Thailand's draft Climate Change Act establishes systematic low-carbon economy mechanisms (carbon reporting, cap-and-trade, carbon tax, climate fund) that will reshape business competition. SMEs must shift mindset from regulatory compliance to competitive advantage—starting by measuring carbon emissions across supply chains, then investing in efficiency gains and green technologies. The climate fund is critical for SMEs lacking capital; early adopters will outpace laggards, but carbon reduction success depends on entire supply chain collaboration, not individual firms.