To most shippers, customs is a black box: the tracking shows "held at customs," and then — eventually — "released." Knowing what happens inside that box makes delays easier to prevent and faster to resolve.
The stages of clearance
- Pre-arrival data. Increasingly, customs authorities receive electronic data about a shipment before it arrives — sometimes before it departs. That data feeds the risk checks that follow.
- Declaration. The importer, or a customs broker on their behalf, lodges an import declaration describing the goods, their HS codes, value, origin, and the importer's details.
- Risk assessment. Customs systems score the declaration against risk profiles. Most shipments are released on documents alone; a minority are selected for a documentary check or a physical inspection.
- Inspection, if selected. Officers may check the documents, scan the goods, or open the packages to confirm they match the declaration.
- Duty and tax assessment. Import duty, VAT or sales tax, and any excise are calculated and must be paid or secured.
- Release. Once everything is satisfied, the goods are released for delivery.
How duties and taxes are worked out
Import charges generally depend on three things: the classification of the goods (their HS code, which sets the duty rate), their customs value, and their origin, which can qualify them for a reduced rate under a trade agreement.
Countries also differ on what the customs value includes. Some calculate duty on the value of the goods plus freight and insurance to the border; others use the value at the point of export. Import VAT or sales tax is then usually charged on top of the duty-inclusive value.
Why shipments get held
| Cause | How to prevent it |
|---|---|
| Vague goods description | Describe what each item is, what it's made of and what it's for |
| Missing or wrong HS code | Classify every line, and confirm uncertain codes in advance |
| Value looks too low | Declare the real transaction value, including for samples and gifts |
| Documents don't match | Make the invoice, packing list and waybill agree on counts and weights |
| Missing licence or permit | Check whether the goods are controlled before they ship |
| Importer can't be reached | Give a working phone number and email for the consignee |
| Duties unpaid | Agree in advance who pays, and how |
How to clear faster
- Send complete, accurate documents with the shipment, and electronically in advance where possible.
- Make sure the consignee knows the shipment is coming and is ready to pay any charges.
- Settle who pays duties and taxes before the goods ship — that is what the Incoterm is for.
- For regular imports, consider trusted-trader programmes, which many countries offer to reduce inspections for compliant businesses.
- Keep records. If customs asks questions, a quick, documented answer resolves most holds in hours rather than days.
Customs authorities can also review a declaration after the goods have been released, sometimes years later. Accurate classification and valuation are not just about clearing quickly — they protect you from reassessments and penalties down the line.