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

December 15, 2023

Lex Mundi Guide to Doing Business in Thailand 2023

As part of its membership in Lex Mundi, Tilleke & Gibbins has published an updated edition of its Guide to Doing Business in Thailand for 2023. This guide outlines the key factors for starting and operating a business in the Thai market. Issues covered include:

  • Investment incentives
  • Financial facilities
  • Exchange controls
  • Import and export regulations
  • Structures for doing business
  • Requirements for the Establishment of a Business
  • Operation of the Business
  • Cessation or Termination of the Business
  • Labor legislation, relations, and supply
  • Tax
  • Immigration requirements

This publication is part of Lex Mundi’s Country Guides series prepared by member firms in more than 100 jurisdictions worldwide. The guides serve as a useful resource for planning international business strategy and researching new markets. The full Guide to Doing Business in Thailand is available through the button below.

RELATED INSIGHTS​ 

June 29, 2026
Thailand’s cabinet has approved the draft Act on Liability for Defective Goods, commonly called Thailand’s “Lemon Law.” The Draft Act is currently pending consideration by Parliament. The draft law aims to strengthen buyers’ position in pursuing cases against sellers. While the Civil and Commercial Code offers provisions governing liability for defective goods, it is difficult in practice for buyers to successfully make a claim against sellers, particularly where defects are latent and not discoverable at the time of sale or delivery. By introducing product-specific rules and clearer remedies, the new law is intended to modernize Thailand’s consumer protection framework and align it more closely with international standards, and to help relieve the buyer’s burden of proof against the seller in product liability cases. If enacted, the draft act will take effect 180 days after publication in the Government Gazette, giving businesses a transition period to assess their compliance obligations. This article provides an overview of the key provisions of the draft act and highlights some practical considerations for businesses operating in Thailand. Scope and Key Definitions The draft act applies to sellers—defined as persons who sell goods in the ordinary course of business—and protects buyers, a term defined broadly to include not just the original purchaser but also transferees and successors in title. This expands the class of people who can bring claims. The law does not apply to used goods, live animals, or goods exempted by future ministerial regulation. It also leaves intact any separate warranties, promises, advertisements, or other guarantees a seller has given; those remain enforceable alongside the new statutory rights. General Liability for Defective Goods Sellers are liable for defects that exist at the time of delivery, regardless of whether the seller knew about them. Liability arises where a defect reduces: The benefit intended under
June 25, 2026
On June 18, 2026, Thailand’s Office of the Personal Data Protection Committee (PDPC) published two notifications in the Government Gazette establishing Thailand’s first formal certification framework for personal data protection standards under the Personal Data Protection Act B.E. 2562 (2019) (PDPA). The notifications, which took immediate effect, introduce a voluntary certification framework aimed at promoting accountability, strengthening organizational data protection governance, and aligning Thailand more closely with international frameworks that recognize certification as a key compliance tool. Certification Criteria The first notification sets out the assessment criteria for organizations seeking certification. Applicants must undergo an evaluation against a framework comprising four assessment categories, 10 focus areas, and 128 assessment criteria covering key elements of a privacy management program. These include: Organizational oversight and internal policies and procedures. Human resource development, including staff training and awareness programs. Clearly defined operational processes and procedures covering data subject rights, transparency obligations, records of processing activities, and lawful basis management, as well as contractual safeguards such as data-processing and data-sharing agreements and risk assessments, including Data Protection Impact Assessments. Technical measures encompassing data security controls and breach response capabilities Based on the assessment results, organizations may be awarded either a PDPA Compliance Certificate or a higher-level PDPA Certificate accompanied by a certification mark. Application and Assessment Process The second notification establishes the application and assessment process for obtaining certification. Eligible applicants include government agencies and private-sector entities that demonstrate sufficient privacy governance maturity and meet the prescribed eligibility requirements. Applicants must submit their applications along with supporting documentation for review. Upon receiving an application, the Office of the PDPC will conduct a detailed evaluation, which may include both documentary review and on-site inspections. Incomplete applications may be rejected, though applicants are typically given a limited period to correct deficiencies before a final decision
June 24, 2026
Patent enablement requirements are provided under Article 102 of Vietnam’s Law on Intellectual Property (IP Law). In particular, a patent specification must “fully and clearly disclose the nature of the invention to such an extent that, based on the specification, a person having ordinary skill in the relevant art can implement the invention.” In pharmaceutical and biotechnology patents, this requirement is more complicated and subject to more rigorous assessment. The Patent Examination Guidelines (Guidelines) of the Intellectual Property Office of Vietnam (IP Office) were amended in March 2026 to introduce Annexes III and IV for the pharmaceutical and biotechnology sectors, in which Annex III provides detailed guidelines on the assessment of specification requirements. These amendments were made under a project for strengthening capacity in industrial property examination between the Japan International Cooperation Agency (JICA) and the IP Office. Annex III provides detailed instructions on how examiners assess enablement in a pharmaceutical or biotechnology application, and offers examples of acceptable and unacceptable descriptions with regard to the enablement aspect. Enablement Requirements in Pharma and Biotech Patents Article 12.7 of Circular 10/2026/TT-BKHCN (Circular 10) adds to the requirements of Article 102 of the IP Law that the description must demonstrate the novelty, inventive step, and industrial applicability of the technical solution. For pharmaceutical composition subject matters, Article 12.9 of Circular 10 sets out that the description must present the results of clinical trials and/or the pharmacological effects of the claimed pharmaceutical composition, and must include at least the following information: Substance/mixture used. Testing method (system) employed. Information on the test results. Correlation between the pharmacological effects obtained from the tests and the application of the pharmaceutical product in the prevention, diagnosis, and treatment of diseases. The Guidelines note that pharmacological study results should be presented in a quantified manner, and pharmacological
June 23, 2026
On May 26, 2026, Thailand’s Department of Land Transport (DLT) published for public consultation a draft amendment to the Ministerial Regulation on Electronic Ride-Hailing Vehicles that would, for the first time, allow juristic persons (legal entities) to register vehicles as electronic ride-hailing cars—a right that currently belongs exclusively to natural persons, limited to one person per one vehicle. If finalized in its current form, the regulation would significantly expand the supply side of Thailand’s ride-hailing market by enabling corporate fleet operators to enter the space. The public comment period is open through June 24, 2026. Key Principles Under the Draft Regulation Under the proposed amendment, juristic persons that maintain a fleet of at least 50 vehicles will be permitted to register vehicles as electronic ride-hailing cars. This represents a fundamental shift from the current framework, which restricts registration to individual natural persons on a one-person-one-car basis. Vehicle Specifications Corporate-owned ride-hailing vehicles must meet the following requirements: Be brand new from the factory, or no more than two years old from first registration with no more than 20,000 km of use. Not be a vehicle that has been reconstructed or repaired after involvement in a serious accident affecting safety—a standard consistent with public transport vehicles (RorYor. 6). Be classified as small, medium, or large in accordance with ministerial or director-general specifications. The vehicles may be equipped with safety devices such as interior or exterior cameras (video/photo recording) and can retain the original factory color of the vehicle body (no mandatory color change is required). License Plates Corporate ride-hailing vehicles will use license plates of the same size, characteristics, and color as those for private passenger vehicles not exceeding seven seats (RorYor. 1), rather than public transport plates. Potential Impact The government has stated that the regulation is intended to: Promote