Southeast Asia’s Green Economy Hits US$290 Billion but Faces Major Deployment Gap

Kuala Lumpur, — Southeast Asia’s green economy has grown significantly to US$290 billion this year, yet the region is struggling with a substantial realisation gap, as more than 35% of announced green investments have yet to materialise, according to a new report.

The “Southeast Asia’s Green Economy Report 2026: The New Calculus,” jointly released by Bain & Company and Standard Chartered, highlights a critical shift in how green capital is being allocated across the region. Investors are no longer driven solely by climate goals. Instead, energy security, economic growth, and actual project delivery have become equally important factors.

“The transition is sorting leaders and laggards in ways that climate ambition alone can no longer bridge,” said Dale Hardcastle, a partner at Bain & Company. “Capital is flowing where commercial demand, energy security, and policy that delivers infrastructure come together.”

The report warns that Southeast Asia has a narrow 24-to-36-month window to close this gap. An additional US$80 billion in green capital expenditure (Capex) is at stake, particularly in the power sector and electric vehicle (EV) value chains.

Key Findings:

• Out of US$540 billion in green Capex announced for power and EV sectors until 2030, only about US$315 billion is currently on track for deployment.
• Grid infrastructure remains a major bottleneck. Investment in transmission and distribution has actually declined by 3% over the past decade, even as energy demand grows by around 5% annually.
• New demand from data centres, EVs, and green industrial clusters could add over 100 terawatt-hours of electricity demand in the next three to four years — potentially unlocking more than US$200 billion in new investments.
• While four Southeast Asian countries now rank among the world’s top 15 EV markets, the region still captures very little of the high-value parts of the supply chain. Around 70% of four-wheel EV value flows outside the region, and Southeast Asia accounts for less than 2% of global EV and battery production.

The report cautions that decisions made between 2026 and 2028 will determine whether the region becomes a major player in the green value chain or remains primarily a consumer and low-margin assembler.

Mushahid Syed, interim CEO of Standard Chartered Malaysia, emphasised the urgency: “The opportunity for Southeast Asia’s green economy is substantial, but capturing it requires synchronising policy, infrastructure, and finance at speed.”

Closing the current deployment gap could deliver a 25% uplift on baseline projections, adding that crucial US$80 billion by 2030.

This new pragmatic approach — balancing ambition with deliverability — marks a significant evolution in how Southeast Asia approaches its green transition. Success will depend on faster grid development, clearer policies, and stronger alignment between public and private sectors.