Thai Traffic Law for Motorbike Travelers in Phuket: A Complete Guide

Tourists riding a rented motorbike in Phuket must carry a valid motorcycle licence plus an International Driving Permit (IDP) with a motorcycle endorsement, wear an approved helmet as rider and passenger, stay under Thailand's 0.05% blood-alcohol limit, obey posted speed limits, and avoid handheld phone use. Breaking these rules risks an on-the-spot fine and can void your travel or rental insurance.

Phuket's roads are busy, the rules are enforced more strictly than they used to be, and the penalties have gone up sharply since Thailand's Land Traffic Act amendments took effect. This guide walks through exactly what Thai law requires of a visitor on a rented scooter or motorbike, what it costs to get it wrong, and what actually happens if you're stopped at a checkpoint on Chalong Circle, the Patong hill, or anywhere else on the island.

Do You Need a Licence or International Driving Permit (IDP)?

Yes. Thai law requires every foreign visitor operating a motor vehicle — including a 125cc scooter — to hold a valid driving licence from their home country and an International Driving Permit that specifically covers motorcycles (Category A). A car-only licence or a car-only IDP does not legally cover you on a scooter, even a small-engine one; Thailand does not carve out an exemption for 'just a scooter.'

The IDP has to be arranged before you leave home — it cannot be issued in Thailand. If your home country isn't a party to the international conventions Thailand recognises, or your IDP doesn't carry the motorcycle category, you're technically riding without a valid licence, which carries its own fine and — more importantly — can be used by an insurer to deny a claim after an accident.

If you're planning a longer stay and want to convert to a full Thai driving licence, how to get a Thai driving licence as a foreigner walks through the process at the Phuket Land Transport Office.

Helmet Law: Driver and Passenger

Under Section 122 of the Land Traffic Act, both the rider and any passenger must wear an approved safety helmet, fastened, at all times while the vehicle is moving. This isn't a soft suggestion enforced only in theory — Phuket checkpoints treat it as one of the two or three most commonly ticketed offences for tourists.

The 2022 amendment to the Land Traffic Act (Act No. 13, B.E. 2565) raised the maximum fine for riding without a helmet from 500 baht to up to 2,000 baht, and the rider can be fined separately for an unhelmeted passenger — so two people without helmets can mean two separate fines. A helmet violation also costs one point under the demerit-point licence system introduced in January 2023 (more on that below).

Chang Thai provides a proper helmet with every rental — use it, even for a five-minute ride to 7-Eleven. Most serious head injuries in Thailand's motorbike accidents happen on short, low-speed trips where the helmet gets skipped.

Speed Limits by Road Type

Thailand's speed limits are set nationally under the 2021 Ministerial Regulation on speed limits, and then adjusted locally by signage. As a rider in Phuket, the practical bands are:

Built-up areas, towns, and residential sois — generally 50–60 km/h.
Open two-lane roads outside town centres — up to 90 km/h, though most of Phuket's main roads (Thepkrasattri Road, the Chalong–Kata route, Vichitsongkram Road) carry lower posted limits because of heavy mixed traffic.
Motorways and expressways — motorcycles are prohibited outright, regardless of engine size.

Always follow the posted sign over any general rule — Phuket's hill roads, school zones, and market areas frequently post limits well below the national default, and that posted number is what a checkpoint radar gun will hold you to.

Lane Position and Overtaking

Thailand drives on the left. Slower traffic, including motorbikes, is expected to keep to the left lane and overtake on the right — undertaking (passing on the inside of a vehicle that's turning or slowing) is a common cause of tourist accidents in Phuket and is treated as reckless driving if it causes a collision. Overtaking on blind curves, hill crests, or across a solid centre line is illegal everywhere in Thailand, not just where a sign says so.

Alcohol Limits for Riders

The general legal blood-alcohol limit for driving in Thailand is 0.05%. A stricter 0.02% limit applies to riders under 20 years old, anyone on a learner's or provisional licence, and anyone who has held their licence for less than five years — a bracket worth checking carefully if you're unsure which one you fall into.

Drink-driving in Thailand is prosecuted as a criminal offence, not just a traffic fine — penalties can include a substantial fine, imprisonment, and licence suspension or revocation, and it carries the maximum four-point deduction under the demerit system. Motorcycles are involved in the large majority of Thailand's road fatalities, and a disproportionate share of those crashes involve alcohol, which is precisely why enforcement around this rule has tightened in tourist areas.

Phone Use While Riding

Since an October 2022 amendment to Section 43(9) of the Land Traffic Act, using a phone or any communication device without a proper hands-free setup while driving or riding is illegal, with fines of roughly 400–1,000 baht. Holding a phone to check a map, answer a message, or take a photo while the bike is moving falls squarely under this rule.

If you need navigation, use a proper phone mount, keep the phone in a fixed, hands-free position, and glance rather than fumble. Better still, plan your route — or at least your first turn — before you pull out of the shop.

Documents You Must Carry While Riding

Keep these on you every time you ride, not left back at the hotel or condo:

Your passport, or a clear copy/photo of the photo page and current entry stamp.
Your home-country motorcycle driving licence.
Your International Driving Permit with the motorcycle (Category A) endorsement.
The bike's registration book (the shop provides this) and proof of the compulsory insurance (พ.ร.บ. / Por Ror Bor) — Chang Thai keeps a copy in the under-seat compartment of every bike.

Carrying good phone photos of your passport and licences is sensible so you're not handing over the physical originals unnecessarily, but a checkpoint officer can still ask to see the real documents.

Common Fines and Penalties

Fine amounts below are the legislated maximums under the current Land Traffic Act; the amount actually charged at a given checkpoint can vary by officer discretion, location, and whether it's paid on the spot or at the station, so treat these as the ceiling to expect rather than a fixed price list.

Violation	Typical Fine (THB)	Demerit Points
No helmet (per person, rider or passenger)	Up to 2,000	1
No valid licence / no IDP with motorcycle endorsement	1,000–2,000	1
Speeding	Up to 4,000	1
Running a red light	Up to 4,000	2
Driving against traffic / wrong side	Up to 2,000	2
Handheld phone use while riding	400–1,000	1
Drink-driving (DUI)	Fine plus possible imprisonment, licence suspension	4
Reckless or dangerous driving	5,000–20,000, and/or up to 1 year imprisonment	4

Since January 2023, Thailand also runs a demerit-point licence system: every licence starts with 12 points, and points lost for offences like the ones above are restored automatically after a year of clean riding, or sooner via a retraining course. Lose all 12 within the tracked period and the licence is suspended for 90 days.

What Happens at a Police Checkpoint

Checkpoints are a normal part of riding in Phuket, especially around Chalong Circle, the Patong–Kathu road, and near the airport during peak season. If you're waved down:

Pull over safely, stop the engine, and stay calm — most stops are routine document checks, not confrontations.
Present your passport (or a clear copy), driving licence, and IDP when asked.
If you've committed a genuine violation (no helmet, missing documents), the officer will either collect the fine on the spot against a receipt, or direct you to pay at the local police station within the timeframe on the ticket.
Ask for and keep the receipt — it's your proof of payment and, in some cases, a temporary document while your original is processed.
Avoid handing over your only passport if you can show a photo or copy instead, and never hand over cash without a receipt being offered.

If you disagree with a fine, the appropriate place to contest it is the police station or Tourist Police, not the roadside — Phuket's Tourist Police (dial 1155) are used to dealing with rental-related stops and speak English.

Insurance Requirement

Every registered motorbike in Thailand, including every rental bike, must carry compulsory third-party insurance known as พ.ร.บ. (Por Ror Bor). It covers basic medical costs for anyone injured — rider, passenger, or third party — up to a limited amount per person, and it's a legal requirement to have it, not an optional extra.

What it doesn't cover is just as important: พ.ร.บ. pays out for injury, not for damage to the bike itself, damage to someone else's vehicle or property, or your own significant medical bills beyond its cap. That's why a rental agreement with real accident/damage coverage matters far more in practice than the compulsory minimum. Every Chang Thai Rentals bike includes the compulsory insurance plus the shop's own coverage and a proper helmet as standard — it's built into the rental, not an upsell.

Frequently Asked Questions

Do I need an International Driving Permit to ride a scooter in Phuket?

Yes. Thai law requires a valid home-country motorcycle licence plus an IDP that specifically includes a motorcycle (Category A) endorsement. A car-only IDP does not cover a scooter, regardless of engine size.

What is the fine for not wearing a helmet in Thailand?

Up to 2,000 baht per person, following the 2022 increase from the previous 500-baht maximum. The rider and any unhelmeted passenger can each be fined.

What is the legal blood-alcohol limit for riding a motorbike in Thailand?

0.05% for most licence holders, dropping to 0.02% for riders under 20, those on a provisional licence, or anyone who has held their licence for under five years.

Can I use a phone mount to navigate while riding?

Yes, provided the phone is in a fixed, hands-free mount and you're not holding or operating it directly while the bike is moving. Holding a phone to check directions is a fineable offence.

What documents should I carry when riding a rented motorbike?

Your passport (or clear copy), home-country motorcycle licence, International Driving Permit with motorcycle endorsement, and the bike's registration and compulsory insurance document, which the rental shop provides.

What happens if I'm stopped without a licence or IDP?

You can be fined on the spot or directed to pay at the local police station, and — separately from the traffic fine — riding without a valid licence/IDP combination is grounds for an insurer to deny an accident claim, which is the costlier consequence in practice.

Ride Prepared, Not Worried

None of this is meant to make riding in Phuket sound intimidating — thousands of visitors ride safely here every week. It just takes a genuine licence and IDP, a helmet actually worn rather than hung on the mirror, and attention to the same rules that apply back home: don't drink and ride, don't outrun the speed limit, and keep your phone in its mount.

Every motorbike and scooter from Chang Thai Rentals — from a Honda Click 125i for zipping around Old Town to a Forza 350 for the Phang Nga loop — comes with a proper helmet, compulsory insurance, and the shop's own damage coverage included, picked up from our branches in Chalong, Mai Khao, the Airport, Bang Tao, or Phuket Old Town, or delivered free to Kata, Karon, Patong, Rawai, and other nearby areas. If you'd rather double-check requirements before you book, how to rent a motorbike in Phuket covers the paperwork step by step, and our guide to what to do after a motorbike accident is worth reading before you ever need it. Questions before you book? Message us on WhatsApp at wa.link/n6a7za or visit changthairentals.com.