50% additional duty set on certain Canadian products
A proclamation imposes an additional 50% duty on certain products of Canada identified in Annex II, effective August 19, 2026. The action is framed as a Section 338 response to Canada's treatment of U.S. motor vehicle exports.
What this affects
CanadaThe update
This proclamation finds that Canada discriminates against U.S. commerce through its motor vehicle tariff system and, under Section 338 of the Tariff Act of 1930, imposes an additional 50% ad valorem duty on certain products of Canada. The covered products are those identified in Annex II to the proclamation. The duty is effective for goods entered for consumption, or withdrawn from warehouse for consumption, on or after 12:01 a.m. eastern time on August 19, 2026.
The proclamation states that the new duty is in addition to other applicable duties, taxes, fees, exactions, and charges, unless otherwise provided in the proclamation or Annex I. It also states that the duty does not apply to articles already subject to Section 232 duties, or to articles, excluding unmanned aircraft, subject to the World Trade Organization Agreement on Trade in Civil Aircraft. The HTSUS is to be modified as provided in Annex II, and those modifications continue unless the action is expressly reduced, modified, or terminated.
For foreign trade zone treatment, covered products admitted on or after the effective date must be entered in privileged foreign status unless they are eligible for domestic status. CBP is authorized, in consultation with other agencies, to issue rules, guidance, instructions, determinations, and any needed technical HTSUS corrections through Federal Register notice. The proclamation also says inconsistent prior proclamations and Executive Orders are superseded to the extent of the inconsistency.
Impact
For importers of covered Canadian goods, this measure can materially raise landed cost because the 50% duty is additional to other charges unless an exception applies. It also adds compliance work around product coverage, HTSUS treatment, and foreign trade zone handling before the August 19, 2026 effective time.
What to watch
The source text provided here does not include the annex pages that identify the actual covered products and HTSUS modifications, so product scope cannot be confirmed from this extract alone. It is also easy to misread the measure as applying to all Canadian goods when the proclamation says it applies only to certain products of Canada listed in Annex II.
How to prepare
- 1Identify Annex II product coverage
Match affected SKUs and tariff classifications to the annex before the effective date.
- 2Model the added duty cost
Estimate landed cost and cash flow impact from the additional 50% duty.
- 3Confirm origin records
Keep documentation that supports whether goods are products of Canada for tariff purposes.
- 4Review FTZ entry handling
Covered goods entering a foreign trade zone may need privileged foreign status.
- 5Coordinate with customs broker
Confirm entry timing, HTSUS updates, and any CBP implementation guidance.
Sources
- Imposing Additional Duties To Offset Canadian Discrimination Against the Commerce of the United States With Respect to Motor Vehicles · Federal Register · July 23, 2026
- Trump administration to impose new 50% Section 338 tariffs on Canadian autos, alcohol and dairy · Dentons · July 21, 2026
- Trump administration imposes 50% tariffs on certain Canadian products in first use of Section 338 · White & Case LLP · July 24, 2026
- US Trade Update: Section 338 Tariffs on Canada, IEEPA Refund Litigation, Trade Fraud Enforcement & Section 232 Expansion · The National Law Review · July 23, 2026
We summarize published reporting and official notices. Always confirm rates and dates against the Federal Register or your customs broker before acting on them.