Thai Legal System Explained: A Complete Guide to Thailand’s Civil Law Framework

Reviewed by Wichuda Atthamethakon, LL.M., Thai Bar Licence 3149/2556, for ThaiLawOnline, a Thai law firm acting for foreigners since 2006.

You’re a Canadian business owner expanding to Thailand. You’ve signed a supply contract with a local manufacturer. Six months in, the company stops delivering. You want to sue. But before you hire a lawyer, you realize you don’t understand how Thai courts work. You’ve never dealt with a civil law system. You don’t know if judges will hear your case fairly, how long it will take, or what the rules are.

This scenario plays out hundreds of times a year. Foreigners operating in Thailand face a legal system fundamentally different from Western common law countries. Understanding the Thai legal system isn’t optional if you’re doing business, buying property, or settling here long-term.

This guide explains how Thailand’s civil law framework works, how courts operate, what the major laws are, and what foreign nationals need to know. By the end, you’ll understand your legal options and how to protect yourself in Thailand.

What Is the Thai Legal System Based On?

The Thai legal system rests on a civil law foundation. Written statutes are the principal source of law. A core private-law statute is the Thai Civil and Commercial Code. Books I and II were first promulgated in 1923 (B.E. 2466) and replaced by revised provisions in 1925 (B.E. 2468); the other books followed in stages.

Unlike the US or UK, where court decisions create binding precedent, judges in Thailand apply and interpret a comprehensive legal code. Their job is to resolve disputes by applying the code to the facts. Their decisions don’t bind future cases.

Civil Law Tradition

Civil law originated in Roman law and developed through continental Europe. It assumes that legal principles can be organized into a logical, comprehensive code. The code is the law. Statutes are primary; judicial decisions are interpretive.

Thailand adopted civil law because it provided a clean, modern framework for a developing nation. The system works well for straightforward disputes. It’s efficient when the law is clear. But it can struggle with novel situations that don’t fit existing code sections.

Historical Roots: French, German, and Japanese Influences

Thailand’s civil code didn’t emerge in isolation. It reflects influences from three major legal traditions.

The primary influence came from French civil law. Thailand’s code structure, contract principles, and family law all show French fingerprints. In the late 1800s, as European powers colonized Southeast Asia, Thailand adopted French legal concepts to modernize and avoid colonization itself.

German law also shaped Thai law, particularly in criminal procedure and commercial regulation. German jurisprudence is rigorous and systematic. You see this in Thai law’s careful classification of contract types and strict rules for written agreements.

Japanese influence arrived during World War II and the post-war period. Japanese law is another civil law system, and Japanese advisors helped Thailand refine commercial and property rules.

The result is a legal system that’s European in structure but adapted to Thai society, history, and governance.

The Constitution and Sources of Law

Thailand has had multiple constitutions. The current Constitution came into effect in 2017. It establishes the framework for government, defines rights and duties, and sets the hierarchy of legal authority.

The sources of Thai law, in order of authority, are:

1. The Constitution. the supreme law. All other laws must conform.
2. Statutes (Acts). laws passed by the National Assembly. The Civil and Commercial Code is a major statute.
3. Subsidiary Legislation (Ministerial Regulations, Royal Decrees). rules issued under authority of a statute.
4. Court Precedent and Judicial Reasoning. not binding, but highly persuasive, especially Supreme Court decisions.
5. Custom and Practice. where no written provision applies, Section 4 of the Civil and Commercial Code sends the court to local custom, then to the closest analogous provision, then to general principles of law.

This hierarchy matters. A regulation that contradicts a statute is invalid. A court judgment that contradicts the Constitution can be challenged. Understanding this pyramid helps you assess the weight of any rule you encounter.

The law behind this page

English

Section 4

Application of the law.

Full text

The law must be applied in all cases that fall within the letter or the spirit of any of its provisions. Where no provision of law is applicable to a case, it shall be decided according to local custom. In the absence of such custom, the case shall be decided by analogy to the provision of law most nearly applicable, and, in the absence of such a provision as well, according to the general principles of law.

ThaiLawOnline translation

Our annotated sectionOfficial text

Section 5 Constitution of the Kingdom of Thailand B.E. 2560

Full text

The Constitution is the supreme law of the country. Any provision of law, rule or regulation, or any act, that is contrary to or inconsistent with the Constitution is unenforceable. Where no provision of this Constitution applies to a case, the act shall be done or the case decided in accordance with the customary practice of government of Thailand under the democratic system with the King as Head of State.

ThaiLawOnline translation

Official text

Section 145

A judgment or order binds the parties from the date it is given until it is changed, reversed, or set aside. It generally does not bind third persons who were not parties, except in specific cases such as judgments on a person's status or capacity and dissolution or bankruptcy orders, which third persons may invoke and which may be used against them, and ownership rulings, which may be used against third persons unless the third person proves a better right.

Full text

Subject to the provisions of this Code on appeal, further appeal, and new trial, any judgment or order shall be deemed to bind the parties to the proceedings of the court that gave the judgment or made the order, from the date it was given or made until the date the judgment or order is changed, amended, reversed, or set aside, if that occurs. Even though the court has stated in general terms that the judgment is to be enforced against a third person who was not a party to the proceedings, that judgment or order does not bind the third person, except as provided in Section 142 (1), Section 245, and Section 366, and in the following cases: (1) a judgment concerning the status or capacity of a person, a judgment ordering the dissolution of a juristic person, or an order in bankruptcy may be invoked by or against third persons; (2) a judgment deciding the ownership of any property in favour of one of the parties may be used against a third person, except where the third person can prove that he has a better right.

ThaiLawOnline translation

Our annotated sectionOfficial text

Section 194 Constitution of the Kingdom of Thailand B.E. 2560

Full text

The Courts of Justice have the power to try and adjudicate all cases, except cases that the Constitution or the law places within the jurisdiction of another court. The establishment, procedure and operation of the Courts of Justice shall be in accordance with the law on that matter.

ThaiLawOnline translation

Official text

Section 197 Constitution of the Kingdom of Thailand B.E. 2560

Full text

The Administrative Courts have the power to try and adjudicate administrative cases arising from the exercise of administrative power under the law or from the conduct of administrative activities, as provided by law. There shall be a Supreme Administrative Court and Administrative Courts of First Instance. The jurisdiction of the Administrative Courts under paragraph 1 does not include decisions of independent organs made in the direct exercise of powers under the Constitution of those independent organs. The establishment, procedure and operation of the Administrative Courts shall be in accordance with the law on that matter.

ThaiLawOnline translation

Official text

Section 229

An appeal must be in writing, filed with the trial court within one month of the judgment being read. At the same time, the appellant must deposit with the court the fees that the judgment orders payable to the other party, and file a copy of the appeal for service on the appellee.

Full text

An appeal shall be made in writing and filed with the court of first instance that rendered the judgment or order, within one month from the date on which the judgment or order was read. The appellant must also deposit with the court, together with the appeal, the amount of the fees payable to the other party under the judgment or order. The appellant shall file a copy of the appeal with the court for service on the appellee (that is, the original plaintiff or defendant who did not appeal from the case), as provided in Sections 235 and 236.

ThaiLawOnline translation

Our annotated sectionOfficial text

Section 247

You cannot dika to the Supreme Court as of right. You must obtain the Supreme Court's leave by filing a leave application together with your dika at the trial court within one month of the appeal judgment being read. The trial court then forwards it to the Supreme Court, which rules promptly.

Full text

A dika against a judgment or order of the Court of Appeal may be made only when leave has been granted by the Supreme Court. An application for leave to dika shall be filed, together with the petition of dika, with the court of first instance that gave the judgment or order in the case, within one month from the day the judgment or order of the Court of Appeal was read. The court of first instance shall promptly forward the application together with the petition of dika to the Supreme Court, and the Supreme Court shall consider and decide the application without delay.

ThaiLawOnline translation

Our annotated sectionOfficial text

Section 86 Limitation of Aliens Right in Land

Full text

An alien may acquire land only by virtue of the provisions of a treaty which provides that ownership of immovable property may be held, and subject also to the provisions of this Code. Subject to section 84, such an alien may acquire land for residential, commercial, industrial, agricultural, cemetery, public charity or religious purposes only in accordance with the conditions and procedure prescribed by ministerial regulation, and permission must be obtained from the Minister.

Unofficial translation by the Office of the Council of State

Our annotated sectionOfficial text

ไทย

มาตรา 4

ข้อความเต็ม

กฎหมายนั้น ต้องใช้ในบรรดากรณีซึ่งต้องด้วยบทบัญญัติใด ๆ แห่งกฎหมายตามตัวอักษร หรือตามความมุ่งหมายของบทบัญญัตินั้น ๆ เมื่อไม่มีบทกฎหมายที่จะยกมาปรับคดีได้ ให้วินิจฉัยคดีนั้นตามจารีตประเพณีแห่งท้องถิ่น ถ้าไม่มีจารีตประเพณีเช่นว่านั้น ให้วินิจฉัยคดีอาศัยเทียบบทกฎหมายที่ใกล้เคียงอย่างยิ่ง และถ้าบทกฎหมายเช่นนั้นก็ไม่มีด้วย ให้วินิจฉัยตามหลักกฎหมายทั่วไป

ตรงตามข้อความในราชกิจจานุเบกษา / สำนักงานคณะกรรมการกฤษฎีกา (Verbatim from the Royal Gazette / Office of the Council of State)

มาตราพร้อมหมายเหตุของเราข้อความทางการ

มาตรา 5 รัฐธรรมนูญแห่งราชอาณาจักรไทย พ.ศ. 2560

ข้อความเต็ม

รัฐธรรมนูญเป็นกฎหมายสูงสุดของประเทศ บทบัญญัติใดของกฎหมาย กฎหรือข้อบังคับ หรือการกระทำใด ขัดหรือแย้งต่อรัฐธรรมนูญ บทบัญญัติหรือการกระทำนั้นเป็นอันใช้บังคับมิได้ เมื่อไม่มีบทบัญญัติแห่งรัฐธรรมนูญนี้บังคับแก่กรณีใด ให้กระทำการนั้นหรือวินิจฉัยกรณีนั้นไปตามประเพณีการปกครองประเทศไทยในระบอบประชาธิปไตยอันมีพระมหากษัตริย์ทรงเป็นประมุข

ตรงตามข้อความในราชกิจจานุเบกษา / สำนักงานคณะกรรมการกฤษฎีกา (Verbatim from the Royal Gazette / Office of the Council of State)

ข้อความทางการ

มาตรา 145

ข้อความเต็ม

ภายใต้บังคับบทบัญญัติแห่งประมวลกฎหมายนี้ว่าด้วยการอุทธรณ์ฎีกา และการพิจารณาใหม่ คำพิพากษาหรือคำสั่งใด ๆ ให้ถือว่าผูกพันคู่ความในกระบวนพิจารณาของศาลที่พิพากษาหรือมีคำสั่ง นับตั้งแต่วันที่ได้พิพากษาหรือมีคำสั่ง จนถึงวันที่คำพิพากษาหรือคำสั่งนั้นได้ถูกเปลี่ยนแปลง แก้ไข กลับหรืองดเสีย ถ้าหากมีถึงแม้ศาลจะได้กล่าวไว้โดยทั่วไปว่าให้ใช้คำพิพากษาบังคับแก่บุคคลภายนอกซึ่งมิได้เป็นคู่ความในกระบวนพิจารณาของศาลด้วยก็ดี คำพิพากษาหรือคำสั่งนั้นย่อมไม่ผูกพันบุคคลภายนอก เว้นแต่ที่บัญญัติไว้ในมาตรา ๑๔๒ (๑) มาตรา ๒๔๕ และมาตรา ๓๖๖ และในข้อต่อไปนี้ (๑) คำพิพากษาเกี่ยวด้วยฐานะหรือความสามารถของบุคคล หรือคำพิพากษาสั่งให้เลิกนิติบุคคล หรือคำสั่งเรื่องล้มละลายเหล่านี้ บุคคลภายนอกจะยกขึ้นอ้างอิงหรือจะใช้ยันแก่บุคคลภายนอกก็ได้ (๒) คำพิพากษาที่วินิจฉัยถึงกรรมสิทธิ์แห่งทรัพย์สินใด ๆ เป็นคุณแก่คู่ความฝ่ายใดฝ่ายหนึ่งอาจใช้ยันแก่บุคคลภายนอกได้ เว้นแต่บุคคลภายนอกนั้นจะพิสูจน์ได้ว่าตนมีสิทธิดีกว่า

ตรงตามข้อความในราชกิจจานุเบกษา / สำนักงานคณะกรรมการกฤษฎีกา (Verbatim from the Royal Gazette / Office of the Council of State)

มาตราพร้อมหมายเหตุของเราข้อความทางการ

มาตรา 194 รัฐธรรมนูญแห่งราชอาณาจักรไทย พ.ศ. 2560

ข้อความเต็ม

ศาลยุติธรรมมีอำนาจพิจารณาพิพากษาคดีทั้งปวง เว้นแต่คดีที่รัฐธรรมนูญหรือกฎหมายบัญญัติให้อยู่ในอำนาจของศาลอื่น การจัดตั้ง วิธีพิจารณาคดี และการดำเนินงานของศาลยุติธรรมให้เป็นไปตามกฎหมายว่าด้วยการนั้น

ตรงตามข้อความในราชกิจจานุเบกษา / สำนักงานคณะกรรมการกฤษฎีกา (Verbatim from the Royal Gazette / Office of the Council of State)

ข้อความทางการ

มาตรา 197 รัฐธรรมนูญแห่งราชอาณาจักรไทย พ.ศ. 2560

ข้อความเต็ม

ศาลปกครองมีอำนาจพิจารณาพิพากษาคดีปกครองอันเนื่องมาจากการใช้อำนาจทางปกครองตามกฎหมายหรือเนื่องมาจากการดำเนินกิจการทางปกครอง ทั้งนี้ ตามที่กฎหมายบัญญัติ ให้มีศาลปกครองสูงสุดและศาลปกครองชั้นต้น อำนาจศาลปกครองตามวรรคหนึ่ง ไม่รวมถึงการวินิจฉัยชี้ขาดขององค์กรอิสระซึ่งเป็นการใช้อำนาจโดยตรงตามรัฐธรรมนูญขององค์กรอิสระนั้น ๆ การจัดตั้ง วิธีพิจารณาคดี และการดำเนินงานของศาลปกครองให้เป็นไปตามกฎหมายว่าด้วยการนั้น

ตรงตามข้อความในราชกิจจานุเบกษา / สำนักงานคณะกรรมการกฤษฎีกา (Verbatim from the Royal Gazette / Office of the Council of State)

ข้อความทางการ

มาตรา 229

ข้อความเต็ม

การอุทธรณ์นั้นให้ทำเป็นหนังสือยื่นต่อศาลชั้นต้นซึ่งมีคำพิพากษาหรือคำสั่งภายในกำหนดหนึ่งเดือนนับแต่วันที่ได้อ่านคำพิพากษาหรือคำสั่งนั้น และผู้อุทธรณ์ต้องนำเงินค่าธรรมเนียมซึ่งจะต้องใช้แก่คู่ความอีกฝ่ายหนึ่งตามคำพิพากษาหรือคำสั่งมาวางศาลพร้อมกับอุทธรณ์นั้นด้วย ให้ผู้อุทธรณ์ยื่นสำเนาอุทธรณ์ต่อศาล เพื่อส่งให้แก่จำเลยอุทธรณ์ (คือฝ่ายโจทก์หรือจำเลยความเดิมซึ่งเป็นฝ่ายที่มิได้อุทธรณ์ความนั้น) ตามที่บัญญัติไว้ในมาตรา ๒๓๕ และ ๒๓๖

ตรงตามข้อความในราชกิจจานุเบกษา / สำนักงานคณะกรรมการกฤษฎีกา (Verbatim from the Royal Gazette / Office of the Council of State)

มาตราพร้อมหมายเหตุของเราข้อความทางการ

มาตรา 247

ข้อความเต็ม

การฎีกาคำพิพากษาหรือคำสั่งของศาลอุทธรณ์ ให้กระทำได้เมื่อได้รับอนุญาตจากศาลฎีกา การขออนุญาตฎีกา ให้ยื่นคำร้องพร้อมกับคำฟ้องฎีกาต่อศาลชั้นต้นที่มีคำพิพากษาหรือคำสั่งในคดีนั้นภายในกำหนดหนึ่งเดือนนับแต่วันที่ได้อ่านคำพิพากษาหรือคำสั่งของศาลอุทธรณ์ แล้วให้ศาลชั้นต้นรีบส่งคำร้องพร้อมคำฟ้องฎีกาดังกล่าวไปยังศาลฎีกา และให้ศาลฎีกาพิจารณาวินิจฉัยคำร้องให้เสร็จสิ้นโดยเร็ว

ตรงตามข้อความในราชกิจจานุเบกษา / สำนักงานคณะกรรมการกฤษฎีกา (Verbatim from the Royal Gazette / Office of the Council of State)

มาตราพร้อมหมายเหตุของเราข้อความทางการ

มาตรา 86

ข้อความเต็ม

คนต่างด้าวจะได้มาซึ่งที่ดินก็โดยอาศัยบทสนธิสัญญาซึ่งบัญญัติให้มีกรรมสิทธิ์ในอสังหาริมทรัพย์ได้ และอยู่ในบังคับบทบัญญัติแห่งประมวลกฎหมายนี้ด้วย ภายใต้บังคับมาตรา ๘๔ คนต่างด้าวดังกล่าวจะได้มาซึ่งที่ดินเพื่อใช้เป็นที่อยู่อาศัย ประกอบกิจการในทางพาณิชยกรรม อุตสาหกรรม เกษตรกรรม การสุสาน การกุศลสาธารณะ หรือการศาสนา ต้องเป็นไปตามเงื่อนไขและวิธีการซึ่งกำหนดโดยกฎกระทรวง และต้องได้รับอนุญาตจากรัฐมนตรี

ตรงตามข้อความในราชกิจจานุเบกษา / สำนักงานคณะกรรมการกฤษฎีกา (Verbatim from the Royal Gazette / Office of the Council of State)

มาตราพร้อมหมายเหตุของเราข้อความทางการ

Français

Article 4

La loi s'applique selon sa lettre ou son esprit. À défaut de texte, le juge statue selon la coutume locale, puis par analogie avec la disposition la plus proche, et enfin selon les principes généraux du droit.

résumé non officiel

Notre article annotéTexte officiel

Article 5 Constitution of the Kingdom of Thailand B.E. 2560

La Constitution est la loi suprême: toute disposition ou tout acte contraire est inapplicable. À défaut de disposition constitutionnelle, on statue selon la coutume de gouvernement de la Thaïlande, sous le régime démocratique ayant le Roi pour chef de l'État.

résumé non officiel

Texte officiel

Article 145

Sous réserve des voies de recours, le jugement lie les parties jusqu'à sa modification. Il ne lie pas les tiers, sauf articles 142 (1), 245 et 366, jugements d'état, de capacité, de dissolution ou de faillite, et jugements sur la propriété, sauf droit meilleur prouvé par le tiers.

résumé non officiel

Notre article annotéTexte officiel

Article 194 Constitution of the Kingdom of Thailand B.E. 2560

Les tribunaux judiciaires jugent toutes les affaires, sauf celles que la Constitution ou la loi attribue à un autre tribunal; leur organisation, leur procédure et leur fonctionnement sont régis par la loi applicable.

résumé non officiel

Texte officiel

Article 197 Constitution of the Kingdom of Thailand B.E. 2560

Les tribunaux administratifs, Cour suprême administrative et tribunaux de première instance, jugent les litiges nés de l'exercice du pouvoir administratif ou d'activités administratives, sauf les décisions prises par les organes indépendants en vertu directe de la Constitution.

résumé non officiel

Texte officiel

Article 229

L'appel est formé par écrit devant le tribunal de première instance dans le mois de la lecture de la décision; l'appelant consigne avec l'appel les frais dus à l'adversaire et dépose une copie de l'appel pour signification à l'intimé, selon les articles 235 et 236.

résumé non officiel

Notre article annotéTexte officiel

Article 247

Le pourvoi contre une décision de la Cour d'appel exige l'autorisation de la Cour suprême, demandée avec le pourvoi devant le tribunal de première instance dans le mois de la lecture; celui-ci transmet sans délai et la Cour suprême statue promptement.

résumé non officiel

Notre article annotéTexte officiel

Article 86

Un étranger ne peut acquérir un terrain qu'en vertu des dispositions d'un traité qui permet d'avoir la propriété d'un bien immobilier, et sous réserve également des dispositions du présent Code. Sous réserve de l'article 84, cet étranger ne peut acquérir un terrain à usage d'habitation, d'activité commerciale, industrielle ou agricole, de cimetière, de bienfaisance publique ou de culte que conformément aux conditions et à la procédure fixées par règlement ministériel, et il doit obtenir l'autorisation du Ministre.

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Sources

• Civil and Commercial Code, Office of the Council of State, retrieved 31 October 2026
• Constitution of the Kingdom of Thailand B.E. 2560, retrieved 2 November 2026
• Civil Procedure Code, Office of the Council of State, retrieved 31 October 2026
• Land Code, Office of the Council of State, retrieved 31 October 2026

Civil Law vs Common Law: What Western Clients Need to Know

If you’re from North America, Australia, or the UK, you’re accustomed to common law. The differences between civil law and common law aren’t academic. They affect how disputes are resolved, how courts operate, and what strategy your lawyer uses.

No Binding Precedent

In common law systems, a decision by a higher court binds lower courts. If the Supreme Court of Canada rules on a contract issue, all Canadian courts must follow that precedent. Precedent is the engine of the legal system.

Thailand works differently. A Supreme Court decision is persuasive. Judges read it carefully. But it doesn’t bind other judges. Each judge applies the code independently. Two judges can interpret the same statute differently and both be “correct.”

Why does this matter to you? Your case doesn’t benefit from a line of favorable precedent. If a Supreme Court judge ruled your way last year, the court hearing your case today can ignore that decision. You must argue your case on the merits of the code itself, not on what courts have done before.

No Jury Trials

The Thai system has no jury. A professional judge hears your case, evaluates evidence, and decides. This surprises Americans accustomed to jury trials in civil cases.

In practice, this is often favorable for business disputes. Judges understand contract law. They don’t get confused by emotional appeals. They focus on the written agreement and statutory rules. Your lawyer argues to a trained legal mind, not twelve citizens.

The downside: you can’t use jury psychology. You can’t tell a compelling narrative designed to move ordinary people. You must lay out the legal rules and facts precisely.

Inquisitorial vs Adversarial Elements

Common law is highly adversarial. The two sides present evidence. The judge acts as a neutral referee. Discovery rules let each side investigate the other’s documents and testimony. The side that prepares better usually wins.

Civil law systems are more inquisitorial. The judge takes a more active role in investigating facts. The judge can request documents directly from the parties. The judge can question witnesses closely. The judge isn’t a passive referee.

Thai courts blend both approaches. The judge isn’t fully inquisitorial like a French court. Thai procedure does require parties to exchange some documents. But discovery is narrower than in the US. You won’t get months of depositions and endless document requests.

This matters for strategy. You can’t rely on discovery to surprise your opponent with damaging documents in trial. You must gather evidence upfront. Your lawyer needs all facts before filing suit.

How This Affects Your Case

Here’s a concrete example. You have a contract dispute with a Thai company. The contract says disputes are governed by Thai law and Thai courts.

In the US, your lawyer would spend months on discovery. You’d depose the opposing company’s manager. You’d request every email mentioning the contract. You’d hire an expert to show the company breached. Then you’d go to trial with a jury.

In Thailand, the process is faster but less investigative. You file a complaint. You attach all documents you have. The court may ask the other side for specific documents. There are no depositions. The trial is shorter. The judge reads the contract, listens to both sides, and decides based on the code.

The advantage: litigation is faster and cheaper. The disadvantage: you need solid evidence before you sue. If the smoking gun email is buried in your opponent’s files, you may never find it.

Feature	Common Law (US, Canada, UK)	Civil Law (Thailand)
Primary Source of Law	Court decisions (case law)	Written statutes (codes)
Binding Precedent	Yes, higher courts bind lower courts	No, persuasive but not binding
Juries in Civil Cases	Yes (in US and some common law nations)	No, always judge only
Discovery Process	Extensive depositions and document requests	Limited, court-directed
Judge’s Role	Neutral referee	Active investigator and decider
Case Management	Party-driven, lengthy pre-trial	Court-managed, faster track to trial
Burden on Plaintiff	Prove by preponderance of evidence	Prove by preponderance of evidence
Emphasis in Arguments	Legal strategy, persuasion, precedent	Statutory interpretation, code application

Structure of Thai Courts

Thailand’s court system is hierarchical. Different courts handle different types of cases. Understanding this structure is essential if you’re filing suit or defending a claim.

Courts of Justice: Three Tiers

The main court system is called the Courts of Justice. It operates under the Statute of the Courts of Justice B.E. 2543 (2000). There are three tiers.

Supreme Court (Dika)

The highest court in the system. Handles appeals from the Court of Appeal only. Focuses on legal principles and whether lower courts applied the law correctly. Usually doesn’t re-examine facts. Located in Bangkok.

Courts of Appeal (Appellate Courts)

Regional courts that review decisions from the trial courts. Located in major cities (Bangkok, Chiang Mai, Khon Kaen, Nakhon Ratchasima, Songkhla). Can examine facts and law. Can reverse trial court decisions.

Lower Courts (District and Provincial Courts)

These are trial courts where cases begin. In Bangkok, cases begin in the Civil Courts and Criminal Courts; elsewhere in the Provincial Court of each province. District (Kwaeng) Courts in both handle small cases: civil claims up to 300,000 baht and offences punishable by up to three years or a 60,000 baht fine. These courts hear evidence, determine facts, and apply the law.

Administrative Courts

Administrative courts handle disputes between citizens and government agencies. If you contest a business licence denial or a regulation, you file in the Administrative Court, not the regular courts. A tax assessment goes to the Tax Court, after the Revenue Department’s own objection procedure.

The Administrative Court system has two tiers: the Administrative Courts of first instance (the Central Administrative Court and the regional courts) and the Supreme Administrative Court. Rules are specialized.

Constitutional Court

The Constitutional Court reviews whether laws and government actions conform to the Constitution. Most cases reach it through referrals from other courts or petitions by state bodies, but a person whose constitutional rights or liberties are violated may petition it directly under section 213 of the Constitution, subject to the conditions of the Organic Act on its procedure.

Military Courts

Military courts handle crimes involving soldiers. They’re rare for foreign civilians unless you’re involved in a serious crime during military rule.

Specialized Courts

Thailand has specialized courts for specific matters:

Specialized Court	Jurisdiction
Intellectual Property and International Trade (IP&IT)	Patent, trademark, copyright, trade secret, unfair competition cases
Labor Court	Disputes between employers and employees, wrongful termination, wage claims
Tax Court	Disputes with the Revenue Department over assessments and penalties
Bankruptcy Court	Insolvency, debt restructuring, receivership proceedings
Family and Juvenile Court	Divorce, custody and other family cases, child protection, juvenile offenses. See our Thai family law guide.

If your case falls within a specialized court’s jurisdiction, it must be filed there. You can’t choose the regular court instead.

The Thai Civil and Commercial Code

The Thai Civil and Commercial Code governs contracts, property, family law, succession and much of commercial relations. Books I and II were first promulgated on 11 November 1923 (B.E. 2466). The Royal Decree of 11 November 1925 (B.E. 2468) replaced those original provisions with revised text. The Code developed book by book and has been amended many times since.

Six Books Overview

The code is organized into six books:

• Book 1: General Principles (Sections 1-193/35). Defines legal personhood, legal capacity, domicile, names, and legal status. Covers natural persons and juristic persons (companies).
• Book 2: Obligations (Sections 194-452). Governs how obligations are created, performed, and discharged. Covers contracts, torts, unjust enrichment, and general contract principles.
• Book 3: Specific Contracts (Sections 453-1297). Detailed rules for particular contract types: sale, rent, loan, agency, employment, deposit, and partnership.
• Book 4: Property (Sections 1298-1434). Rules on ownership, possession and real rights over immovable property, such as servitude, habitation, superficies, usufruct and charges. Our Thai property law guide covers these sections in detail.
• Book 5: Family (Sections 1435-1598/41). Marriage, divorce, parental rights, guardianship, and adoption. We cover the practical side in our Thai family law overview.
• Book 6: Succession (Sections 1599-1755). Wills, intestate succession, and estate administration; section 1686 makes a trust created by will or other juristic act ineffective unless a specific law authorises it.

Key Sections Foreign Clients Encounter Most

If you’re doing business in Thailand, you’ll encounter these sections repeatedly:

Sections 354 and following (Offer and Acceptance). A contract is formed when an offer and an acceptance correspond. The code requires essential terms (price, parties, subject matter). In case of doubt, a term is interpreted in favour of the party who bears the obligation (section 11).

Section 456 (Sale of Land). A sale of immovable property is void unless it is made in writing and registered by the competent official, and an agreement to sell cannot be enforced by action unless there is written evidence signed by the party to be charged, a deposit has been given, or there has been part performance. This is critical for property transactions. An oral land sale is void.

Sections 453 and following (Sale Generally). Section 458 fixes when ownership passes, and sections 472 and 475 start the seller’s liability for defects and eviction. Risk of loss is section 370, in Book 2.

Sections 587 and following (Hire of Work). Governs contracts where one party pays another for labor or services. Construction contracts and service agreements fall here.

Book 4, Property Rights (Section 1298-1434). If you’re buying property or land, these sections define ownership, possession, encumbrances, and how title transfers.

Sections 1465 and following (Property of Husband and Wife). Married couples’ property rights and how assets are divided. Section 1468 is the narrower rule that clauses in an ante-nuptial agreement have no effect against third persons acting in good faith.

Other Major Codes You Should Know

The Civil and Commercial Code isn’t the whole story. Several specialized statutes matter for different situations:

Criminal Code B.E. 2499 (1956). Defines crimes and penalties. You don’t need to know this unless you’re charged with a crime.

Land Code B.E. 2497 (1954). Governs land registration, titles, and ownership. Foreign citizens face restrictions here. See our guide on buying property in Thailand for details.

Condominium Act B.E. 2522 (1979). Foreigners can own condominiums in Thailand (up to 49% of the total floor area of all units in the building). This Act sets the rules.

Revenue Code B.E. 2481 (1938). Governs personal and corporate income tax, VAT, specific business tax and stamp duty; land and building tax is under the separate Land and Building Tax Act B.E. 2562 (2019). If you earn income in Thailand, you pay taxes under this code.

Land Code B.E. 2497 (1954). Section 86 restricts foreign nationals from owning land. Foreigners can lease land for up to 30 years. See our article on foreign ownership restrictions in Thailand.

Thai Arbitration Act B.E. 2545 (2002). Governs arbitration agreements and awards. If your contract includes arbitration, this Act applies.

Civil Procedure Code B.E. 2477 (1934). Sets the rules for filing lawsuits, serving documents, discovery, and trial procedure.

How Civil Litigation Works in Thailand

You’re considering filing a lawsuit in Thailand. What happens? Here’s the step-by-step process.

Filing a Lawsuit

You must file a written complaint with the appropriate court. The complaint states your claim, the facts, the legal basis, and the relief you seek (usually money damages). You pay a court fee based on the amount in dispute.

Statute of Reference: Civil Procedure Code B.E. 2477, section 172.

The complaint must include:

• Parties’ full legal names and addresses
• Statement of facts (clear and specific)
• Legal grounds (which statute or contract was violated)
• Amount claimed or relief sought
• Your signature (usually through a lawyer)
• Court fee payment proof

The court fee is calculated on the damages claimed. For a money claim, Table 1 annexed to the Civil Procedure Code sets the fee at 2% of the amount claimed up to 50 million baht, capped at 200,000 baht, plus 0.1% of any part above 50 million. Relief that cannot be valued in money, such as a declaration or an injunction, costs 200 baht per matter. These fees can add up for large claims but are generally much lower than US litigation costs.

Service and Response

The court serves the defendant with your complaint. Service must be done properly under Civil Procedure Code rules. The defendant has usually 15 days to file a response and answer.

The defendant’s answer will admit or deny your allegations. The defendant may also file a counterclaim against you.

At this stage, the court may hold a preliminary conference to clarify issues and see if settlement is possible.

Discovery and Evidence Rules

Thai discovery is limited compared to US litigation. You don’t get broad rights to demand documents or depose witnesses. Instead, the judge controls what evidence is presented.

Both sides must file a list of their evidence, and copies of the documents they rely on, at least seven days before the witness hearing (CPC sections 88 and 90). This typically includes:

• Contracts and written agreements
• Business records and invoices
• Email or correspondence
• Expert reports (if claiming special damages)
• Witness statements (often in affidavit form)

The other side can request the judge to order you to produce specific documents. But you can’t serve broad document requests. Discovery is controlled and narrow.

There are usually no depositions (question-and-answer sessions before trial). You won’t be questioned under oath by opposing counsel before trial. Instead, witnesses testify at trial.

Trial Process: No Jury, Judge-Led

Your case will be assigned to a judge. Trials are public but often brief compared to US trials. Each side presents opening arguments and evidence.

The judge asks questions throughout. The judge may request additional documents or witness testimony. The judge is actively investigating, not passively listening.

Thai trials can be spread over multiple hearings. The judge may break a trial into several sessions over weeks or months. This differs from US trials, which often happen over consecutive days.

You must present all your best evidence at trial. There’s no surprise evidence at the last minute. The judge needs time to understand complex facts. Your lawyer must explain the case clearly and logically.

Judgment and Appeals

After all evidence is presented, the judge issues a written judgment. The judgment states the facts found, the law applied, and the decision. Thai judgments are often quite detailed.

If you lose, you have one month from the day the judgment is read to appeal to the Court of Appeal, not thirty days. Both Codes use the same wording: Criminal Procedure Code section 198 for criminal appeals and Civil Procedure Code section 229 for civil ones each give one month, not a count of days. The difference bites in every month of thirty-one days, because a judgment read on 31 January must be appealed by 28 February while thirty days would take you to 2 March and out of time. Unlike a US appeal, the Thai Court of Appeal may re-examine the facts, though a fact appeal is barred in the smaller criminal cases described in Criminal Procedure Code section 193 bis and in civil cases worth 50,000 baht or less under Civil Procedure Code section 224.

If you lose at the appellate level, you can petition the Supreme Court. The Supreme Court is highly selective. A civil appeal to it needs its leave (CPC section 247), granted where the question is important, for example a matter of public interest, a conflict with Supreme Court precedent, or no precedent yet (section 249). Criminal appeals to the Supreme Court follow separate rules: Criminal Procedure Code sections 216 to 221 bar many of them unless a judge in the case or the Attorney General certifies the appeal under section 221.

Enforcement of Judgments

You won a judgment. How do you collect?

An appeal does not by itself suspend enforcement (CPC section 231): the winner may enforce a first-instance judgment unless the losing party obtains a stay from the appeal court, usually by depositing the judgment sum or giving security. To enforce, you can request the court’s enforcement officer to seize the debtor’s assets or bank accounts.

The enforcement process is slower in Thailand than in the US. You can’t garnish wages easily. Judgment debtors often have ways to hide or protect assets. Enforcement is a challenge in Thailand even if the judgment is in your favor.

This is why contracts should include arbitration clauses. Arbitration awards are often easier to enforce internationally than court judgments.

Stage of Case	Typical Timeline	Cost Estimate (Simple Contract Dispute, 500k Baht Claim)
Filing to preliminary conference	1-3 months	10,000 baht (court fee: 2% of the claim)
Written pleadings and evidence exchange	3-6 months	15,000-25,000 baht (lawyer fees)
Trial hearings (first instance)	6-24 months (often spread over multiple sessions)	20,000-50,000 baht (lawyer fees)
Judgment rendered	1-3 months after final hearing	None
Appeal (optional)	12-24 months	20,000-40,000 baht (lawyer fees)
Supreme Court petition (optional)	6-12 months (if accepted)	15,000-30,000 baht (lawyer fees)
Total (from filing to final judgment)	2-5 years	80,000-155,000 baht

Alternative Dispute Resolution in Thailand

Litigation isn’t the only way to resolve disputes in Thailand. In fact, many smart businesses avoid court altogether by using arbitration or mediation.

Arbitration

Arbitration is a private process where an arbitrator (not a judge) hears the dispute and issues a binding award. Thailand has the Thai Arbitration Act B.E. 2545 (2002), which governs arbitration in Thailand and the enforcement of foreign awards.

How it works: Your contract includes an arbitration clause that says disputes will be arbitrated, not litigated. If a dispute arises, you each pick an arbitrator or agree on a panel. The arbitrator(s) hear the case and issue an award. The award is enforceable like a court judgment.

Advantages of arbitration in Thailand:

• Faster than court litigation (usually 1-2 years vs 3-5 years for court)
• Private (court cases are public)
• Arbitrator has expertise in your industry (you pick them)
• Awards are enforceable internationally under the New York Convention
• Limited appeal rights (harder to overturn an award)

International arbitration is also available through the Thailand Arbitration Center (THAC) in Bangkok.

Mediation

Mediation is a non-binding process where a mediator helps the parties negotiate a settlement. The mediator doesn’t decide the case. The mediator helps you find common ground.

Thailand has growing mediation programs. Many business contracts include a mediation clause as a first step before arbitration or litigation. The process is fast (often weeks) and cheap. If it succeeds, you avoid more expensive dispute resolution.

Mediation often works well in Thai business culture. Many Thai businesses prefer to settle rather than fight publicly. A mediator can bridge cultural differences.

When ADR Makes Sense vs Litigation

Use arbitration if:

• You expect the dispute to be significant (over 1 million baht)
• You need a faster resolution (business can’t wait 3-5 years)
• You’re working with international parties (enforcement is easier)
• You want privacy (no public court record)

Use litigation if:

• The claim is small (under 500k baht) and you want minimal cost
• You need a judicial decision (arbitration awards can be limited)
• You want a public, reasoned court judgment (an arbitral award is private)

Most sophisticated Thai contracts use a tiered approach: negotiate first, then mediate, then arbitrate.

How Thai Law Applies to Foreigners

You’re not Thai. Does Thai law apply to you? The answer is mostly yes. But you face special restrictions.

Standing and Legal Rights

Foreigners have legal standing to enter contracts and use Thai courts. Section 15 of the Thai Civil and Commercial Code provides that legal personality begins on the full completion of birth as a living child and ends at death, and it draws no distinction by nationality.

You can sue in Thai courts if you have a claim. You can be sued. You must follow Thai law when contracts are governed by Thai law.

However, you should understand that Thai courts, like courts everywhere, may favor local parties. If there’s ambiguity, judges may interpret the law in ways that protect Thai interests. This isn’t overtly biased, but it’s a reality. Hiring a skilled local Thai lawyer is essential.

Property Ownership Restrictions

Foreigners face significant restrictions on land ownership. Section 86 of the Land Code B.E. 2497 (1954) generally prohibits foreign nationals from owning land.

However, you can lease land for up to 30 years (renewable). You can own condominiums, subject to the 49% rule (foreigners together can own no more than 49% of the combined area of all the units in a building, not 49% of the number of units: Condominium Act section 19 bis). Learn more in our detailed guide on foreign ownership restrictions in Thailand.

You can own a house if it’s built on leased land. You own the structure but lease the land. A usufruct agreement is another option that gives you stronger rights than a simple lease. Many foreigners use this approach.

You can also own a house through a Thai company. A Thai company can own land only if foreigners hold no more than 49% of its capital and are no more than half of its shareholders (Land Code section 97); a company you own is treated as a foreigner. But this requires proper structure and compliance with tax and foreign investment rules. Be aware of the recent crackdowns on nominee structures before going this route.

Business Entity Requirements

If you’re running a business in Thailand, you must comply with Thailand’s business laws. You typically need one of these:

• Sole Proprietorship. You operate under your name. Simple but you’re personally liable.
• Partnership. Multiple owners, shared liability and profit.
• Limited Liability Company. A legal entity separate from owners, limiting their liability.
• Public Company. For larger businesses; more complex requirements.

Most foreign businesses use a limited liability company. You must register with the Department of Business Development and get a tax ID. You must have a Thai bank account and maintain accounting records.

Certain businesses require special licenses or have foreign ownership caps. For example, teaching foreign languages requires work permits. Owning a hotel requires foreign investment approval.

Visa requirements also matter. Many foreigners operate businesses in Thailand on a Non-B Business Visa or the newer Long Term Resident (LTR) Visa. Visa compliance is separate from business law but equally important.

Foreign Judgment Enforcement

If you have a court judgment from your home country, can you enforce it in Thailand?

The short answer is no, not directly. Thailand has no statute for recognising foreign court judgments, so the creditor has to bring a fresh action on the original claim and prove it again under Thai law. Foreign arbitral awards are the opposite: they do enforce, by petition, under the Arbitration Act. Our guide to enforcing a foreign judgment or arbitral award in Thailand sets out both routes, the three-year deadline on awards and the prescription trap that catches judgment creditors.

Thai courts will not automatically enforce foreign judgments. You must file a new lawsuit in Thailand. A party relying on the foreign judgment in that lawsuit should expect the court to look at whether:

• The foreign court had jurisdiction (Thai courts agree it did)
• The foreign judgment is final (not appealable)
• The defendant was properly served
• The judgment doesn’t violate Thai public policy
• The defendant had a fair chance to be heard

This process can take 1-2 years in Thailand. It’s expensive and uncertain. This is why international contracts should include arbitration (awards are enforced much more easily) or include jurisdiction clauses that agree to Thai courts upfront.

Costs of Legal Proceedings in Thailand

One advantage of Thailand’s legal system is cost. Thai litigation is much cheaper than US litigation. Here’s what to expect:

Cost Type	Simple Contract Dispute (500k Baht Claim)	Complex Commercial Dispute (5M Baht Claim)	Property Dispute (1M Baht Claim)
Court Filing Fee	10,000 baht	100,000 baht	20,000 baht
Lawyer Fees (Hourly or Flat)	25,000-50,000 baht	150,000-300,000 baht	50,000-100,000 baht
Expert Reports (if needed)	0 (usually not needed)	50,000-100,000 baht	20,000-40,000 baht
Miscellaneous (service, translation, travel)	10,000 baht	30,000-50,000 baht	15,000-25,000 baht
Total (first instance to judgment)	45,000-70,000 baht	330,000-550,000 baht	105,000-185,000 baht
Total (first instance + appeal + Supreme Court)	80,000-155,000 baht	520,000-970,000 baht	185,000-360,000 baht

For context, a similar contract dispute in the US would cost $50,000-200,000 in lawyer fees alone. Thai litigation is a bargain.

Lawyer fees vary. Some lawyers charge hourly rates (1,500-3,000 baht per hour for experienced counsel). Others charge flat fees for cases. Corporate and commercial lawyers cost more than lawyers handling simple disputes.

One cost that’s NOT typically high in Thailand: expert witnesses. In the US, expert witnesses cost thousands. In Thailand, expert reports cost a few thousand baht. This is one reason Thai litigation stays affordable.

Frequently Asked Questions

How ThaiLawOnline Can Help

Understanding Thailand’s civil law system is the first step. Applying that understanding to your specific situation requires expert guidance.

At ThaiLawOnline, we bring 20+ years of legal experience to help you navigate Thai law. Whether you’re entering a contract, buying property, managing a business dispute, or settling long-term in Thailand, we can advise you on your rights and options.

We specialize in helping Western clients understand and work within Thailand’s legal framework. We can help you:

• Review and draft contracts compliant with Thai law
• Navigate property acquisition and ownership rules for foreigners
• Set up business entities and understand tax obligations
• Resolve disputes through litigation, arbitration, or mediation
• Understand visa requirements and compliance
• Protect your assets and plan succession

Need advice on your situation? Book a one-hour online consultation for 2,000 THB or see our fixed-fee services. Meetings are by appointment only.

Key Takeaways

• Thailand uses a civil law system based on written statutes, not judge-made precedent like Western countries.
• The Thai Civil and Commercial Code is the primary statute governing contracts, property, and family matters.
• Thai courts have three tiers (lower courts, appeals courts, and the Supreme Court) plus specialized courts for specific matters.
• Thai litigation is faster and cheaper than in the US but slower than in some other countries; expect 2-4 years for first-instance judgment.
• There are no jury trials in Thailand; trained judges decide all cases.
• Foreigners can sue and be sued in Thai courts, but face restrictions on land ownership and must comply with visa and business rules.
• Arbitration and mediation are often faster and more private than court litigation.
• Judgment enforcement requires persistence; Thai courts can be slow to collect awards.
• Contracts should include arbitration clauses and choice of law provisions for clarity.
• Hiring a skilled Thai lawyer is essential; local expertise matters in navigating cultural and legal differences.

Last reviewed: 7 September 2026. Every provision this page cites by number was read verbatim from the statute library, and five citations were corrected. Section 220 is a debtor’s responsibility for the fault of an agent or employee, not contract formation, which begins at section 354. Section 398 is the management of another’s affairs to avert imminent danger, not the sale of land, which is section 456, and the page already cited 456 correctly two lines further on. Section 545 is sub-hire inside the hire of PROPERTY; hire of WORK is defined at section 587. Section 1468 is only the rule that ante-nuptial clauses do not bind third persons acting in good faith, so the general property regime of spouses is now cited from section 1465 onward. And section 15 is when legal personality begins and ends; it carries nothing about nationality, so the page’s true point about foreigners having standing no longer rests on a provision that does not say it. Checked and found correct: Book 4 on property really does run from section 1298 to 1434, and the thirty year ceiling on a lease of immovable property is section 540. This review covered the numbered citations and nothing else. It did not check the Land Code, the Revenue Code or the Arbitration Act, which are not in our statute library; the court structure and procedure described here; the timescales and cost estimates; or the general narrative, which is a long explainer and was not read line by line for accuracy. Re-checked on 11 October 2026: Table 1 annexed to the Civil Procedure Code, as replaced by the Civil Procedure Code Amendment Act (No. 24) B.E. 2551, read in Thai from the Royal Gazette; the court fee is 2% capped at 200,000 baht up to 50 million baht and 200 baht per matter for non-money relief, so the “1-2%” description and the 500,000 baht example (now 10,000 baht) were corrected; the other cost estimates and timescales remain unverified.