What is Antidumping Duty (ADD)?
Antidumping Duty (ADD)
An antidumping duty is an additional tariff that a government places on imported goods when a foreign manufacturer sells those goods below fair market value. The U.S. Department of Commerce calculates the duty rate. U.S. Customs and Border Protection collects it at the border. The importer of record pays it. Antidumping duties protect domestic industries from unfair foreign pricing and are among the most frequently used trade remedies in the United States.
For importers, trade compliance professionals, and supply chain managers, that makes antidumping duty a direct cost and compliance issue that can affect cash flow, landed cost, supplier choices, and penalty risk. This article explains how antidumping duties work, how to determine whether a product is covered by an active antidumping order, what cash deposit rates mean in practice, how antidumping duties differ from countervailing duties, the main compliance challenges, and how technology can help manage the process.
What Is Antidumping Duty Under Trade Remedy Laws?
Antidumping duty is a trade enforcement tool. It applies when a foreign company exports a product to the United States at a price lower than the price it charges in its own home market, or below its cost of production. That practice is called dumping.
A standard customs duty applies to all imported goods based on their HTS classification. An antidumping duty is different. It is an additional charge layered on top of the regular duty. Its purpose is specific: offset the price gap between the dumped import price and the product’s normal value in the exporting country.
The legal foundation for antidumping duties in the U.S. sits in the Tariff Act of 1930, as amended. The World Trade Organization’s Anti-Dumping Agreement regulates how member countries apply these duties to prevent arbitrary or retaliatory use. The goal is to restore fair competition, not to block trade outright.
As of 2025, the U.S. Department of Commerce maintains over 770 active antidumping and countervailing duty orders covering imports from dozens of countries. That number has grown steadily over the past decade.
Why Are Antidumping Duties Imposed as Trade Remedies?
Governments impose antidumping duties when foreign manufacturers sell goods at unfairly low prices and that pricing causes measurable harm to a domestic industry. The harm could be lost sales, reduced market share, factory closures, or workforce reductions.
Without these duties, a foreign producer could flood a market with below-cost goods, undercut local manufacturers, and drive them out of business. Antidumping duties raise the landed cost of dumped imports so that domestic producers can compete on a level playing field. The duty amount is calibrated to the dumping margin: the difference between the product’s normal value and its export price to the United States.
How Do I Know If My Product Is Subject to ADD?
This is the most critical question for any importer. Missing an active antidumping duty order can result in surprise bills, penalty assessments, and shipment delays. Here is how to check.
Identify the Product
Start with the specific product you are importing. Antidumping orders are product-specific. An order on steel nails from China does not apply to steel wire from China.
Check Active ADD Orders
The International Trade Administration maintains a searchable database of all active AD/CVD orders on its website. Search by product type, HTS code, or country of origin. The database lists every active order, investigation, and suspension agreement.
Determine Country of Origin
Antidumping duties are country-specific. The same product can carry a 0% duty from one country and over 200% from another. Country of origin is based on where the product was manufactured or substantially transformed. Transshipment through a third country does not change the origin for antidumping purposes.
Review Scope Language
Every antidumping order has scope language. This is the legal description of exactly which products are covered. Scope language can be narrow or broad. Read it carefully. If your product falls within the scope, the duty applies regardless of how you classify it on your entry.
Verify HTS Classification
Your HTS code must align with the tariff categories listed in the antidumping order. Misclassification is one of the most common compliance errors. If you classify a product under the wrong heading and miss the AD flag, you face retroactive duty assessments plus potential penalties from CBP.
Common Mistakes
Importers frequently trip up in the following areas.
- First, assuming that because a supplier is new, no order applies (the order covers the product, not the supplier).
- Second, relying on a freight forwarder’s classification without independent verification.
- Third, ignoring scope rulings that expanded the original order to cover additional product variations.
What Is a Cash Deposit Rate and Maturity Date?
The cash deposit rate is the estimated antidumping duty rate that an importer pays upfront at the time of entry. Think of it as a security deposit. The final duty amount is determined later during an administrative review. The importer either pays the difference or receives a refund.
How Cash Deposits Work
When goods subject to an antidumping duty order enter the United States, CBP collects a cash deposit based on the current estimated rate. This deposit is held until Commerce completes an administrative review of the exporter’s actual sales data for that period. The review can take 12 to 18 months or longer.
Company-Specific Rates vs. Country-Wide Rates
Not all exporters receive the same rate. The table below breaks down the three rate categories:
| Rate Type | How It Is Set | Who It Applies To |
| Company-specific rate | Based on the individual exporter’s dumping margin calculated during investigation or review | The specific foreign producer or exporter that was individually examined |
| All-others rate | Weighted average of individually investigated companies’ rates | Foreign producers or exporters not individually examined but cooperating |
| Country-wide rate | Often the highest rate, based on adverse facts available | Companies that did not cooperate with the investigation or are unknown |
If your supplier has a company-specific cash deposit rate of 8.5%, you deposit 8.5% of the entered value at the time of import. If your supplier has no individual rate, the country-wide rate applies, and that can be significantly higher.
Why Rates Change
Cash deposit rates are not static. They update after each administrative review. Commerce recalculates rates based on actual pricing and cost data from the review period. A rate of 15% this year could drop to 5% or jump to 40% after the next review. Sunset reviews, conducted every five years under the Tariff Act of 1930, determine whether the entire order should continue or be revoked.
Impact on Landed Cost
Antidumping duties directly increase your landed cost. A 25% cash deposit rate on a $100,000 shipment means $25,000 in additional duty at entry, on top of the standard customs duty. That amount is locked up until the review is complete. For importers managing tight margins or seasonal inventory, this cash flow impact can be substantial.
ADD vs. Countervailing Duties (CVD)
Antidumping duties and countervailing duties are both trade remedy laws, but they target different problems.
- An antidumping duty addresses unfair pricing by a foreign company. The company sells below fair value. The duty offsets the dumped price.
- A countervailing duty addresses unfair government subsidies. A foreign government provides financial assistance (grants, tax breaks, below-market loans) to its manufacturers, allowing them to undercut competitors. The CVD offsets the subsidy amount.
A product can be subject to both ADD and CVD simultaneously. For example, certain steel products from specific countries carry both an antidumping order and a countervailing duty order. The combined rate stacks on top of the regular customs duty.
The third traditional trade remedy is safeguard measures, which protect domestic industries from sudden surges of fairly traded imports. Section 232 (national security tariffs) and Section 301 (unfair trade practices) are separate statutory authorities and are not classified as traditional trade remedies under the WTO framework.
Why Antidumping Duties Matter for Importers
- Higher import costs: Antidumping duties can add anywhere from single digits to over 200% on top of regular duties. For products like Chinese solar cells, certain steel products, or aluminum extrusions, rates can be steep enough to make sourcing from a particular country unviable.
- Cash flow impact: Cash deposits tie up working capital at the time of entry. If Commerce later assesses a higher final rate, the importer owes the difference. If the rate drops, the refund takes months to process.
- Compliance risk: Failing to declare AD-liable goods can trigger CBP enforcement actions, including penalties, seizures, and increased audit scrutiny. The Trade Remedy Branch at U.S. Customs and Border Protection coordinates enforcement of all trade remedy programs and collaborates with partner government agencies to identify evasion.
- Supply chain decisions: Antidumping orders can shift entire sourcing strategies. Importers routinely evaluate alternative countries of origin to avoid high duty rates. Accurate, real-time visibility into active orders and current cash deposit rates is a competitive advantage.
How Technology Helps Manage ADD Compliance
Manually tracking antidumping duty orders, scope rulings, cash deposit rates, and review timelines across hundreds of product categories and dozens of countries is not sustainable.
Trade compliance platforms like KlearNow.AI automate critical steps: monitoring active AD/CVD orders, screening products against current orders during entry filing, tracking cash deposit rate updates, calculating landed costs that factor in AD/CVD exposure, and flagging HTS classification mismatches that could indicate missed AD liability.
Frequently Asked Questions
What is an antidumping duty?
An antidumping duty is an additional tariff imposed on imported goods that are sold in the U.S. at less than fair market value, designed to protect domestic industries from unfair foreign pricing.
How do I know if my product is subject to ADD?
Search the International Trade Administration’s AD/CVD orders database by product, HTS code, or country of origin, and review the scope language of any active order.
What is a cash deposit rate?
A cash deposit rate is the estimated antidumping duty percentage that an importer must pay at the time of entry, which is later adjusted based on the results of an administrative review by the Department of Commerce.
How are antidumping duties calculated?
The Department of Commerce calculates the dumping margin by comparing the product’s export price to the United States with its normal value in the home market or its cost of production.
Who determines antidumping duty rates?
The Department of Commerce determines whether dumping exists and calculates the margin, while the U.S. International Trade Commission determines whether the dumping causes material injury to a domestic industry.
Can antidumping duty rates change?
Yes. Rates are updated through annual administrative reviews based on actual sales data, and entire orders face sunset reviews every five years under the Tariff Act of 1930.
What is the difference between ADD and CVD?
Antidumping duties address unfair pricing by foreign manufacturers, while countervailing duties offset unfair government subsidies provided to foreign producers.
Can software help identify ADD exposure?
Yes. Trade compliance platforms like KlearNow.AI screen products against active antidumping orders, track cash deposit rate changes, and flag potential classification issues during entry filing.