Why the Copper Concentrate Market Has Flipped in Miners’ Favour

In 2024, copper smelters paid miners US$80 to process a tonne of concentrate. In 2025, that fee dropped to US$21.25. In 2026, it hit US$0.

Those three numbers describe the steepest three-year collapse in concentrate processing terms ever recorded. They are not a pricing anomaly. They are the clearest signal yet that the copper concentrate market has flipped its balance of power: smelting capacity has been built ahead of the mine supply that feeds it, and miners of clean, high-grade product now hold commercial leverage that would have seemed implausible three years ago.

What follows here is a working model of that shift. This analysis lays out why the concentrate market moved, what grade and cleanliness actually mean for the value a miner realises in a negative-charge environment, and how to assess a developing project’s positioning against that structural backdrop, using the Minto project in Yukon as the concrete case that anchors the abstract.

The steepest three-year collapse in concentrate processing terms on record

Treatment and refining charges (TC/RCs) are the fees a smelter deducts from a miner in exchange for turning concentrate into refined metal. For most of the past decade they were a stable cost of doing business. Between 2016 and 2023, the benchmark treatment charge averaged US$78 per dry metric tonne. That was the normal.

Then the floor gave way, one settlement at a time. The 2024 benchmark landed at US$80/t, still in line with history. The 2025 benchmark, negotiated between Antofagasta and Chinese smelters, dropped to US$21.25/t, a fall of more than 73% in a single year. In December 2025, Antofagasta and a Chinese smelter agreed terms of US$0/t for 2026, confirmed as the formal benchmark in January 2026 and the lowest annual settlement ever recorded.

The spot market moved even faster than the annual contracts. Fastmarkets’ copper concentrate treatment charge index, on a cif Asia Pacific basis, slipped from roughly US$89/t in August 2023 into negative territory by April 2024, and it has stayed below zero ever since. By March 2026, Fastmarkets corrected its assessment to minus US$90.50/t, with the implied traders’ purchase charge at minus US$116.60/t.

Fastmarkets, 17 April 2026: copper concentrates TC index, cif Asia Pacific, assessed at minus US$105.10/t.

A negative charge means the smelter is effectively paying the miner to hand over concentrate, rather than the other way around. That is the inversion. The single number that captures how far things have moved is the three-year average: annual benchmarks from 2024 to 2026 averaged US$33.8/t, a 57% decline from the prior eight-year average of US$78/t.

The spot market’s move into negative territory is the more precise signal: negative treatment charges mean the smelter pays the miner for concentrate, a structural inversion that annual benchmark numbers alone understate.

That average tells you this is not a one-year dislocation waiting to correct. It is a sustained regime change in who captures value from processing concentrate. For investors used to thinking about copper through the refined-metal price, the lesson is to recalibrate toward the concentrate stage, because that is where the margin has already migrated in settled data.

What is driving the imbalance, and how long does it last?

The mechanism behind the collapse is not complicated to state. Smelter capacity, particularly in China, has been added faster than mines can supply concentrate to feed it. With too many furnaces chasing too little material, smelters compete for available feed by accepting ever-lower processing fees, and eventually zero or negative ones, simply to keep throughput up.

The International Energy Agency (IEA) attributed the charge collapse to exactly this dynamic in its July 2026 commentary. S&P Global, citing Nornickel’s outlook, described concentrate as “the tightest segment of the copper value chain,” with the 2026 benchmark cut to zero as smelting capacity continues competing for scarce supply. Analysis from Columbia SIPA framed acceptance of zero charges as smelters’ willingness to run on uneconomic terms purely to defend volume and market position.

Columbia SIPA’s analysis of copper smelting capacity frames smelters’ acceptance of zero or negative charges as a rational, if uneconomic, defence of volume and market position against a backdrop where furnace capacity has simply outpaced available concentrate supply.

Demand sits behind all of this. Analysts consistently point to several structural drivers pulling on copper at once:

• Electric vehicles
• Power grid expansion
• Data-centre build-out
• Renewable energy deployment

BMI research forecasts EV-related copper demand alone rising from 1.2 million tonnes in 2025 to 2.2 million tonnes by 2030. That demand trajectory is one reason some analysts see copper prices, which reached an all-time high of just over US$11,000/t on the LME in May 2024, potentially pushing beyond US$12,000/t before the end of the decade.

The case for a faster supply recovery

The counter-argument deserves a fair hearing, because it is not without merit. A pipeline of projects and expansions across Chile, Peru, the Democratic Republic of Congo and Indonesia, combined with debottlenecking, productivity gains and mine-life extensions, could materially expand concentrate supply from the mid-to-late 2020s. High copper prices themselves spur investment, and technological advances in automation, ore-sorting and metallurgy may lift effective supply sooner than the pessimists assume.

If that view holds, benchmark charges recover from zero and bargaining power rebalances back toward smelters within a few years.

Where the structural case earns more weight is timing. New copper mines typically take 7 to 10 years from early resource delineation to commercial production, thanks to permitting, capital intensity and technical complexity. That lead time is the single constraint worth internalising: current tightness cannot be resolved quickly even at prices that would normally unlock major investment, because the pipeline simply cannot respond fast. The consensus across recent commentary reflects this, leaning toward multi-year tightness that eases gradually rather than a quick return to surplus.

The structural copper supply gap sits behind the demand-side pressure described here: a combination of project lead times, capital constraints and permitting timelines that prevents the mine pipeline from responding quickly to price signals even when incentive economics are favourable.

That distinction matters for one practical reason. A cyclical squeeze resolves in months and offers producers a fleeting advantage; a structural one resets concentrate economics for years, setting the duration over which high-grade producers can expect favourable terms.

Why 38% copper concentrate commands a different commercial conversation

This is where market mechanics become project economics. In a negative-charge environment, the value a miner captures depends heavily on how much copper each tonne of concentrate contains.

Consider the maths. At the April 2026 spot charge of minus US$105.10/t and typical concentrate grades of 25-30% copper, a miner receives roughly US$350-420 per tonne of contained copper back from the smelter before processing even begins. Grade directly amplifies that figure. The richer the concentrate, the more contained metal each negative-charge tonne carries, and the more value flows back to the producer.

Smelters are not simply chasing volume, either. They face operational and regulatory limits on impurities such as arsenic, antimony, bismuth and fluorine, which constrain how they blend feed. Clean, high-grade concentrate lets a smelter increase throughput without breaching environmental limits, and it cuts reagent, energy and maintenance costs. That is why clean feed commands preferential access and terms even in a market where smelters are already competing.

Offtake agreements are the commercial instrument through which those smelter-side preferences are formalised: term lengths, pricing formulas and exclusivity clauses all shift meaningfully when the smelter, not the miner, is the party competing for access to clean, high-grade feed.

Colin Joudrie, Chief Executive Officer: 38% copper concentrate is rare in the current market.

Commercial advisor Calgacus assessed the Minto product as among a limited number of high-grade concentrates likely to reach the market before 2030. Scarcity of clean, high-grade material at scale is precisely what lets a producer negotiate from strength rather than desperation.

The commercial advantages of high-grade, low-penalty concentrate stack up in a clear order:

1. Higher payable copper and precious metals per tonne
2. Fewer penalty deductions for impurities
3. Stronger realised netback relative to benchmark
4. Preferential access to tier-one smelters competing for clean feed

There is a caveat worth holding onto. Premiums for high-grade concentrate are cyclical; if new clean-concentrate projects come online or smelter growth slows, those premiums narrow, and contract re-sets or logistics costs can erode theoretical advantages. A well-positioned project must remain robust under more normal market conditions, not just today’s.

The read for you is direct. In a negative-charge market, grade is not merely a quality metric. It is a commercial multiplier, and it separates investors who see concentrate as an undifferentiated commodity from those who understand why specific product specifications are becoming strategic in smelter procurement.

How Minto’s resource expansion positions a brownfield project for a structural market

Abstract analysis needs a concrete test, and the Minto project in Yukon, Canada, provides one. Its 2026 Mineral Resource Estimate (MRE), a formal statement of contained metal classified by confidence level, shows the scale of the resource in numbers.

The Measured and Indicated (M&I) resource stands at 47.8 million tonnes grading 0.89% copper, 0.34 g/t gold and 3.2 g/t silver, with an additional 16.9 million tonnes inferred. Contained M&I metal comes to approximately 940 million pounds of copper, 530,000 ounces of gold and 4.97 million ounces of silver. Against the 2025 estimate, that represents year-on-year growth of 182% in copper, 184% in gold and 188% in silver.

The strategically interesting number is the gap between resource and plan. The current PEA (Preliminary Economic Assessment) mine plan draws on roughly 18.4 million tonnes of mineable inventory from that 47.8 million tonne M&I resource, leaving a large amount of defined resource sitting outside the plan, plus the inferred material on top.

Then there is the infrastructure. Minto is a brownfield site, meaning it carries existing mill, camp and underground infrastructure from prior operations. That distinguishes it from greenfield developments in ways that matter commercially: lower initial capital, a shorter path to production, and established community and permitting relationships. The recurring failure mode for brownfield restarts, illustrated by cautionary cases such as Pumpkin Hollow, is underestimating the condition of legacy assets and rehabilitation costs, so that caveat belongs on the ledger too.

The brownfield restart thesis for Minto rests on a specific asset acquisition structure: existing plant and infrastructure acquired at a fraction of replacement cost, with that capital advantage becoming most tangible when compared against the full construction timelines facing greenfield copper projects targeting the same late-2020s supply window.

Phase 2 drilling and the path to a Feasibility Study

Phase 1 drilling totalled 52,288 metres and completed in April 2026, underpinning the current resource. Phase 2 spans approximately 50,000 metres and, as of late September 2026, was running roughly two months ahead of schedule, with assay results received for around 5,000-7,000 metres.

Phase 2 targets two things: upgrading existing material to the Measured category, the highest confidence classification, and extending known mineralised zones. Those results feed directly into a revised MRE expected in Q1 2027, followed by a Feasibility Study targeted for mid-2027, led by VP Engineering Scott Fulton with direct contractor input.

CEO Colin Joudrie has framed resource expansion as upside rather than a prerequisite, expressing comfort that the feasibility mine plan retains its 18.4 million tonne baseline. That framing keeps the case grounded: the drilling is upside to a plan that is already viable in the structural environment described above.

For an investor comparing Minto against other developing copper projects, the insight is that existing infrastructure plus a large resource outside the current mine plan means the Feasibility Study baseline is already de-risked in ways greenfield projects cannot match. The resource growth is the mechanism converting a structural market opportunity, tight concentrate supply meeting scarce high-grade product, into a defined and financeable asset ahead of the late-2020s supply gap.

What the structural shift means for investors assessing concentrate-stage copper exposure

Pull the three threads together and a framework emerges. The charge regime has changed, grade and cleanliness now act as commercial multipliers, and brownfield timelines offer a genuine head start. Those combine into a set of criteria for evaluating any developing concentrate project:

• Resource scale relative to the current mine plan
• Concentrate grade and cleanliness, including impurity profile
• Infrastructure and brownfield status
• Timeline to Feasibility Study and production
• Project economics under normalised, not just current, market conditions

The variables that could shift the picture are worth watching honestly. The timing and scale of new mine supply, the pace of Chinese smelter capacity growth, any macro moderation in demand, and regulatory changes to impurity standards could all move the balance.

Analyst consensus points to multi-year concentrate tightness easing gradually rather than reversing quickly, with copper prices potentially exceeding US$12,000/t before the end of the decade.

The structural backdrop remains the late-2020s supply-demand gap, framed by BMI’s forecast of 2.2 million tonnes of EV-related copper demand by 2030 against a supply pipeline where most new production requires 7 to 10 years to reach market and much is not expected before 2030.

The read you should take is this. The concentrate shortage creates a window of commercial advantage for projects that can actually deliver high-grade feed before that gap narrows. The question worth asking about any such project is not whether the market is favourable, but whether the project can reach production before the window closes. For Minto specifically, the Feasibility Study due mid-2027 is the next material valuation catalyst, the document that will test whether resource scale, product quality and infrastructure translate into bankable economics.

This article is for informational purposes only and should not be considered financial advice. Investors should conduct their own research and consult with financial professionals before making investment decisions. Past performance does not guarantee future results, and financial projections are subject to market conditions and various risk factors. Forward-looking statements are speculative and subject to change based on market developments and project performance.

A structural window, not a permanent condition

The central finding holds across three years of settled data: the collapse in treatment charges is a durable structural signal, not a short-term anomaly. It has already redistributed commercial leverage toward miners of high-grade, clean concentrate, and that redistribution is visible in benchmark terms that moved from US$80/t to US$0/t in three settlements.

What remains unconfirmed matters just as much. The Feasibility Study will determine whether Minto’s resource scale, product quality and infrastructure position translate into bankable economics, and the wider supply pipeline could ease concentrate tightness faster than current consensus assumes.

The practical take-away for investors is straightforward. The structural window is open now, but it rewards projects with demonstrated resource depth, near-term production potential and product quality that smelters will actively compete for. It does not reward projects that depend on favourable market conditions to make the numbers work.