GlossaryEN1 min readUpdated: Jun 18, 2026
HS Classification Opinion
An HS Classification Opinion is an official ruling by a customs authority on the correct tariff heading for a specific product under the Harmonized System (HS).
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Source: https://ec.europa.eu/taxation_customs/business/customs-procedures-import-and-export/customs-procedures/binding-tariff-information_en
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Definition & Explanation
An HS Classification Opinion is an official ruling by a customs authority on the correct tariff heading for a specific product under the Harmonized System (HS). Importers, exporters, and customs brokers seek these rulings when the classification of a product is ambiguous or disputed. The most formally significant variant is the Binding Tariff Information (BTI): once issued, it legally commits the customs authority to apply that classification to future clearances of the same product, giving traders certainty over applicable duty rates. Non-binding opinions carry only advisory weight and create no legal obligation. For high-value goods or products with complex compositions, obtaining a binding ruling is standard practice to avoid post-clearance adjustments or penalties.
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