Three Section 338 proclamations took effect 12:01 a.m. ET on 22 August 2026: alcoholic beverages (11046), dairy (11047), and a broad “motor vehicles” annex (11048) that also reaches cement, plywood, furniture, toys, cosmetics, and more. The extra 50% is additional to ordinary duty. USMCA does not waive it.
Coverage is the 8-digit lines in each proclamation’s Annex II — 554 official codes. It is not “all Canadian goods.” Section 232 goods (steel, aluminum, and other 232 lists) sit outside this 50%.
How to check a SKU
- Get the 8-digit HTS your broker already uses, if you have one.
- Look it up in the scanner. Listed = extra 50% on Canadian origin. Not on the annex = no Section 338 extra (ordinary HTSUS may still apply).
- No code? A product word can hint a category. That stamp is probable, not a determination. Cheese is a common mix-up: “cheddar” looks exposed; heading 0406 is not on the dairy annex.
Origin still matters. A Canadian-origin whisky line on the alcohol annex is listed. The same HTS from another country is not this extra duty.
For a whole catalog, upload CSV or Excel (free for 25 SKUs). Details: exposure calculator.