BHP has updated the investment profile for its Jansen potash project in Saskatchewan, Canada, increasing estimated costs and extending the development timeline, underscoring growing pressure on large-scale strategic mining projects to meet capital return thresholds.
Rising capital estimate and revised timeline for Stage 2
The company raised the estimated capital cost for Jansen Stage 2 to US$6.9 billion, compared with the US$4.9 billion approved in October 2023. First production is now expected in late FY2031. BHP also expects to record an impairment of approximately US$2.3 billion on the broader Jansen asset base as part of its FY2026 reporting cycle. Despite the revisions, the project remains under construction, with Stage 2 reported as 16% complete and engineering work 83% complete.
Production profile and global potash significance
Once fully ramped up, Jansen Stage 2 is expected to produce around 4.36 million tonnes per year of potash, contributing to a combined Jansen output of approximately 8.5 million tonnes per year.
This would represent about 10% of global potash supply, positioning the asset as one of the largest fertiliser developments globally. Potash provides BHP with exposure to fertilizer demand and food security-linked commodities, expanding its portfolio beyond iron ore and copper. The Canadian location also aligns with demand for lower geopolitical-risk supply chains.
Financial returns and investment recalibration
BHP has revised the project’s expected internal rate of return to 11% at consensus prices, with an estimated eight-year payback period.
Reuters reported that the updated cost and schedule reflect delays following earlier acceleration decisions tied to fertilizer supply concerns arising from the Russia-Ukraine conflict. The latest cost increase has been attributed to inflation, design changes, lower productivity, and higher labour and materials costs. The company continues to forecast group capital expenditure of approximately US$11 billion in 2027.
Market reaction and megaproject inflation concerns
The revision has renewed investor concerns about inflationary pressures across large mining developments. Copper, lithium, potash, rare earths, and nickel projects are all exposed to rising capital intensity and execution risk, even where long-term demand fundamentals remain strong.
The update has also reinforced scrutiny of management execution and capital allocation discipline, particularly for long-life, capital-intensive assets.
Strategic value versus capital discipline
The Jansen project remains strategically significant, providing exposure to global fertilizer demand and long-term potash supply growth. However, the financial framework has tightened as higher costs and extended timelines reduce flexibility.
The project illustrates the broader industry tension between strategic resource development and shareholder return expectations, with capital discipline increasingly central to valuation outcomes in large-scale mining investments.
