Trade-compliance firm GHY reported on 26 August 2026 that Canada's United States Surtax Order (2026) takes effect at 12:01 a.m. on 8 September 2026. It applies duties of 15%, 25% or 50%, depending on the tariff item, to about C$27.6 billion of US-origin imports including steel, appliances, agricultural equipment, electronics and clothing.

Canada says it is responding to US tariffs under Section 338 and Section 232. The surtax applies only to goods meeting CUSMA US-origin marking rules, and goods already in transit on 8 September are exempt with documentation.

Source: GHY - Canada's Surtax on U.S. Goods