U.S. Import Compliance Laws: A Practical Guide

U.S. import compliance is the set of legal duties that attach to your goods the moment they cross the border: classifying them correctly, declaring an honest value, marking their country of origin, paying the right duties, and keeping the records to prove all of it. The law puts those duties on the importer of record — the party in whose name the goods enter — and it does not transfer to your freight forwarder, your customs broker, or your overseas supplier. Navigating import compliance means building a repeatable process around five core obligations and a single legal standard: reasonable care.

The legal standard: reasonable care

The foundation of U.S. import law is “reasonable care.” Under the Customs Modernization Act of 1993, U.S. Customs and Border Protection (CBP) and the importer share responsibility: CBP must clearly inform the trade community of its requirements (“informed compliance”), and the importer must use reasonable care to enter, classify, and value its goods and to provide any other information CBP needs to assess duties and enforce the law (19 U.S.C. § 1484).

Reasonable care is not a one-time act. It means having documented procedures, asking the right questions of suppliers, seeking expert advice when a classification or valuation is genuinely uncertain, and correcting mistakes when you find them. An importer who can show a careful, well-documented process is in a far stronger position than one who simply trusted a broker and looked away.

Classification: the Harmonized Tariff Schedule

Every imported product must be classified under the Harmonized Tariff Schedule of the United States (HTSUS), a 10-digit code that determines the duty rate and flags any special requirements. The first six digits come from the international Harmonized System administered by the World Customs Organization; the United States adds four more digits for over 17,000 distinct codes. The U.S. International Trade Commission publishes the HTSUS, but CBP is the only agency authorized to interpret it and issue binding classification rulings.

Classification follows the six General Rules of Interpretation, applied in