Primary-Source Citation Index

Foreign Business Act

พระราชบัญญัติการประกอบธุรกิจของคนต่างด้าว

Restricts foreign participation in three lists of business activities (List 1 prohibited, List 2 strategic, List 3 not-yet-ready) and requires a Foreign Business Licence or BOI promotion for foreign-majority operation.

Investment Promotion Act

พระราชบัญญัติส่งเสริมการลงทุน

Empowers the Board of Investment (BOI) to grant tax holidays, land-ownership rights, and work-permit privileges to promoted activities across eight category groups. Underpins the LTR visa and BOI corporate structures.

Hotel Act

พระราชบัญญัติโรงแรม

Defines hotel operations and the licensing regime administered by Provincial Authorities and the Department of Provincial Administration. Daily rental of unlicensed accommodation (short-term Airbnb-style) is restricted under this Act.

Civil and Commercial Code

ประมวลกฎหมายแพ่งและพาณิชย์

The foundational private-law code of Thailand, covering persons, juristic acts, obligations, contracts, property, family, and succession. Amended many times since 1925, most recently to align with the Marriage Equality Act 2024.

Civil Procedure Code of Thailand

ประมวลกฎหมายวิธีพิจารณาความแพ่ง

Sets out the procedure for civil litigation in Thailand: pleadings, evidence, court fees, judgment, execution, and appeals, including the framework for small-claims and consumer cases.

Arbitration Act

พระราชบัญญัติอนุญาโตตุลาการ

Adopts the UNCITRAL Model Law framework for arbitration in Thailand. Governs arbitration agreements, tribunal constitution, awards, and the recognition and enforcement of foreign arbitral awards under the New York Convention.

Constitution of the Kingdom of Thailand

รัฐธรรมนูญแห่งราชอาณาจักรไทย

The current Constitution of Thailand, promulgated 6 April 2017. Establishes the structure of state powers, fundamental rights, duties, electoral system, and the role of independent organs and the Constitutional Court.

Penal Code (Criminal Code) of Thailand

ประมวลกฎหมายอาญา

Thailand's primary criminal code, defining offences, defences, and ranges of penalties. Notable provisions include Section 112 (lese-majeste), Section 326-333 (defamation) and the chapters on property and personal offences.

Criminal Procedure Code of Thailand

ประมวลกฎหมายวิธีพิจารณาความอาญา

Governs investigation, prosecution, bail, evidence, trial, and appeal in criminal matters. Amended in 2019 to add anti-SLAPP provisions (Section 161/1) protecting defendants from abusive private criminal complaints.

Act on Computer-Related Offences

พระราชบัญญัติว่าด้วยการกระทำความผิดเกี่ยวกับคอมพิวเตอร์

Criminalises unauthorised access, data interference, system disruption, and the import of false data damaging to security; amended in 2017. Frequently invoked alongside criminal-defamation complaints.

Personal Data Protection Act

พระราชบัญญัติคุ้มครองข้อมูลส่วนบุคคล

Thailand's comprehensive data-protection statute, largely modelled on the EU GDPR. Fully in force since 1 June 2022; enforced by the Personal Data Protection Committee with administrative fines up to THB 5 million.

Labour Protection Act

พระราชบัญญัติคุ้มครองแรงงาน

Foundational employment statute covering working hours, wages, leave, severance pay, and termination protections. Amended in 2019 to increase severance ceilings and parental-leave provisions.

Act Amending the Civil and Commercial Code (Marriage Equality)

พระราชบัญญัติแก้ไขเพิ่มเติมประมวลกฎหมายแพ่งและพาณิชย์ (ความเท่าเทียมในการสมรส)

Amends the Civil and Commercial Code to recognise marriage between two persons regardless of gender, effective 22 January 2025. Confers equal rights on spouses for property, succession, adoption, and tax purposes.

Anti-Money Laundering Act

พระราชบัญญัติป้องกันและปราบปรามการฟอกเงิน

Defines predicate offences, customer due-diligence duties, and asset-forfeiture procedures administered by the Anti-Money Laundering Office (AMLO). Amended several times to expand digital-asset and beneficial-ownership scope.

Immigration Act

พระราชบัญญัติคนเข้าเมือง

Primary statute regulating entry, residence, and removal of foreigners in Thailand. Operates together with Ministerial Regulations setting visa categories and conditions, plus subsequent amendments on biometrics and reporting.

Nationality Act

พระราชบัญญัติสัญชาติ

Sets the rules for acquisition, loss, and restoration of Thai nationality, including naturalisation criteria (residence, language, income) and the by-birth and by-marriage routes.

Civil Registration Act

พระราชบัญญัติการทะเบียนราษฎร

Establishes the household registration (Tabien Baan), birth, death, and address-change registration system administered by the Department of Provincial Administration. The basis of the Yellow Tabien Baan for foreigners.

Trademark Act

พระราชบัญญัติเครื่องหมายการค้า

Establishes registration, renewal, opposition, and infringement remedies for trademarks, service marks, and certification marks under the Department of Intellectual Property.

Patent Act

พระราชบัญญัติสิทธิบัตร

Regulates the grant of invention patents, design patents, and petty patents in Thailand, including novelty, inventive step, and compulsory-licensing provisions.

Copyright Act

พระราชบัญญัติลิขสิทธิ์

Protects literary, artistic, musical, audiovisual, and computer-program works automatically on creation; provides civil and criminal remedies for infringement, including notice-and-takedown provisions added in 2015.

Land Code Promulgating Act

ประมวลกฎหมายที่ดิน

Governs land title, registration, leasehold, and the foreign-ownership prohibition (subject to specific exceptions). The chanote (Nor Sor 4 Jor) and lesser title documents are issued under this code.

Condominium Act

พระราชบัญญัติอาคารชุด

Permits foreigners to own up to 49% of the saleable floor area of a registered condominium building, subject to remittance of funds in foreign currency through a Thai bank.

Land and Building Tax Act

พระราชบัญญัติภาษีที่ดินและสิ่งปลูกสร้าง

Replaced the old house and land tax and local development tax. Imposes annual rates on agricultural, residential, commercial, and vacant land based on appraised value, with progressive bands and exemptions.

Revenue Code of Thailand

ประมวลรัษฎากร

The principal taxation statute, covering personal income tax, corporate income tax, VAT, specific business tax, and stamp duty. Recently relevant Revenue Department orders include Por. 161/2566 and Por. 162/2566 on foreign-sourced income.

Inheritance Tax Act

พระราชบัญญัติภาษีการรับมรดก

Imposes a 5%–10% tax on inheritances exceeding THB 100 million per beneficiary. Administered by the Revenue Department with assets categorised under five heads (immovable property, securities, deposits, vehicles, financial assets).