determine country of origin where a product may be subject to antidumping, countervailing or other safeguard measures), JD Supra Secondary accessed 2026-09-05
4. How American importers are cutting their 2026 duty bills (the 2026 environment including an expanding docket of antidumping cases alongside revised Section 301 rates and restructured de minimis treatment), Big News Network Secondary accessed 2026-09-05
5. What is country of origin? A US importer’s guide to substantial transformation (country of origin rules, Section 301 exposure and AD/CVD orders interacting in complex ways with real financial consequences), First Link Secondary accessed 2026-09-05
6. The new sourcing map for US importers in 2026 (CBP scrutiny of third-country routing and more rigorous enforcement of substantial transformation rules), Euro-American Worldwide Logistics Secondary accessed 2026-09-05