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A 25 per cent tariff applied across the board would increase the cost of those exports by $148.5 billion.

The U.S. is by far Canada's largest trading partner. While Canada's total exports to the U.S. from all industries came to $594 billion in 2023, its total exports to all other countries combined reached only $174 billion — meaning more than 77 per cent of all Canadian exports went to the U.S.

1. Non-oilsands oil and gas extraction

Total U.S. exports in 2023: $143 billion.

U.S. exports as share of total exports: 97 per cent.

Provincial breakdown of U.S. exports: $121.6 billion from Alberta, $11.7 billion from Saskatchewan, $6.8 billion from Newfoundland and Labrador, $6.7 billion from British Columbia.

Estimated additional cost of 25 per cent tariffs: $35.8 billion.

2. Automobile and light-duty motor vehicle manufacturing

Total U.S. exports in 2023: $53 billion.

U.S. exports as share of total exports: 96 per cent.

Provincial breakdown of U.S. exports: $52.5 billion from Ontario, $24 million from Quebec, $17 million from Alberta.

Estimated additional cost of 25 per cent tariffs: $13.3 billion.

3. Canadian petroleum refineries

Total U.S. exports: $23 billion

U.S. exports as a share of total exports: 85 per cent.

Provincial breakdown of U.S. exports: $10.1 billion from New Brunswick, $6 billion from Alberta, $3.7 billion from Quebec, $2.4 billion from Ontario.

Estimated additional cost of 25 per cent tariffs: $5.8 billion.

4. Crop and animal production

Total U.S. exports: $13.1 billion

U.S. exports as a share of total exports: 32 per cent.

Provincial breakdown of U.S. exports: $4.7 billion from Ontario, $1.9 billion from Alberta, $1.8 billion from Saskatchewan, $1.4 billion from British Columbia, $1.2 billion from Quebec, $1.2 billion from Manitoba.

Estimated additional cost of 25 per cent tariffs: $3.3 billion.

5. Aluminum production and processing

Total U.S. exports: $12.8 billion.

U.S. exports as a share of total exports: 93 per cent.

Provincial breakdown of U.S. exports: $9.8 billion from Quebec, $2 billion from Ontario, $915 million from British Columbia.

Estimated additional cost of 25 per cent tariffs: $3.2 billion.

6. Aerospace production and parts

Total U.S. exports: $12.8 billion

U.S. exports as a share of total exports: 67 per cent

Provincial breakdown of U.S. exports: $8.8 billion from Quebec, $3.2 billion from Ontario, $374 million from Manitoba.

Estimated additional cost of 25 per cent tariffs: $3.2 billion.

This report by °µÍø½ûÇø was first published Jan. 29, 2025.