Canada–US Tariff Escalation and China–Canada Duties: Tax and Business Implications

Summary

On August 25, 2026, Accounting Today reported that Prime Minister Mark Carney matched President Trump's latest tariffs with counter-measures: counter-tariffs on US steel and aluminum products are doubled to 50%, and new 50% duties apply to US milk, furniture, clothing and apparel, video-game consoles, smartphones and other electronics. Appliances, cheese, fish and seafood, and certain steel and aluminum derivative products face 25%, while a range of US machinery, industrial tools and farm equipment carry 15%. The counter-tariffs take effect September 8 and cover roughly US$20 billion of annual US exports to Canada — about 6% of US exports to Canada last year.

The move marks a sharp reversal of Carney's earlier olive-branch approach, after trade talks collapsed the previous week. Canadian officials said the goal of the measures is not to raise revenue but to support the market share of Canadian firms that stand to lose US sales. Ottawa also unveiled a C$7.5 billion support package: liquidity support for small and medium-sized businesses, grants to accelerate projects hit by US tariffs, and extended, more flexible employment insurance in affected sectors. The Business Development Bank of Canada is offering C$500 million in loans, with no capital repayments required for 36 months.

Separately, China's State Council Tariff Commission announced on February 27, 2026 adjustments to its additional tariffs on certain goods originating from Canada. For businesses trading across both the Pacific and the Canada–US border, cost and compliance pressure now comes from several directions at once.

Sources

Our Take

Tariffs are a tax event. They change import costs, inventory valuation and cash flow. Importers should re-verify HS classification, rules of origin and declared value, and model how the duties pass through to pricing and margins. Cross-border businesses should revisit supply chains and contract terms — INCOTERMS and who actually bears the duty — and make use of the announced support measures (BDC loans, liquidity support, grants) to manage cash flow through the disruption.

On the tax side, duties become part of import cost, affecting the GST/HST base, inventory cost and the timing of income tax deductions; duty refund, bond and installment mechanisms may also apply. With US duties and Chinese duties layering onto Canadian goods, the compliance burden for cross-border operators is rising quickly, and the cost of getting classification or valuation wrong is higher than ever.

Businesses should run tariff-impact and cash-flow scenarios now, build the new duties into pricing and budgets, and consult a CPA with cross-border experience before making significant operational or structural decisions.

Disclaimer: This article is general information only and does not constitute tax advice; it should not substitute professional tax counsel. Please consult a licensed CPA for advice specific to your situation.