Binding Ruling

A binding ruling is an official written determination from US Customs and Border Protection that tells an importer, in advance and with legal force, how CBP will treat a specific product — most often its HTS classification, but also its valuation, country of origin, or marking. You request one through CBP's eRulings (eCBP) program before importing, and CBP is bound to honor it at every US port for substantially identical merchandise until the ruling is formally modified or revoked. For example, an importer unsure whether a composite garment classifies at a 3% or a 32% duty rate can file for a binding ruling and lock in the answer rather than gamble on a broker's guess and risk penalties. It matters because classification drives every tariff layer that stacks on top — Section 232, Section 301, and the reciprocal base — so a binding ruling removes uncertainty, protects against back-duty and penalty claims, and creates a defensible record if CBP later disputes an entry.