Canada's mining tax rates already beat global rivals, think tank argues against new subsidies
C.D. Howe Institute report finds British Columbia copper taxed at 7.6 per cent—less than Chile (26.7%) and Australia (21.4%)—despite disappointing investment decade.
Sources · C.D. Howe Institute
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Canada's mining tax system is already internationally competitive on capital investment but fails to attract productive new projects, according to a new analysis by economists Jack Mintz and Philip Bazel at the C.D. Howe Institute's School of Public Policy at the University of Calgary.
The researchers measured effective tax rates on new mining investment across provinces for critical minerals—copper, lithium, nickel, zinc—and non-critical minerals including iron ore and gold. They found Canada's rates consistently undercut global competitors.
British Columbia's effective tax rate on copper is 7.6 per cent, compared to 26.7 per cent in Chile, 21.4 per cent in New South Wales Australia, and 19.8 per cent in Peru. Ontario's iron-ore rate is 9.4 per cent versus 21.5 per cent in Western Australia and 17.1 per cent in Brazil. Across provinces, the average effective tax rate for critical minerals is 10.2 per cent and for non-critical minerals 13.3 per cent.
Quebec stands out with higher rates—19.2 per cent for critical minerals and 14.6 per cent for non-critical—due to its progressive mining profit tax that tops out at 28 per cent. Ontario's lower rates reflect low mining profit taxes and concessionary corporate taxation.
Canada's competitiveness stems from tax preferences: exploration and development costs are deductible before a new mine earns income, costs get fast write-offs, and investment tax credits exist for exploration both federally and in British Columbia.
Despite this tax advantage, mining investment in Canada has disappointed over the past decade. The real barrier is regulation, not taxation. A mineral discovery takes 20 years to reach production in Canada versus 14 years in Australia, where regulatory systems move faster. Mintz argues that legislative reform would be better than government picking and fast-tracking winners. Yet federal and provincial governments are going overboard on unneeded tax preferences and subsidies to spur mining investment—a strategy the report questions as unnecessary given existing competitiveness and poorly designed, since the current system heavily favours development and exploration, especially for critical minerals.
What specific changes to mining taxation do Mintz and Bazel recommend to improve productivity?
Have federal or provincial governments responded to this review with their own mining tax reforms?
We'll update this story as answers emerge.
By the numbers
What is British Columbia's effective tax rate on copper compared to Chile and Australia?
British Columbia taxes new copper investment at 7.6 per cent, substantially lower than Chile's 26.7 per cent and New South Wales Australia's 21.4 per cent.
What are Canada's average effective tax rates for critical versus non-critical minerals?
Across Canadian provinces, the average effective tax rate for critical minerals is 10.2 per cent and for non-critical minerals 13.3 per cent.
Why does Quebec have higher mining tax rates than other provinces?
Quebec's higher rates of 19.2 per cent for critical minerals and 14.6 per cent for non-critical minerals result from its progressive mining profit tax that reaches a top rate of 28 per cent.
How much longer does mineral development take in Canada than in Australia?
A mineral discovery takes 20 years to reach production in Canada compared to 14 years in Australia, with the difference attributed to slower regulatory systems.
