Customs clearance is not difficult. It is just unforgiving: one inconsistent number between two documents can hold your container at the port while storage charges accumulate.
This is the checklist we work through on every US-bound shipment.
US import rules, duty rates and filing requirements change, and they vary by product. Always confirm current requirements with your customs broker or US Customs and Border Protection before shipping. This article is a working checklist, not legal advice.
The three deadlines that matter
| Deadline | What is due | Consequence of missing it |
|---|---|---|
| 72 hours before vessel loading | ISF filing (Importer Security Filing) | Fines and possible cargo holds |
| On arrival / within 15 days | Entry filed and duty paid | Demurrage; after 15 days, goods go to general order |
| Within 10 days of release | Entry summary (CBP Form 7501) and duty deposit | Penalties and delayed release of future shipments |
Most first-time importer problems come from the first one. ISF is filed before the cargo is even loaded, not on arrival.
The core document set
1. Bill of lading (B/L)
The carrier's contract and the document of title. Your customs broker cannot file without it. For ocean freight it is usually a telex release or an original set; confirm which, because an original B/L that has to travel by courier adds days.
Check: consignee name and address must match your customs bond and your IRS/EIN records exactly.
2. Commercial invoice
What you bought, from whom, for how much. It drives the duty calculation, so accuracy matters more here than anywhere else.
Must include: seller and buyer names and addresses, detailed goods description, quantity, unit price, total value, currency, country of origin, and the terms of sale (Incoterms).
Common failure: "parts" or "samples" as a description. Customs needs a real description of what the item is and what it is made of.
3. Packing list
Itemises what is in each carton, and lets customs match the shipment against the invoice. It should reconcile to the invoice line by line and to the container manifest.
Common failure: invoice and packing list disagreeing on quantity. This is the single most frequent cause of an examination.
4. Certificate of origin
Not always required, but often needed — either for preferential duty treatment under a trade agreement or because the product category requires it. If you are claiming a preferential rate, you need the correct certificate, not just a statement on the invoice.
5. Customs bond
Required to import commercially. Two types:
- Single entry bond — one shipment only. Fine for a one-off.
- Continuous bond — covers all your shipments for a year. Cheaper per shipment once you import regularly, and required for many entry types.
6. Importer of record details
To import in your own name you generally need a US entity or a designated importer, an EIN, and the bond. If you use a DDP service, the forwarder imports in their name — convenient, but see Incoterms 2020 explained for why that has trade-offs.
7. Product-specific certificates
Depending on what you are importing:
| Product type | Additional requirement |
|---|---|
| Food and beverages | FDA prior notice and facility registration |
| Electronics | FCC declaration |
| Toys and children's products | CPSC compliance and testing |
| Cosmetics and drugs | FDA registration |
| Alcohol, tobacco, firearms | Permits from ATF |
| Textiles | Country of origin labelling |
| Wood packaging | ISPM 15 heat treatment stamp |
If your product falls into one of these categories and you have not arranged the certificate, the shipment will be held regardless of how good your other paperwork is.
8. Arrival notice
Issued by the carrier or your forwarder when the vessel arrives. This is what tells you the free time clock has started. See demurrage and detention for what happens if you are slow to act on it.
The HS code problem
Your goods need a Harmonized Tariff Schedule code, and the code determines the duty rate. Three things to know:
- The code is your legal responsibility, not your supplier's and not your forwarder's. They can advise; you declare.
- Suppliers routinely quote the wrong code. Sometimes out of carelessness, sometimes because a different code has a lower duty rate. Either way, misclassification can mean penalties and back duty.
- Get a binding ruling for anything unusual or high value. It costs nothing but time and removes the ambiguity permanently.
A practical pre-shipment checklist
Before the vessel loads:
- [ ] Bill of lading consignee matches bond and EIN
- [ ] Commercial invoice is detailed and accurate
- [ ] Packing list reconciles to the invoice
- [ ] HS code confirmed for each product
- [ ] Customs bond in place (single or continuous)
- [ ] Broker instructed and entry prepared
- [ ] ISF filed 72 hours before loading
- [ ] Product-specific certificates obtained
- [ ] Duty funds available for same-day payment
- [ ] Drayage booked for arrival
- [ ] Empty container return scheduled
Frequently asked questions
What is the ISF and when is it due? The Importer Security Filing must be submitted to CBP at least 24 hours before the cargo is loaded onto the vessel, and in practice you should aim for 72 hours. It covers ten data elements about the shipment, the parties and the goods.
Do I need a customs bond to import from China? Yes, for any commercial shipment. A single entry bond covers one shipment; a continuous bond covers a year of shipments and is better value once you import regularly.
Who is the importer of record? The party legally responsible for the entry, the duty and the accuracy of the declaration. It is normally the buyer of the goods — but under DDP terms it is often the seller's agent instead.
Can my supplier handle customs for me? They can arrange it through their forwarder, and many do on DDP terms. But you lose visibility of the duty calculation and you are not the importer of record.
How long does customs clearance take? For a clean entry, release is often same-day or within 24 hours of arrival. An examination adds one to seven days. Most delays come from documentation, not from customs itself.
What happens if my goods are held? You will be notified of the reason. It is almost always a missing or inconsistent document, an unpaid duty, or a certificate. Act immediately — storage charges start on day one of free time.
Get the paperwork right the first time
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