Law
Scope of Regulation
ประมวลกฎหมายแพ่งและพาณิชย์ บรรพ 3 ลักษณะ 22 หุ้นส่วนและบริษัท (Civil and Commercial Code, Book 3, Chapter 22, Partnerships and Companies)
Serves as the primary corporate statute, regulating the incorporation, operational management, share capital parameters, and liquidation of partnerships and private limited companies.
พระราชบัญญัติการประกอบธุรกิจของคนต่างด้าว พ.ศ. ๒๕๔๒ (Foreign Business Act B.E. 2542)
Imposes strict controls and statutory limitations on foreign equity ownership, categorizes restricted business sectors into distinct schedules, and establishes the parameters for securing Foreign Business Licenses (FBL) or Certificates (FBC).
พระราชบัญญัติส่งเสริมการลงทุน พ.ศ. ๒๕๒๐ (Investment Promotion Act B.E. 2520)
Provides the statutory foundation for the Board of Investment (BOI), regulating the granting of operational tax holidays, import duty exemptions, and enhanced foreign land-ownership rights for prioritized asset classes.
พระราชบัญญัติ การบัญชี พ.ศ. ๒๕๔๓ (Accounting Act B.E. 2543)
Codifies mandatory statutory bookkeeping rules, defines the legal qualifications required for local corporate accountants, and establishes strict financial statement preparation and filing deadlines.
The legal framework of Thailand relies on a strict hierarchy of written legal sources that establish the regulatory boundaries for administrative, commercial, and civil relationships.
Legislative authority is vested in the National Assembly (Parliament), a bicameral legislature comprising the House of Representatives and the Senate. Draft bills governing commercial activities, corporate law, and fiscal reforms are initially structured by the competent ministries and the Cabinet, subject to mandatory approval by both houses of Parliament and formal royal assent by the King of Thailand.
The primary sources of law within the jurisdiction comprise the following categories, structured in descending order of statutory authority:
| Source of Law | Description |
| Constitution (Ratthathammanun) | The supreme law of the state. All enacted codes, statutes, and ministerial regulations must strictly align with its mandates. The current Constitution was enacted in 2017. |
| Codified Laws (Pramuan Kotmai) | Systematically consolidated codes regulating entire legal sectors. The core frameworks governing commercial operations are the Civil and Commercial Code, the Revenue Code, and the Labor Protection Act. |
| Acts of Parliament (Phra Ratchabบัญญัติ) | Primary statutes enacted by the National Assembly to regulate specific economic and commercial spheres, such as the Foreign Business Act and the Investment Promotion Act. |
| Royal Decrees (Phra Ratchakritsadika) | Statutory instruments issued by the Cabinet in the name of the King for executive governance, adjustments to tax thresholds, or the establishment of specialized economic zones. |
| Ministerial Regulations (Kot Krasuang) | Enactments issued by competent ministries (such as the Ministry of Commerce, Ministry of Finance, or Ministry of Labour) to detail operational clauses and execute primary statutes. |
| Local Regulations | Enactments issued by municipal administrations (e.g., the Bangkok Metropolitan Administration or Pattaya City) to govern local levies, zoning laws, and commercial development codes. |
| International Agreements | Bilateral and multilateral treaties—including ASEAN integration frameworks, Double Taxation Agreements (DTAs), and bilateral investment treaties—formally ratified by Parliament and integrated into national legislation. |
Alternative dispute resolution is administered through: The Thai Arbitration Institute (TAI), The Thailand Arbitration Center (THAC), or International Arbitration Hubs (e.g., SIAC in Singapore, ICC), whose decisions are recognized and can be enforced through domestic courts, subject to standard statutory verification according to the 1958 New York Convention.
A critical unique operational risk in Thailand is the statutory application of criminal liability for defamation and the protection of business reputation. Unlike conventional Western legal practices where corporate conflicts remain strictly within civil law parameters, any public criticism, negative online review, or public disclosure regarding a Thai contractor, business partner, or terminated employee can immediately trigger criminal prosecution against company directors, carrying a real risk of arrest and imprisonment.
Thai corporate law mandates rigorous operational transparency:
Serves as the primary codified fiscal framework, governing the assessment and collection of core direct and indirect taxes, including Corporate Income Tax (CIT), Value Added Tax (VAT), Withholding Tax (WHT), and Specific Business Tax (SBT).
Regulates the statutory taxation and compliance mandates for inherited assets within the territory of Thailand.
Imposes an annual property tax assessed on the government-appraised value of land and structures, determined by its specific commercial or residential utilization.
Empowers the Board of Investment (BOI) to grant approved foreign-owned corporate entities statutory exemptions from Corporate Income Tax for up to 13 years.
For multinational enterprise groups, fiscal liabilities depend directly on whether they are legally deemed to be carrying on business in Thailand or deriving income from Thai sources. Targeted fiscal exemptions and incentives are accessible through the strategic frameworks of the Board of Investment (BOI) and other specialized economic regimes.
The tax legislation of Thailand is fully integrated with global transparency standards, strictly conforming to the OECD BEPS framework and international anti-base erosion (Pillar Two) compliance mandates.
The primary oversight bodies for corporate financial reporting are the Federation of Accounting Professions (TFAC) and the Department of Business Development (DBD).
Accounting records must comply with the Thailand Financial Reporting Standards (TFRS), which are systematically harmonized with International Financial Reporting Standards (IFRS).
Regulatory control over corporate data integrity is enforced via a mandatory dual-filing compliance structure: annual financial statements must undergo an independent statutory audit by a licensed Thai auditor, be formally submitted to the DBD, and concurrently filed with the Revenue Department as a mandatory attachment to the annual corporate income tax return.
Corporate clients are legally required to fully disclose the complete chain of beneficial ownership. Legitimate proof regarding the source of capital and the exact nature of commercial operations must be provided. The deployment of hidden or artificial nominee arrangements to bypass the foreign equity restrictions of the Foreign Business Act (FBA) is strictly prosecuted. Enforcement actions are directed jointly by the Department of Business Development (DBD) and AMLO. The ownership structure must remain fully transparent and backed by verified banking logs across all phases of company incorporation and annual maintenance (Know Your Customer (KYC) audits and economic substance evaluations).
Thai commercial banks and financial institutions deploy automated systems to systematically scan all cross-border wire transfers and large domestic cash transactions. Compliance desks immediately freeze outward and inward transfers that deviate from the company’s registered business profile, breach standard thresholds, or lack evident economic sense. Under statutory mandates, banks must classify anomalous transactions as suspicious and report them directly to AMLO. Corporate accounts remain locked until the client submits comprehensive primary documentation, including matching invoices, executed trade contracts, and capital origin certificates.
Failure to satisfy AML/CFT compliance parameters or provide validated share capital proof results in an immediate rejection of corporate registration by the DBD. Active entities face compulsory strike-off from the corporate registry, the immediate freezing of all operational bank accounts, and severe personal criminal liability for authorized company directors.
Department of Business Development (DBD)
Ministry of Commerce
Thailand Board of Investment (BOI)
The Revenue Department
Bank of Thailand (BOT)
The Thai Chamber of Commerce
Federation of Accounting Professions (TFAC)
Yes. Thailand executes the automatic exchange of financial information as a member of the OECD Global Forum and a signatory to the Multilateral Competent Authority Agreement (MCAA).
Under the Common Reporting Standard (CRS), Thai commercial banks are legally mandated to upload non-resident personal and corporate account data to the Revenue Department annually. This data is automatically transmitted to the tax authorities of the account holders’ home jurisdictions each September.
Transmitted data includes the holder’s full name, address, account number, year-end balance, and the gross amount of passive income generated (such as investment yields, interest, and dividends). Banks do not transmit daily transaction histories, payment descriptions, total corporate turnover, or purchasing data.
Absent a valid written arbitration clause in the contract, commercial disputes between foreign and local entities are adjudicated by the Courts of First Instance.
If the conflict arises directly from import/export terms, logistics, freight, or trademark and patent infringement, the case falls under the jurisdiction of the specialized Central Intellectual Property and International Trade Court (IP&IT Court) in Bangkok, which applies expedited procedures adapted to international commercial standards.
Judgments rendered by foreign state courts are not directly enforceable within Thailand; a new lawsuit must be formally initiated in a Thai court. However, awards issued by international commercial arbitration tribunals (such as SIAC in Singapore or the ICC) are officially recognized by Thai courts and subject to compulsory enforcement, as Thailand is a signatory to the 1958 New York Convention.
The Thai legal system is unified across the country. However, statutory law permits the application of Islamic legal principles strictly within specified southern border provinces exclusively for the resolution of matrimonial, family, and inheritance disputes, provided that all litigating parties are Muslims. These exceptions do not apply to corporate operations, foreign direct investments, or international trade.
