US Customs Clearance Process for Importers
Updated 2026-08-17
US customs clearance requires: (1) CBP bond (continuous or single-entry), (2) customs entry via ACE system, (3) commercial invoice, packing list, and Bill of Lading, (4) ISF (10+2) filing for ocean shipments 24 hours before loading, (5) duty payment. Most importers use a licensed customs broker.
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Primary sources
This page is grounded in the primary materials below. Rules change, so open the source and confirm the current version before acting.
FAQ
Do I need a customs broker?+
Not legally required, but strongly recommended. A licensed customs broker handles documentation, tariff classification, duty calculation, and communication with CBP. For FBA shipments, a broker familiar with Amazon logistics is essential.
What is ISF (10+2)?+
Importer Security Filing requires importers (or their brokers) to submit 10 data elements about ocean cargo to CBP at least 24 hours before loading onto a vessel at the foreign port. Failure to file results in $5,000 penalties per violation.
How do I get a CBP bond?+
A customs bond guarantees payment of duties to CBP. Continuous bonds (recommended for regular importers) cover all transactions for one year. Single-entry bonds cover one shipment. Bonds are obtained through a licensed surety company, typically via your customs broker.
What is the difference between a continuous bond and a single-entry bond?+
A continuous bond (annual, ~USD 500-600/year) covers all imports for 12 months and is cost-effective if you import regularly. A single-entry bond (per shipment, typically 0.5-1% of the goods value) is cheaper for one-time imports but more expensive over time. For Amazon FBA sellers who ship inventory regularly, a continuous bond is almost always the better choice. The bond amount is based on your estimated annual duties — minimum USD 50,000 for continuous bonds.
How long does customs clearance typically take for FBA shipments?+
Standard ocean freight FBA shipments typically clear customs within 1-3 business days after arrival at the US port, assuming all documentation is complete and no exams are triggered. Air freight may clear in 1-2 days. If CBP selects your shipment for examination (X-ray or physical), add 3-7 business days. Common reasons for delays: incorrect ISF filing, missing FDA/CPSC documentation, Section 301 tariff classification issues, or random compliance checks. Using an experienced customs broker significantly reduces clearance time.
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