Field notes
HS code drift: catching quiet shifts before they distort your pack
HS code drift rarely arrives as a dramatic reclassification. More often a supplier updates a product description, a broker selects a neighbouring heading, and your corridor chart slowly tilts.
Compare this month’s top ten headings against the same lanes three months earlier. If volume stayed flat while the heading mix moved, investigate before you redraw management charts.
Ask brokers for the rationale string when a heading changes for a recurring SKU. Without that note, your report will treat a paperwork choice as a market shift.
We recommend a quarterly heading freeze for stable SKUs, with a short exception log. That habit keeps customs analytics comparable across seasons without freezing genuine product change.