Customs Notice 25-10: United States Surtax Order (2025-1) Ottawa, March 4, 2025 United States Surtax Order (2025-1) 1. This notice provides information on the application of the United States Surtax Order (2025-1), specifically regarding surtax provisions effective March 4, 2025, on certain goods originating in the United States (U.S.). 2. The surtax is introduced by Canada in response to the U.S.’ imposition of tariffs on goods imported into the U.S. from Canada. 3. The administration of the United States Surtax Order (2025-1) is the responsibility of the Canada Border Services Agency (CBSA). To read the full document go here: https://www.cbsa-asfc.gc.ca/publications/cn-ad/cn25-10-eng.html