Thailand’s PDP 2026: A Long-Awaited Roadmap for the Country’s Energy Future
Thailand’s new Power Development Plan (“PDP”) is one of the most consequential policy documents for the country’s energy and infrastructure sectors. More than simply a forecast of future electricity demand, the PDP provides the long-term framework for Thailand’s power system, influencing what types of generation capacity will be developed, when new capacity will be required, how the transmission system should evolve, the role of renewable and other clean energy sources, and the direction of future power procurement.
For investors, developers, lenders and large electricity users, the significance of the PDP extends well beyond the power sector itself. Decisions taken under the PDP will influence Thailand’s ability to provide reliable and competitively priced electricity, accommodate new investment in energy-intensive industries, facilitate access to renewable electricity and ultimately maintain the country’s competitiveness as global supply chains become increasingly carbon-conscious.
A plan whose importance has grown as its adoption has been delayed
The challenge is that Thailand has been waiting for a new PDP for some time.
The PDP currently in force remains PDP 2018 Revision 1, which was approved by the National Energy Policy Council (the “NEPC”) on 19 March 2020 and subsequently by the Cabinet on 20 October 2020. Since then, successive efforts to prepare a replacement have produced various iterations, including the draft PDP 2022 and the draft PDP 2024, neither of which was adopted, culminating in the present PDP 2026.
The draft PDP 2024 had already undergone public consultation in 2024, but the planning exercise was subsequently revisited as Thailand’s economic, political and energy assumptions continued to change. The revision process has spanned several administrations, with changes in government contributing to its reconsideration on multiple occasions. This delay has occurred at a time when the underlying assumptions for Thailand’s electricity system have themselves been changing rapidly.
Demand from data centres, artificial intelligence infrastructure and electric vehicles is creating a new category of large and potentially concentrated electricity loads. At the same time, manufacturers and multinational investors increasingly require demonstrable access to clean electricity to meet internal decarbonisation commitments and international carbon-related requirements. Geopolitical volatility has meanwhile reinforced the importance of energy security and the risks associated with reliance on imported fossil fuels.
The cost of delay is therefore not limited to the power industry. It can affect investment decisions, project pipelines, grid development and Thailand’s ability to provide investors with visibility on future electricity supply and clean-energy availability. Thai commentators have accordingly characterised the prolonged PDP process as creating a growing “opportunity cost” for the country.
Where does PDP 2026 now stand?
There are encouraging indications that the new plan is now at a more advanced stage.
The Energy Policy and Planning Office (“EPPO”) indicated in June 2026 that PDP 2026 was expected to be completed during August–September 2026. The process has since advanced further. The sub-committee responsible for preparing the draft met on 17 August 2026 to consider generation fuel-mix scenarios for submission to the Minister of Energy, and press reports indicate that the Ministry of Energy now expects to hold a public hearing in early September 2026. The draft would then be submitted to the NEPC for consideration in the fourth quarter of 2026, with the Government reported to be aiming to bring PDP 2026 into force before the end of the year.
The precise timetable should still be treated as indicative until the relevant governmental processes are completed. Nevertheless, the policy direction is becoming substantially clearer.
Clean energy moves to the centre of the plan
The Government has indicated that PDP 2026 will extend Thailand’s power planning horizon to 2050, in line with the Government’s accelerated target of achieving net-zero greenhouse gas emissions by 2050 (brought forward from the previously announced 2065 target), with a target for clean electricity to account for approximately 60% by 2050.
Solar power is expected to play a substantial role, together with wind, biomass and other sources of low-carbon electricity. The Government has also highlighted grid modernisation and energy storage as necessary components of a system incorporating significantly greater volumes of intermittent renewable generation.
Small modular reactors (“SMRs”) have also emerged as a potential component of Thailand’s future generation mix. Recent reporting on the draft has referred to 2,400 MW of SMR capacity, four times the 600 MW contemplated in the draft PDP 2024, although the ultimate capacity, timing and implementation structure will depend on the final PDP and subsequent regulatory and project-development decisions.
For investors, the important point is not simply the headline percentage of clean energy. The final PDP should provide greater visibility on when, where and through what mechanisms new generation capacity is expected to enter the system.
Direct PPAs and a changing electricity market
One of the most significant developments associated with the PDP is the Government’s continuing move towards greater access to renewable electricity procured directly from generators under direct power purchase agreements (“Direct PPAs”).
On 15 July 2026, the NEPC approved a package of measures intended to open Thailand’s clean-electricity market to greater competition. The measures include expansion of direct renewable power purchase arrangements beyond data centres, allowing a broader range of businesses to purchase clean electricity from generators through third-party access to the electricity grid. The July resolution is also reported to have removed the 2,000 MW ceiling that applied to the original Direct PPA pilot approved by the NEPC in June 2024. The Energy Policy Administration Committee approved the underlying principles on 3 August 2026, and the Energy Regulatory Commission (“ERC”) has since put the revised electricity-purchasing framework through the public consultation process required by law.
For developers and corporate electricity users, the development of Direct PPA arrangements may create new project structures and contracting opportunities. The commercial significance, however, will depend heavily on the detailed regulatory architecture, including eligibility, grid access, wheeling charges, balancing responsibilities, connection requirements and the interaction between Direct PPAs and the existing electricity market.
What should investors watch next?
Once PDP 2026 is adopted, attention will turn to how the policy is translated into implementable measures. In particular, developers, investors, financiers and large electricity consumers should monitor:
• the final generation mix and capacity additions under PDP 2026;
• future renewable-energy procurement rounds and allocation mechanisms;
• the implementation rules for Direct PPAs and third-party access;
• grid expansion, connection capacity and energy-storage requirements;
• the treatment and timing of SMRs and other emerging technologies;
• changes affecting existing PPAs and renewable-energy arrangements; and
• the regulations, resolutions, licence conditions and contractual frameworks through which the PDP will ultimately be implemented.
Recent developments already demonstrate that certain reforms may move forward in parallel with the PDP. The measures on clean-electricity market access, community solar and electricity pricing illustrate that the Government is beginning to address aspects of the wider electricity-market structure even before the new PDP is finally adopted.
Reasons for cautious optimism
Thailand’s new PDP has taken longer to emerge than many market participants had hoped. The delay has created uncertainty at precisely the time when electricity policy has become increasingly important to decisions regarding industrial investment, data centres, renewable development and decarbonisation.
There is nevertheless reason for cautious optimism.
The debate surrounding PDP 2026 is now addressing issues that are materially different from those confronting Thailand when the existing PDP was approved in 2020. Clean electricity, Direct PPAs, grid modernisation, energy storage, data-centre demand and new generation technologies are no longer peripheral issues; they are becoming central elements of Thailand’s energy strategy. The Government has also expressly linked the energy transition to the country’s economic competitiveness rather than treating it purely as an environmental objective.
If the final PDP is followed by clear, predictable and timely implementation, Thailand has an opportunity to use the period of delay to produce a more forward-looking framework, one capable of supporting the next generation of energy and infrastructure investment while providing the clean, reliable and competitively priced electricity increasingly demanded by international investors.
After a long period of waiting, PDP 2026 may represent not simply an updated power plan but an opportunity to provide the policy certainty needed for Thailand’s next phase of energy transition and economic growth.
