You are using an outdated browser and your browsing experience will not be optimal. Please update to the latest version of Microsoft Edge, Google Chrome or Mozilla Firefox. Install Microsoft Edge

February 8, 2023

Thailand’s Competition Law and Regulations: Background and Outlook for 2023

Thailand has a robust legal framework for competition, with laws and regulations in place to prevent anticompetitive conduct and market concentration and to promote fair competition. However, as the business environment in the country continues to evolve, it is important for companies operating in Thailand to stay informed about the latest developments in competition laws and regulations.

Generally, Thailand’s competition regime is based on the Trade Competition Act B.E. 2560 (2017) (the TCA) and its implementing regulations, except for certain industries which are governed by sector-specific competition regulations. The TCA is designed to promote free and fair competition by suppressing anticompetitive behaviors.

In this article, we will examine what businesses can expect in the coming year, and what they need to be aware of in order to stay compliant.

A Maturing Regulatory Structure

The Trade Competition Commission of Thailand (TCCT) is the agency responsible for enforcing competition laws and regulations in Thailand. The TCCT has the authority to oversee the market structure, act to maintain competitiveness in various industries, investigate misconduct, and take action against companies that engage in anticompetitive practices, such as abuse of market dominance, cartels, and unfair trade practices. It also has discretionary power to consider applications for a merger of two or more businesses that may cause monopoly or market dominance.

While the TCA and the TCCT had limited success in the decades after the original TCA’s enactment in 1999, a new TCA in 2017 made several significant changes to the previous version of the law. The 2017 TCA guarantees the independence of the TCCT from political and business interventions. It also introduces administrative penalties for less-serious offenses, including non-hardcore cartels, unfair trade practices, and neglect of merger filing duties.

Since then, the TCCT has been more active in its issuance of subordinate regulations to optimize the functionality of TCA provisions. A number of business-specific guidelines adopted from time to time address competition concerns in certain business sectors, such as modern trade, franchises, and food delivery services. The TCCT has also issued rules that purchasers must follow when setting credit terms for SMEs (small and medium enterprises).

The level of enforcement has also escalated, evidenced by more than 60 cases determined and concluded during 2019–2021—mostly regarding merger filings and unfair trade practices. In recent years, the TCCT has had oversight of several high-profile mergers, issuing remedies and closely keeping track of the companies’ business conduct to ensure compliance with fair trade and competition requirements. The administrative office of the TCCT has also accomplished the first proactive investigation procedures involving unannounced inspections, commonly known in some jurisdictions as “dawn raids,” conducted at the accused’s premises to obtain useful evidence for cartel misconduct.

TCCT’s academic role has also been well recognized. The TCCT has conducted market studies of many emerging industries, such as e-commerce and marketplace platforms, to understand business practices and identify potential anticompetitive behaviors. The TCCT also acknowledges that the TCA should not stop evolving in today’s complex economy. In collaboration with the Thailand Development Research Institute, the TCCT studied whether and how to improve the TCA and its enforceability, resulting in the proposal of significant amendments to the TCA.

The regulatory structure of Thailand’s competition regime has matured a great deal in the past five years. This increased reliability is likely to continue in 2023 as the TCCT looks to deal with concerns about today’s market conditions.

TCCT and Emerging Issues

One of the key areas of focus for the TCCT in the coming year will be the digital economy. With the rapid growth of e-commerce and online platforms, the TCCT will be closely monitoring the growing market power of these operators to ensure that competition is fair and that consumers’ selection of goods and services is not manipulated. This is particularly important as the COVID-19 pandemic has accelerated the shift to what the Thai government has called the “platform economy.” Recognizing that some plaftform operators’ conduct and trade conditions could damage competitors and trade partners, or restrict consumers’ choices, the TCCT set out to develop a new set of regulations and strategies to address these competition concerns. In this regard, the TCCT may adopt new legislation modeled on the Digital Markets Act of the European Union to more efficiently tackle anticompetitive conduct by digital marketplaces and online gatekeepers.

One of the TCCT’s missions in the year ahead will be to revitalize its existing regulations. The TCCT is prepared to raise the threshold for determining whether a company is in a position of market dominance, in light of the country’s economic growth and heightened inflation. Another area of focus is amendments to enhance the clarity of merger control rules and to extend the scope of control to certain types of mergers such as a full-function joint ventures, which are not yet clearly regulated under the current rules.

In terms of enforcement mechanisms, the TCCT is studying the possibility of implementing a leniency program that would grant immunity to whistleblowers who expose collusive arrangements. This leniency program would be a highly useful instrument for the TCCT in detecting cartels, similar to the success of leniency policies in exposing collusion in the United States, the European Union, Japan, and other jurisdictions.

Conclusion

Overall, businesses operating in Thailand can expect the TCCT to continue its efforts to promote fair competition and to intensify the level of enforcement in the coming year, with a particular focus on the digital economy and merger control. Companies should stay informed about the latest developments in competition laws and regulations and seek legal advice when necessary to ensure compliance. While competition is just one of the many areas of compliance that businesses have to uphold, enlisting outside assistance in maintaining a healthy and resilient presence in the market can greatly ease the burden.

RELATED INSIGHTS​ 

February 25, 2026
Tilleke & Gibbins has updated the Vietnam chapter in the newly released Licensing 2026 guide, published by Lexology Panoramic. The comparative guide provides companies and other interested readers with information on licensing law and practice in various countries around the world. Licensing 2026 provides detailed information on the following topics: Restrictions, laws and licensing arrangements Intellectual property issues: Paris Convention for the Protection of Industrial Property, contesting the validity of licensor’s IP rights, invalidity and expiry of IP rights, security interests, proceedings against third parties, sublicensing, jointly owned IP, first to file, scope of patent protection, trade secrets, copyright Software licensing: Perpetual licensing, legal requirements, user restrictions Royalties and payments, currency conversion, and taxes: Relevant legislation, restrictions, taxation of foreign licensors Competition law issues: Restrictions on trade, legal restrictions, and IP-related court rulings Indemnification, disclaimers, and damages: Prevalence and enforceability of indemnity provisions and contractual waivers of damages Termination: Right to terminate, impact of termination Bankruptcy: Impact of licensee or licensor bankruptcy Dispute resolution: Governing law, arbitration, enforceability, injunctive relief, contractual waivers The Vietnam chapter is available below as a PDF. Readers can gain 30 days of complementary access to the full Licensing 2026 guide and the rest of Lexology Panoramic’s varied offerings through this link.
February 20, 2026
The past year has been an important one for the Trade Competition Commission of Thailand (TCCT). With a right combination of commissioners bringing expertise in competition law, investigations, administrative procedures, court processes, and sector-focused industries, the regulator has pushed forward with stronger enforcement efforts and closer cooperation with both domestic and international stakeholders. In 2025 the TCCT participated in major international initiatives—including peer reviews conducted by the OECD and ASEAN. These efforts reflect Thailand’s ongoing ambition to elevate its competition law framework to meet international expectations and build trust among global communities. There was also significant momentum around potential amendments to the Trade Competition Act (TCA). Political parties, the TCCT, the private sector, and civil society all agreed that the 2017 law could benefit from clearer rules and more effective enforcement tools. Although a draft amendment passed an initial reading and moved to a subcommittee for revision, the process stalled following the dissolution of Parliament. At the same time, the TCCT invested heavily in strengthening its own internal capabilities. It expanded collaborations with organizations such as the OECD, ASEAN authorities, the EU, and counterparts in Japan and Australia. The TCCT also published sector-specific market studies, including on digital platforms and e‑marketplaces and on cold‑rolled steel. The regulator also shared draft guidelines aimed at regulating online platforms—although these have not yet been finalized. What’s Next for the TCCT? Looking ahead, the TCCT is set to keep building on the momentum it has created and be a more active, transparent, and practical regulator. It is likely to become even more visible in the public sphere as it steps up efforts to raise awareness about competition law, especially among businesses that may not traditionally follow or be familiar with such regulatory developments. Digital markets, including e‑commerce and online marketplaces, will remain a
February 19, 2026
Thailand’s Securities and Exchange Commission (SEC) has overhauled its approach to related-party transactions (RPTs) by issuing new rules that simplify approval processes while expanding oversight. Capital Market Supervisory Board Notification No. TorJor. 46/2568 will replace the longstanding Notification No. TorJor. 21/2551, which has governed RPT compliance for over a decade. The new regulation takes effect on July 1, 2026. Any RPT matters approved by a company’s board of directors or approved for shareholders’ approval before that date remain subject to Notification No. TorJor. 21/2551. The new RPT rules will introduce significant changes that market participants should carefully consider. Consolidated Definitions Under the previous framework, key definitions relevant to RPT compliance were dispersed across multiple sources, including SEC notifications, Stock Exchange of Thailand (SET) regulations, and provisions of the Securities and Exchange Act (before amendments). The new regulation consolidates these definitions into a single notification. Concepts such as “related party” and “connected person,” as well as relevant transaction categories, are now more systematically organized and written in greater detail. The SET has yet to issue corresponding regulations, which should include more detailed related disclosure requirements. Unified Threshold and Mandatory Board Approval The most significant change under the new regulation is the elimination of the multitiered approval framework based on transaction type. Instead of various categories, transactions are now classified as either (1) financial assistance provided to related persons, or (2) other RPTs in order to determine the level of corporate approvals and disclosures for each transaction size in these categories, but the concept remains the same. Under the previous regulation, RPTs were divided into small, medium, and large transactions, with differing approval requirements. The new regulation effectively merges the small and medium categories. As a result, all RPTs must now be approved by the board of directors as a baseline
February 19, 2026
Thailand’s Securities and Exchange Commission (SEC) has issued a new regulation on material transactions (MTs) to govern asset acquisitions and disposals by listed companies and their subsidiaries. The new notification on MT criteria (No. TorJor. 45/2568) from the Capital Market Supervisory Board replaces the long-standing notification (No. TorJor. 20/2551) that has governed such matters. The SEC has also introduced parallel amendments to the country’s related-party transaction rules. The new regulation will take effect on July 1, 2026. Any MT matters approved by a company’s board of directors for shareholders’ approval before that date remain subject to Notification No. TorJor. 20/2551. Following that date, the new MT rules will introduce several significant changes that market participants should carefully consider. Expanded Scope of Material Transactions One of the key changes under the new regulation is the expansion of the definition of MTs, which now expressly covers financial assistance and certain lease and business lease arrangements that are not in the ordinary course of business of the listed company or its subsidiaries. For financial assistance, this includes lending, granting credit, providing guarantees, or entering into any arrangement that increases the company’s financial obligations, particularly where the recipient is facing liquidity issues or unable to repay debts. Other forms of financial support also fall within scope. However, whether the provision of collateral for others qualifies as an MT remains somewhat unclear, since no disposal of assets occurs for the provider of collateral. This issue remains to be carefully considered. For lease-related transactions, the MT rules now specifically include the lease or hire-purchase of all or part of a business or assets operated by or belonging to a listed company or its subsidiaries. New Exemptions The new regulation introduces clearer exemptions for transactions between a listed company and its subsidiaries or among subsidiaries, which