Asia Climate Bulletin

Thailand’s Climate Change Act: A Structural Shift toward Economy-wide Carbon Regulation

Thailand is on the verge of a major transformation in how it regulates environmental issues. Its draft Climate Change Act signals a decisive move away from fragmented, sector-specific pollution laws toward a unified, economy-wide framework for managing greenhouse gas emissions.

For decades, Thailand’s environmental policies evolved incrementally, targeting discrete issues such as air pollution, water contamination, and waste management. In the face of increasingly severe impacts of climate breakdown, the draft Act represents a fundamental shift by introducing a coordinated system addressing climate change holistically and aligning the country with global decarbonisation trends.

From Fragmented Rules to a Unified Climate Framework

At its core, the draft legislation establishes a centralised governance model for climate policy. Individual regulatory instruments are unified into a single architecture founded on:

National emissions targets
Centralised planning and oversight
Mandatory compliance mechanisms
Market-based tools such as carbon pricing

The act is designed to translate Thailand’s climate commitments into enforceable obligations at both sector and company levels, embedding climate accountability into business operations.

Key Policy Mechanisms Businesses Should Anticipate

The draft Act introduces several regulatory instruments that will directly affect companies operating in Thailand:

Mandatory greenhouse gas reporting for designated entities
Emissions Trading System (ETS) to enable market-based emissions reductions
Potential carbon tax, linked to emissions intensity
Regulated carbon credit system, covering verification, issuance, and trading

Oversight will sit with a national climate policy body responsible for strategy and coordination, while implementation and enforcement will be distributed across relevant ministries and specialised regulators.

Importantly, implementation is expected to be phased – probably prioritising high-emitting industries first.

Several converging forces are accelerating Thailand’s move toward comprehensive climate legislation:

Net-zero commitments at the national level
International trade pressures, particularly mechanisms like the EU’s Carbon Border Adjustment Mechanism (CBAM)
Investor expectations for credible and transparent sustainability frameworks

For exporters, especially those exposed to European markets, the absence of domestic carbon pricing could translate into competitive disadvantages. The Act aims to mitigate this risk by aligning Thailand’s regulatory environment with emerging global standards.

Green Taxonomy and the Risk of Greenwashing

Alongside the Act, Thailand is developing a national green taxonomy – a classification system that categorises economic activities based on environmental sustainability using a “traffic light” model:

Green: environmentally sustainable
Amber: transitional
Red: unsustainable

Although initially voluntary, the taxonomy is expected to become a cornerstone of disclosure requirements, sustainable finance, and policy incentives.

This raises the stakes for corporate claims. Misrepresenting environmental performance could expose companies to regulatory enforcement, investor-related liabilities, and consumer protection risks. In other words, greenwashing is likely to face far stricter scrutiny.

Regional Integration and Carbon Market Connectivity

The draft Act also anticipates future integration with carbon markets across Southeast Asia. While a unified ASEAN carbon market doesn’t yet exist, the framework is being designed to support interoperability through:

Bilateral or multilateral linkages
Mutual recognition of carbon credits
Regulatory equivalence across jurisdictions

For multinational companies, this introduces additional complexity. Key considerations include:

Harmonising carbon accounting across jurisdictions
Verifying which credits are recognised in different markets
Managing legal treatment of carbon assets (e.g. ownership, trading, insolvency implications)

Early alignment of systems and contractual clarity around carbon rights will be essential to reduce future regulatory and transactional risk.

An Adaptive Regulatory Framework

A notable feature of the draft legislation is its adaptability. It incorporates a mandatory five-year review cycle, allowing policymakers to:

Adjust emissions targets
Expand sector coverage
Refine market mechanisms

This ensures the framework remains responsive to evolving climate science, technological developments, and international obligations.

Timeline and What Businesses Should Do Now

While the Act has progressed through key approval stages, political developments have delayed its formal enactment. Initial expectations of implementation around 2025 have extended into 2026.

However, companies that begin preparing now will be better positioned to navigate compliance, manage risk, and compete in a global market that is rapidly pricing carbon into every aspect of trade and investment.

Priority actions include:

Establishing robust emissions baselines
Implementing internal carbon accounting systems
Publishing concise and meaningful ESG reports

At 51toCarbonZero, we’re poised to help organisations collate robust climate-related data through our dedicated net-zero transition platform, manage climate-related risk, and ensure they are positioned prominently among Thailand’s – and APAC’s – preferred businesses.

For a demo of our platform and a friendly chat about your business, please get in touch.