08:14 AM EDT, 05/28/2025 (MT Newswires) -- United States President Donald Trump said late Tuesday that Canada's share of his 'Golden Dome' missile defense proposal would be $61 billion, noted Scotiabank.

Presumably, Trump is talking US dollars, so at the current spot exchange rate, that's about C$84 billion, said the bank.

Scotiabank expects the project's final pricetag to be "much bigger." That's because Trump's total tally for the project of $175 billion is at the low end of the CBO's estimated cost, which stretches to about half a trillion US dollars.

Canada's implied share of the project would be 35% if the bank goes with Trump's numbers. If it went with the high range and the same implied share, then Canada's cost could balloon to about US$175 billion, or C$240 billion.

It's an unproven technology that would take many years longer to deploy than Trump's three-year claim and cost an "awful lot more," added Scotiabank.

Signing on wouldn't help the image the Canadian government of Prime Minister Mark Carney is trying to cultivate by way of being more fiscally prudent than the prior government of PM Justin Trudeau, according to the bank.