US-Canada Tariff War Escalates to 50% as Amazon's Canadian Growth Plans Hold Steady
US-Canada tariffs escalated to 50% on roughly $20 billion of Canadian goods effective August 19, with Canada set to retaliate dollar-for-dollar starting September 8. Despite the tariff war, Amazon's Canadian expansion plans have continued largely unchanged, according to internal documents reviewed by Business Insider. Oxford Economics attributes a modest 0.1 percentage point US GDP drag to the broader trade escalation, not the auto tariffs alone, which it calls a rounding error on their own. Cross-border electricity trade, including a $6 billion transmission line supplying up to 20% of New York City's power, faces renewed scrutiny after a 2025 Ontario tariff precedent.
The US-Canada trade relationship escalated sharply in August 2026: President Trump's new 50% tariffs on Canadian imports, invoked under Section 338 of the Tariff Act and effective August 19, cover roughly $20 billion a year in Canadian goods, including dairy, alcohol, and motor vehicles and parts, with no exemption for goods that would otherwise qualify under USMCA.
Despite the escalation, AMZN has not pulled back in Canada. Business Insider reporting on internal company documents found Amazon's fulfillment and same-day delivery expansion plans continued largely unchanged after the tariff announcement, and the company's own forecasts suggest trade tensions have not yet derailed its Canadian growth ambitions . Amazon has invested more than C$65 billion (about $47 billion) in Canada since 2010 and employs over 46,000 people there, and internal documents show it expects Canadian package volume to grow faster, percentage-wise, than in the US over the next several years . The one concrete adjustment on record predates the 50% tariff: in March 2026, Amazon shifted some direct-import sourcing from the US to China to avoid tariffs, a change made months before the July 2026 escalation .
The tariff war carries a macro dimension too, though the numbers are more modest than the headline escalation might suggest. Oxford Economics estimates the broader US-Canada tariff escalation, not the auto tariffs specifically, could trim about 0.1 percentage point off US GDP growth next year, and its US economist called the auto-tariff-only impact on its own a rounding error. Threatened 50% tariffs on Canadian autos and parts, if imposed, would take effect January 1, 2027 and could push the US effective tariff rate as high as 10.4%, though Oxford noted Canadian retaliation could amplify the drag.
Cross-border electricity trade is also exposed. The US and Canada traded about $3.2 billion in electricity in 2025, two-thirds of it Canadian power flowing into the US, and the Champlain-Hudson Power Express, a $6 billion transmission line that began delivering Canadian hydropower to New York City in June, supplies up to about 20% of the city's electricity needs. A 2025 precedent shows how quickly such measures can reverse: Ontario imposed a 25% tariff on power exports to the US that year, then eliminated it a day later once tensions eased. ISO New England says a reduced-import scenario would likely show up mainly as higher wholesale prices rather than reliability problems under typical weather, though supplies could tighten in extreme conditions .
Canada's retaliation is no longer hypothetical: Prime Minister Mark Carney has pledged dollar-for-dollar tariffs on US goods starting September 8, 2026. Taken together, the sourced picture is more nuanced than a single-company crisis: the trade and grid exposure is real and quantifiable, but Amazon's Canadian growth strategy, so far, is the part of the story that has not changed.
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