How US customs clearance works for a small China shipment
Customs & rules · Updated
Now that small parcels from China are dutiable, every shipment passes through formal US customs clearance. The process is routine once you know the pieces.
Here is what customs actually needs and where small shipments tend to get stuck.
Key takeaways
- --Formal US customs clearance is now required for all small China imports since the de-minimis exemption ended.
- --A commercial invoice, packing list, and bill of lading or air waybill are required for every clearance.
- --The HS code classifies your product for customs and determines the duty rate; an incorrect code causes holds.
- --A licensed customs broker files the entry with CBP on your behalf and arranges duty payment.
- --Most customs holds are paperwork problems: vague invoices, wrong HS codes, or mismatched counts.
- --Clean, consistent documents across invoice, packing list, and transport document prevent most delays.
The documents customs needs
Clearance runs on paperwork. For a typical small import you need a commercial invoice, a packing list, and the bill of lading or air waybill from the carrier.
- Commercial invoice: who sold what to whom, the value, and the terms.
- Packing list: what is physically in the shipment, with weights and counts.
- HS code: the classification that sets your duty rate.
The HS code sets your duty
The Harmonized System code classifies your product for customs. It determines the duty rate, so an incorrect code means you either overpay or get flagged for misclassification. Confirm the code before you ship, not after the goods land.
The broker and the entry
A licensed customs broker files the entry with US Customs and Border Protection on your behalf and arranges duty payment. For repeat importers a customs bond is also required. A forwarder that includes brokerage means you do not have to source and manage this separately.
Why shipments get held
- Vague or undervalued commercial invoices that do not match the goods.
- Wrong or missing HS code.
- Restricted or regulated goods that need extra agency approval.
- Mismatched weights and counts between the invoice and the packing list.
Most holds are paperwork problems, not the goods themselves. Clean, consistent documents are the single best way to avoid delay.
What can cause a small shipment to be held or delayed
The most common reason small shipments are held is a paperwork mismatch. If the commercial invoice value is vague or inconsistent with the declared goods, if the packing list counts do not match the invoice, or if the bill of lading describes goods differently than the commercial invoice, customs will query the shipment. Consistent, specific documents across all three forms -- invoice, packing list, and transport document -- prevent most holds.
Certain product categories require approval from agencies beyond CBP before they can enter the US. These include food, cosmetics, medical devices, some electronics, children's products under CPSC rules, and products with battery or chemical components. If your goods fall into a regulated category, the additional agency review adds days or weeks to clearance. Confirming your product's regulatory status before shipping gives you time to prepare the right documentation.
CBP selects a percentage of shipments for physical examination regardless of documentation quality. An exam hold typically adds 5 to 10 days and cannot be predicted or prevented. Clean paperwork reduces the probability of being flagged but does not eliminate the risk. Build buffer time into any shipment with a hard delivery deadline.
FAQ
Do I need a customs broker for a small shipment?
For a formal entry, yes. A licensed customs broker files your entry with CBP and handles duty payment. Plain Freight includes brokerage in its all-in quote, so you do not have to find and manage one separately.
What is an HS code and why does it matter?
The HS (Harmonized System) code classifies your product for customs and sets the duty rate. An incorrect code can mean overpaying duty or getting flagged for misclassification, which delays the shipment.
Why would my shipment get held at customs?
The most common causes are documentation problems: a vague or undervalued commercial invoice, a wrong or missing HS code, or weights and counts that do not match the packing list. Restricted goods can also need extra approval.
What is a customs bond and do I need one?
A customs bond is a financial guarantee that the importer will pay any duties, taxes, and fees owed to CBP. For formal entry shipments, a bond is required. There are two types: a single-entry bond that covers one shipment, and a continuous bond that covers all shipments over a year. If you import regularly, a continuous bond is typically more cost-effective. Your licensed customs broker arranges the bond on your behalf. When brokerage is included in your freight quote, the bond is part of the service.
How long does US customs clearance take for a small China shipment?
For a straightforward shipment with clean documentation, customs clearance typically takes one to three business days after the goods arrive at the US port or airport. If CBP selects the shipment for physical examination, clearance can take five to ten additional business days. Shipments with incomplete documentation, restricted products, or agency review requirements can take longer. Preparing accurate paperwork before departure is the most reliable way to keep clearance times predictable.
What is an ISF and when do I need to file one?
ISF stands for Importer Security Filing, sometimes called 10 plus 2. It is a CBP requirement for ocean freight shipments entering the US. The ISF must be filed at least 24 hours before the cargo is loaded on the vessel in China. It contains information about the shipper, consignee, HS code, and country of origin. Late or missing ISF filings can result in penalties. Your freight forwarder or customs broker handles ISF filing as part of the ocean freight process.
Shipping a small load from China?
Get one all-in quote: freight, customs, and delivery handled.
Contact us on WeChat
Scan the QR code in WeChat and send your product, weight, dimensions, China origin, US destination ZIP, and urgency. Email still works: hello@plainfreight.com.