The Harmonized System (HS) is the global language for classifying traded goods. Nearly every customs authority uses it to assess duties and enforce rules. Getting the code wrong means wrong duty, delays, or penalties — so it is worth doing carefully.
How HS codes are structured
The HS is maintained by the World Customs Organization. The first six digits are internationally standardized: two digits for the chapter, two for the heading, two for the subheading. Countries then add their own digits (often making 8–10 in total) for tariffs and statistics.
A practical classification method
Work from the goods themselves, not from what you'd like the duty to be:
- Describe the product precisely: material, function, form and use
- Find the right chapter (broad category), then heading, then subheading
- Apply the General Rules of Interpretation for tricky or mixed goods
- Confirm the country-specific extension for your destination
- Keep your reasoning on record in case customs asks
When in doubt
For high-value or ambiguous items, seek a binding ruling from the destination's customs authority. A correct code up front is far cheaper than a reclassification, fine or seizure later.
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