The Fine Is 500 Baht and the Bill Is 400,000
Nobody in Thailand cares whether you have an international driving permit. Your insurance company cares enormously, and they are the one who pays or does not.
A policeman on the side of the road in Chiang Mai waves you over, asks for your licence and your permit, finds neither, and writes a ticket. Two thousand baht, maybe, and a long afternoon lost. People treat this as the risk, because it is the risk they can see.
It is not the risk. The risk is the 500 baht fine you never got, and the hospital bill that arrives eight weeks later.
Last verified 5 September 2026.
What the law actually says
The Motor Vehicle Act B.E. 2522 allows a foreign visitor to drive on an International Driving Permit issued under the Geneva or Vienna conventions, carried together with their national licence. The IDP is a translation document. It confers no rights of its own and it is worthless without the home licence it accompanies.
Thailand is a party to the conventions, but China and Taiwan are not covered. IDPs issued under those systems are not recognised, and a licence written in a script the officer cannot read is treated as no licence at all.
The practical threshold is around 90 days. Beyond that, a non-immigrant visa holder is expected to hold a Thai licence, which needs a medical certificate, proof of address, a legal translation of your licence, and an aptitude test. A tourist visa is not sufficient to apply.
ASEAN nationals can generally drive on their domestic licence under reciprocal arrangements.
The trap that costs the money
A car licence is not a motorcycle licence. If your home licence is category B, your IDP is category B, and you ride a 110cc scooter, you are unlicensed. The categories must be present on both documents, and an automatic endorsement picked up alongside a car licence does not count in Thailand.
This applies to every scooter, including the small automatic ones that look like they do not count as a motorcycle. There is no engine-size threshold below which the rule relaxes.
If you are unlicensed, your travel insurance will not pay. Not reduce the payment, not apply an excess: refuse the claim. Travel policies also almost universally exclude motorcycle accidents for riders without the correct endorsement, so you are relying on the rental shop's third-party cover, which is minimal.
Major Thai insurers including AXA and Roojai require a valid IDP or Thai licence before they process a claim, and invalid or absent documentation is consistently the number one reason a Thai driving claim is rejected. The rental company's own insurance is a separate and much smaller thing.
Thai hospitals can hold your passport until medical bills are settled. So the sequence is: unlicensed accident, hospital wants money you do not have, hospital holds the document you need to leave the country or contact anyone.
What it actually costs
A broken leg in Thailand is a five-figure sum in baht before any follow-up. Add surgery, add a period in a private room, add rehabilitation, and a serious injury runs into the tens of thousands of dollars. This is the number that makes a 500 baht traffic fine irrelevant.
Roadside fines are genuinely modest: typically 500 to 2,000 baht. Enforcement varies sharply by place. Phuket, Pattaya and Chiang Mai have active checkpoints and officers who know how to check whether a motorcycle category exists. Bangkok and rural areas are less attentive.
Every vehicle must carry compulsory third-party insurance (Por Ror Bor). If you rent, the company provides it, and you should not separately buy third-party cover for a car. What you will not be covered for is your own injuries.
When the rules are not the problem
Renting a car is a different proposition from riding a scooter. A proper international rental includes third-party cover, and a car licence plus IDP is a straightforward combination. The complexity is almost entirely about motorbikes.
There are policies that cover small scooters in Thailand without a local licence, and a handful of insurers write the exception into the wording deliberately. Read the motorcycle clause specifically rather than the medical cover summary, because that is the only place it appears.
Carry a photo of your passport for checkpoints and keep the original somewhere safe. A photocopy satisfies a routine document check; losing the original is a genuinely bad afternoon.
The short version
If you are going to ride a scooter, get the category on both documents before you land, and buy a policy that says in writing that it covers you on one without a Thai licence. Those two things cost a day of your time at home and solve the only problem here that has a large number attached to it. Everything else in Thai driving is a negotiation with left-hand traffic, and you will manage that by Friday.
