BANGKOK, THAILAND – Thailand’s first Climate Change Act set out sweeping new rules on carbon pricing, reporting and climate finance that could reshape the country’s economy.
Historic law set foundation for net-zero shift
Thailand presented its first Climate Change Act, a law that brought all national climate measures together under one framework and pushed business, public authorities and the financial sector into a new system of transparency and climate accountability. Observers described the legislation as a turning point in the country’s climate policy. With a cabinet decision on 2 December 2025, the government laid the groundwork for a net‑zero future using far‑reaching tools that could alter existing economic structures.
New climate power centres and oversight bodies
The law created four national bodies, marking a major shift in political responsibility for climate action. The National Climate Policy Committee was tasked with key decisions and with shaping Thailand’s international climate stance, while two fund committees and the Greenhouse Gas Management Organisation were set up to steer all emissions mechanisms in the country. A government insider summed up the scale of the reform, stating:
“We are creating the architecture for a completely new economic system.”
said a government insider, whose role was not officially disclosed.
Climate fund to channel carbon revenues
Through the new Climate Fund, Thailand established a state climate finance instrument to collect revenues from CO₂ taxes, fees and emissions trading. Money from the fund was intended to flow into renewable energy, adaptation programmes and emission‑reduction projects. The fund was set up as an independent legal entity with powers to invest, provide support and regulate, prompting critics to ask whether companies would be required to shoulder the costs of the green transition, while supporters saw a historic opportunity to modernise the economy.
Strict data duties and national emissions register
The law required a national greenhouse‑gas register that would record all emissions and sinks across the country. Public authorities and companies had to provide precise reports, with incorrect information punishable by fines of up to 300,000 baht plus additional daily penalties. This created a climate database of unprecedented accuracy and gave the government a tool to reveal the progress or delay of each sector of the economy.
ETS, CO₂ tax and CBAM-style costs for imports
Under the law, three major instruments were introduced: an emissions trading system allowing companies to hold, trade and transfer CO₂ certificates; a CO₂ tax for major emitters, ensuring that polluters paid for their emissions for the first time; and CBAM-related rules that enabled climate‑linked surcharges on imported goods, similar to mechanisms in the European Union. As a result, emissions became tangible financial risks, and firms that continued to rely on carbon‑intensive processes faced significantly higher costs.
Adaptation plans and sustainability taxonomy
Beyond emission cuts, the act mandated nationwide climate adaptation planning. Provinces and municipalities were required to develop strategies against droughts, floods and extreme weather, challenges that had already hit Thailand hard. In addition, a national sustainability taxonomy was to define clearly which activities counted as “green”, sending clear signals to investors and steering the financial sector towards sustainability.
Uncertain details but clear financial consequences
Key parameters such as CO₂ tax rates, allocation rules for the emissions trading system and specific CBAM provisions were still to be decided. However, the legislation made clear that companies would have to pay and disclose their climate data. Large emitters were urged to prepare for the end of what the law framed as an era of cost‑free pollution, as environmental damage would translate into concrete financial liabilities in the future.