A practical guide to understanding the Harmonized Tariff Schedule code structure, finding the right classification for your products, and determining applicable duty rates.
Every HTS code follows a hierarchical structure from broad to specific. Chapters (2 digits) group products by material or industry. Headings (4 digits) narrow to product type. Subheadings (6 digits) are internationally standardized under the World Customs Organization's Harmonized System. The U.S. adds digits 7-8 for tariff rate lines and 9-10 for statistical purposes. The duty rate is determined at the 8-digit level.
When a product could be classified under multiple headings, the General Rules of Interpretation (GRI) determine the correct classification. GRI 1 says classification is determined by the terms of the headings and section/chapter notes. GRI 3 handles goods classifiable under two or more headings by using the most specific description, essential character, or the heading that occurs last numerically.
Know your product inside out—material composition by weight percentage, primary function, intended use, and construction method all affect classification. Search the USITC HTS database at hts.usitc.gov for keyword matches. Review CBP Customs Rulings Online Search System (CROSS) for prior rulings on similar products. When in doubt, file a binding ruling request with CBP for a legally binding classification determination.
An HTS (Harmonized Tariff Schedule) code is a numerical classification that identifies a specific product for customs purposes. In the U.S., HTS codes are 10 digits long and determine the duty rate applied to imported goods. The first 6 digits are internationally standardized; digits 7-10 are U.S.-specific.
U.S. HTS codes are 10 digits long, structured as XXXX.XX.XX.XX. The first 2 digits identify the chapter (product category), digits 3-4 identify the heading, digits 5-6 the subheading, digits 7-8 the U.S. tariff rate line, and digits 9-10 provide additional statistical detail.
Start by identifying the product's material, function, and intended use. Search the USITC HTS database by keyword, or navigate the schedule by chapter. If your product could fit multiple codes, apply the General Rules of Interpretation (GRI) to determine the most specific classification. For complex products, request a binding ruling from CBP.
Using an incorrect HTS code can result in overpaying or underpaying duties. Underpayment leads to back-duty assessments, interest charges, and potential penalties during CBP audits. Overpayment means you are voluntarily paying more than required. Both cases warrant correction through a Post Summary Correction filing.
Yes. Small differences in material composition, function, or construction can result in different classifications with significantly different duty rates. For example, a cotton t-shirt and a polyester t-shirt may fall under different subheadings with rates varying by several percentage points.
MarginHub uses AI to classify your products against the Harmonized Tariff Schedule and alerts you to lower-rate alternatives.
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