Transition Finance—funding for high-carbon industries undergoing genuine decarbonization—is emerging as essential beyond Green Finance alone. Thailand is developing Transition Bond criteria, and banks like UOB are assessing companies on transition plans alongside financial fundamentals. Key challenge: SMEs need cost support for measurement/verification systems (MRV) to prove credible progress, with potential backing from government and international funders. This addresses hard-to-abate sectors (cement, steel, aviation) that cannot turn green overnight but have clear reduction pathways.