Thailand's sustainable finance market is shifting from labeling "green projects" to assessing business readiness for transition—requiring organizations to demonstrate concrete decarbonization plans, technology maturity, and climate resilience. CIMB identifies three mega-trends: (1) Transition Finance growth, with Thailand Taxonomy-aligned bonds opening ~230bn baht funding over 10 years for qualifying projects; (2) AI and Data Center expansion driving investment but triggering stricter BOI screening on energy, water, and climate risk management; (3) Capital reallocation favoring projects with proven commercial readiness (CRI index). This reshapes credit criteria and access to funding for Thai SMEs and corporates—those with robust transition plans will compete better for financing.