Traffic accidents & personal injury, in outline

A road accident in Thailand can trigger three separate processes at once — an insurance claim, a civil claim for damages, and potentially a criminal case — and understanding which is which matters from the first hour after a crash.

At the scene

• Do not leave the scene of an accident involving injury — leaving can itself be treated as an aggravating factor in any later criminal case.
• Call the police for any accident involving injury, significant damage, or a dispute over fault; get an official report, which becomes important evidence later.
• Photograph the scene, vehicle positions and damage before anything is moved, where it is safe to do so.
• Exchange insurance and registration details; note that a driver leaving before police or insurers arrive can complicate everyone’s claim, including your own.

Compulsory insurance

Thai law requires every registered vehicle to carry compulsory motor insurance (commonly known by its Thai abbreviation, por ror bor), which provides a baseline of cover for injury and death regardless of fault, up to statutory limits. Most vehicles also carry voluntary additional insurance with broader cover; the details of what is covered vary significantly by policy, so a copy of the actual policy — not just the compulsory certificate — matters when a claim is being assessed.

Fault, and why it is not always simple

Thai civil liability for an accident generally follows fault-based tort principles under the Civil and Commercial Code — the party who caused the accident through negligence is generally liable for resulting loss. Fault is not always clear-cut, and can be apportioned between multiple parties. Where fault is genuinely disputed, the police report, any independent witnesses, and physical evidence such as dashcam footage or vehicle damage patterns become central to how the claim and any criminal case unfold.

Civil claims for injury or death

A person injured in an accident, or the family of someone killed, can generally bring a civil claim for damages — covering medical costs, lost income, pain and suffering, and, in a death, funeral costs and loss of support to dependents. These claims can proceed alongside, or instead of, an insurance settlement, and are often resolved through negotiation with the at-fault party’s insurer before reaching a courtroom. See debt & civil claims for the general shape of a civil claims process.

When an accident becomes a criminal matter

An accident causing injury or death can trigger criminal charges against the driver at fault — separately from, and in addition to, any civil claim or insurance payout. This is one of the most common ways foreigners in Thailand first encounter the criminal justice system, often without expecting it. See criminal matters for the general process from that point.

Driving on a foreign or expired licence

Driving without a valid Thai driving licence, or an International Driving Permit recognised for use in Thailand, is itself an offence, and can also affect whether an insurer pays out on a claim after an accident — some policies exclude cover if the driver was not properly licensed at the time. Confirm your licence situation is genuinely valid for the vehicle class you are driving before you need to rely on it.

Motorbikes

Motorbike accidents make up a large share of Thailand’s road traffic injuries, and riders and passengers without a helmet, or without the correct motorcycle licence class, can find both their insurance cover and any compensation claim significantly weakened as a result. Rental agreements for motorbikes also frequently include clauses assigning liability for damage that go well beyond what a renter expects — read them before signing, ideally with a translation.