By Penny Langford
Copper’s 2026 outlook is being reshaped by a breakdown in the traditional pricing relationship between miners and smelters. Spot treatment charges have fallen below $20 per tonne in some transactions, while the annual benchmark for copper concentrate reportedly fell to zero dollars per tonne for 2026.
The move is significant because treatment charges, or TCs, are paid by miners to smelters for processing copper concentrate. When charges fall, it usually indicates that smelters are competing aggressively for scarce feedstock. Refining charges, or RCs, are also under pressure.
For copper producers, the shift can improve exposure to high metal prices. For custom smelters, it compresses margins and raises questions about utilisation, capacity discipline and future investment. For investors and policymakers, the development is an important signal that copper supply is constrained before the metal reaches the refined market.
Copper treatment charges show a concentrate bottleneck
Treatment charges are not the same as the copper price. They are a processing fee deducted from the value of concentrate delivered by a mine to a smelter.
More Read
When concentrate is plentiful, smelters can negotiate higher TCs because miners need processing capacity. When concentrate is scarce, smelters compete for material and TCs fall. In extreme conditions, charges can become negative, meaning the smelter effectively pays for access to concentrate.
According to Reuters reporting carried by Mining.com, some recent spot transactions were completed at less than $20 per tonne. The reported 2025 annual benchmark was approximately $21.25 per tonne, already one of the lowest levels in decades.
For 2026, Antofagasta agreed zero treatment and refining charges with a major Chinese smelter. That does not mean every copper concentrate shipment will trade at zero. Spot contracts, quality adjustments, freight, penalties and commercial terms will continue to vary. It does, however, establish a clear industry marker: concentrate has become sufficiently scarce to remove the traditional annual processing fee.
Copper concentrate and anodes reflect the shift in value from smelting capacity toward scarce mine supply.
Why smelters are under pressure
The immediate issue is not simply that copper demand is rising. Smelter capacity has expanded faster than the supply of readily available custom concentrate in some regions.
Wood Mackenzie describes custom concentrate as the market’s central bottleneck. Its 2026 copper analysis highlights declining ore grades, sulphuric acid constraints, shifting smelter economics and rising policy risk.
Several forces are contributing to the squeeze:
- Limited new mine supply: Large copper projects require long permitting, construction and commissioning periods. The pipeline has not kept pace with anticipated demand from electrification, power infrastructure and data centres.
- Operational disruptions: Production issues at major operations, including Grasberg in Indonesia and mines in Chile and the Democratic Republic of Congo, have reduced expected growth.
- Concentrate quality and logistics: Smelters are competing not just for tonnes, but for concentrate with acceptable impurity levels and reliable delivery schedules.
- Rapid smelter expansion: New or expanded smelting capacity increases demand for feedstock, even when mine output is not growing at the same pace.
- Policy and trade risk: Export controls, tariffs and restrictions on key inputs such as sulphuric acid are changing established flows.
The result is a market in which refined copper can appear relatively balanced while concentrate remains exceptionally tight.
Refined copper forecasts are less uniform
The 2026 copper price outlook depends on which part of the value chain is being measured.
The International Copper Study Group’s April 2026 forecast projects global copper mine production to rise by 1.6% to approximately 23.56 million tonnes. Refined production is expected to increase by only 0.4% to 28.76 million tonnes, while refined usage rises by 1.6% to 28.66 million tonnes.
That produces a projected refined surplus of approximately 96,000 tonnes. The number is small relative to the global market and does not eliminate the concentrate problem. More scrap supply, solvent extraction-electrowinning production and changes in regional inventories can support refined output even while primary concentrate remains difficult to secure.
The data also explains why analysts disagree. J.P. Morgan Global Research has pointed to elevated prices but warned that weaker economic growth and higher energy costs could weigh on consumption. Its published quarterly forecast placed copper at $13,500 per tonne in the second quarter, easing to $12,500 per tonne in the fourth quarter.
Other published forecasts are more conservative. A Reuters analyst poll cited by market reports placed the 2026 average near $11,975 per tonne, while Goldman Sachs has outlined a lower range around $10,000–$11,000 per tonne under a scenario in which demand slows and scrap supply increases.
The disagreement is not necessarily a contradiction. Copper can experience strong concentrate tightness while refined inventories rise temporarily or macroeconomic weakness limits consumption.
Mine, processing and logistics infrastructure remain central to the timing of new copper supply.
Copper price forecast: base, bull and bear cases
The following framework is a scenario analysis rather than an investment recommendation. It combines published market views with the operational implications of very low treatment charges.
| Scenario | Indicative 2026 copper range | Main conditions | Operational implication |
|---|---|---|---|
| Bear case | $10,000–$11,200/t | Global growth slows, inventories remain high, scrap responds to elevated prices and mine disruptions ease | Refined supply remains adequate despite weak concentrate economics |
| Base case | $11,500–$12,500/t | Concentrate remains tight, demand grows moderately and refined markets stay close to balance | Low TCs persist; miners retain bargaining power while smelter margins remain compressed |
| Bull case | $13,000–$15,000/t | Further mine disruptions, low inventories, stronger Chinese buying and delayed new projects | Negative or zero TCs spread; refined supply becomes vulnerable to smelter curtailments |
The base case is the most consistent with the current evidence. Zero annual benchmark charges and sub-$20 spot transactions point to a tight concentrate market, but the ICSG surplus forecast and the possibility of greater scrap availability argue against assuming an immediate refined-metal shortage.
The bull case becomes more credible if concentrate disruptions persist while visible refined inventories decline. In that situation, low TCs would no longer be only a margin signal for smelters. They could become a warning that refined production itself is at risk.
What zero TCs mean for smelter economics
A zero benchmark does not automatically make every smelter uneconomic. Smelter profitability depends on several additional factors:
- Copper and byproduct prices
- Concentrate grade and impurity penalties
- Sulphuric acid and energy costs
- Freight and port charges
- Payable metal terms
- Premiums for cathode and other refined products
- Access to captive mine supply
Integrated producers with their own mines are better insulated than independent custom smelters. A smelter with captive concentrate can protect feedstock availability, while a standalone facility must compete in the open market.
If low TCs persist, operators may respond by reducing utilisation, postponing expansions, seeking longer-term supply agreements or prioritising concentrates with favourable chemistry. Some may also place greater emphasis on recycling and secondary feedstock.
That adjustment could eventually reduce refined output growth. In other words, the market may move from a concentrate shortage to a broader refined copper constraint if smelter economics deteriorate enough.
The demand side remains crucial
Copper demand is still tied closely to construction, manufacturing, power grids, transportation and industrial equipment. Energy-transition applications add structural demand, but they do not make copper immune to economic cycles.
J.P. Morgan estimates that a prolonged rise in oil prices could reduce global growth and weaken copper consumption. China remains particularly important because it accounts for roughly 60% of global copper demand and can materially change the market balance through inventory building or destocking.
At the same time, grid investment, renewable power, electric vehicles, data centres and industrial automation continue to support long-term copper consumption. Skillings’ copper market coverage and analysis of mine output and zero smelter fees track how these forces are affecting producers and processors.
What operators and investors should monitor
The most useful indicators for the remainder of 2026 are not limited to the headline copper price.
Decision-makers should watch:
- Spot TC and RC assessments: A move deeper into negative territory would indicate continuing competition for concentrate.
- Smelter utilisation rates: Lower utilisation would suggest that processing capacity is being rationed.
- Visible exchange inventories: Rising inventories could cap prices even if concentrate remains scarce.
- Chinese treatment-charge negotiations: These provide an important signal on feedstock availability in the world’s largest smelting market.
- Mine guidance revisions: Delays at large projects or weaker grades could quickly tighten the concentrate balance.
- Scrap flows: High prices can encourage recycling and partly offset primary supply shortages.
- Sulphuric acid availability: Acid constraints can affect both leaching operations and smelter byproduct economics.
The most important distinction is between a temporary fee collapse and a structural supply deficit. If treatment charges recover while mine output improves, copper prices could moderate. If charges remain at zero or turn consistently negative while inventories fall, the market would be signalling a deeper shortage.
Bottom line
Copper treatment charges falling below $20 per tonne: and reaching a reported zero annual benchmark for 2026: marks a major change in the concentrate market. It shows that smelters are competing for feedstock at a time when new mine supply remains slow, operational disruptions are material and policy risks are affecting trade flows.
The refined market may still record a small surplus, as the ICSG expects. That limits the case for assuming an automatic price spike. But the margin for error is narrowing.
Under the base case, copper remains in the $11,500–$12,500 per tonne range, supported by tight concentrate supply and steady energy-transition demand. A sustained fall in inventories or additional mine disruptions could push prices toward the $13,000–$15,000 per tonne bull-case range. Conversely, weaker global growth and stronger scrap supply could pull prices toward the lower end of published forecasts.
For operators, the message is clear: concentrate security is becoming as important as headline copper prices. For investors and policymakers, treatment charges provide an early warning that the next constraint may emerge at the smelter gate before it appears in refined-market statistics.
LinkedIn snippet
Copper treatment charges have moved below $20 per tonne in some spot transactions, while the reported 2026 annual benchmark fell to zero. Our deep dive examines what the shift means for miners, smelters and the 2026 copper price outlook, with base, bull and bear scenarios.
X snippet
Copper’s 2026 concentrate market is under pressure: spot treatment charges have fallen below $20/t and the annual benchmark reportedly reached $0/t. We examine the implications for smelter margins, mine supply and copper prices.
Sources: International Copper Study Group; J.P. Morgan Global Research; Wood Mackenzie; Mining.com on 2026 benchmark charges; Mining.com on spot treatment charges.
