Many California businesses import without ever thinking of themselves as "importers" — they just buy product overseas and a freight forwarder makes it appear. But U.S. customs law puts the legal responsibility on the importer of record, not the broker, and the duties are real: correct classification, correct valuation, correct origin, on pain of back duties and penalties years later. Here is the framework every importing business should know.
The importer of record and the reasonable care standard
Every formal entry into the United States has an importer of record — usually the buyer — who is legally responsible for the accuracy of the entry. Since the Customs Modernization Act, the law places on the importer a duty of reasonable care in classifying goods, declaring value, and providing the information U.S. Customs and Border Protection needs (19 U.S.C. § 1484). Hiring a licensed customs broker helps discharge that duty but does not transfer it: if the broker files what you told it, and what you told it was wrong, the exposure is yours. Reasonable care in practice means having a basis for your classifications and valuations — a ruling, a professional opinion, or documented internal analysis — rather than copying whatever the supplier's invoice says.
Classification: the HTSUS number drives the duty bill
Every product entered must be classified under a ten-digit code in the Harmonized Tariff Schedule of the United States. The code determines the base duty rate, whether trade-remedy tariffs apply, and eligibility for preference programs. Classification is genuinely technical — small distinctions in material, function, or assembly can move a product between headings with very different rates — and it is the importer's call, not the broker's or the supplier's. For a product you will import repeatedly, a binding ruling from CBP settles the question prospectively and is strong evidence of reasonable care.
Valuation and country of origin
Duties are generally assessed on transaction value — the price actually paid or payable, with statutory additions that importers routinely miss: assists (tooling, molds, or materials you supplied to the factory free or at reduced cost), certain royalties, packing costs, and proceeds of resale that flow back to the seller. Related-party pricing gets extra scrutiny. Country of origin matters twice over: nearly every imported article must be marked with its origin (19 U.S.C. § 1304), and origin determines whether Section 301 or other trade-remedy tariffs apply. "Origin" is a legal determination — often based on where the goods were last substantially transformed, but subject to product-specific rules — not a question of where they were shipped from, and routing goods through a third country to relabel them is a serious violation, not a strategy.
Bonds, entry mechanics, and partner agencies
Formal entries require a customs bond — typically a continuous bond for regular importers — which secures payment of duties and compliance. Entry summaries are filed, duties deposited, and the entry then "liquidates," usually within about a year, finalizing the duty amount. Remember that CBP is also the doorman for other agencies: FDA for food, cosmetics, and devices; USDA for agricultural goods; FCC for radiofrequency devices; CPSC for consumer products. Goods can clear customs and still be refused admission, detained, or recalled by a partner agency, so regulatory review belongs in product sourcing, not just at the border. Imports with supply-chain ties to Xinjiang or an entity on the UFLPA Entity List face a rebuttable presumption of exclusion under the Uyghur Forced Labor Prevention Act, which effectively requires supply-chain tracing for affected goods.
What happens when it goes wrong
Errors surface through CBP audits, targeted reviews, or a competitor's tip, and the lookback is long. Under 19 U.S.C. § 1592, penalties scale with culpability — negligence, gross negligence, or fraud — on top of the unpaid duties, and CBP can generally recover duties on entries going back five years. The safety valve is prior disclosure: an importer that comes forward before CBP begins an investigation caps its penalty exposure dramatically, usually at interest on the lost duties for negligence-level conduct. If an internal review turns up systematic misclassification or undervaluation, the disclosure decision is time-sensitive and worth making with counsel — the same calculus that applies to regulatory compliance issues generally.
Building an import compliance baseline
- Know your importer-of-record status on every lane, including DDP purchases where the seller claims that role.
- Maintain a classification database with the reasoning for each HTSUS code.
- Review valuation annually for assists, royalties, and related-party pricing.
- Keep entry records five years — it is required, and it is your defense file.
- Put compliance terms in supplier contracts: accurate documentation, origin certifications, and cooperation duties, drafted alongside your other international business terms.
Talk to a California business attorney
Whether you are setting up your first import lane or cleaning up classifications after years of growth, an early review is far cheaper than a penalty case. Schedule a free consultation or call (949) 418-2113.
This article is attorney advertising and provides general information only. It is not legal advice and does not create an attorney–client relationship. Facts matter; consult a lawyer about your specific situation.
