Concentration Deepens: The IEA's 2026 Outlook Confirms Critical Mineral Supply Chains Are More Vulnerable Than Ever

Introduction

Every year, the IEA's Global Critical Minerals Outlook functions as something like a check-up for the world economy's least-visible but most essential supply chains. The 2026 edition, published on July 16, delivers results that should concern anyone who makes, moves, or depends on batteries, electric motors, semiconductors, or the metals that underpin the clean energy transition. The headline finding is stark: supply chains have become more concentrated, not less, even as governments have thrown unprecedented resources at the problem.

The top three refining nations now control 86% of key mineral processing, up from 82% in 2020. China leads refining in 19 of the 20 strategic minerals the IEA tracks, with an average market share of around 70%. And the report is explicit that this is not simply a mining story. A country can dig ore from its own soil and still depend entirely on Chinese infrastructure to turn that ore into something a factory can actually use.

This matters to an unusually broad audience. It matters to automotive manufacturers trying to secure rare earth magnets for electric motors. It matters to fertilizer producers who depend on sulphuric acid. It matters to governments who have made energy security pledges they may not be able to keep. And it matters to the investors and project developers trying to decide whether building a refinery outside China is commercially viable. The IEA's answer to that last question is sobering but not hopeless, and this article walks through what the report says, why it says it, and what comes next.

What the Report Actually Found

The IEA's 2026 Outlook covers copper, lithium, nickel, cobalt, graphite, and rare earth elements in depth, with additional chapters on nuclear supply chains and what the report calls strategic minor minerals. The core finding is that concentration in both mining and refining has continued to rise despite years of deliberate policy effort. Between 2023 and 2025, the top refining countries accounted for over three-quarters of all growth in refined supply. In manganese, nickel, and graphite, virtually all supply growth came from the single dominant supplier.

China's footprint is remarkable in its breadth. It refines approximately 90% of rare earth elements, around 74% of lithium and cobalt, close to 100% of graphite, and 35% of nickel. That nickel figure climbs sharply when you count Chinese-owned operations in Indonesia. For rare earth magnets, China represents about 91% of global separation and refining, with Malaysia a distant second. IEA Chief Energy Economist Tim Gould put it plainly during a media briefing: "We have been warning for a long time of the consequences of supply concentration... refining concentration edged even higher in 2025, showing limited progress in diversifying supply chains."

The report is equally clear about why this happened. China's refining dominance is not purely a function of geology. China holds relatively modest reserves of many minerals it dominates. What it built, over decades, is the separation technology, the solvent-extraction infrastructure, and the skilled workforce that turns raw ore into usable metal. Replicating that is a decades-long project, not a policy sprint. IEA Executive Director Fatih Birol described the underlying stakes at a Council on Foreign Relations event: how to confront these vulnerabilities "is the most important emerging energy security question."

Investment trends are moving in the wrong direction at the wrong moment. Critical mineral investment declined 9% in 2025, ending several years of growth. Battery metals saw the sharpest pullback, with capital spending falling more than 20%, the largest drop in over a decade. Lithium companies cut investment by around 40%. The combination of price volatility and geopolitical uncertainty has made investors more cautious precisely when the structural need for new capacity is greatest.

Sulphuric Acid: When a Processing Chemical Becomes a Geopolitical Variable

One of the more striking sections of the 2026 Outlook is its treatment of sulphuric acid. This might sound like an industrial housekeeping detail, but the IEA frames it as a new and significant strategic bottleneck. Understanding why requires a brief detour into chemistry and geography.

Sulphuric acid is produced in enormous quantities, over 260 million tonnes annually, and it is essential for extracting copper, lithium, nickel, cobalt, and rare earths from their ores. Roughly 60% goes to fertilizer production, so when acid supply tightens, the effects ripple across both mineral supply chains and food security simultaneously. Sulphur, the key feedstock for acid production, comes largely from the Middle East. Around one-quarter of global sulphur originates there, and half of all seaborne sulphur trade passes through the Strait of Hormuz.

The Hormuz disruptions I covered in September, examining how the closure was simultaneously blocking Gulf aluminium exports and starving smelters of feedstock, created an immediate upstream squeeze on sulphur availability. China, which had already imposed a quota of 700,000 tonnes on acid exports for the first four months of 2026, down from 1.3 million tonnes in the same period the previous year, then announced in April 2026 that it would halt sulphuric acid exports entirely from May. Beijing's logic was straightforward: ING Bank's chief economist for Greater China, Lynn Song, noted that acid exports were far less important to Chinese GDP than food security, and domestic agricultural priorities took precedence.

For the rest of the world, the consequences were immediate. Acid costs overtook energy costs to become the largest cost component for some mineral processors. Copper mines producing more than a seventh of the world's primary supply found themselves exposed to a market thrown into chaos by the combination of Middle East conflict and Chinese export controls. Syed Salman Shaffi of the Gold Miners Club framed the compounding effect directly: "The Iran conflict created a shortage of raw materials. China's export halt triggers a commercial drought. These events shift the burden from Chinese smelters to copper mines in Chile, mining operations in Congo, and fertilizer blenders in India." The IEA's report validates that framing: what looked like two separate disruptions operated as a single, amplifying system.

Export Controls: From Theoretical Risk to Real Economic Disruption

The IEA's most pointed policy observation in the 2026 Outlook is that export controls have transformed supply concentration from an academic concern into an active economic security challenge. The list of affected materials is long: antimony, bismuth, gallium, germanium, refined graphite, indium, molybdenum, rare earths, sulphuric acid, tellurium, tungsten, lithium iron phosphate batteries, and lithium refining technology have all been subject to controls introduced or expanded since 2023.

The rare earth controls are the most consequential for downstream manufacturers. In April 2025, China introduced major export controls on seven heavy rare earth elements. Some automakers reduced production rates or temporarily halted operations as a result. In October 2025, those controls were expanded, with proposed restrictions on internationally-made products that contain rare earths sourced from China or produced using Chinese technologies. That expansion was suspended for one year, until November 2026, but the IEA is unambiguous that the underlying vulnerability has not been resolved. My earlier analysis of the automotive procurement window closing ahead of that November deadline remains directly relevant: the suspension bought time, not security.

The financial magnitudes here are large enough to reframe the policy debate. The IEA estimates that an estimated $6.5 trillion in annual downstream production outside China could be jeopardised if the expanded rare earth measures were enacted in full. For battery-grade graphite alone, full trade disruption would put over $300 billion per year of downstream production at risk. In Europe, prices for gallium and the heavy rare earths dysprosium and terbium are already five times higher than Chinese domestic prices, a gap that reflects the real-world cost of having to source outside the dominant supplier.

The copper smelter market tells a parallel story about how concentration compounds over time. Benchmark copper smelter fees, the charges that smelters earn for processing ore concentrate, were settled at zero dollars per tonne in 2026, the lowest level ever recorded in annual negotiations. Spot charges have been negative since 2024, reaching negative $126.80 per tonne by the end of June 2026. Since 2005, China has accounted for over 90% of growth in global copper smelting, raising its share from roughly 15% to 50% of global capacity. Smelter utilisation rates outside China fell below 70% in 2025 while remaining around 85% inside China. The IEA warns that if these conditions persist, copper could follow a pattern seen in other minerals: low prices render external production uneconomic, leading to curtailment and, ultimately, even greater concentration in the dominant supplier.

What Governments Are Doing and Where the Gaps Are

The policy response to all of this has been substantial by historical standards, and the IEA acknowledges that. Public finance commitments for critical mineral supply chain development more than quadrupled between 2023 and 2025, reaching $65 billion. Governments have signed 55 bilateral minerals agreements and created multiple new multilateral forums. The G7, at its June summit in France, endorsed a measurable target of reducing dependence on any single non-G7 supplier of rare earths and permanent magnets to below 60% by 2030, with a longer-term goal of 50%.

But the IEA's modelling suggests these efforts are not yet sufficient to change the structural picture significantly. Under current policy settings and investment trends, the average share of the top three suppliers is projected to decline only marginally over the next decade, essentially returning to roughly the concentration level seen in 2020, before rising again. The G7 targets the IEA implicitly questions as to whether they are achievable on the stated timeline.

Part of the problem is where the investment is going. Outside China, capital continues to flow primarily into mining projects. Refining, processing, and downstream manufacturing lag considerably behind. In rare earth supply chains specifically, planned refining capacity outside China is projected to meet only about two-thirds of expected mine output by 2035. Planned magnet production amounts to just one-third of what mining output would require. You can build the mine and still have nowhere viable to send the ore.

The cost barriers are real and large. Capital costs for refining projects outside established producers are 20% to over 150% higher than in leading producing countries. Operating costs run about 50% higher across cobalt sulphate, nickel sulphate, graphite, and lithium hydroxide production. The IEA's analysis does offer some encouragement on policy tools. Price-support mechanisms can raise the internal rate of return for a typical rare earth refining project outside the leading supplier by around 2.4 percentage points, at an average annual fiscal cost of around $18 million over the support period. That is a relatively modest sum relative to the economic risks of not building that capacity. Strategic stockpiling, similarly, is more affordable than it looks: the IEA estimates the net annual cost of stockpiling for eleven high-risk materials, for countries outside the dominant supplier, at less than $900 million combined.

Recycling offers another lever, though with important caveats. Scaling up recycling could reduce the need for new mining supply by between 25% and 40% by mid-century. But the IEA is careful to note that nearly 90% of cathode active material production capacity is expected to remain in China through 2030. Recycled material still has to go somewhere for processing, and if that midstream capacity remains concentrated, the security benefits of recycling are sharply limited.

The Core Argument: Mining Is Necessary But Not Sufficient

The IEA's most important contribution in the 2026 Outlook may be a conceptual one. The report is insistent that supply security cannot be reduced to bringing more mines online. A Western country could successfully mine lithium from its own territory and still depend entirely on Chinese processing infrastructure to convert spodumene concentrate into battery-grade lithium hydroxide. The ore travels to the dominant processor and re-enters the supply chain as a processed product, with all the geopolitical exposure that implies.

This argument is not new, but the 2026 report makes it with fresh urgency and more granular evidence. Concentration sits across mining, refining, processing technology, infrastructure, and increasingly recycling. Export controls and geopolitical shocks can activate any of those chokepoints with very short notice. More resilient supply chains will require new primary supply, yes, but also viable midstream capacity, secondary supply through recycling, and policy mechanisms that make diversified projects commercially investable rather than commercially charitable.

The sulphuric acid crisis of 2026 is a useful illustration of why the midstream matters so much. The problem did not originate with a shortage of copper deposits or a collapse in lithium demand. It originated with a disruption to a processing reagent that most supply chain risk assessments had not explicitly modelled. As I argued in my analysis of midstream structural vulnerabilities in September 2026, the supply chain's most exposed and least protected point is not the mine and not the factory. It is the layer in between. The IEA's 2026 Outlook provides the statistical backbone for that argument.

The report also flags a dimension of the problem that tends to get lost in the geopolitics: price volatility. Fifteen of the twenty minerals the IEA tracks have exhibited greater price volatility than oil. Cobalt metal approached $58,000 per tonne in early 2026, more than three times its level a year earlier. Lithium demand has grown around 25% per year on average over the past two years. Tungsten prices jumped sixfold. These are not orderly markets operating on predictable cycles, and building the business cases for diversified refining projects against that backdrop is genuinely difficult.

What to Watch Next

The IEA's 2026 Outlook was published in July, and the months since have only reinforced its central warnings. The sulphuric acid market has not normalised. The November 2026 deadline on expanded rare earth export controls is approaching with procurement pipelines for automotive manufacturers still far from secure. Investment in battery metals continues to contract. None of these trends are likely to reverse quickly.

On the positive side, the rare earth refining picture shows that policy can work when sustained. New projects in the United States and production increases in Malaysia reduced China's share of rare earth refining from over 90% in 2023 to 85% in 2025, with projections pointing toward 70% by 2035 if planned projects proceed on schedule. Zimbabwe commissioned Africa's first lithium refining facility in the first half of 2026. African lithium output rose 44% in 2025 alone. These are meaningful data points, even if they do not yet shift the aggregate picture.

The more durable question the IEA raises is whether the policy frameworks now being built in Washington, Brussels, Tokyo, and Canberra are designed with sufficient attention to the midstream. Building mines is politically legible and relatively fast. Building refineries is slower, more technically complex, and more expensive. The incentives and financing tools for refining projects are still far less developed than those for mining. The ANSI standards workshop I covered in September, focused on traceability and data frameworks for critical minerals, is one piece of the puzzle. Standards matter because they determine which supply chains are commercially credible and which are not. But standards alone will not close a 50% operating cost gap.

The IEA's headline number, 86% of processing in three countries, will likely move only slowly. The more consequential near-term question is whether the policy tools being deployed are targeted at the right points in the chain. The 2026 Outlook suggests they are not, yet. But it also maps out, in considerable detail, what a more effective approach would look like. Whether governments act on that map before the next disruption is the open question.