The IEA's Global Critical Minerals Outlook 2026 delivers an uncomfortable verdict: six years of government commitments, bilateral agreements, and multilateral forums have not reversed the structural concentration of critical mineral refining. The top three nations now control 86% of key mineral processing, copper smelter fees have hit zero, and sulphuric acid has emerged as a geopolitically exposed chokepoint. The policy investment is real. The diversification, so far, is not.
Introduction
When governments announce billions in critical minerals funding, the implicit promise is that supply chains will become less fragile over time. The IEA's Global Critical Minerals Outlook 2026, released on July 16, matters because it tests that promise directly and finds it wanting. Despite an estimated $200 billion in government commitments and 55 bilateral minerals agreements signed since 2020, the concentration of refining and processing capacity has deepened, not narrowed.
This is not a story about bad intentions. Governments across North America, Europe, and the Indo-Pacific have genuinely scaled up their ambitions. The gap is structural: the investment flowing into diversification is overwhelmingly targeting mines, while the refining and processing capacity that actually determines who controls finished materials continues to consolidate in the hands of a shrinking number of suppliers.
The findings matter to a wide audience. Automakers, battery manufacturers, defence contractors, and electricity network operators all depend on the midstream capacity that this report says is failing to diversify. Investors financing new mining projects need to understand that a successful mine does not guarantee a diversified supply chain if the refining step remains a chokepoint controlled by others. Policymakers need to understand why the money they are spending is not yet moving the needle. This report provides the clearest official account yet of why that is happening.
What the IEA Actually Found: The 86% Figure in Context
The headline finding is stark. Across six key energy minerals, namely copper, lithium, nickel, cobalt, graphite, and rare earth elements, the average market share of the top three refining nations rose to 86% in 2024, up from 82% in 2020. For the single leading refiner, the picture is even more concentrated: the average share of the top refined supplier reached 70% in 2025, up from 68% in 2020, with China leading refining for 19 of the 20 minerals the IEA analysed.
In several markets the concentration is total rather than merely dominant. For gallium, graphite, manganese, and rare earths, China accounts for over 90% of global refining supply. Excluding rare earths entirely, the average share of the top refining country rises further, to 72%. The IEA's own language is direct: supply chain concentration has increased further, particularly for refining.
The one genuine bright spot is rare earths, where new projects in the United States and production increases in Malaysia produced a modest decline in concentration between 2023 and 2025. IEA Executive Director Fatih Birol acknowledged this specifically: "There are encouraging signs of progress, including in rare earth supply chains, where we see targeted policies and investment support starting to make a difference." The exception is instructive precisely because it required sustained, targeted intervention rather than broad market incentives. It is also, so far, the exception rather than the rule.
Graphite presents perhaps the most extreme exposure of any material. Supply sources outside China are projected to cover only around 10% of 2030 demand at current trajectories. Battery cathode capacity outside dominant suppliers is planned at only around one-third of projected lithium mining capacity. Announced rare earth refining capacity outside dominant suppliers could theoretically process about two-thirds of expected mine output by 2035, but planned magnet production would cover only one-third. In each case the midstream step, not the mine, is where diversification breaks down.
Why $200 Billion Has Not Moved the Needle: The Economics of Diversification
To understand why large financial commitments have not reversed concentration, it helps to start with cost arithmetic. Capital costs for refining projects outside the dominant supplier are 20% to over 150% higher than inside China, due to equipment, construction, and land acquisition. Operating costs are on average 50% higher, driven by feedstock and energy prices. A Western nation can successfully mine lithium from its own territory and still depend entirely on Chinese processing infrastructure to convert that spodumene concentrate into battery-grade lithium hydroxide, simply because the economics of building a domestic refinery do not currently work at prevailing spot prices.
Smelter utilisation rates illustrate the divergence. Outside China, rates fell below 70% by 2025 while Chinese facilities operated at around 85%. That gap compounds over time: underutilised facilities outside China lose efficiency, skilled workers, and institutional knowledge, while Chinese facilities gain experience and scale. The IEA is explicit that if these conditions persist, many custom smelters outside China could face growing economic pressure, further increasing supply concentration in strategic midstream capacity.
Public finance commitments in advanced economies reached around $65 billion in 2025, more than four times the 2023 level. That is genuinely significant. But the IEA notes a considerable gap between commitments and actual disbursements, which will ultimately determine impact. Commitments are announcements; disbursements are money in the ground. The pipeline analysis also shows a structural imbalance: investment is concentrated in upstream mining projects, while efforts to expand refining and downstream capacity lag. For rare earth supply chains, announced refining capacity outside dominant suppliers would cover about two-thirds of expected mine output by 2035; planned magnet production covers only one-third. The pipeline for batteries shows the same pattern.
Birol framed diversification costs as an insurance premium rather than waste: "While diversified supply can come at a higher cost, this can be viewed as a mineral security premium in a time of geopolitical uncertainty, a form of economic insurance against major supply risks." That framing is useful for policymakers who need to justify above-market costs to domestic audiences. The IEA also points out that critical minerals represent only about 3% of the price of an average electric vehicle, and that tripling battery mineral prices would increase the final price of EVs and storage systems by only 5%. The cost of resilience, in other words, is much smaller than it appears when expressed in per-tonne terms.
Zero Dollars Per Tonne: What Collapsed Copper Smelter Fees Mean for By-Product Minerals
The copper market produced a number in early 2026 that would have seemed impossible a decade ago. The annual benchmark treatment charge, the fee smelters receive from miners to process copper concentrate into refined metal, settled at $0 per tonne. The previous year's benchmark was already a record low at $21.25 per tonne. The spot rate has been negative since 2024, reaching negative $126.80 per dry metric tonne by the end of June 2026.
To understand why this matters beyond the copper industry, it helps to know what smelters do with ore beyond extracting copper. Copper concentrate is not pure copper. It carries trace quantities of germanium, tellurium, indium, selenium, and precious metals that are recovered as by-products during processing. These materials are individually small in volume but critical for semiconductors, solar panels, and defence electronics. Tellurium is essential for thin-film solar cells. Germanium is used in fibre optics and night-vision equipment. Indium is a key component of touchscreens and flat-panel displays. Their supply is structurally tied to the economics of copper smelting.
When treatment charges turn negative, smelter economics deteriorate sharply. The IEA notes that smelters have become increasingly reliant on by-product sales, which are inherently more volatile, as treatment charge revenue has effectively disappeared. Chen Xuesen, vice president of the China Nonferrous Metals Industry Association, warned explicitly that zero or negative charges would "severely undermine the interest of the global copper smelting industry, including China." Chinese refined copper production still grew 7.4% year over year in the first four months of 2026 despite pledged cuts of more than 10%, suggesting that Chinese smelters are currently absorbing the pain rather than reducing output. Smelters outside China, with lower utilisation rates and fewer options for cross-subsidisation, are in a more precarious position.
Building on my analysis of collapsing smelter economics in my August piece on copper market fractures, the IEA's 2026 report confirms that the structural driver is a decade-long expansion of Chinese smelting capacity that systematically outpaced the growth of global mine supply. The zero-dollar benchmark is the mathematical endpoint of that divergence. It creates a paradox: the very midstream capacity needed to recover critical by-product minerals is under acute financial stress at precisely the moment those materials are becoming most strategically important. The IEA's risk assessment framework ranks germanium, tellurium, and gallium among the materials most exposed to supply vulnerabilities, due to high supply concentration, limited substitution potential, and critical importance across multiple end uses.
Sulphuric Acid: How a Processing Chemical Became a Geopolitical Weapon
The IEA's identification of sulphuric acid as an emerging bottleneck deserves careful attention because it illustrates a category of supply risk that is easy to overlook and extremely difficult to fix quickly. Sulphuric acid is not a finished product or an ore. It is an industrial reagent used during the pre-processing of copper, lithium, cobalt, nickel, and rare earths. Think of it as the solvent that makes ore processable: without it, the chemical reactions that separate valuable minerals from waste rock cannot proceed at industrial scale.
Global production of sulphuric acid exceeds 260 million metric tonnes annually, making it one of the highest-volume industrial chemicals on earth. Roughly 60% goes to fertiliser production; the remainder is divided between mineral processing and other industrial applications. The feedstock for most acid production is sulphur, and the Middle East supplies around one-quarter of global sulphur and approximately half of global seaborne sulphur trade passes through the Strait of Hormuz. When the Strait closed to commercial shipping in February 2026 following the escalation of the Iran conflict, the acid supply chain absorbed an immediate and severe shock.
I covered the first wave of this disruption in detail in August, examining how the Hormuz closure created a hidden processing bottleneck across critical mineral supply chains. What the IEA's 2026 report adds is official confirmation of the second shock: China indicated in April 2026 that it would halt sulphuric acid exports starting in May, removing what had been one of the last flexible supply valves for a chemical that underpins production across both mineral and fertiliser industries. China had already cut its export quota from 1.3 million tonnes in the first four months of 2025 to 700,000 tonnes in the same period of 2026. The full ban took that restriction to zero. As Jack Lifton of the Critical Minerals Institute put it in April: "The bottleneck isn't ore; it's chemicals. And China controls them."
The combined effect has been to move the effective chokepoint upstream, away from ore bodies and into processing inputs. The IEA reports that acid costs have overtaken energy costs to become the largest cost component for some mineral processing operations, a shift that has structurally altered the economics of production for lithium, copper, and rare earth processors alike. This is the mechanism by which geopolitical events translate into supply chain disruption even when no mine is directly affected.
Export Controls and the Transformation of Theoretical Risk
The IEA's most pointed language in the 2026 report concerns export controls. The report states directly: "The recent proliferation of export controls has transformed concerns around high supply concentration from a theoretical vulnerability into an immediate economic security challenge." That shift from theoretical to immediate is what makes the current moment structurally different from prior years of critical minerals concern.
China has tripled its implementation of export controls since 2023. The list of affected materials now includes antimony, bismuth, gallium, germanium, refined graphite, indium, molybdenum, rare earths, sulphuric acid, tellurium, tungsten, lithium iron phosphate batteries, and lithium refining technology. In April 2025, China introduced controls on seven heavy rare earth elements; by October 2025 those controls had been extended to internationally made products containing rare earths sourced from China or produced using Chinese technologies. The full implementation of rare earth controls could put an estimated $6.5 trillion per year of downstream production outside China at risk across automotive, high-tech, defence, and energy sectors. In 2025, those restrictions forced certain automakers to reduce or temporarily suspend production lines.
Price movements in 2025 and 2026 made the pressure visible. Copper, aluminium, and tin climbed roughly 33% between January 2025 and April 2026. Cobalt climbed approximately 130% after the Democratic Republic of the Congo restricted exports. Tungsten surged sixfold. Lithium more than doubled on strong energy storage demand. These are not marginal adjustments; they represent a fundamental repricing of supply risk. In Europe, gallium and heavy rare earth prices reached roughly five times Chinese domestic levels; germanium reached nearly three times higher. The divergence between domestic Chinese prices and prices available to buyers outside China is itself a measure of how export controls function as economic instruments.
The IEA notes that China is not the only actor deploying this tool. The DRC introduced cobalt export quotas; Zimbabwe restricted lithium exports; Mozambique imposed graphite trade restrictions. The pattern suggests that resource nationalism is spreading beyond its most prominent practitioner, potentially compounding the concentration problem even if Chinese controls were somehow resolved.
What Comes Next: The Narrowing Window for Orderly Diversification
The IEA's conclusion is not that diversification is impossible. It is that the window for orderly diversification is narrowing and the current policy mix is not calibrated to the actual problem. Governments have invested heavily in mining; they have invested far less in refining, processing technology, equipment supply chains, and the skilled workforce that midstream facilities require. The report calls for a combination of new primary supply, viable midstream capacity, secondary supply, and policy mechanisms that make diversified projects commercially investable rather than simply announced.
The IEA estimates that diversifying magnet rare earth supply chains would require around $60 billion of investment over the next decade, a figure it describes as modest relative to the potential economic cost of supply disruptions. Strategic stockpiling offers another lever: the net annual cost of stockpiling 11 high-risk materials for countries outside the dominant supplier is estimated at less than $900 million, a small insurance premium against disruptions that could affect trillions of dollars of downstream output. The IEA's largest-ever oil stock release in March 2026 during the Middle East conflict demonstrated that coordinated stockpile deployment can moderate market disruptions; the question is whether similar mechanisms can be built for materials whose markets are far less liquid and whose processing requirements are far more specialised.
In the near term, the most significant variables are the sulphuric acid shortage, the trajectory of copper smelter economics outside China, and whether rare earth diversification can be accelerated enough to serve as a genuine template for other minerals. The IEA's Ministers have asked for regular workshops to advance project development and identify policy tools to reduce investment barriers, particularly in refining and processing. That focus is the right one. The report's evidence makes clear that the diversification gap is not primarily at the mine face. It is in the chemistry, the capital, and the midstream capacity that converts raw ore into the materials the energy transition actually needs.