How the Thai legal system works
Thailand follows the civil law tradition: the law lives in written codes, judges apply the codes, and previous judgments — while influential — do not formally bind later courts the way precedent does in England or the United States.
The main codes
- Civil and Commercial Code (CCC) — contracts, property, family, inheritance, companies. The code you will meet most often.
- Criminal Code — offences and penalties.
- Civil Procedure Code / Criminal Procedure Code — how cases move through the courts.
- Land Code — land ownership and title deeds, including the rules that restrict foreign ownership.
- Plus many specific acts: the Foreign Business Act, Labour Protection Act, Computer Crime Act, Condominium Act and others.
The court hierarchy
| Level | What it does |
|---|---|
| Courts of First Instance | Where cases start: provincial courts, kwaeng (district/small-claims style) courts for minor matters, and specialised courts — Labour, Tax, Intellectual Property & International Trade, Bankruptcy, and Juvenile & Family. |
| Court of Appeal | Reviews first-instance judgments (there are regional appeal courts). |
| Supreme Court (San Dika) | The final court. Since reforms in the 2010s most cases need permission to reach it. |
Separate from this ladder sit the Constitutional Court (constitutionality of laws) and the Administrative Courts (disputes with government agencies).
Things that surprise newcomers
- No juries. Cases are decided by panels of career judges.
- Everything is in Thai. Court proceedings and filings are in Thai; foreign parties work through interpreters and translated documents.
- Mediation is pushed hard. Thai courts actively encourage settlement, and many civil cases end in a court-supervised compromise agreement.
- Criminal defamation exists. Defamation can be prosecuted criminally, not just sued over — see the criminal process.
- Cases take time. A contested civil case commonly runs a year or more at first instance; appeals add more.
- Smaller disputes have lighter tracks. Consumer claims and modest money claims do not have to follow the full ordinary procedure — see small claims.
- Judgments are not a searchable precedent database the way common-law case law is. Lawyers rely on published Supreme Court decisions as persuasive guidance, but each case is argued on the code provisions themselves.
Where Thai law comes from
The Constitution sits at the top as the supreme law; ordinary acts are passed by the National Assembly and take effect once given royal assent and published in the Royal Gazette. Most day-to-day detail, though, lives one level down: ministerial regulations, notifications and royal decrees issued under a parent act fill in thresholds, forms and procedures, and are amended far more often than the acts themselves — which is exactly why guides like this one describe the shape of a rule rather than quoting a figure that may already be out of date. Thailand is also party to a range of international treaties and conventions that, once ratified and where relevant legislation is passed, feed into domestic law on subjects from trade to child protection.
The legal profession at a glance
Three distinct careers sit inside what looks from outside like “the legal system”: judges, who enter through a competitive judicial examination and training track rather than political appointment; public prosecutors, who belong to a separate agency from the courts and decide whether the state pursues a criminal charge; and licensed lawyers, regulated by the Lawyers Council of Thailand, who advise and represent private parties — see hiring a lawyer for how that licensing works and what it means for you.
Alternative dispute resolution
Not every disagreement has to end in a judgment. Beyond the court-annexed mediation described above, Thailand has a dedicated Thailand Arbitration Institute and other recognised arbitration bodies for commercial disputes where the parties have agreed in advance to arbitrate rather than litigate, and various sector-specific mediation and complaint channels — consumer, labour, financial — that are often faster and cheaper than a lawsuit. See free legal help and, for consumer and workplace disputes specifically, consumer protection and employment law.
Official starting points: the Courts of Justice (coj.go.th) and the Office of the Council of State, which publishes consolidated laws (some with English translations).