Thailand Criminal Code: Offenses, Punishments, and Time Limits

The Thailand Criminal Code is the country’s central penal statute, enacted in 1956 as B.E. 2499 to replace the older Criminal Law of B.E. 2451.¹ It defines what counts as a criminal act, sets out the punishments courts can impose, and governs every person within the Kingdom’s borders regardless of nationality. Dozens of amendments have updated it since 1956 to reflect changing social conditions.

How the Code Is Organized

The code is split into three Books.² Book 1 contains the general principles that apply across every offense: how intent and negligence are defined, when an attempt is punishable, and how liability is assessed. Book 2 is the catalog of specific crimes, grouped by the interest they protect, from the security of the Kingdom to offenses against persons and property. Book 3 covers petty offenses, with penalties capped at one month of imprisonment or a one thousand baht fine.

Section numbers run continuously across all three Books rather than restarting, which matters when looking up a provision by number.

Where the Code Applies

Section 4 sets the territorial rule: anyone who commits an offense inside Thailand is subject to Thai criminal law. The same applies to acts committed aboard Thai-registered ships or aircraft wherever they are at the time.²

Sections 7, 8, and 9 reach beyond the border for certain categories: offenses that threaten national interests, cases where a Thai national is either the offender or the victim, and certain corruption offenses by Thai officials abroad.²

If a foreign court has already handled the same conduct, Section 10 bars re-punishment in Thailand where the person was acquitted or fully served a foreign sentence for an extraterritorial offense; a partial sentence can be credited by the Thai court. Section 11 applies a comparable logic to offenses committed inside Thailand that were already punished abroad.²

When Conduct Is Criminal

Section 59 states the baseline: a person is criminally liable only for an act committed intentionally, unless a specific provision expressly covers negligent or unintentional conduct.³ Intent means acting consciously while either desiring the harmful result or foreseeing it as likely. A person who did not know the facts that make up the offense is treated as lacking intent.

Negligence means acting without the care that could reasonably be expected and that the person could have exercised. Negligent versions of offenses carry significantly lighter penalties than their intentional counterparts. Section 59 also makes clear that failing to act, where there is a legal duty to prevent harm, can itself be a criminal act.

Age of Criminal Responsibility

A 2022 amendment, the 29th to the code, raised the minimum age of criminal responsibility. Children under twelve cannot be punished for conduct that would otherwise be a criminal offense. Between twelve and fifteen, liability is conditional, with courts choosing between punishment and alternative measures. The earlier floor was ten.

The Five Forms of Punishment

Section 18 lists the punishments a Thai court can impose:⁴

Death, carried out by lethal injection and reserved for the most serious offenses such as murder during robbery and certain crimes against the state. Executions have been rare in recent decades.
Imprisonment, from short terms up to life depending on the offense.
Confinement, a lighter alternative served outside a traditional prison, available under Section 23 only when the term would not exceed three months and the offender has no disqualifying prior record. A confined person may be ordered to serve the time at home or in another consenting person’s dwelling, and keeps more day-to-day freedoms than a prisoner.⁵
Fines, often combined with imprisonment.
Forfeiture of property connected to the offense.

Section 18 protects juveniles from the harshest penalties: neither death nor life imprisonment may be imposed on someone who was under eighteen at the time of the offense. Where those sentences would otherwise apply, the term is commuted to fifty years.⁴

Offenses Against the State and the Monarchy

Book 2 opens with offenses against the security of the Kingdom. Section 112, the lèse-majesté provision, makes it an offense to defame, insult, or threaten the King, Queen, Heir-apparent, or Regent, with a penalty of three to fifteen years of imprisonment per count.⁶ Foreigners face the same penalties as Thai nationals.

Section 116 covers sedition: public statements, writings, or other expressions intended to change the law or government through violence, provoke public unrest, or incite others to break the law. The maximum penalty is seven years of imprisonment.³ Separate provisions on insurrection, rebellion, and espionage carry some of the heaviest penalties in the code, up to death in the most serious cases.

Offenses Against Persons

Section 288 covers intentional killing. A murder conviction carries either death or imprisonment of fifteen to twenty years.³ The code grades bodily harm offenses by the severity of the injury inflicted, so penalties scale from minor assaults up to acts causing permanent disability.

Offenses Against Property

Basic theft under Section 334 carries up to three years of imprisonment and a fine of up to six thousand baht.⁴ Section 335 raises the stakes when aggravating circumstances are present: theft at night, during a disaster, by breaking through barriers, by disguise, by impersonating an official, or while armed. One such factor brings one to five years of imprisonment and a two thousand to ten thousand baht fine. Two or more push the ceiling to seven years.

Snatching, defined in Section 336 as theft by grabbing property from someone’s immediate presence, carries up to five years and a fine of up to ten thousand baht. The penalties climb when the victim is hurt, reaching five to fifteen years if the snatching causes death.⁴

Robbery under Section 339 is theft accomplished through violence or an immediate threat of it. The base range is five to ten years of imprisonment and a fine of ten thousand to twenty thousand baht, rising to ten to twenty years if the victim is hurt, fifteen to twenty years for grievous bodily harm, and death or life imprisonment if the victim dies.³

Section 340 covers gang robbery, where more than three people take part. The base penalty is ten to fifteen years and a fine of two hundred thousand to three hundred thousand baht. A single armed participant raises the range to twelve to twenty years, and a gang robbery resulting in death carries the death penalty.³

Defenses and Mitigation

Section 68 makes an act committed to defend yourself or another person from an imminent, unlawful threat non-punishable, so long as the response was reasonable under the circumstances.⁷ If the defensive act went beyond what was reasonable, Section 69 lets the court reduce the punishment, and the court may waive it entirely where the person overreacted out of panic or fear.

Section 78 gives courts discretion to cut any sentence by up to half when mitigating circumstances exist. The code lists examples: showing remorse and trying to minimize harm, voluntarily surrendering, and providing information useful to the court during trial.⁷ This is a broad provision, and cooperation during the process can meaningfully reduce the final sentence.

Time Limits on Prosecution

Section 95 sets the periods after which prosecution is barred, running from the date of the offense:²

20 years for offenses punishable by death, life imprisonment, or twenty years of imprisonment.
15 years for offenses punishable by more than seven and up to twenty years of imprisonment.
10 years for offenses punishable by more than one and up to seven years.
5 years for offenses punishable by more than one month and up to one year.
1 year for offenses punishable by one month or less, or by any other punishment.

These periods cannot be paused or extended. One exception: if a defendant has been brought before the court but then escapes or is found mentally unfit to stand trial, the limitation period restarts from the date of escape or the suspension order.²

For compoundable offenses, where the victim decides whether to pursue charges, Section 96 adds a shorter deadline: the injured person must file a complaint within three months of learning the identity of the offender, or prosecution is no longer possible.

What the Criminal Code Does Not Cover

Several major areas of Thai criminal law sit outside this statute. Drug offenses are governed by the Narcotics Code, which carries some of the country’s harshest penalties and is the law foreign nationals most often encounter in criminal matters. Computer-related offenses, including unauthorized access, data interference, and the spread of false information online, fall under the Computer Crime Act of B.E. 2560 (2017), which has its own penalty structure. For a specific matter, confirm which statute applies before relying on the Criminal Code.

1
CYRILLA: Global Digital Rights Law. Thailand Criminal Code B.E. 2499 (1956)
2
Anti-Slavery Law. Thailand Penal Code
3
Office of the Attorney General. Thailand Criminal Code
4
FAOLEX. Criminal Code of Thailand
5
CYRILLA: Global Digital Rights Law. Thailand Criminal Code B.E. 2499 (1956)
6
Ministry of Foreign Affairs, Kingdom of Thailand. Comments on OHCHRs Press Release Regarding Legal Proceedings under Section 112 of the Penal Code
7
National Anti-Corruption Commission. Thailand Criminal Code