Import Duty Calculator

US import duties are built from multiple overlapping tariff layers. Each layer is authorized by a different law and administered independently. The total duty you pay is the sum of all applicable layers.

Section 122 Tariff (10%)

Authorized under Section 122 of the Trade Act of 1974, this flat 10% tariff took effect on February 24, 2026. It replaced the IEEPA reciprocal tariffs that the Supreme Court struck down on February 20, 2026. Section 122 applies to all countries equally and expires after 150 days (around July 24, 2026) unless Congress extends it.

Section 232 Surcharges

Section 232 of the Trade Expansion Act of 1962 allows tariffs on imports that threaten national security. Steel and aluminum face 50% surcharges from most countries. Automobiles and auto parts face 25%. These tariffs were not affected by the SCOTUS ruling and remain in full force.

Section 301 Tariffs (China)

Under Section 301 of the Trade Act of 1974, the US imposes additional duties of 7.5% to 100% on thousands of Chinese product categories. Chinese EVs face 100%, solar panels 50%, and EV batteries 25%. These stack on top of the 10% Section 122 tariff — see the China tariff rate guide for the 35% effective math on a $10,000 electronics shipment.

What Is Tariff Stacking?

Stacking means multiple tariff authorities apply to the same shipment at once. For example, steel from China faces 10% (Section 122) + 50% (Section 232) + up to 25% (Section 301) for a combined rate that can exceed 80%. This calculator accounts for stacking automatically based on your country and product selection.

MFN Base Rates and Trade Agreements

Every product also has a Most Favored Nation (MFN) base rate set by the HTS schedule. These range from 0% on many electronics to over 20% on certain textiles and footwear. Free trade agreements like USMCA and KORUS can reduce or eliminate the MFN rate. However, Section 122, 232, and 301 tariffs still apply on top of FTA preferences — for example, EU-origin steel still pays 60% total (10% Section 122 + 50% Section 232) even though the MFN on most steel is already 0%. For the full duty stack on non-steel EU goods, see the EU import duty tariff breakdown. For apparel and pharma sourcing out of South Asia, see the India tariff guide. For high-precision Asia-Pacific electronics, the Taiwan sourcing guide walks the 10% Section 122 + 25% Section 232 semiconductor stack on a $40,000 PCB container.