Enter HS + origin + destination. See MFN, §301, §232, §122, anti-dumping stacked.
Preset noteIEEPA layers (20% fentanyl + reciprocal) struck down Feb 2026 — replaced by §122 15% global ceiling.
| Layer | Base value | Duty | Running total |
|---|---|---|---|
| MFN HTSUS 6109.10.00 | $10,000.00 | $1,650.00 | $11,650.00 |
| §301 List 4A | $10,000.00 | $750.00 | $12,400.00 |
| §122 Temporary Global | $10,000.00 | $1,500.00 | $13,900.00 |
Total duty
$3,900.00
Effective ad-valorem
39.00%
Customs value + duty
$13,900.00
What this calculator does. Stacks ad-valorem and specific duty layers on a customs value. Most US tariff layers (MFN HTSUS, §301, §232, §122, antidumping) all read the customs value as their base — they ADD, they don't compound. Where a regime explicitly compounds (some specific tax bases, downstream VAT), switch the base column to "Running total".
Bases differ by jurisdiction. US duties: customs value (FOB-equivalent, transaction value method). EU duties: customs value (CIF). China import duty: CIF. Japan: CIF + freight + insurance per JCG. Use the customs value field consistent with the destination customs basis.
Effective rate. Total duty ÷ customs value × 100%, expressed ad-valorem. Useful for landed-cost comparisons and CIF margin modeling regardless of how each individual layer is denominated.
Sources. Layer rates in presets reflect rules tracked in data/policy_manifest.py as of the last verified date in that file. Real declarations should reference current CBP CSMS bulletins, USTR notices, EU TARIC, China MOFCOM tariff schedule, or your destination's equivalent.
Estimate only — verify with a licensed customs broker before booking.