How to Calculate Anti-Dumping Duty
What is Anti-Dumping Duty?
The Anti-Dumping Duty Calculator computes the additional AD/CVD (anti-dumping and countervailing duty) rates imposed on imports sold below fair market value or subsidized by foreign governments, on top of normal customs duties.
Formula
Total Duty = Normal Duty + AD Duty Rate (%) × Entered Value + CVD Rate (%) × Entered Value
- EV
- Entered Value ($) — Customs value of the goods subject to AD/CVD order
- AD
- Anti-Dumping Rate (%) — Dumping margin set by Commerce Department investigation
- CVD
- Countervailing Duty Rate (%) — Subsidy offset rate from Commerce Department investigation
- ND
- Normal Duty ($) — Standard MFN duty from HTS schedule
Step-by-Step Guide
- 1Check if your product and exporting country are subject to an active AD/CVD order
- 2Look up the specific AD rate for the manufacturer/exporter (or the all-others rate)
- 3Look up any applicable CVD rate for the country/product
- 4Add AD and CVD duties to the normal customs duty to get total duty obligation
Worked Examples
Input
Chinese steel pipe, $1M entered value, MFN 0%, AD rate 69.2%, CVD rate 15.28%
Result
Normal duty = $0, AD = $692,000, CVD = $152,800, Total = $844,800
Input
Vietnamese shrimp, $500K, MFN 0%, AD rate 25.76%, no CVD
Result
AD duty = $128,800, Total additional = $128,800
Common Mistakes to Avoid
- ✕Not checking whether your specific exporter has a unique rate vs the all-others rate
- ✕Forgetting that AD/CVD rates stack on top of normal duties and Section 301 tariffs
- ✕Missing the requirement to post cash deposits for estimated AD/CVD duties at entry
Frequently Asked Questions
How are anti-dumping rates determined?
The Commerce Department compares the export price to the normal value (home market price or constructed value) of the goods. The difference is the dumping margin, which becomes the AD duty rate.
Can AD/CVD rates change over time?
Yes, annual administrative reviews can raise or lower rates for specific exporters. Sunset reviews every five years determine whether the order continues. New shippers can request reviews to establish individual rates.
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