Antidumping Duties Explained: What Every Importer Needs to Know

If you've ever been surprised by a sudden spike in duty rates on your imports, antidumping (AD) or countervailing (CVD) duties may have been the culprit. These special duties can add 20%, 50%, or even 200%+ to your landed costs—often with little warning.

This guide explains what AD/CVD duties are, how they work, and most importantly, how to protect your business from unexpected costs.

What Are Antidumping and Countervailing Duties?

Antidumping duties (AD) are imposed when a foreign manufacturer sells goods in the U.S. at prices below their home market value—in other words, "dumping" products to gain unfair market share.

Countervailing duties (CVD) are imposed when foreign governments subsidize their exporters, giving them an unfair competitive advantage.

Both are designed to level the playing field for domestic manufacturers, but they create significant complexity for importers.

How They Differ from Regular Duties

Aspect	Regular Duties	AD/CVD Duties
Set by	Congress (HTSUS)	Commerce Dept. investigations
Applies to	All imports of that product	Specific countries/manufacturers
Rate stability	Relatively stable	Changes annually (admin reviews)
Predictability	Easy to look up	Requires research
Deposit vs. final	What you pay = what you owe	Deposits adjusted later

The Numbers: Why AD/CVD Matters

Consider steel imports from certain countries:

Cold-rolled steel (China): AD rate of 265.79%
Corrosion-resistant steel (various): Rates from 3% to 200%+
Solar panels (China): Combined AD/CVD around 50%
Honey (China): AD rate of 221.2%

A product with a 5% standard duty rate could end up with a 225%+ effective rate when AD/CVD applies. That's the difference between a profitable import and a losing proposition.

How AD/CVD Cases Work

The Investigation Process

Petition filed - U.S. industry files complaint with Commerce & ITC
Preliminary determination - Commerce investigates (within ~200 days)
ITC injury finding - Is U.S. industry being harmed?
Final determination - Commerce sets duty rates
Order issued - AD/CVD duties take effect
Annual reviews - Rates adjusted based on new data

The Deposit System

Unlike regular duties, AD/CVD uses an estimated deposit system:

At import, you deposit an estimated AD/CVD amount
Annually, Commerce conducts "administrative reviews"
After review (often 18+ months later), you receive a liquidation
You either get a refund or owe additional duties

This creates significant uncertainty—you might import at what you think is a 10% AD rate, only to learn two years later that the actual rate was 25%.

Products Commonly Affected by AD/CVD

High-Risk Categories

Steel and metals:

Cold-rolled, hot-rolled, corrosion-resistant steel
Aluminum extrusions and sheets
Carbon and alloy steel products
Steel nails, wire, pipe, tube

Manufacturing inputs:

Solar cells and panels
Crystalline silicon photovoltaics
Certain chemicals and resins
Paper products

Consumer goods:

Wooden bedroom furniture
Certain tires
Honey
Shrimp (various countries)

Industrial products:

Large power transformers
Utility scale wind towers
Oil country tubular goods

Countries Most Frequently Named

As of 2026, the countries with the most AD/CVD orders against them include:

China - 150+ active orders
India - 30+ orders
South Korea - 25+ orders
Vietnam - Growing number of recent orders
Taiwan - Various steel and aluminum products

How to Check if Your Products Are Affected

Step 1: Know Your HTS Code

Everything starts with accurate HTS classification. If you're unsure of your code, our HTS lookup guide covers the process.

Step 2: Check the AD/CVD Orders

CBP's AD/CVD Search: https://aceservices.cbp.dhs.gov/adcvdweb

Enter your HTS code to see if any AD/CVD orders apply.

Commerce Department Scope Determinations: Search for "scope rulings" if your product is borderline.

Step 3: Identify the Country of Origin

AD/CVD duties are country-specific. Steel from Country A might be duty-free while the same steel from Country B carries a 200% duty. See our country of origin determination guide for how to correctly establish origin.

Watch for transshipment: If products are routed through third countries to avoid AD/CVD, CBP will investigate. The penalties are severe.

Step 4: Identify the Manufacturer/Exporter

Rates vary by specific foreign manufacturer. A producer who cooperated with Commerce investigations may have a lower rate than one who didn't.

Key rates to know:

Individual rate - Specific to cooperating companies
All-others rate - For non-examined cooperating companies
Adverse facts available (AFA) rate - For non-cooperating companies (usually the highest)

Managing AD/CVD Risk

Before You Import

1. Due diligence on suppliers:

Ask if products are subject to AD/CVD
Request specific company rates
Verify through Commerce documentation

2. Build in contingency:

AD/CVD rates change with annual reviews
Budget for potential increases
Consider bonding requirements

3. Evaluate alternatives:

Products from non-covered countries
Different product specifications outside scope
Domestic sourcing for critical items

At Import

4. Accurate entry documentation:

Correct manufacturer identification
Proper HTS classification
Country of origin evidence

5. Work with knowledgeable broker:

AD/CVD requires specialized knowledge
Errors can result in penalties plus interest
Bonding requirements may increase

After Import

6. Track administrative reviews:

Know when your products are under review
Monitor preliminary and final results
Set aside funds for potential liability

7. Maintain records:

Keep all supplier documentation
Preserve pricing and origin evidence
Retain for 5+ years after liquidation

Common AD/CVD Mistakes

1. Assuming Your Product Isn't Covered

"It's not steel, it's a steel bracket" doesn't mean AD/CVD doesn't apply. Many orders have broad scope language that captures fabricated products.

Solution: Read the actual scope language of relevant orders, not just the title.

2. Ignoring Administrative Reviews

You deposited 15% at entry, so you're done, right? Wrong. That review might come back at 25%, and you'll owe the difference plus interest.

Solution: Track your products' review schedules. Accrue reserves for potential increases.

3. Relying on Supplier Claims

"My supplier says they're exempt" is not a defense. You (the importer of record) are responsible for the correct duty amount.

Solution: Verify rates through Commerce documentation. Get company-specific rate certifications.

4. Missing the Scope

AD/CVD orders have complex "scope" definitions. Your product might be covered even if it seems different from the named product.

Solution: Review scope rulings. When in doubt, request a formal scope ruling from Commerce.

5. Transshipment Risk

Importing Chinese steel through Vietnam doesn't make it Vietnamese. CBP actively investigates country-of-origin fraud.

Solution: Know your supply chain. Verify actual manufacturing location. Maintain evidence.

What Happens When You Get It Wrong

Potential Consequences

For more on CBP enforcement, see our guide on avoiding CBP penalties and audits.

Back duties - Full amount owed plus interest
Civil penalties - Up to 4x the unpaid duties for fraud
Criminal penalties - In cases of intentional evasion
Continuous bond increases - Higher bonding requirements
Increased scrutiny - More examinations and audits

Real Example: Solar Panel Evasion

In recent years, CBP has conducted multiple investigations into solar panel imports allegedly transshipped through Southeast Asian countries to evade Chinese AD/CVD duties. Companies faced:

Millions in back duties
Suspended entries
Criminal referrals
Business disruption

How Duty Simulator Helps with AD/CVD

Managing AD/CVD complexity is exactly what we built Duty Simulator to handle:

Automatic AD/CVD identification:

Enter your product and origin
We flag potential AD/CVD exposure
See current rates by manufacturer

Administrative review tracking:

Get alerts when reviews are initiated
Monitor preliminary and final results
Plan for rate changes

Risk assessment:

Identify high-risk product categories
Evaluate alternative sourcing
Model landed cost scenarios

Classification accuracy:

Proper HTS codes mean proper AD/CVD determination
Our AI catches common misclassifications
Avoid inadvertent scope inclusion

Staying Ahead of AD/CVD Changes

Monitor New Petitions

The ITC website publishes new petitions. If your products or source countries are named, you'll want to know early.

Watch Commerce Announcements

Administrative review schedules, preliminary results, and scope rulings all appear in the Federal Register. Set up alerts for your key products.

Review Annually

AD/CVD rates change. What was 15% last year might be 40% this year. Build annual rate reviews into your compliance calendar.

Related: AD/CVD duties often stack with Section 301 tariffs. Learn how to calculate total import duties including all applicable charges.

Key Takeaways

AD/CVD can dwarf regular duties - Rates of 50%, 100%, 200%+ are common
Deposits ≠ final liability - Administrative reviews adjust rates retroactively
Know your exposure - Check before importing, not after
Rates are manufacturer-specific - Your supplier's rate matters
Documentation is essential - Maintain evidence of origin and value
Stay current - Annual reviews mean rates change constantly

Next Steps

Check your current imports against the CBP AD/CVD database
Review supplier documentation for manufacturer identification and rates
Set up monitoring for administrative reviews affecting your products
Try Duty Simulator to automate AD/CVD identification and tracking

Need help managing AD/CVD complexity? Duty Simulator automatically flags affected products and tracks rate changes so you're never surprised by unexpected duties.