Customs and Duties: Preparing Your Cargo Data First

Most customs delays we see do not start with a tariff question. They start with a data question: what exactly is in the box, how is it classified, and does the paperwork agree with the carton. Get that right first and most of the rest becomes routine. If you need help assembling the file, our sourcing services can coordinate it with the supplier.

What to prepare before the shipment leaves

Suppose you consolidate a pet-apparel order: 1,200 cartons of knit pet sweaters, denim pet jackets and plaid pet bandanas, each carton 0.06 CBM, giving 72 CBM total. At roughly 9 kg per carton the gross weight is about 10,800 kg, so the shipment is a little over 150 kg per CBM — dense enough that it will not cube out early. Your broker needs, per line: a clear product description in plain English, a suggested HS heading, fibre composition (for example, knit polyester versus cotton denim), construction (woven or knitted), and whether items are sets or separates. Two-leg wear packed with a matching jacket can change classification, so describe each style as it is actually sold.

Prepare the documents as one consistent set: commercial invoice, packing list, and any test reports or declarations the destination requires. The invoice value should reflect the transaction, not a round number invented for convenience; undervaluation is a common cause of holds and penalties. For pet products, flag anything that could trigger extra review — batteries in a light-up collar, liquids in a grooming spray, magnets in a closure, or licensed character prints on a pet hoodie. These are not necessarily problems, but they are questions, and it is cheaper to answer them before departure than after arrival.

Where buyers usually lose time

The recurring gaps are simple: the invoice says \”pet clothes\” while the packing list lists six styles; the carton count on paper does not match the pallet; the certificate of origin is missing because nobody asked. Duty rates, thresholds and de minimis rules vary by country and product and change over time, so treat any number you hear as something to verify with your own broker rather than a fixed fact. What you control is the accuracy of the file.

Clean, consistent cargo data is the cheapest customs preparation there is. Start with the cartons, not the calculator.