Articles
Long-form guides on how U.S. tariffs actually stack, with worked examples and citations back to the official source.
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August 3, 2026
The 100% pharmaceutical tariff: what importers need to know before September 29
A Section 232 action puts up to 100% on patented pharmaceuticals and their ingredients from September 29, 2026. The headline rate is not what most lines pay, the arithmetic differs by country, and the biggest exemption cannot be determined from your HTS code. Here is how the duty actually resolves.
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July 23, 2026
The Section 122 reciprocal surcharge ends July 24: what changes for your rates
The 10% Section 122 reciprocal surcharge is scheduled to expire after July 23, 2026. From July 24, most import lines drop 10 points, unless the surcharge was already suppressed by Section 232 or an exemption. Here is what moves, what does not, and how to price the boundary.
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July 23, 2026
Brazil's 25% Section 301 tariff: what importers need to check
On July 22, 2026, an additional 25% Section 301 duty took effect on all products of Brazil under HTS 9903.05.01. It is country-wide, it stacks on your base rate, and it carves out goods already subject to Section 232. Here is how it resolves and what to check on Brazilian lines.
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July 22, 2026
Canada's 50% Section 338 tariff: what importers should do before August 19
An additional 50% duty on certain Canadian goods takes effect on August 19, 2026, under a statute that has been dormant since the 1930s. USMCA origination will not exempt you. Here is who is exposed, who is carved out, and what to check on open purchase orders now.
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May 27, 2026
How HTS tariff stacking actually works (with worked examples)
A duty rate is rarely one number. Most U.S. imports pay several duties at once, and some duties suppress others by law. Here is the order, the carve-outs, and three worked examples you can verify against the official source.