Harmonized System (HS) Codes Explained: HS vs HTS vs Schedule B
The Harmonized System, usually called HS, is the international classification used to organize traded goods for customs tariffs and merchandise trade statistics. It provides a shared structure so countries can classify physical products consistently at the border and report trade data in a comparable way.
What HS is and what it is not
HS is the global classification backbone for physical goods in international trade. It is used for tariff administration and for trade statistics, but it is not an industry code for businesses and it is not a services classification.
That means HS answers the question, “What good is being traded?” It does not answer, “What industry is the company in?” or “What service was sold?”
HS is used to identify
- The traded good itself
- The applicable tariff line or customs category
- The correct reporting structure for merchandise trade
HS does not identify
- A company’s industry classification
- A cross-border service transaction
- A combined goods-and-services product framework
HS code anatomy
HS is hierarchical. The internationally standardized level is six digits. Those six digits are organized as chapter, heading, and subheading. Countries can then add their own national extensions for tariff or statistical detail.
Copper and articles thereof
Copper wire
Wire of copper-zinc base alloys (brass)
Country-specific tariff or statistical detail
In the United States, HS is the shared six-digit global base. The HTS is the U.S. import tariff and statistical schedule, and Schedule B is the U.S. export classification system used by the Census Bureau.
What HS is used for
HS supports several connected trade functions. At the most practical level, it helps importers, exporters, customs agencies, analysts, and trade researchers describe goods consistently.
- Customs tariffs and duty treatment
- Merchandise trade statistics
- Import and export reporting
- Rules of origin and trade policy analysis
- Compliance and controls for restricted goods
- Product-level trade and supply-chain research
For cross-country product trade analysis, the six-digit HS level is usually the most comparable starting point because national extensions vary by country.
How to classify a product correctly
Good HS classification depends on the product’s actual characteristics, not just the name used in marketing materials or on an invoice. Classification often turns on the material, form, function, and level of completion of the item.
Step 1: Define the product clearly
- Material or composition
- Principal function or use
- Manufacturing stage
- Physical specifications and packaging
Step 2: Work through the hierarchy
- Find the right chapter
- Narrow to the correct heading
- Choose the best six-digit subheading
- Apply national extensions where required
A common mistake is choosing a code based only on a familiar product name. Two products that sound similar can fall under different HS categories because of differences in material, use, or construction.
Revision cycle
The HS is revised over time so the classification can reflect changes in trade patterns, technology, and policy needs. For analysts and compliance teams, that means the edition year matters. When comparing data across time, it helps to record the HS vintage used in the dataset or filing.
Related standards
If you are working across product, industry, and international reporting systems, these related standards often need to be used together.
FAQ
- Is HS the same as HTS?
No. HS is the global six-digit goods classification. The HTS is the U.S. import tariff and statistical schedule built on that HS structure. - Is HS the same as Schedule B?
No. Schedule B is used for U.S. export classification and reporting through the Census Bureau. - How many digits is an HS code?
The internationally standardized HS level is six digits. Countries often add more digits for national use. - Why do I sometimes see different codes for similar products across countries?
The shared base is usually the first six digits, but country-specific extensions can differ. Product details can also change the proper classification. - Which level should I use for analytics?
For broad cross-country comparability, the six-digit HS level is often the cleanest baseline. For actual filings, tariff work, or country-specific compliance, use the national extension required by that country.