As of March 10, 2025, the Ontario government has applied a 25 per cent surcharge on all electricity exports to the United States as part of their initial retaliatory measures against US tariffs on Canada. [1] The surcharge will affect 1.5 million homes in Michigan, Minnesota, and New York, costing up to $400,000 every day that it remains in place. Any generator selling electricity to the US is required to add a 25 per cent surcharge valued at $10 per megawatt-hour (MWh) to the cost of power. This surcharge is in addition to the initial round of $30 billion in retaliatory tariffs. Ontario currently exports electricity generated across the province directly to Michigan, New York, and Minnesota. Between 2021 and 2023, Ontario exported 14.6, 14.2, and 12.0 terawatt hours of electricity to the United States. Ontario has 26 transmission connections with neighboring jurisdictions: 11 with Quebec, three with Manitoba, one with Minnesota, four with Michigan, and seven with New York.
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