Tariffs & Duties
Anti-Dumping & Countervailing Duties (AD/CVD): The Complete Importer's Guide
AD/CVD orders are separate from Section 301 tariffs — and often far more damaging. Rates above 200% are common, they can apply retroactively, and CBP can bill you months or years after entry. Here's how the system works, how to check your exposure, and how importers protect themselves.
For most importers, the scariest line item in international trade isn't the regular duty rate or even Section 301 tariffs — it's anti-dumping and countervailing duties (AD/CVD). These are special trade-remedy duties that can add anywhere from a few percent to more than 300% to your landed cost, apply to shipments that already cleared customs, and generate a bill from CBP long after you thought a transaction was closed.
This guide explains what AD/CVD duties are, why they exist, how they're calculated and collected, how to find out whether your product is covered, and the practical steps importers take to manage the risk.
What Are Anti-Dumping Duties?
Anti-dumping (AD) duties are imposed on imported goods sold in the US at less than their “normal value” — essentially, priced below what the same goods sell for in the exporter's home market, or below the cost of production. The US treats this as an unfair trade practice that injures domestic industry.
The process involves two federal agencies. The US Department of Commerce (Commerce) investigates whether dumping occurred and calculates a “dumping margin” — the percentage by which the fair price exceeds the US price. The US International Trade Commission (ITC) determines whether that dumping materially injures, or threatens to injure, a US industry. If both find in the affirmative, Commerce issues an anti-dumping order, and importers must post a cash deposit equal to the dumping margin on every covered shipment.
What Are Countervailing Duties?
Countervailing duties (CVD) address a different unfair practice: foreign government subsidies. When a government subsidizes an industry through cheap loans, tax rebates, grants, or below-market inputs like land, energy, or raw materials, exporters can undercut US prices artificially. Commerce calculates a countervailing duty rate equal to the value of the subsidy, and, as with AD, it's collected as a cash deposit at entry.
AD and CVD petitions are frequently filed together against the same product and country, which is why the two are almost always discussed as a pair: AD/CVD. For a side-by-side breakdown, see our dedicated guide on the difference between anti-dumping and countervailing duties.
How AD/CVD Differs from Section 301 and Regular Duties
Importers often lump all import taxes together, but AD/CVD behaves very differently from the duties you're used to:
| Regular / Section 301 | AD/CVD | |
|---|---|---|
| Set by | Statute / USTR | Commerce (case-by-case) |
| Basis | HTS code | Product scope + country + producer |
| Rate | Fixed % | Company-specific, revised yearly |
| Final at entry? | Yes | No — trued up later |
| Typical range | 0–25% | A few % to 300%+ |
The most important row is the fourth one. Regular and Section 301 duties are final when your goods clear customs. AD/CVD deposits are just estimates. The actual rate is set later through a review, and the difference is billed or refunded — a process called liquidation that can happen a year or more after entry.
How AD/CVD Duties Are Calculated and Collected
The cash deposit
When you import a product covered by an order, CBP collects a cash deposit at the deposit rate assigned to your specific exporter/producer. If your supplier has its own calculated rate, you pay that. If it doesn't, you typically pay the higher “all-others” or country-wide rate — which is why sourcing from a producer with a favorable rate matters enormously.
Retroactive liquidation
The deposit is not the end of the story. Each year, Commerce can conduct an administrative review that recalculates the actual duty owed for the prior period. If the reviewed rate is higher than what you deposited, CBP bills you the difference — potentially long after you sold the goods. If it's lower, you get a refund with interest.
How to Tell If Your Product Is Covered
This is where many importers get caught. An AD/CVD order is defined by a written scope — a description of the products it covers — not simply by an HTS code. The order lists HTS codes “for convenience,” but the legal test is whether your product matches the scope language. That means:
- A product can fall under an order even if its HTS code isn't on the list, if it matches the scope description.
- A product sharing an HTS code with covered goods may not be covered if it falls outside the scope.
- When it's genuinely unclear, an importer can request a formal scope ruling from Commerce.
To screen for exposure, check your HTS code and country of origin against active orders using CBP's AD/CVD search tool, Commerce's ACCESS/ADCVD portal, and ITC resources. Our step-by-step walkthrough covers exactly how: how to check if your product has AD/CVD duties.
Rates: Why They Vary So Much
AD/CVD rates are producer-specific. A cooperative exporter that participated in Commerce's investigation may receive a low, calculated rate; a non-responsive exporter can be hit with an “adverse facts available” (AFA) rate that is punitively high — sometimes several hundred percent. The country-wide rate that applies when no specific rate exists is often the worst case. For how these numbers are derived and current examples, see anti-dumping duty rates explained.
Evasion and Transshipment Risk (EAPA)
Because the duties are so high, some suppliers try to evade them — routing Chinese goods through a third country and relabeling the origin, or mislabeling the product. Under the Enforce and Protect Act (EAPA), CBP investigates evasion, and importers found to have entered goods through evasion face duty bills plus penalties, even if they didn't know. This makes supplier due diligence and honest country-of-origin determination essential.
What Importers Should Actually Do
- Screen before you source. Check AD/CVD exposure at the product-selection stage, not after a container is on the water.
- Know your producer's rate. The same product from two factories can carry wildly different deposit rates. Source toward the favorable one.
- Reserve for the true-up. Treat the deposit as a floor, not the final cost, and hold reserves against a higher reviewed rate.
- Document origin rigorously. Your evidence of where goods were actually made is your defense in an EAPA case.
- Get a scope ruling when it's close. Certainty from Commerce is cheaper than a retroactive bill.
Frequently Asked Questions
What is an anti-dumping duty in simple terms?
It's an extra US import duty on goods sold here below their fair market value abroad. It levels the playing field for domestic producers and is collected as a cash deposit on every covered shipment.
Are AD and CVD the same thing?
No. Anti-dumping targets unfairly low pricing; countervailing targets foreign government subsidies. They're calculated separately but often applied together to the same product.
How do I find out if my product is affected?
Match your HTS code and country of origin against active orders via CBP, Commerce ACCESS, and the ITC — then confirm against the order's written scope. Our checking guide walks through each source.
Can AD/CVD really apply retroactively?
Yes. Deposits are estimates; Commerce's annual reviews set the actual rate, and CBP bills or refunds the difference at liquidation — often a year or more after entry.
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