How are customs charges assessed?
Why classification, value and current national rules matter when estimating customs charges.

There is no universal percentage
Charges depend on the importing country, classification, customs value and applicable rules. Taxes, duties, service fees, storage and inland transport can have different bases. For Iran, verify the rates and exemptions applicable when declaring the goods; another country’s rates cannot be substituted.
Classification and customs value
Prepare material, use, composition, model and technical specifications. HS is internationally harmonised at six digits, with further national subdivisions. Invoice price alone may not be the entire customs valuation basis; relevant additions and national rules must be checked.
Separate the budget items
Request separate estimates for duties and taxes, permits and services, port and storage costs, clearance fees and inland transport. Identify confirmed and estimated amounts. Longer dwell time can change the total without any tariff-rate change.
Documents for assessment
Provide invoice, packing list, origin, technical specifications, transport mode and permit information. Treat any estimate as provisional until classification and current rules are checked. This article is educational, not a current tariff quotation or import approval.
An auditable estimate
Record each charge’s base, rate, currency, date and supporting document. Keep warehouse/port service fees distinct from customs duties. Reconcile the estimate with the actual declaration and invoices.
Before you proceed
- Confirm scope and references.
- Use final cargo data.
- Keep the approved version.
Ready for your next shipment.
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