Lithium Triangle Holds 43% of Global Resources but May Face Output Gap by 2028

Resource dominance meets a supply warning

The Lithium Triangle, spanning Argentina, Chile and Bolivia, holds 43% of the world's lithium resources, according to EBC Financial Group. Yet the same analysis warns that the region could expose an output gap by 2028, underscoring a growing distinction between resources in the ground and metal delivered to market.

For importers and battery manufacturers, the figure is a reminder that geological wealth sits heavily in one part of South America. For the same buyers, the 2028 warning is the more actionable signal: concentration of resources does not guarantee concentration of supply.

Why resources and output diverge

EBC Financial Group frames 2028 as the point at which the gap between the Lithium Triangle's resource base and its actual production could become visible. The core issue is that resources — lithium identified in brine deposits and salt flats — are a measure of what exists, not what is being extracted, processed and shipped in any given year.

Bringing new lithium capacity online involves long lead times, and the three countries sit at different stages of development. That mismatch between a 43% resource share and the volumes reaching global markets is what EBC flags as the risk heading toward the end of the decade.

What it means for trade flows

• Buyers dependent on South American lithium face timing risk: resource share does not fix the delivery schedule.
• A shortfall from the region would tighten global availability, given how much of the resource base is concentrated there.
• Diversification of supply and offtake planning become more important the closer the market moves to 2028.

The outlook to 2028

EBC Financial Group's assessment positions the Lithium Triangle as both the anchor of long-term lithium supply and a potential source of near-term tightness. The 43% resource figure defines its strategic weight; the 2028 warning defines the timeline over which that weight must be converted into production.

For exporters in Argentina, Chile and Bolivia, the message is that the window to expand output is finite. For importers, market analysts and battery supply chains, the same window frames when sourcing decisions need to be made. The gap EBC describes is not a shortage of lithium in the ground — it is a question of whether that lithium moves fast enough to meet demand as 2028 approaches.