Zambia has extended the suspension of a 10% export duty on copper concentrates until September 30, providing relief to mining companies grappling with rising stockpiles of unprocessed material amid prolonged smelter maintenance programmes and processing constraints across the country's copper sector.

The measure, first introduced in August 2025, is intended to support copper producers whose processing operations have been disrupted by technical challenges and repair work at major smelting facilities. According to a government notice cited by Reuters on June 3, the latest extension covers 271,742 tonnes of copper concentrates approved for duty-free export.

The decision highlights the balancing act facing Zambia's government as it seeks to promote domestic mineral processing while avoiding production bottlenecks that could undermine growth in one of the country's most important industries.

Zambia is Africa's second-largest copper producer after the Democratic Republic of the Congo (DRC) and ranks among the world's top 10 copper-producing nations. Copper accounts for roughly 70% of the country's export earnings and remains Zambia's largest source of foreign-exchange revenues, government income and mining-sector employment.

The government has set an ambitious target of increasing annual copper production to 3mn tonnes by 2031, more than tripling current levels as it seeks to position Zambia as a leading supplier of metals required for renewable-energy infrastructure, power grids, battery storage systems and electric vehicles.

Copper production has been recovering in recent years following a prolonged period of underinvestment and operational difficulties. Zambia produced approximately 820,000 tonnes of copper in 2024 and exported 890,346 tonnes in 2025, but remains well short of the government's long-term production target, according to the Zamba Chamber of Mines and statistics agency ZamStats.

Mopani Copper Mines, jointly owned by International Resources Holding, an Abu Dhabi-based mining investment company, and ZCCM Investments Holdings (LuSE:ZCCM-IH), Zambia's state mining investment vehicle, received the largest duty-free export allocation of 100,000 tonnes under the latest extension.

Lumwana Mining Company, a subsidiary of Barrick Mining Corporation (NYSE:B; TSX:ABX), was granted a quota of 56,986 tonnes.

First Quantum Minerals (TSX:FM), which operates the Kansanshi and Sentinel mines, secured an allocation of approximately 43,000 tonnes.

Nkana Mining and Minerals Processing, a Copperbelt-based producer, received a similar allocation.

Lubambe Copper Mine, majority-owned by JCHX Mining Management (SHA:603979), was granted a 15,000-tonne quota, while Konkola Copper Mines, controlled by Vedanta Resources, received an allocation of 12,541 tonnes.

The temporary waiver reflects wider challenges facing Zambia's copper-processing sector. Several smelting facilities have undergone maintenance and operational upgrades over the past year, reducing domestic treatment capacity and forcing miners to accumulate concentrates awaiting processing.

Without the suspension, mining companies would have faced a 10% export duty on concentrates sold abroad, significantly increasing costs and potentially discouraging production during a period when Zambia is actively seeking new mining investment.

The policy also represents a pragmatic adjustment by authorities that have traditionally prioritised local beneficiation. Zambia's mining strategy has long focused on exporting higher-value refined copper cathodes rather than concentrates, but officials have acknowledged that temporary exports are necessary while processing infrastructure is restored and expanded.

The extension comes as several major mining groups advance large-scale expansion programmes across Zambia.

Barrick Mining is progressing its Lumwana Super Pit expansion, one of the largest copper-growth projects currently under development in Africa. The project is expected to transform Lumwana into a major long-life copper producer and forms a central part of Barrick's strategy to expand copper production globally.

First Quantum continues work on the Kansanshi S3 expansion project, a development valued at approximately $1.25bn that is designed to increase processing capacity, improve recoveries and extend the life of Zambia's largest copper mine.

Mopani Copper Mines is implementing an extensive turnaround programme following investment by International Resources Holding. The strategy includes underground development, equipment modernisation and production growth initiatives aimed at restoring the mine's position as one of Zambia's leading copper operations.

Vedanta Resources is pursuing a multi-year rehabilitation programme at Konkola Copper Mines after regaining control of the asset. The company has announced plans to invest more than $1bn in mine development, processing infrastructure and operational improvements.

Collectively, these projects represent several billion dollars of planned investment and are central to Zambia's efforts to raise copper output to 3mn tonnes annually by 2031.

Analysts expect long-term demand for copper to remain robust despite near-term economic uncertainty. The metal is regarded as a critical component of the global energy transition because of its extensive use in renewable-energy systems, electricity transmission networks, electric vehicles and battery-storage technologies.

The temporary suspension of export duties is therefore expected to provide short-term operational relief while supporting Zambia's broader objective of expanding production, attracting investment and strengthening its position as one of Africa's most important copper-producing nations.