Know the exact cost of importing goods before they ship. Our deterministic engine calculates duty, MPF, HMF, Section 301 surcharges, IEEPA ad valorem additions, and USMCA savings — with every number citing its legal authority. Sub-millisecond math across 176+ jurisdictions, built for checkout integrations, ERP systems, and compliance teams that need auditable numbers.
The ad valorem or specific rate from HTSUS General column, applied to the transaction value per 19 USC 1401a. For goods with both ad valorem and specific components (compound duties), both are calculated and summed. The engine uses the rate effective on the arrival date, not the order date.
0.3464% of the appraised value for formal entries, per 19 CFR 24.23(b)(1). Minimum $31.67, maximum $614.35 per entry. Informal entries (under $2,500) pay a flat fee of $2.00, $6.00, or $9.00 depending on entry type. The engine selects the correct fee schedule automatically.
$0.125 per $1,000 of cargo value for imports arriving by vessel, per 26 USC 4461. Does not apply to truck or air shipments. Does not apply to goods arriving from Canada, Mexico (by truck/rail), or US insular possessions. The engine checks the mode of transport and exemptions automatically.
Section 301 (China Lists 1-4B), Section 201 (safeguard), Section 232 (steel/aluminum), and IEEPA reciprocal tariffs are layered on top of base duty. Each surcharge references its specific Executive Order, Federal Register notice, and effective date. Rates change frequently — the engine tracks every update.
Submit HTS code, declared value, country of origin, quantity, weight, and arrival port. If you do not have an HTS code yet, chain the request with our /classify endpoint — one call classifies and calculates in sequence. The API also accepts commercial invoice PDFs for automatic extraction.
The engine applies the current duty rate from the HTSUS General column, calculates Merchandise Processing Fee (0.3464% of value, min $31.67 / max $614.35 per 19 CFR 24.23), Harbor Maintenance Fee ($0.125 per $1,000 for ocean shipments per 26 USC 4461), and any applicable surcharges — Section 301, Section 201, Section 232, or IEEPA ad valorem additions.
If goods qualify under USMCA (SPI "S"), GSP, CAFTA-DR, or other FTAs, preferential rates are applied automatically. The engine checks rules of origin, tariff shift requirements, and regional value content thresholds. You see both the MFN rate and the preferential rate side by side with the savings amount.
Every line item in the response cites its legal authority — the specific HTSUS subheading, CFR section, USC provision, or Executive Order that produces the number. No black-box estimates. Your compliance team can audit every cent against the statute that authorizes it.
Landed cost is pure deterministic math — no AI inference required. The engine runs in under 1ms for a single line item. Batch 1,000 line items and get results in under 100ms. Fast enough to run at checkout without adding latency.
MPF cites 19 CFR 24.23. HMF cites 26 USC 4461. Section 301 cites USTR List 3/4A/4B with Federal Register references. IEEPA surcharges cite Executive Order 14257. Your auditors and CBP can trace every fee to its source.
The engine tracks IEEPA surcharge schedules by country and effective date. China rates, reciprocal tariffs, and country-specific adjustments are applied based on the arrival date you provide. Historical rates are preserved for drawback and post-entry amendment calculations.
Calculate landed costs for imports into the US, EU, UK, Canada, Mexico, Australia, Japan, South Korea, Brazil, India, Switzerland, and 165 more. Each jurisdiction applies its own tariff schedule, VAT/GST rules, and preferential programs.
If an HTS code is subject to antidumping or countervailing duties from a specific country of origin, the engine flags it with the applicable AD/CVD case number and estimated additional duty. No surprise bills from CBP months after entry.
Embed the calculator in your e-commerce checkout to show buyers the exact total at point of sale — product price, shipping, duties, taxes, and fees. Eliminate the COD customs bill that kills conversion rates for cross-border sellers.
Try the calculator on GMX.Express with no code, or integrate the duty engine into your platform via our REST API. Every calculation is instant and fully cited.
Goldmex International, LLC · 2345 Michael Faraday Dr, Ste 8, San Diego, CA 92154
Licensed US Customs Broker \· Customs Intelligence Technology