US Customs Clearance Process for China Imports: Step-by-Step

Every shipment from China entering the United States must clear US Customs and Border Protection (CBP). Understanding the customs clearance process helps you plan lead times, avoid holds, and choose the right shipping terms — or let GSC handle it all through DDP shipping.

Step 1: Pre-Shipment — ISF Filing (Ocean Only)

For ocean freight, the Importer Security Filing (ISF, or "10+2") must be submitted to CBP at least 24 hours before cargo loads onto the vessel in China. ISF includes buyer and seller information, manufacturer, HTS codes, and container stuffing location.

GSC files ISF on your behalf as part of our DDP service. Missing or late ISF filings result in penalties up to $5,000 per violation — another reason importers prefer working with an experienced freight forwarder.

Step 2: Cargo Arrival and Customs Entry

When your container or air shipment arrives at a US port (Los Angeles, Long Beach, New York/Newark, etc.), the licensed US customs broker we work with submits a formal entry to CBP. This includes the commercial invoice, packing list, bill of lading, and product classification under the correct HTS code.

CBP calculates duties based on your product's classification and country of origin. China-origin goods may face standard MFN rates plus Section 301 tariffs on many categories — see our duties and tariffs guide for current rates.

Step 3: Customs Examination (If Selected)

CBP selects a percentage of shipments for physical examination — tailgate exam, intensive exam, or X-ray. Exams add 3–14 days to clearance time. Accurate documentation and consistent shipping history reduce exam frequency.

GSC pre-screens cargo at our Guangzhou warehouse with optional inspection services to minimize surprises at US customs. Learn typical timelines in our customs clearance time guide.

Step 4: Duty Payment and Release

Once CBP accepts the entry and any exam is complete, duties and fees are paid. Under DDP terms, GSC pays these costs and includes them in your original quote. Cargo is then released for pickup or final-mile delivery to your address, FBA warehouse, or 3PL.

Required Documents for US Customs

• Commercial invoice with product value and description
• Packing list with weights and dimensions
• Bill of lading or air waybill
• ISF filing confirmation (ocean)
• Certificates for regulated products (FDA, FCC, CPSC as applicable)

Full checklist: import documents required for the USA.

FAQ: Customs Clearance Questions

• Do I need to be present for clearance? — No. GSC and our US broker handle everything remotely.
• Can I clear customs myself? — Yes, but you need a customs bond, broker license or hire a broker, and familiarity with CBP systems.
• What if customs holds my shipment? — GSC resolves holds by providing additional documentation or corrected classifications.