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

August 11, 2011

Guide to Doing Business in Thailand for Japanese Investors

Tilleke & Gibbins and Nishimura & Asahi

This Japanese-language Guide to Doing Business in Thailand was prepared by Tilleke & Gibbins in collaboration with Nishimura & Asahi, the Lex Mundi member firm for Japan. Written for potential Japanese investors in Thailand, the guide provides an overview of the Thai legal system, structures for doing business, and foreign investment regulations. It introduces other aspects of Thai law relevant to investment activities, including the following:

  1. How the courts and legal profession are organized, with an overview of fee arrangements.
  2. Legal requirements for selling goods/providing a service in Thailand, the correlating forms of business organizations that can be set up, the procedures (time, cost), and any other legal obligations.
  3. The different types of companies recognized in Thailand, the process of incorporating them, and the subsequent protection provided to shareholders, particularly minority shareholders.
  4. General corporate governance norms, the sharing of profits, and directors’ liability and responsibilities.
  5. Potential restrictions on foreign-owned Thai companies from raising capital or debt in Thai markets.
  6. The legal requirements for liquidation and winding up a company, as well as the Bankruptcy Act B.E. 2483 (1940).
  7. Foreign investment regulations (with reference to the Foreign Business Act B.E. 2542 (1999) and the Investment Promotion Act B.E. 2520 (1977)) covering subsidiaries and the foreign ownership of land.
  8. An overview of labor law in Thailand and regulations on maximum working hours, termination, leave, contract covenants, and stock options.
  9. An overview of intellectual property law in Thailand and the types of IP protected, international treaties, and regulatory authorities concerned.
  10.  Currency controls in place, particularly on amounts of local and foreign currency allowed in and out of the country.
  11. Methods of M&A available to Thai companies, and the process, timing, regulations, and forms of restructuring available to foreigners.
  12. Criteria determining a company’s tax liabilities and types of tax payable.
  13. A brief outline of the civil procedure in Thailand, foreign judgment enforcement, forms of alternative dispute resolution, and laws governing arbitral awards.

To learn more about how Tilleke & Gibbins can assist Japanese investors in Thailand, please contact Torajiro Ohashi at [email protected].

RELATED INSIGHTS​ 

September 25, 2026
On September 22, 2026, the Trade Competition Commission of Thailand (TCCT) opened a one-month public consultation period on proposed amendments to three key competition regulations, covering (1) the criteria for determining market dominance, (2) the definition of “monopoly” under Thailand’s premerger approval regime, and (3) the definition of a merger that may substantially lessen competition under Thailand’s postmerger notification regime. The public hearing period closes on October 21, 2026. The proposed changes could significantly affect merger filing obligations and the assessment of market dominance under the Trade Competition Act B.E. 2560 (2017) (TCA). The scope of the consultation and the proposed changes are outlined below. Market Dominance Criteria The draft notification on market dominance criteria proposes changes to the tests for both single-firm dominance and collective dominance, which would be measured using concentration ratios, as follows: Single-firm dominance: The proposed changes would lower the market-share threshold from 50% to 33% and the sales-turnover threshold from THB 1 billion to THB 500 million for the preceding year. Collective dominance: The three-firm concentration ratio (CR3) currently being used would be replaced by a two-firm concentration ratio (CR2). Under the new regime, the two largest operators in a relevant market would be considered dominant if their combined market share reached at least 75% in the preceding year. However, any business operator with sales turnover below THB 500 million or a market share below 10% would be excluded from this assessment. In addition to static or numerical thresholds, the proposed notification introduces a dynamic threshold or alternative criteria for assessing dominance in markets that change rapidly, experience short-term fluctuations in demand or supply, or use technology as a platform for conducting business, such as digital markets. Premerger and Postmerger Filing Thresholds Under the TCA, a premerger filing is required if a merger transaction
September 24, 2026
Vietnam is implementing and developing a broad package of regulatory reforms that could reshape how IP, data, digital platforms, and product authenticity are regulated and enforced. Several of the key measures have been led by the Ministry of Public Security in its legislative and administrative capacity, as part of a broader government effort. The core reform package consists of four key legal instruments: proposed amendments to the Criminal Code, a proposed new Data Security Law, a draft Decree on Product Identification, Authentication and Traceability, and the newly enacted Decree No. 330/2026/ND-CP. These instruments include rules on criminal enforcement, data security, electronic identification, product identification and traceability, administrative violations, and cybersecurity sanctions. Combined, these measures will affect copyright enforcement, industrial property rights, trade secrets, AI training data, product provenance, online takedowns, valuation of counterfeit goods and electronic evidence. It is worth noting that, in addition to strengthening criminal penalties for IP crimes, Vietnam’s emerging regulatory framework increasingly treats infringement, data misuse, product authentication, and platform-enabled violations as interconnected regulatory and enforcement challenges. For rights holders and foreign investors, this could mean stronger tools against counterfeiting and online infringement, but also more compliance obligations around data, traceability, AI, platform controls and government-facing reporting. Expansion of Criminal IP Enforcement Proposed amendments to Article 225 of the Criminal Code would expand criminal copyright exposure beyond reproduction and distribution to cover large-scale commercial public performance and online communication of works, phonograms and video recordings. This is important because piracy is increasingly about streaming, unauthorized communication, and platform access models rather than physical copying. Aggravated copyright infringement could be subject to up to 10 years in prison for individuals and fines of up to VND 6 billion (about USD 228,300) for commercial legal entities. The amended Article 226 would expand criminal industrial property liability beyond
September 23, 2026
Many multinational companies are familiar with the concept of “time off in lieu” (TOIL), under which employees receive compensatory time off instead of overtime pay for additional hours worked. While TOIL is common in many jurisdictions, employers in Thailand should be cautious, as Thai labor law does not expressly recognize TOIL as a substitute for statutory overtime-related compensation. Under the Labor Protection Act B.E. 2541 (1998) (LPA), employees who work overtime or perform work on holidays are generally entitled to statutory overtime, holiday, or holiday overtime compensation, including: Overtime Pay: 1.5 times the employee’s normal wage rate for work performed beyond normal working hours on a regular working day. Holiday Pay: 1 or 2 times the employee’s normal wage rate for work performed during normal working hours on a holiday, depending on category of employee. Holiday Overtime Pay: 3 times the employee’s normal wage rate for overtime work performed on a holiday. Importantly, the LPA does not contain any provision expressly permitting employers to substitute overtime-related compensation with compensatory leave, as such compensation is treated as a payment obligation rather than additional time off. Why TOIL Can Be Risky in Thailand Thai labor law is protective in nature, and statutory entitlements to overtime, holiday, and holiday overtime pay are generally regarded as minimum employee rights. As a result, these rights cannot be waived, even with the employee’s consent. Therefore, an employer who grants TOIL instead of paying statutory overtime-related compensation may still be exposed to claims for unpaid amounts, notwithstanding that compensatory leave has already been provided. Thai courts have affirmed this principle, holding that employers remain liable for statutory payments for work performed beyond normal working hours even where substitute time off has been granted. Are There Any Exceptions? Certain categories of employees are exempt from overtime-related compensation,
September 23, 2026
Arbitration under Thai law rests on consent. Section 11 of the Arbitration Act B.E. 2545 (2002) requires an arbitration agreement to be in writing and signed by the parties. This may also be satisfied by communications, an unchallenged allegation in pleadings, or incorporation by reference to a document containing an arbitration clause. A non-signatory cannot, as a general rule, be compelled to arbitrate merely because it participated in the transaction, received a benefit, or belongs to the corporate group of a signatory. Thai law nevertheless permits arbitration agreements and awards to affect third parties indirectly in limited circumstances. Under section 24, an arbitration clause is separable from the main contract; the invalidity of the contract does not invalidate the clause. In Supreme Court Judgment No. 3918/2563, an apparent sales contract concealed a construction contract and was void under the Civil and Commercial Code. However, the concealed construction contract and written arbitration clause remained effective. The tribunal had jurisdiction, and its award was enforceable under the Arbitration Act. Under the Arbitration Act, when a claim or liability is validly transferred, the transferee is bound by the related arbitration agreement. This includes assignment, transfer of obligations, legal succession, and subrogation. Depending on the facts and contract and agency law, consent may arise through execution by an authorized agent, ratification, assumption of obligations, or conduct accepting the contract and its arbitration clause. Thai law respects separate corporate personality. The group-of-companies doctrine has no statutory basis under the Arbitration Act, while alter egos or sham allegations require compelling evidence and an identifiable legal basis. Supreme Court Judgment No. 9161/2568 illustrates the procedural treatment of non-signatories. A consultancy contract required LCIA arbitration seated in Dubai. When the employer sued a consultant and his spouse in Thailand concerning a housing loan, the court disposed of