Copper Treatment Charges Highlight Supply Shortages

By the Editorial Team · Saturday, October 17, 2026

Treatment charges for copper concentrate have turned negative, with miners like Chile’s Antofagasta and Canada’s Teck Resources being paid to supply concentrate amid severe global supply shortages. This reversal, driven by mine shutdowns and operational disruptions, signals major shifts in copper market economics as contract talks for 2027 proceed under tightening supply conditions.

Copper treatment charges have turned negative in recent tenders, reflecting severe supply constraints in the global copper market as contract negotiations for 2027 get underway. According to multiple sources familiar with the transactions, Chile’s Antofagasta secured treatment charges exceeding $300 per metric ton to have its copper concentrate converted into refined metal, a record result for the company. This unusual situation reflects broader disruption and tightening in copper supply chains.

Typically, miners pay smelters and refiners a fee to process their copper concentrate into refined metal, offset against the value of the copper content. However, since early 2025, treatment charges have reversed into negative territory. This means smelters, often dependent on concentrates from miners—especially in China—are effectively paying miners to secure sufficient feedstock to keep their processing facilities operating.

One source detailed that in a recent tender, Antofagasta agreed to a negative treatment charge of $310 per ton on a shipment of 10,000 tons of concentrate from its Centinela mine, scheduled for November delivery. In a separate tender, the company sold 40,000 tons of concentrate from its Los Pelambres mine at negative charges around $330 per ton for deliveries spread throughout next year.

Canada’s Teck Resources also reportedly sold copper concentrate from its Highland Valley mine under similar conditions, with treatment charges in the negative $370s per ton range as of a few weeks ago.

The tightening market stems from a series of disruptions that have constrained concentrate availability. Notably, First Quantum’s Cobre Panama mine was shut down in late 2023, reducing global supply. More recently, a landslide at Codelco’s El Teniente mine in Chile resulted in two fatalities and forced operational restrictions, exacerbating the supply shortfall.

These events have significantly altered the economics of copper concentrate processing, reversing longstanding payment practices and highlighting the industry's ongoing challenges amid rising demand and strained supply chains. Industry analysts will watch forthcoming contract negotiations closely as they navigate these unprecedented market dynamics.

This article was reported by synthesizing coverage from multiple independent news outlets to present a balanced, unbiased account. Read about our editorial standards. Spotted an error? Let us know.