BHP shares dropped 3.8% to trade at A$62.57 on Friday after the company disclosed a significant budget overrun and a sizable write-down tied to its Jansen potash development in Saskatchewan, Canada.
The miner said the Stage 2 expansion budget has increased from $4.9 billion - the amount approved at sanction in October 2023 - to US$6.9 billion. BHP attributed the uplift to higher construction hours, larger material quantities and broader cost escalation across the project.
Alongside the budget revision, the company indicated it expects to recognise an impairment charge in the range of roughly $2.0 to $2.3 billion in its fiscal 2026 results. Management said the impairment reflects the higher capital intensity now required across the entire Jansen development.
The domestic market offered little offset to the news. The S&P/ASX 200 fell by about 1.0% on the same day amid a wider risk-off tone, leaving BHP vulnerable to the negative headline on the Jansen program.
Investors reacted to three linked developments: a markedly higher project cost estimate, a two-year delay to first production at Jansen, and an impairment approaching US$2.3 billion. That mix of factors acted as a strong negative catalyst and pushed shares to an intraday low of A$62.44, noticeably below the stock’s 52-week high of A$65.98 reached just days earlier.
The market response effectively repriced the risk associated with BHP’s long-term potash expansion, reflecting the increased capital required and the shifted production timetable. The company’s disclosure quantified both the upward pressure on Stage 2 capital and the likely accounting impact to be recorded in fiscal 2026.
Key takeaways from the update include the scale of the budget increase for Stage 2, the anticipated impairment range, and the timeline slip for first production - all of which influenced BHP’s share price and filtered through to broader Australian equity performance on the day.