Duty Assessment
Percentage or specific monetary tax levies applied by customs authorities to imported goods establish the basic import duty payable at cross-border entry points. Customs administration policies specify the exact tariff rate applicable to goods based on their origin and harmonized commodity description code. Importers multiply the customs value of imported merchandise by this statutory percentage to calculate total customs duties owed upon entry.
Governed by international trade agreements and national revenue statutes, these schedules determine trade costs for cross-border supply chains.
Customs Calculation
Revenue officials calculate duty liability using ad valorem rates based on invoice value or specific rates based on unit weight and physical quantity. Under tariff rate schedules, preferential rates apply to imports originating from nations with active free trade agreements. Importers submit customs declarations containing invoice values and origin certificates to verify accurate duty calculations.
Imposition of temporary trade remedies, antidumping duties or safeguard tariffs increases the effective rate payable above the baseline statutory duty. Customs audits examine valuation documentation and classification accuracy to collect unpaid duties and assess civil penalties for non-compliance.
Exemption Threshold
Duty exemption allowances and de minimis thresholds exclude low-value shipments from standard duty assessment rules. Unannounced tariff rate revisions by sovereign nations alter landed product costs instantly, disrupting existing procurement contracts.