HS code basics
How the Harmonized System is built, how codes are read and how a product finds its heading and subheading.
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General Rules of Interpretation: GRI 1 to 6 Explained
The General Rules of Interpretation decide every HS and HTS code. See what GRI 1 to 6 say, the order to apply them, and real CBP rulings that use them.
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HS Code Chapters List: 21 Sections and 97 Chapters
HS code chapters list: all 21 sections with their chapter ranges, the US-only chapters 98 and 99, and the chapters importers and online sellers use most.
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HS vs HTS vs Schedule B: Which Code Goes Where
HS vs HTS vs Schedule B: who maintains each code, how many digits it has, and which one belongs on a US import entry or on an export filing.
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What Is an HS Code? Structure, Digits and Examples
What is an HS code? Learn how the six digits are built, how countries extend them to 8 or 10 digits, and how to read a real code line by line.