HS code
An HS code is a standardised 6-digit number that classifies a traded product worldwide; countries extend it into a fuller national commodity code (10 digits in the UK) that determines the duty rate and rules that apply.
Last reviewed 16 July 2026.
The Harmonized System (HS) code is an international product-classification standard maintained by the World Customs Organization. The first six digits are the same in every country that uses the system, grouping goods by chapter, heading and subheading — so a product has broadly the same HS code whether it is exported from China or imported into the UK.
Countries then extend the six-digit HS code with further digits for their own tariff and statistics. In the UK, imports are declared using a 10-digit commodity code that begins with the HS code. That commodity code is what actually determines your duty rate, import VAT treatment, and whether any licences, quotas or anti-dumping measures apply.
Getting the HS code right is the single most consequential classification decision an importer makes. The wrong code can mean the wrong duty rate, unexpected charges, delayed clearance or penalties for underpayment.
How it affects your landed cost
Your HS code is the starting point for the duty rate in your landed-cost calculation — resolved to the full 10-digit UK commodity code, it can set a duty anywhere from 0% to double digits, which flows straight through to your cost per unit. Our HS code lookup and calculator use the code to pull the applicable UK duty rate so your landed cost reflects the tariff that actually applies to your goods.
Calculate your landed costHS code — FAQ
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