The fracción arancelaria is Mexico's tariff classification code, the equivalent of the U.S. HTS code, that determines the duties, permits, and regulations applying to a product. Every pedimento requires one, and misclassification is a top source of customs trouble.
The fracción arancelaria is the tariff classification a product receives under Mexico's tariff schedule (LIGIE), built on the same international Harmonized System as the U.S. HTS code. Mexico uses an eight-digit fracción plus a supplementary commercial identifier (NICO), and the classification determines everything downstream: duty rate, whether T-MEC preferences apply, which permits and NOMs attach, and how the product must be documented on the pedimento.
Classification is the agente aduanal's craft, done from the commercial invoice, technical specs, and often physical inspection during a previo.
Carriers and brokers do not classify goods, but classification failures land on the truck. A disputed fracción means the pedimento cannot be filed or must be corrected, and the trailer waits while that happens. Worse, a misclassification discovered during a red-light exam can escalate to penalties and a held load. The freight-side lesson is about information quality: vague commodity descriptions like 'auto parts' or 'FAK' make classification slow and defensive. Get real commodity detail from the shipper up front, pass it intact to the customs brokers on both sides, and your crossings get faster. When quoting a new commodity on a new lane, asking 'has your agente already classified this product' is a genuinely useful qualifying question; a yes means the lane has been run before.
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