# Customs Tariff Number Assignment

*Last updated: 2026-06-22*

> Unlike a simple HS code lookup, customs tariff number assignment is a legally binding classification decision: the importer, freight forwarder, or customs broker analyses a product's composition, materials, function, and intended use, then determines the correct eight- or ten-digit tariff code under the WCO General Rules for the Interpretation of the Harmonized System and the applicable national tariff schedule.

Unlike a simple HS code lookup, customs tariff number assignment is a legally binding classification decision: the importer, freight forwarder, or customs broker analyses a product's composition, materials, function, and intended use, then determines the correct eight- or ten-digit tariff code under the WCO General Rules for the Interpretation of the Harmonized System and the applicable national tariff schedule. The assigned code governs the duty rate, licensing requirements, and any import restrictions — making it directly cost-relevant. Incorrect classifications trigger duty recalculations and penalties; deliberate misdeclaration can result in criminal proceedings. For complex or novel goods, practitioners often apply for a Binding Tariff Information (BTI) ruling from the competent customs authority before shipment. Legal responsibility rests with the declarant, and a thorough product analysis is a prerequisite, not an optional step.

**Source:** [https://www.wcoomd.org/en/topics/nomenclature/overview/what-is-the-harmonized-system.aspx](https://www.wcoomd.org/en/topics/nomenclature/overview/what-is-the-harmonized-system.aspx)

## Quick Facts

| Property | Value |
|---|---|
| Term | Customs Tariff Number Assignment |
| Language | EN |
| Word count | 131 |
| Last updated | 2026-06-22 |
| Source | https://www.wcoomd.org/en/topics/nomenclature/overview/what-is-the-harmonized-system.aspx |

---

*Logistics Glossary — Freight Academy: [https://www.freight-academy.com/en/glossary/customs-tariff-number-assignment](https://www.freight-academy.com/en/glossary/customs-tariff-number-assignment)*

*Markdown mirror: [https://www.freight-academy.com/api/md/glossary/en/customs-tariff-number-assignment](https://www.freight-academy.com/api/md/glossary/en/customs-tariff-number-assignment)*

*JSON summary: [https://www.freight-academy.com/api/v1/glossary/customs-tariff-number-assignment/llm-summary?lang=en](https://www.freight-academy.com/api/v1/glossary/customs-tariff-number-assignment/llm-summary?lang=en)*