A recent survey by The Globe and Mail has quantified a risk that often lurks in the fine print of municipal procurement documents: the impact of tariffs on infrastructure projects. The findings reveal that Canadian cities are bracing for significant cost increases, with Calgary estimating potential added expenses ranging from C$315 million to C$466 million over the lifetime of its current contracts. Brampton, meanwhile, has pegged its potential capital exposure at C$100 million to C$150 million.
While The Globe and Mail itself is privately held by Woodbridge, the Thomson family's investment vehicle, the implications for investors are clear. These tariff-related costs could influence municipal borrowing needs, the timing of public works, and the profit margins of listed engineering and construction firms, especially if imported material costs rise faster than contract prices can adjust.
Calgary's Exposure in Context
Calgary's estimate is based on C$5.3 billion worth of active procurement contracts. The low and high scenarios represent roughly 5.9% and 8.8% of that total value, respectively. These percentages provide a sense of scale but should not be interpreted as a forecast of losses or an immediate cash outlay. The city's own tariff-response page notes that only 5% of its contracts are directly with U.S. suppliers or denominated in U.S. dollars, calling its direct exposure "relatively low." Officials are reviewing major projects on a case-by-case basis, seeking non-U.S. sources for steel and aluminum, purchasing materials earlier, and exploring alternative shipping routes.
However, the indirect exposure may be more significant than the nationality of the prime contractor suggests. A Canadian contractor might still rely on machinery, electronics, rail equipment, or metal products that contain U.S. inputs. Even if the city's invoice never comes directly from an American company, a local supplier can pass on those cost increases. This second-order effect is plausible given the breadth of Canada's retaliatory tariffs, which took effect on September 8 and cover C$27.6 billion of U.S. imports, including steel, aluminum, appliances, agricultural equipment, electronics, and some rail equipment, according to the Department of Finance.
Contract Structure is Key
For investors in construction and engineering firms, the critical question is who bears the risk of price escalation. Under cost-reimbursable or collaborative contracts, much of the increase can be passed back to the public owner. In contrast, fixed-price contracts with weak escalation protection can leave contractors absorbing higher materials and logistics costs. Project delays, even if tariffs are eventually recoverable, can also erode margins.
Aecon Group, a Toronto-based contractor listed on the TSX, serves as a useful reference point, though its exposure to Calgary's specific estimates is not proven. In its second-quarter update, Aecon noted that announced or threatened tariffs could raise purchased-material costs, reduce availability, and delay private projects. The company has emphasized its shift toward collaborative and other lower-risk contract models after losses on legacy fixed-price work. With backlog exceeding C$10 billion, Aecon's contract mix is more important than treating every new infrastructure dollar as equivalent revenue.
Brampton's Response
Brampton's approach highlights the other side of the trade. Its September 10 resilience plan calls for stronger Canadian-first procurement, reviews of exit and termination clauses, and replacement of U.S. vendors where feasible. While this could benefit domestic suppliers, switching vendors can also raise near-term costs or slow delivery as cities qualify new suppliers.
Why the Upper Estimate Could Be Too High
The strongest counterargument is that Calgary's range is scenario modelling before mitigation. It spans the remaining life of contracts, not a single budget year, and it does not assume that every tariffed input will continue to come from the United States. Supplier substitution, federal remission, negotiated change orders, and a future trade settlement could all reduce the realized amount.
Investors should therefore watch for two harder data points: revised project budgets from the cities and disclosure from contractors about tariff recoveries versus costs absorbed. Until those appear, the upper estimate is best treated as a stress case for procurement and contract design, not as C$466 million of guaranteed spending or losses.
