BHP Potash Project Cost Hike
BHP's Jansen Stage 2 Potash Project Faces Billion-Dollar Cost Increase and Production Delay
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Key Points
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BHP said Jansen Stage 2’s economics are supported by “consensus prices” averaging about US$330 per tonne over financial 2031 to 2041, under which it expects an internal rate of return (IRR) of 11% and an eight-year payback period.
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BHP clarified that its operational expenditure estimate for Jansen Stage 2 “excludes carbon tax, royalties, and sustaining capital,” while also leaving unchanged a unit-cost estimate of about US$105–US$120 per tonne (separate from the higher US$114–US$130/t range after ramp-up cited for the whole Jansen operation).
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In describing what the increased funding will cover, BHP outlined specific additions including development of new mining districts, second shaft hoist infrastructure, expanded processing facilities, and additional rail cars to handle higher volumes.
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BHP also said future expansions could eventually lift the Jansen site’s capacity to between 16 million and 17 million tonnes a year, beyond the current expectation of 8.5 million tonnes from Stages 1 and 2 once ramped up.
BHP Group will take a $2.3 billion impairment charge on its Jansen potash project in Saskatchewan, Canada, after revealing the Stage 2 expansion will cost $6.9 billion — up 41% from the $4.9 billion approved just three years ago Financial Post. The company pushed back first production for Stage 2 to late fiscal 2031, two years later than originally planned.
Despite the hit, BHP insisted Jansen remains a "generational asset" and still expects the mine to deliver EBITDA margins above 65% and unit costs of $114 to $130 per tonne once fully running Leader Post.
A $2 Billion Cost Blowout in Three Years
BHP approved Stage 2 in November 2023 at a budget of $4.9 billion, targeting first production in 2029. By June 2026, that budget had jumped $2 billion to $6.9 billion Financial Post. The company blamed more construction hours, extra materials, and general cost escalation across the industry.
The added spending covers specific new work: new mining districts, a second shaft hoist, expanded processing facilities, and more rail cars to move higher volumes Bitget. Stage 2 is about 16% complete, though engineering is 83% done. The $2.3 billion impairment charge reflects the gap between what BHP paid and what the asset is now worth under revised assumptions.
Thin Returns Hinge on $330 Potash Price Holding
BHP says Stage 2 will deliver an internal rate of return (IRR) of 11% — the profit rate on its investment — with an eight-year payback period. That assumes a "consensus" potash price averaging $330 per tonne from 2031 to 2041 Leader Post. Skeptics note that 11% is a narrow margin. If prices fall below $330, the numbers get tight fast.
BHP's unit operating cost estimate for Stage 2 sits at $105 to $120 per tonne, excluding carbon tax, royalties, and sustaining capital. Combined Stages 1 and 2 are expected to produce 8.5 million tonnes per year, supplying roughly 10% of global potash demand Morningstar.
Stage 1 Still on Track, Bigger Vision Intact
Stage 1 remains on schedule for first production in mid-2027 at about 4.15 million tonnes per year. Stage 2 will add roughly 4.4 million tonnes annually LF Press. Together, BHP says the two stages make Jansen the lowest unit-cost potash mine in Canada once fully ramped up.
BHP also flagged that Jansen could eventually expand well beyond its current targets. Future stages could lift total site capacity to between 16 million and 17 million tonnes per year Bitget — potentially making it the largest potash operation in the world and a major force in reshaping global supply.
Geopolitical Tailwinds Push BHP to Stay the Course
Russia's 2022 invasion of Ukraine — and Western sanctions on Belarus — removed roughly 35% to 40% of traditional potash supply from global markets. That supply shock accelerated BHP's decision to fast-track Stage 2 in late 2023. BHP is not part of Canpotex, the Canadian potash marketing cartel, giving it freedom to sell independently and compete on price Financial Post.
BHP CEO Mike Henry called Jansen "a generational asset" and said the company's "commitment to Saskatchewan is unwavering." BHP shares fell 2.4% in Sydney trading after the announcement Leader Post. Investors have seen this story before — mega-project costs that keep climbing — and the market's patience is being tested.
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