Amazon Seller Briefing: September 9, 2026

Canada's counter-tariffs on US-origin goods took effect September 8, 2026, covering C$27.6 billion of imports at 15%, 25% and 50%, now published at HS-code level. Today is also the FBA inbound deadline for Prime Big Deal Days using minimal shipment splits.

Published September 9, 2026 · Seller Signal daily briefing

Good morning, sellers! Welcome to September 9, 2026's edition. Today: Canada's counter-tariffs are live and readable at HS-code level, today is the FBA inbound deadline for Prime Big Deal Days, and Walmart is spending tariff-refund money you may also be owed. Let's dive in…

Data gathered at 6:05 AM ET, September 9, 2026.

1. Top Story of the Day

Canada's counter-tariffs are in force, and now checkable line by line

What happened: Canada's counter-tariffs on US-origin goods took effect at 12:01 a.m. on September 8, 2026, covering C$27.6 billion of imports at 15%, 25% and 50%, each rate matching the corresponding US Section 338 or Section 232 rate. The 50% band covers textiles and clothing, plastics, beauty and personal care, pulp and paper, plywood, glass containers, dairy and most steel; the 25% band covers sawn wood, coated papers, tissues, carpets, cooking appliances, radiators and kitchen articles.

Why it matters: This publication previewed the measures on September 7; two things have changed. The in-transit carve-out has closed — freight moving toward Canada on September 8 is exempt, and a purchase order dated before that day earns no protection unless the goods were under way. And the schedule is now published at HS-code level, so category names are no longer a safe proxy: cotton T-shirts (6109.10.00), cotton pullovers (6110.20.00), smartphones (8517.13.00) and plastic household furniture (9403.70.10) all draw 50%, while split-system air conditioners (8415.10.00) draw 15%.

Expert take: The surtax applies to the customs value declared on entry, not the Amazon.ca list price — a unit entering at C$40 under the 50% band carries C$20 of duty, so the hit scales with landed cost. Coverage turns on CUSMA country-of-origin marking rules, so a China-made unit shipped from a US 3PL is not automatically in scope. Origin governs; shipping point does not.

Action items:

Check the HS codes your broker actually declares, not the ones you assume — the 50% band splits categories internally.
Reprice on customs value. Multiplying the rate against your Amazon.ca list price overstates the duty.
Confirm transit status on anything already booked — the exemption attaches to freight in motion on September 8, not to the order date.

Sources: Department of Finance Canada; HS codes per EcomCrew, September 6, 2026.

2. Amazon Policy & Program Updates

FBA & Fulfillment

Today, September 9, 2026, is the FBA inbound deadline for Prime Big Deal Days using minimal shipment splits. September 16 is the deadline using Amazon-optimized splits; the AWD deadline passed September 2. (EcomCrew)

Since September 1, 2026, international FBA shipments into fulfilment centres in the UK, Germany, France, Italy and Spain must carry a seven-day delivery window — an estimated arrival range for the centre, which is not the ship date. Amazon Global Logistics and the Partnered Carrier Programme populate it automatically; every other carrier leaves it to you to enter by hand. Amazon's stated consequence for an inaccurate window is that it may not be able to receive the inventory quickly — a receiving delay, in the quarter where that is the expensive one. (ChannelX)

Featured Offer

Amazon is removing the seller eligibility requirements for the Featured Offer: "Starting in July 2026, we'll begin removing seller eligibility requirements for the Featured Offer. This change will roll out gradually across all Amazon stores globally, completing by the end of 2026." The two-step process — screen sellers on performance, then rank the survivors — collapses to ranking alone. Selection criteria are unchanged: competitive pricing, delivery speed and performance.

Your own path does not change; the set of offers ranked against you grows as the rollout reaches your categories, inside the peak window. (Amazon Seller Forums)

2A. False Alarms & Noise Filter

Monitoring — "Amazon launched a Reorder and Save programme that takes 10% out of seller margin."

What we actually know: The buyer-facing half is real — eligible products carry a label reading "Save 10% when you reorder 5 qualifying items with Prime," across groceries, household supplies, baby products and personal care. Who funds it is not established. Amazon has published no seller-facing announcement, and the claim that the discount draws on existing Subscribe & Save seller-funded settings is unconfirmed by Amazon in the reporting that makes it. Check your own Subscribe & Save discount setting before assuming an exposure. (My Amazon Guy)

3. Marketplace Opportunities & Threats

Walmart is spending tariff-refund money, and yours may still be sitting at CBP

Setup: Walmart US ran more than 11,000 price rollbacks in the quarter ended July 31, 2026, against roughly 7,200 the prior quarter — more than half again as many — funded with $2.9 billion in IEEPA tariff refunds, the largest sum reported by any US company. Any seller who paid IEEPA duties may have a claim on the same pool.

Math: The refunds follow the Supreme Court's February 20, 2026 ruling, 6-3 by Chief Justice Roberts, that IEEPA does not authorise the President to impose tariffs; more than $160 billion was collected under it. CFO John David Rainey said Walmart has received "substantially all" of what it was eligible for and is directing it to price rather than profit.

Window: Importers generally have 180 days after an entry is liquidated to file a protest with CBP requesting a refund. The Court of International Trade is still working through the mechanism.

Execute: Get entry summaries and liquidation dates from your customs broker, mark which entries carried IEEPA duties, and calendar the 180-day deadline on each — it runs per entry, not per company. Meanwhile price Q4 on the assumption the floor keeps moving. (CBS News)

4. Seller Community Pulse

Ziel Home Furnishing Technology, a Shenzhen-listed cross-border home goods seller, disclosed a deliberate channel swap for the first half of 2026: third-party Seller Central revenue fell 40.25% to RMB 1.447 billion, from 60.44% to 30.17% of core revenue, while first-party Vendor Central revenue rose 406.31% to RMB 1.866 billion, from 9.20% to 38.91%. Total revenue grew 19.32% and net profit rose 29.16%.

One disclosure is not a trend, and a seller at that scale has 1P options most accounts do not. What it establishes is that channel mix is being actively solved for. (EcomCrew)

5. Looking Ahead

September 9: FBA inbound deadline for Prime Big Deal Days, minimal shipment splits.
September 16: FBA inbound deadline for Prime Big Deal Days, Amazon-optimized splits.
September 17: PBI3 Port St. Lucie fulfillment center closes.
September 22-24: Amazon Accelerate 2026 in Seattle; CBP Entry Type 13 deploys to ACE September 22.
September 30: Business Hour Delivery Rate takes effect for US seller-fulfilled Amazon Business orders.
October 14, 21 and 28: BFCM inbound deadlines — AWD, minimal splits, Amazon-optimized splits.
October 15: FBA holiday peak fulfillment fees begin, through January 14, 2027, averaging $0.32 per unit.
October 17: Weekend orders stop being excluded from Seller Fulfilled Prime speed metrics.
October 20: Black Friday Week and Cyber Monday deal submission closes.
October 25: Amazon Shipping peak demand surcharges begin, through January 16, 2027.
November 2: Commercial liability insurance changes take effect for 11 enhanced-safety categories.

All dates 2026 unless stated; Q4 deadlines per EcomCrew.