Canadian motor vehicle 50% duty scope changes take effect September 15
A proclamation changes which Canadian products are covered by the additional 50% duty imposed under Proclamation 11048. Some products are added and some are removed, with the revised scope effective for entries on or after September 15, 2026.
What this affects
CanadaThe update
This proclamation modifies the scope of Canadian products subject to the additional ad valorem duty previously imposed under Proclamation 11048. It states that certain products listed in Annex I, Part A become subject to the 50% additional duty, while certain products listed in Annex I, Part B are no longer subject to that duty.
The proclamation keeps the underlying additional duty at 50% and says it applies in addition to duties imposed under section 232 of the Trade Expansion Act of 1962. It also directs that the Harmonized Tariff Schedule of the United States be modified as provided in Annex II to reflect these scope changes.
The revised scope applies to goods entered for consumption, or withdrawn from warehouse for consumption, on or after 12:01 a.m. eastern time on September 15, 2026. The proclamation authorizes CBP, in consultation with other agencies, to issue implementing guidance and to make any necessary technical or ministerial HTSUS corrections through Federal Register notice.
Impact
For importers of goods from Canada, this changes whether the extra 50% duty applies to specific products, which can alter landed cost and entry filing treatment immediately. Because the proclamation says the duty applies in addition to section 232 duties, affected entries may face stacked duty exposure.
What to watch
The source text provided here does not include the annex lists, so the specific products added or removed are not identified in this entry. CBP may also publish implementing instructions or technical HTSUS corrections that affect how the scope is applied at entry.
How to prepare
- 1Review affected Canadian SKUs
Match current imports against the annex-based scope once the product lists are available in tariff references.
- 2Model added duty exposure
Estimate landed cost changes for entries that may move into or out of the 50% additional duty.
- 3Confirm section 232 overlap
Check whether any covered products also face section 232 duties because this action states the duties stack.
- 4Coordinate with customs broker
Verify entry instructions, HTSUS treatment, and timing for shipments entered on or after the effective time.
Sources
- Modifying the Scope of Products of Canada Subject to the Additional Duties Imposed To Offset Canadian Discrimination Against the Commerce of the United States With Respect to Motor Vehicles · Federal Register · September 14, 2026
- Trump Expands Illegal Section 338 Tariffs Against Canadian Imports - and Bans Some Entirely · Reason Magazine · September 9, 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.