Import ban replaces 50% duty for certain Canadian dairy products
A proclamation excludes certain Canadian products from importation into the United States beginning September 29, 2026. The ban applies to products listed in the annex that were already subject to additional duties under Proclamation 11047.
What this affects
CanadaThe update
This proclamation excludes certain products of Canada from importation into the United States. It states that the covered goods are set out in the annex and that the ban takes effect for goods imported on or after 12:01 a.m. eastern time on September 29, 2026.
The measure is issued under section 338 after the proclamation finds that Canada maintained the discrimination described in Proclamation 11047. It applies to certain Canadian products that are currently subject to the additional ad valorem duties imposed in Proclamation 11047, replacing those duties with an import ban for the annexed products.
Goods that will be subject to the ban, but were imported before September 29, 2026 and not yet entered for consumption or withdrawn from warehouse for consumption, remain subject to the 50 percent duty rate established by Proclamation 11047. The proclamation also says it does not otherwise affect the products that remain subject to the additional duties under Proclamation 11047, as further established in a separate September 8, 2026 proclamation modifying scope.
CBP is authorized to issue rules, regulations, guidance, instructions, or determinations needed to implement and administer the ban. CBP may also make any necessary HTSUS modifications through a Federal Register notice, including technical or ministerial corrections to the annex.
Impact
For affected imports, this changes the consequence from a surcharge to exclusion at entry once the ban takes effect. That can disrupt purchase orders, routing, and inventory planning, while goods imported before the effective date but not yet entered still face the existing 50 percent duty.
What to watch
The proclamation relies on an annex to define the covered products, but that annex text is not included here. CBP may also publish implementing instructions and HTSUS changes, so scope and administration details may not be clear until those notices appear.
How to prepare
- 1Identify affected Canadian SKUs
Match current imports against the proclamation annex and any CBP implementation notices.
- 2Review import timing
Separate goods imported before and on or after September 29, 2026 for entry planning.
- 3Model duty and exclusion exposure
Estimate which shipments may still face the 50 percent duty and which may be barred.
- 4Confirm broker filing approach
Coordinate on entry status, warehouse withdrawals, and any CBP instructions tied to the ban.
Sources
- Excluding Certain Canadian Products From Importation Into the United States in Response to Continued Discrimination Against the Commerce of the United States With Respect to Dairy · 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.