BHP, the world's largest mining company, is laying out an ambitious plan to dramatically expand its copper production in South Australia, with a goal of lifting output by roughly 45% to about 2 million tonnes by fiscal 2035. The plan, which RBC Capital Markets outlined in a note Wednesday, centers on the company's "Copper South Australia" hub and could involve a first-phase investment of AU$11.6 billion.
Copper is a key metal for the global energy transition, used in everything from electric vehicles to power grids. BHP's push comes as miners worldwide race to secure supply of the metal, which many analysts expect to face a structural shortage in the coming decades.
What RBC is saying
RBC, a Canadian investment bank, sees Copper South Australia as potentially the biggest single driver of BHP's production growth. The bank estimates that the first phase of the expansion could add roughly 200,000 tonnes of copper a year by fiscal 2035, bringing the hub's total output to about 500,000 tonnes annually. A later phase could push that to around 650,000 tonnes by fiscal 2040.
The price tag for phase one is substantial: RBC pegs capital expenditure at AU$11.6 billion. That's a big check, but the bank argues the project could still create value if long-term copper prices average above about AU$5.20 a pound. That's below the market's current assumption of roughly AU$6 a pound, suggesting the project could be profitable even if copper prices soften.
Despite the bullish long-term volume forecast, RBC did not change its "sector perform" rating or its AU$60 price target for BHP. The bank's fiscal 2035 output estimate of 503,000 tonnes for the South Australia hub is higher than the roughly 400,000 tonnes analysts had been expecting, but that gap didn't move the needle on the stock's valuation.
Why the market isn't jumping
That disconnect—a bigger long-term volume forecast but an unchanged price target—offers a window into how investors tend to value mining megaprojects. When most of the payoff sits a decade away and comes with a large upfront spend, today's valuation is driven less by the headline growth story and more by two things: execution and discounting.
Execution means can BHP deliver on time and on budget? Megaprojects in mining have a history of cost overruns and delays, so investors are naturally cautious. Discounting refers to the fact that future cash flows are worth less in today's dollars, especially when interest rates are high. A dollar earned in 2035 is worth significantly less than a dollar earned today, so the market tends to apply a heavy discount to long-term projections.
In that context, the 2 million-tonne ambition reads as long-term optionality—a potential upside that isn't yet priced in. Near-term share moves are more likely to hinge on signals that costs are being controlled and the project is being de-risked step by step.
What it means for investors
For everyday investors, the key takeaway is that BHP's copper expansion is a long-term story, not a near-term catalyst. The AU$11.6 billion first phase is a significant commitment, and the payoff won't materialize for years. That means the stock's performance in the near term will likely be driven by other factors, such as iron ore prices, operational performance, and broader market conditions.
Copper prices themselves have been volatile recently, with copper hitting a 2-1/2 month low amid tech sector wobbles and a weaker Chinese yuan. That volatility underscores the risk that copper prices could fall below the levels needed to make the project attractive.
Still, BHP's bet on copper reflects a broader industry trend. Other miners, like Antofagasta, are also positioning for copper demand tied to artificial intelligence and electrification, even as the market faces a potential surplus in the near term.
For investors, the lesson is to look beyond the headline growth numbers and focus on the economics of the project, the company's track record, and the timeline. A big expansion plan can be exciting, but it's the execution and the price of copper that will ultimately determine whether it pays off.
RBC's unchanged price target suggests that, at least for now, the market is taking a wait-and-see approach. That's a sensible stance for individual investors too: understand the long-term potential, but don't expect the payoff to show up in the next quarter's earnings.
