Containers arriving at American ports are released within hours despite crossing an international border. The speed comes from paperwork filed while the vessel was still at sea, prepared by a licensed intermediary.
The importer of record carries the liability
Customs law places responsibility on the importer of record, who must declare goods accurately and pay what is owed. Penalties for inaccuracy fall on that party rather than on the seller abroad.
Most importers lack the specialist knowledge this requires, so they engage a customs broker licensed by the federal government to file on their behalf under a power of attorney.
The broker's license is personal and revocable, which gives the profession an incentive toward accuracy that a general freight forwarder does not necessarily share.
Classification decides the duty rate
Every imported item is assigned a code from a lengthy tariff schedule, and the code determines the rate of duty owed. Similar-looking products can sit in different categories with very different rates.
Disputes over classification are common and consequential, because a single digit can change what a shipment costs. Importers may request advance rulings to settle the question before goods move.
Valuation is a parallel question, since duty is usually charged on the transaction value with specified additions. Related-party sales receive particular scrutiny for this reason.
Filing happens before arrival
Manifest data must be transmitted well before a vessel loads at the foreign port, giving authorities time to assess risk on each container before it sails.
Entry documents are then filed electronically, and the automated system returns a decision. Most shipments are released on paperwork alone without physical examination.
Shipments selected for inspection are moved to an examination station, and the delay and cost of that fall on the importer regardless of what is found.
Other agencies attach their own requirements
Customs enforces rules on behalf of many federal agencies, covering food safety, drug approval, wildlife, agriculture, communications equipment and consumer product standards.
A shipment can clear customs and still be held awaiting another agency's review, which is a frequent surprise for importers new to a regulated category.
Brokers maintain the filings each agency expects, and the number of these has grown as agencies moved their processes into the same electronic window.
Bonds guarantee payment
Importers post a bond, purchased through a surety, guaranteeing that duties and penalties will be paid. Amounts are set relative to duty volume over a period.
When duty rates rise, required bond amounts rise with them, sometimes forcing importers to obtain additional coverage on short notice.
Duties themselves are not always final at entry, since liquidation occurs later and can adjust the amount owed after review.