Customs Import Duty & Merchandise Processing Fee (MPF) Calculator
Calculates estimated U.S. customs duties and MPF fees based on entered customs value and duty rate.
Notice: engineering verification utility. Use test or de-identified data and verify results independently before relying on them.
How it works
Standard: U.S. Customs and Border Protection (CBP) Duty Guidelines
Formula: Duty = Customs Value * Duty Rate; MPF = Min(Max(Customs Value * 0.003464, 31.67), 614.35)
Checks: Positive customs value and duty percentage
Calculated locally in browser memory; nothing leaves your browser.
Deterministic local-first client-side execution. Provided as-is without warranty.