How to Read an HS Code: A Breakdown of Its Structure

HS codes are not random numbers used in trade documents. They follow a structured system that classifies goods consistently across international borders. Many traders simply reuse old codes or rely on forwarders, which often leads to mistakes. Knowing how the structure works helps reduce delays, improves accuracy, and supports correct duty and compliance decisions.

Start at Chapter Level

The first two digits show the chapter. This is the widest level in the Harmonised System. For instance, machinery is covered under Chapter 84, while clothing falls under Chapter 61. It establishes the main category before any detailed classification is applied.

Move to the Heading

The next two digits make up the heading. This further divides the chapter into more specific product groups. For example, it separates general machinery into items like pumps or engines, and garments into knitted or woven categories. You can explore a detailed breakdown on How to Read an HS Code.

Sub-heading: The Global Standard

The fifth and sixth digits form the sub-heading. This level is standard worldwide, meaning all customs authorities interpret these digits in the same way, ensuring consistency in product classification.

Beyond Six Digits

After six digits, countries add extra codes for duties, restrictions, and local regulations. These vary by region but are built on the same global structure.

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