About CalcMyTariff.com

CalcMyTariff.com exists because US tariff policy in 2026 is at its most complex since 1947. Multiple overlapping tariff programs — Section 122 global surcharges, Section 232 product-specific duties, Section 301 China tariffs, bilateral trade deals, and USMCA exemptions — create a stacking puzzle that most importers cannot solve without expensive customs brokers.

The average effective US tariff rate has surged to approximately 13.7% — the highest since 1947. The de minimis exemption ($800 duty-free threshold) has been suspended. Every shipment now faces layered tariffs that interact in non-obvious ways.

We built a free, instant calculator to democratize this information. Amazon FBA sellers, small business importers, and e-commerce operators deserve the same tariff clarity that Fortune 500 companies get from their customs brokers.

Our tariff stacking engine applies the following formula for every country-product combination:

• MFN Base Rate: Most Favored Nation rate — the default WTO-bound tariff
• Section 122 Surcharge: Global uniform surcharge (expires ~July 24, 2026)
• Section 232 Duties: Product-specific duties on steel (50%), aluminum (50%), copper, lumber, autos
• Section 301: Additional tariffs on Chinese goods only, stacked on top
• USMCA: Qualifying goods from Canada and Mexico = 0%

Landed cost also includes MPF (0.3464%, min $33.58, max $651.50) and HMF (0.125%, ocean only). Read our full tariff stacking guide →

Tariff rates are sourced from three authoritative organizations and cross-referenced before publication:

• Tax Foundation — Country-level effective tariff rates and real-time trade policy tracking
• US International Trade Commission (USITC) — Official HTS and MFN base rates
• Penn Wharton Budget Model — Trade volume, economic impact modeling, cross-verification

No rate is published unless confirmed across at least two independent sources. See our editorial policy.

Corrections or feedback? Contact us at contact@calcmytariff.com or visit our contact page.