Import restrictions & originUSA

US tariffs on Canadian-origin goods: revised rules now in force, import bans from 29 September

The revised 50% additional-duty lists and narrower exemption took effect on 15 September. UK sellers of affected Canadian-origin stock should check broker declarations and landed costs now. Separate selected-product import bans remain scheduled for 29 September.

By Scott GillettPublished 9 Sept 2026Last reviewed 15 Sept 2026Destination: United States

WHEN IT APPLIESPartly in force

Who this affects: UK businesses supplying affected Canadian-origin goods into the United States, including stock dispatched from a UK warehouse.
Seller action: Check before sending affected goods
Ask your US broker to recheck the product classification, Chapter 99 additional-duty code, any exemption and landed cost against CBP’s revised list. Tariff changes apply from 15 September; selected-product import bans apply from 29 September 2026.
Effective dates / current position: Tariff-list changes: 15 September 2026 at 00:01 (America/New York) — In force
Selected-product import bans: 29 September 2026 at 00:01 (America/New York) — Upcoming—not yet in force
Timing follows the confirmed published schedule; it is not a fresh legal review.
Last reviewed: 15 Sept 2026 — an editorial source check, separate from automatic timing.
Official source: Open the primary source ↗

Updates to this article

13 September 2026
Added CBP’s 11 September filing instructions, the revised tariff-code list and the narrower 9903.03.15 exemption. Clarified that some removed broad codes are replaced by narrower chargeable codes. The 15 September tariff and 29 September import-ban dates, original publication date and article address are unchanged.
15 September 2026
Rechecked CBP’s instructions and marked the tariff-list changes as now in force. Added an immediate check of broker declarations and DDP costs, distinguishing the US entry date from UK dispatch. The separate 29 September import bans remain upcoming; original publication date and URL retained.

Recorded editorial changes. Automatic timing labels do not change the publication or review dates.

Action required for affected Canadian-origin goods. The White House announced these measures on 8 September 2026. The published dates are 15 September for tariff-list changes and 29 September for the import bans. The timing summary above tracks each phase separately. This is not a new general restriction on UK-origin goods.

Updated 15 September 2026: tariff changes now in force. The revised Section 338 tariff lists and narrower exemption apply from 12:01 a.m. Eastern Time on 15 September. If you sell affected Canadian-origin stock to US customers, your broker’s declarations and your landed-cost calculations should now reflect the revised treatment. This is the previously announced tariff change taking effect—not a new blanket tariff on Canadian goods. The separate import bans remain scheduled for 29 September.

What changes on 29 September?

From 12:01 a.m. Eastern Time on 29 September 2026, the United States will prohibit imports of selected Canadian-origin products listed in three presidential proclamations. Paying extra duty will not make a prohibited import permissible.

The covered groups are:

Listed alcoholic beverages. Check the precise tariff subheading and any packaging limitation. For entries marked “Packaged”, the annex refers to bottles, cans, boxes, kegs and similar containers for direct consumption. Do not treat this as a ban on every Canadian alcoholic product.
Specified whey and related products, molasses and non-alcoholic beer. Only the listed classifications are covered; non-alcoholic beer appears under 2202.91.00.
Motorcycles and cycles with reciprocating internal-combustion piston engines over 800 cc. The motor-vehicle annex identifies tariff subheading 8711.50.00. It does not prohibit every Canadian vehicle or motorcycle.

Check your full ten-digit US classification against the annex’s listed tariff provisions and scope restrictions. Product category names are only a starting point.

Tariff changes in force from 15 September

Separate proclamations change the products covered by the existing additional 50% Section 338 tariff. These changes apply to goods entered for consumption, or withdrawn from warehouse for consumption, from 12:01 a.m. Eastern Time on 15 September 2026.

The revised lists add specified products across categories including cheeses, paper, metal articles, vehicles, boats and furniture, and remove some previously covered tariff items. Do not assume that a whole category has been added or exempted. Removal from this particular tariff does not remove other applicable duties.

CBP filing instructions: what sellers should check

CBP CSMS #69851916, issued on 11 September 2026 at 4:49 p.m. Eastern Time, explains how importers and brokers must declare the revised duties. It implements the previously announced changes rather than introducing a new general tariff on UK goods.

122 additional HTSUS classifications. The revised list adds products under additional-duty headings 9903.03.12 or 9903.03.14. The list contains both eight- and ten-digit classifications, not 122 ten-digit codes.
Ten eight-digit provisions are removed, but this is not blanket relief. Narrower ten-digit classifications within some of those provisions remain covered. For example, 2208.70.00 is removed as a broad provision, but 2208.70.0030 is added. Check the complete revised list against the precise product, not just the removed-code list.
The product list under 9903.03.13 is unchanged. However, from 15 September, only goods subject to 9903.03.13 can claim the existing 9903.03.15 exemption, and they must still meet its conditions.

What does that exemption mean? Heading 9903.03.15 provides a 0% rate for this additional Section 338 duty on qualifying goods. It does not mean that every import charge is zero. A product that previously qualified may lose access to that exemption under the revised rules. Other applicable duties, anti-dumping or countervailing duties, taxes and fees can still apply.

The Chapter 99 number tells US customs which additional-duty treatment applies. It does not replace the product’s normal HTSUS classification. Give your US broker the product details and origin evidence, then ask them to confirm both codes and the total duty before you update your landed costs or selling prices.

Download CBP’s complete tariff-code list applying from 15 September 2026 (Word document) ↗

The 15 September changes concern duty liability. The 29 September measures are import prohibitions. They are not interchangeable.

What if goods are already on their way?

The ban proclamations distinguish importation from entry for consumption. Covered goods imported before the 29 September cutoff but not entered for consumption, or withdrawn from warehouse for consumption, before that time remain subject to the additional 50% duty.

This is not a general exemption for goods dispatched before 29 September. Ask the US customs broker to confirm the relevant importation and entry dates. Obtain your carrier’s acceptance cutoff; it may be earlier than the legal deadline.

What should UK sellers check?

Identify Canadian-origin stock sold into the US, including goods held in a UK warehouse. UK dispatch does not change customs origin.
Match each product’s classification, specification and packaging to the official annexes.
Ask the US importer or broker whether the shipment faces a revised tariff, an import ban or neither.
Ask the broker to recheck the applicable Chapter 99 additional-duty heading and any exemption, including 9903.03.15, and confirm the full landed cost.
Make sure DDP quotations and selling prices reflect the revised duty where it applies. The relevant tariff date is entry for consumption or withdrawal from warehouse for consumption in the US—not the date the parcel leaves the UK.
Review orders and delivery promises before accepting further sales of affected products.
Keep origin evidence and obtain written clearance instructions before dispatch.

These measures concern Canadian-origin goods entering the US. They are separate from Canada’s counter-tariffs on US-origin goods entering Canada.

For the original background, read US 50% tariffs on selected Canadian goods take effect—published 22 August 2026.

Specialist detail for importers and brokers

Drawback, Chapter 98 entries and US foreign-trade zones

These are specialist clearance arrangements, not extra steps every UK parcel seller must complete.

Drawback: CBP confirms that duties under 9903.03.12 to 9903.03.14 are eligible for drawback—a possible duty refund under the applicable rules. This is not an automatic refund; the importer or broker should check eligibility and evidence.
Chapter 98: properly claimed special-entry provisions can change whether the additional duty applies, but exceptions include subchapter XXIII, 9802.00.40, 9802.00.50, 9802.00.60 and 9802.00.80. For the listed repair, alteration and processing provisions, duty applies to that work’s value; for 9802.00.80 it applies to the assembled article’s value less the qualifying US products’ cost or value. Ask the broker to apply the exact CBP instructions.
US foreign-trade zones: affected goods must be admitted under “privileged foreign status” unless eligible for “domestic status”. The additional duty applies when the goods enter US commerce for consumption. This is a US customs-zone procedure, not a rule for an ordinary UK warehouse.

Read the full CBP instructions before using a specialist procedure ↗.

Official sources

The following White House proclamations and annexes were published on 8 September 2026: