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

April 28, 2026

Thailand Strengthens Anticorruption Rules for Large Public Procurement Projects

Thailand’s Anti-Corruption Cooperation Committee has issued a major update to the anticorruption standards required for private entities engaging in high-value state projects. The update, titled “Announcement re: Procurement Limits and Minimum Anticorruption Standards (No. 2),” replaces and amends key provisions of the original announcement dated September 25, 2024.

Published in the Government Gazette on April 10, 2026, the new rules take effect on May 10, 2026, and apply to projects valued at more than THB 300 million (approximately USD 9.3 million).

The key amendments to the anticorruption standards are detailed below.

Expanded Definition of Conflict of Interest

The 2026 regulation significantly broadens the scope of what constitutes a conflict of interest compared to the 2024 version, which focused primarily on basic kinship and business ties. Under the new rules, a conflict of interest includes using one’s position or authority to seek benefits for oneself, a group, close associates, or business, including through business relationships, kinship ties, or relationships with spouses or individuals living together as partners without marriage registration. The 2026 announcement also introduces specific examples that were largely absent from the 2024 text, such as holding shares in similar businesses that submit proposals for the same project, or submitting proposals for projects in which a relative, spouse, or unregistered partner is an “involved party” in that procurement.

Continuous Compliance: The “Final Payment” Rule

Under the 2024 rules, the coverage period for anticorruption policies was less strictly defined. The new regulation mandates a continuous timeline: policies or certifications must remain effective from the date of bid submission until the contractor receives the final payment installment under the contract. If a certification or policy is set to expire before the final payment, the contractor must submit a new self-audit form and supporting evidence to the state agency before the original document expires.

Mandatory Qualification Requirements in the TOR

State agencies will now bear an explicit administrative obligation to embed anticorruption requirements in their procurement documents. Specifically, agencies must define in the scope of work (TOR) and procurement announcements that bidders are required to meet minimum anticorruption standards. Bidders must attach an updated Entrepreneur Information Check Form, along with supporting evidence, as part of their proposal, and must fulfill every requirement in the checklist to pass the qualification stage.

Updated Self-Audit Form

The 2026 regulation invalidates the self-audit form attached to the 2024 announcement and replaces it with a new version. The new form requires specific confirmation of the following:

  • A written, current anticorruption policy;
  • Designated units or persons responsible for anticorruption compliance;
  • Whistleblowing systems and annual training plans; and
  • Policy reviews conducted at least every three years.

Compliance Actions

Given the expanded conflict of interest definition, companies should immediately review their internal disclosure policies to ensure they capture unregistered partnerships and indirect business ties. Project management teams must also track the expiration of anticorruption certifications as a critical contract milestone, since any lapse in coverage could jeopardize final payments or future eligibility.

RELATED INSIGHTS​ 

February 6, 2017
Attorneys from Tilleke & Gibbins have written the Vietnam chapter of Practical Law Company’s Doing Business in … Global Guide, an essential handbook for businesses looking to expand their operations abroad. The guide provides a practical overview of the legal system in more than 50 jurisdictions worldwide, with the Vietnam chapter including the following main subjects:
January 24, 2017
The 2017 edition of Doing Business In…, a Q&A-style guide published by Practical Law Company in collaboration with Lex Mundi, presents an overview of recent legal developments affecting doing business in 51 jurisdictions worldwide. The Thailand chapter of the guide was written by attorneys from Tilleke & Gibbins and presents an overview of Thailand’s legal system and key laws applicable to foreign companies doing business in the Kingdom. The chapter specifically covers the following main topics:
January 4, 2017
Effective anti-corruption compliance programs are tailored for local jurisdictions. While bribery methods share common characteristics, different countries usually have their own business or cultural norms which impact corruption risks. In one country, for example, it may be common for bribes to be disguised as charitable contributions; while in another, political contributions are the favored method to make illicit payments.
December 23, 2016
Thailand remains a favored hotspot for foreign direct investment (FDI) despite regional and global economic fluctuations. The country has focused intensely on efforts to consistently improve its standing as an FDI destination, gaining popularity among foreign investors because it offers an attractive and modern legal framework, reasonable input costs and a favorable geographic location.