What is an HS Code & Why Does It Matter for International Shipping?

HS codes (Harmonized System codes) determine duty rates, trigger customs inspections, and directly affect transit time. Using the wrong HS code can result in delays, unexpected duties, or shipment rejection. Here's everything you need to know to classify your shipment correctly.

What Is an HS Code?

The Harmonized System (HS) is an internationally standardized system of names and numbers used to classify traded goods. Every product shipped internationally is assigned an HS code — a 6-digit number (extended to 8–10 digits in many countries) that determines which duty rate applies and whether the item requires special permits.

Why HS Codes Matter

Customs authorities use HS codes to calculate import duty
Incorrect codes can trigger audits, delays, and penalties
Some codes flag products for additional inspection or require import permits
USMCA duty-free treatment requires correct HS classification