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

June 11, 2025

Amended Law Empowers Thailand’s Tax Court to Hear Criminal Tax Cases

Subscribe to Updates

Thailand’s tax dispute resolution framework has undergone a significant transformation with the enactment of the Act Establishing the Tax Court and the Procedure for Tax Cases (No. 3) B.E. 2568. Published in the Government Gazette on May 27, 2025, the amended act will come into force on November 24, 2025, which is 180 days after its publication. The amended act marks a pivotal shift in the jurisdiction and procedures of the Tax Court, most notably by empowering it to adjudicate certain criminal tax cases for the first time.

Background and Rationale

The Tax Court was originally established in 1985 as a specialized forum to handle complex tax disputes, including those related to revenue, customs, and excise taxes. The creation of the Tax Court recognized the need for judicial expertise in tax law, given its technical and specialized nature. The latest amendment is designed to address procedural inefficiencies, modernize court processes, and align Thailand’s tax litigation system with international standards. The reform demonstrates Thailand’s commitment to enhancing the efficiency, transparency, and fairness of its tax dispute resolution mechanisms.

Key Amendments and Provisions

Six of the key changes in the amendment are highlighted below.

  • Expansion of jurisdiction to criminal tax cases. The most significant change is the extension of the Tax Court’s jurisdiction to include criminal offenses under the Revenue Code, customs law, excise tax law, and other tax-related laws that may be specified by royal decree. New sections in the act explicitly grant the Tax Court authority to hear and decide criminal tax cases, so individuals and entities accused of criminal tax evasion or other tax-related crimes will now have their cases heard by judges with specialized tax expertise. The law also clarifies the Tax Court’s jurisdiction when a single act constitutes multiple offenses (some tax-related, some not) or when there are multiple related offenses. Cases that fall under the jurisdiction of the Juvenile and Family Court remain excluded from the Tax Court’s criminal jurisdiction.
  • Revised definition of “tax case.” The definition of a “tax case” has been streamlined to mean any case under the jurisdiction of the Tax Court, reflecting the court’s new authority to hear criminal matters.
  • Adaptation of procedural laws. The procedural framework for the Tax Court has been updated to accommodate criminal cases. Where the act or its regulations do not provide specific procedures, the Civil Procedure Code, the Criminal Procedure Code, or the law on the establishment and procedure of khwaeng-level courts will apply as appropriate. This ensures that the Tax Court can effectively manage both civil and criminal tax cases using established legal standards.
  • Appeals process. Amendments to the appeals process clarify that appeals in criminal tax cases will follow the Criminal Procedure Code, while civil tax cases will continue under the Civil Procedure Code.
  • Procedure for nonappearance in noncriminal cases. For noncriminal tax cases, if a party is notified of a hearing but fails to appear, it is their responsibility to ascertain the next hearing date. Failure to do so will be deemed as having been informed of the proceedings.
  • Transitional provisions for pending criminal cases. Criminal tax cases already pending in other courts before the effective date of the amended act will continue in those courts until final judgment, ensuring continuity and preventing disruption of ongoing proceedings.

Procedural Regulations

To supplement the act, which lacks detailed procedural rules for conducting tax cases and managing evidence, the chief judge of the Central Tax Court (currently the only operational tax court in Thailand) will issue specific regulations. These regulations, requiring the approval of the chief justice of the Supreme Court, will define court procedures and the criteria for evidence admissibility and evaluation. According to information from the Central Tax Court, these regulations are currently being drafted and are undergoing internal discussion and debate.

Outlook

The primary objective of this legislative update is to consolidate the adjudication of criminal tax offenses within the specialized Tax Court system. By doing so, Thailand aims to leverage the expertise of tax judges for both civil and criminal tax disputes, promoting consistency, efficiency, and fairness in tax litigation. The other amendments are designed to ensure procedural coherence and a smooth transition to the new system.

With the enactment of this law, Thailand’s Tax Court will soon serve as the central forum for both civil and criminal tax cases, marking a significant step forward in the country’s legal and judicial landscape for tax matters. This reform is expected to enhance the quality and effectiveness of tax dispute resolution, benefiting taxpayers, legal practitioners, and the broader business community.

Related Professionals

Practices

Dispute Resolution and Litigation

Tax

Location

RELATED INSIGHTS​ 

April 28, 2023
Thailand’s legal system is based on European continental civil law systems, with a three-tier court system. Precedents set by the Thai Supreme Court are merely considered as examples of the application of laws and are not binding on Thai courts. While the country’s judiciary and dispute resolution mechanisms are well developed, some aspects can be unfamiliar or even surprising to counsel unfamiliar with the Thai court system. This article introduces some of the Thai civil court procedures and practices, and covers several key issues it is important to understand regarding civil litigation in Thailand. Offers of compromise or settlement In Thailand, there is no such thing as an ‘offer without prejudice’. Anything put in writing can be used against the offering party. Therefore, compromises, settlements, and offers to compromise or settle should not be made before consulting with legal counsel. Similarly, parties at trial or anticipating litigation should be cautious in all communications with the opposing party. Location of assets Before initiating litigation, plaintiffs should investigate the nature and extent of the defendant’s assets in Thailand and abroad. A monetary judgment is of limited value if the defendant has little or no recoverable assets. Therefore, any information a claimant has on the opposing party should be assessed at the beginning of the case or as soon as is reasonably possible. Language of documents All documents submitted to a Thai court must be in the Thai language. Foreign documents must be the originals or certified copies, and certain documents also need to be notarised and then authenticated by a Thai consular official. Court costs A plaintiff must pay a court filing fee when submitting a case. This is usually 2% of the claim amount but will not exceed THB 200,000 per action for claims of up to THB 50 million.
Read More
April 11, 2023
A significant new procedural law for fines in Thailand results in the mass removal of certain types of fines for criminal penalties and alters procedures for certain administrative monetary penalties.   There are generally two types of fines imposed under Thai law: criminal fines and administrative fines. However, there will soon be a type of fine that exists outside of the criminal or administrative legal mechanisms: the phinai fine, which is neither a criminal penalty nor an administrative fine. Instead, a phinai fine—which must be paid to the state—is one assessed in lieu of criminal penalties for less-serious offenses. Perhaps the closest equivalent to a phinai fine would be a “civil” fine, but there is no official translation of Thailand’s first law dedicated to these fines, the Act on Phinai Fine Proceedings B.E. 2565 (2022) (ACFP), which was published in the Government Gazette on October 25, 2022. Before proceeding further to discuss the significance of the new law, a note should be made regarding the term phinai. As there has been no official translation of the ACFP, there is currently no official translation of phinai. Under the ACFP, “to seek a phinai fine” (or prap pen phinai) was determined to have the specific meaning of ordering a phinai penalty offender to pay a phinai fine. The meaning of the term as defined reflects a type of phinai penalty, which is neither a criminal penalty nor an administrative fine. In the future, there is a possibility that the official translation of the ACFP may use a different term. The passage of the ACFP provides Thailand with a special procedural law for all phinai fines, ultimately resulting in a significant change in the categorization and collection of fines and administrative monetary penalties. Other than two sections on administrative preparations that took
Read More
March 30, 2023
Digital asset litigation is one of the most cutting-edge types of litigation in Thailand. There are factual, technical, regulatory, and legal challenges and hurdles for the parties to the dispute throughout all procedural stages. This is mainly because digital assets are different in nature from more conventional types of assets, as they are digitally created and used on a blockchain network. Legal Status The first issue to be aware of in approaching digital asset litigation is the legal status of digital assets. Under Thai law, there are two key terms concerning digital assets’ legal status: “thing” and “property.” Things are tangible objects, while property provides a much wider range of meaning. Property could be anything—including intangible objects that may be of value and able to be appropriated. It is fairly clear that digital assets are not a “thing” since they are not tangible. However, determining whether digital assets are “property” is even more complicated. Although digital assets are intangible objects, one might argue that, unlike fiat money, they do not have any inherent value but are rather conferred value based on certain people’s perspective. (For example, the Bank of Thailand expressed this opinion of bitcoin in 2014.) Some may even argue that digital assets cannot be possessed and therefore cannot be appropriated. According to these arguments, digital assets should not be regarded as a property either. Legal Grounds Determining whether digital assets are things, property, or something else altogether is crucial to any subsequent litigation. In Thailand, the party initiating the lawsuit (the plaintiff) generally has to state the relevant legal grounds for the complaint—that is, the different relevant legal provisions that the court is to apply to the case. These provisions of Thai laws mostly refer only to “things” or to “property,” not both. This often means that
Read More
March 21, 2023
From the perspective of a plaintiff (or a group of plaintiffs) considering initiating a class action in a Thai court, a primary benefit of proceeding as a class action is the ability to aggregate claims that would otherwise be too small or too costly to bring individually. Where one plaintiff might lack a claim large enough to make pursuing litigation a cost-effective option, the combined claims of many plaintiffs could surpass that threshold. Similarly, the prospect of representing a number of plaintiffs, along with the potential legal fees that could be awarded with a win, should serve as an incentive for counsel to represent a class of plaintiffs who, acting individually, would otherwise not be able to engage a lawyer interested in taking their case. For these same reasons, a defendant will most likely—although not necessarily always—oppose a plaintiff’s request that a case be allowed to proceed as a class action. From a defense perspective, preventing a case from proceeding as a class action could be a significant strategic goal, as it could mean that individual plaintiffs, as well as their counsel, would lack the financial incentive to pursue potentially costly litigation for their separate, relatively low-value claims. Potential defendants, therefore, may benefit considerably by understanding how a Thai court determines whether a case can proceed as a class action and, if it does, the potential options for a defendant that objects to this determination. The Court’s Initial Determination: Class Action or Ordinary Litigation? When a named plaintiff requests that a case proceed as a class action, that plaintiff must present the case to the court in accordance with the prerequisites stipulated by Thai law. The Civil Procedure Code (CPC) sets out the prerequisites for a case to proceed as a class action. Considerations include: whether the nature of
Read More