• Ontario’s 25% electricity export tariff remains suspended but could be reinstated at any time.
  • The move is part of escalating trade tensions between Canada and the U.S., with President Trump threatening reciprocal tariffs.
  • U.S. states reliant on Ontario power face potential price hikes and market disruptions if the tax returns.

A Temporary Truce with Lingering Threats

Ontario Premier Doug Ford has left the door open to reinstating a 25% tariff on electricity exports to the U.S., despite suspending the measure just two days after its March 10 implementation. The pause followed high-level talks with U.S. Commerce Secretary Howard Lutnik, but Ford’s government has made it clear the tax remains a bargaining chip in ongoing trade disputes.

President Trump responded to Ontario’s initial move by threatening to double U.S. tariffs on Canadian aluminum and steel to 50%, escalating a tit-for-tat exchange that has rattled energy markets. Both sides have agreed to further negotiations ahead of an April 2 deadline, but the uncertainty has left grid operators and consumers on edge.

Market and Political Fallout

The proposed tariff, which would add roughly $10/MWh to cross-border power flows, could cost U.S. consumers—particularly in New York, Michigan, and Minnesota—an estimated $150 million annually. While the immediate suspension eased fears of market instability, the IESO (Ontario’s grid operator) continues to maintain the legal framework needed to reactivate the surcharge if talks collapse.

U.S. regulators, including FERC, are debating how to respond, with disagreements over whether Customs or regional grid operators would enforce any retaliatory measures. Meanwhile, politicians like Senator Richard Blumenthal and advocacy groups such as Public Citizen have warned against policies that could inflate consumer energy bills.

A Fragile Energy Relationship

Canada and the U.S. have long relied on integrated electricity markets, making Ontario’s tariff threat a rare and disruptive tactic. While the province could gain short-term revenue from reinstating the tax, analysts warn it risks long-term damage to cross-border energy cooperation. Market participants are already bracing for volatility, with some U.S. states exploring alternative power sources to mitigate reliance on Canadian imports.

Ford’s government has not disclosed its next steps, but with Trump’s April 2 deadline looming, the specter of renewed trade hostilities—and higher electricity costs—remains very real.