Antidumping and countervailing duty orders add large extra duties to specific products from specific countries, and the rates can change after annual reviews. Importers who do not track orders covering their goods face retroactive bills that erase years of margin.
Antidumping duties respond to goods sold in the US below fair value, and countervailing duties respond to foreign government subsidies. After investigations, an order sets company specific and country wide rates for the covered product and country pair, collected as cash deposits at entry.
The deposit is an estimate, not the final bill. Commerce reviews rates periodically, and the final liability for an entry year is set at liquidation, sometimes years later, at rates that can be far from the deposit. An importer can pay the deposit correctly and still owe a large true up.
Orders define covered goods in detailed scope language, and products are in or out based on physical characteristics, not tariff headings alone. A heading can be partly covered, and a small product change can move an item across the scope line in either direction.
That cuts both ways. Assuming your product is covered when it is not overpays duties for years. Assuming it is out when it is in builds a liability that surfaces at liquidation with interest. Scope rulings exist for exactly this question, and getting one beats guessing.
Orders, review schedules, and rate changes are published in official notices, and the signal is easy to miss in a busy import operation. Assign ownership: one person or service watches new orders, review initiations, and preliminary and final results for the product country pairs you actually import.
Calendar the review cycle for your entries. Knowing that a rate review is under way, and roughly when liquidation will follow, turns a surprise bill into a forecast reserve. Finance should see expected exposure ranges, not discover them in a customs notice.
Sourcing shifts that look purely commercial, a new factory country, a new supplier, a minor product redesign, can move goods into or out of an order. Every sourcing change needs a duty review that includes orders, not just the base tariff rate the purchasing team negotiated on.
Watch transshipment risk in your own supply chain. Goods routed through a third country to escape an order create severe liability for the importer of record, and not knowing is a weak defense when your supplier arranged it. Verify origin claims on covered product categories with documents, not assurances.
Importers with real exposure carry a duty reserve for open entry years, sized from the review ranges in play. That reserve, plus complete entry and scope records, is what separates an unpleasant true up from a business threatening one.
Keep the file as if an auditor will read it: scope analysis, rulings, supplier origin evidence, entry summaries, and liquidation results. In this corner of customs, the companies that survive rate shocks are the ones whose paperwork was boring for years before it mattered.
Keep reading: How do importers prepare for an announced tariff rate change before it takes effect?, How do importers audit past entries for duty overpayments they can recover?, and How do importers track tariff classification rulings that affect their products? cover the nearby cases in this series.
Antidumping duties counter goods sold below fair value, and countervailing duties counter foreign government subsidies. Both are set by product and country after investigations, and both sit on top of normal customs duties.
Because deposits are estimates. Final liability is set when entries liquidate after periodic reviews, sometimes years later, and the reviewed rate can differ sharply from the deposit, leaving a true up bill or a refund.
By the order scope language, which turns on physical characteristics rather than tariff headings alone. When the answer is unclear, a formal scope ruling beats guessing, because both overpaying and underpaying carry real costs.
Track review schedules, reserve for plausible true up ranges on open years, and keep complete scope and origin records. Finance should see the exposure forecast before liquidation turns it into a bill.