Thailand on an Irish Licence — IDP Required, but No Side Switch

Irish drivers get a head start in Thailand that most visitors never have: both countries drive on the left. Your roundabout reflexes, your overtaking judgement and your sense of where the car sits in the lane all carry over. What does not carry over is the paperwork and the density of two-wheeled traffic.

The permit is the one thing to sort at home

Thailand requires an International Driving Permit with your Irish licence. Our record for the country says the IDP is valid for the period of your entry permit, and that the German Foreign Office names a 1968-convention IDP carried with the national licence. An Irish licence on its own is not enough at a checkpoint or a rental desk, and a crash without the right documents can leave you uninsured. You cannot get an IDP in Thailand, so collect it before you fly and keep it with your licence and passport.

Where Irish and Thai limits part ways

Kilometres per hour on both sides, so no conversion at all, but the numbers differ:

Thailand’s 80 km/h for towns is the legal ceiling for cars, not a target. Signed limits in busy streets are lower, and the gap between the figure on the sign and the speed of the traffic is wide in both directions. The alcohol limit is 0.05, the same figure you know from home, though with scooters appearing from side lanes, arriving with a clear head is the better habit.

Fines you can compare with home

In euro terms the Thai fines are far lighter, which is no reason to relax. Over 30 km/h above the limit the Thai figure climbs to THB 2,000-5,000 and a possible court appearance, the closest equivalent to the summons an Irish driver would receive.

Your first hours

Collect the car in daylight if you can. Walk round it with the rental agent and photograph the bodywork, and check that a warning triangle is in the boot; Thailand’s equipment list names it as required. Spend the first drive on a quiet road, watching mirrors more than you do in Dublin, because motorbikes filter past on both sides and pull out of side roads in numbers. Rural roads can be poorly lit at night.

Age, equipment and how long you can stay

Thailand’s minimum age for a car is 18, so a 17-year-old Irish licence holder, legal at home, cannot drive there. Our record gives 3 months as the practical stay for an IDP driver and ties its validity to your entry permit, so a longer holiday needs its own check. For kit, Thailand lists a warning triangle as required, a fire extinguisher and first-aid kit as recommended, and no reflective vest, no breathalyser. Ireland’s list is all recommended, so a rental car’s triangle is the one item that is mandatory here but not at home. Ask the agent to show it to you rather than assuming it is under the boot floor.

Emergency numbers differ from home

At home you dial 112. In Thailand our record lists separate lines: 191 for police, 1669 for an ambulance and 199 for the fire service. Save them before you leave the airport.

The full rule set is on the Thailand driving guide, the Driving Permit Checker confirms the permit, and the Speeding Fine Calculator estimates penalties.

Sources

• WHO Global status report on road safety 2023, Thailand profile (urban, rural and motorway limits): who.int