The global tin supply chain is dangerously concentrated, with three countries — Indonesia, Myanmar, and the Democratic Republic of Congo — accounting for approximately 60% of global tin mine production and 60% of China's tin ore imports. Indonesia, the world's largest tin exporter, is attempting to balance production discipline with export revenue. Official export quotas have been raised to 60,000 tonnes in 2026 from 53,000 tonnes in 2025, but a simultaneous crackdown on illegal mining is creating uncertainty about actual export availability.
Myanmar's Wa State remains a critical supply wildcard. The autonomous region has historically supplied approximately 20% of global tin mine output, predominantly to Chinese smelters. A production suspension imposed by the Wa central committee has severely curtailed output, and there is no clear timeline for resumption. The Chinese smelter sector, which processes the majority of Myanmar's ore, is operating below capacity due to concentrate shortages, constraining the country's refined tin output.
The DRC's Bisie mine, operated by Alphamin Resources, is a significant source of high-grade tin concentrate. International Resources Holding (IRH) acquired a 56% stake in Alphamin in June 2025 for $367 million, but operational disruptions persist. The mine's remote location in eastern DRC exposes it to logistics and security risks. Supply from this region is unlikely to increase materially in the near term, constraining the global tin supply outlook for 2026.
Tin supply concentration creates acute vulnerability. Single-country disruptions (Myanmar reopening, DRC mine closure, Indonesian policy shift) can swing the market by 10-20% in weeks. Diversify suppliers across regions and maintain strategic buffer stocks. Monitor Wa State announcements closely.