An HS code is a commodity classification number under the World Customs Organization’s Harmonized System. The first six digits are internationally standardised by chapter, heading, and subheading; countries extend them to eight or ten digits for tariffs and statistics. The code drives duty rates, controls, and filings.
Classification is consequential: the code determines duty and tax rates, preferential-origin eligibility, licensing and control requirements, and how the shipment is risk-screened. The same product can plausibly sit under neighbouring codes with different duty outcomes, which is why classification is a discipline with rulings and precedents rather than a lookup.
HS codes appear across the chain: on the commercial invoice in practice, in security filings, and in the customs entry. Misclassification risks underpaid duty, penalties, and retroactive assessments.
The HS code never appears in a container’s physical events, but it shapes the journey’s friction: codes flagged for controls attract holds and exams, which tracking then shows as post-discharge dwell. When one product line consistently dwells longer than the rest of your imports in TrackingMCP, classification and its paperwork are among the first places to look.
Customs procedures and filing requirements vary by country and change over time. This page is general orientation, not customs or legal advice. Confirm current rules with your customs broker or the relevant authority.
An HS code is a commodity classification number under the World Customs Organization’s Harmonized System. The first six digits are internationally standardised by chapter, heading, and subheading; countries extend them to eight or ten digits for tariffs and statistics. The code drives duty rates, controls, and filings.
The first six digits are harmonised internationally; national extensions beyond them differ. An eight- or ten-digit code from one country cannot be assumed valid in another.
The importer (and exporter for export controls), even when a broker advises. Binding ruling programmes exist in many customs regimes for certainty on contentious items.
Track dwell by shipment →
Port dwell context →
More in Customs & compliance: Customs clearance · Customs hold · Customs examination · Importer Security Filing (ISF) · AMS (Automated Manifest System) · ENS (Entry Summary Declaration) · Bonded warehouse · Dangerous goods (IMO classes) · Browse all 106 terms →