What's the drink driving limit in Thailand?
The general limit is 0.05% — the same as back home — but it drops to just 0.02% for newer and younger drivers, and the penalties run all the way to prison and deportation. Here's what every Australian heading to Thailand should know before getting behind a wheel or on a scooter.
The limit: 0.05%, or 0.02% for newer drivers
Thailand sets its standard drink-driving limit at 0.05% blood alcohol concentration (BAC) — written in Thai law as 50 milligrams of alcohol per 100 millilitres of blood. That's identical to the full-licence limit in most of Australia, so it can feel familiar. But the familiarity is a trap, because a much stricter limit applies to a lot of drivers.
A limit of 0.02% BAC (20 mg per 100 ml) applies to drivers who are under 20, who hold a provisional or temporary licence, or who have been licensed for less than five years — as well as unlicensed and suspended drivers. Because many visitors have held their licence a relatively short time or are driving on a temporary arrangement, the stricter figure can apply to tourists too. At 0.02%, even a single drink can put you over. The only safe plan is to treat your limit as zero whenever you intend to drive or ride.
The penalties are severe — and apply to foreigners
Thailand has worked hard to crack down on drink driving, and the penalties reflect it. Exact figures vary with the offence and have been tightened over time, but as a guide:
- First offence: a fine of up to around 20,000 baht and/or up to one year in prison, plus a licence suspension of at least six months.
- High reading or repeat offence: fines up to around 100,000 baht and/or up to five years in prison.
- Causing injury: fines up to around 200,000 baht, up to five years in prison and possible permanent loss of licence.
- Causing death: roughly three to ten years in prison plus a substantial fine.
Foreign drivers are not treated more leniently. A conviction can affect your visa, and in serious cases foreign nationals can face deportation. On top of any criminal penalty, you'll be liable for damages, and your insurer can refuse to pay out if you were over the limit.
Driving and riding on an Australian licence
Australia's foreign affairs service, Smartraveller, is blunt about the risks. To drive a car or motorbike legally you need a valid International Driving Permit (IDP) plus your physical Australian licence — a digital licence may not be accepted. You must hold a motorcycle licence to ride a scooter, whatever the rental shop tells you, and you shouldn't drive any vehicle your Australian licence doesn't cover. Get it wrong and, in the event of a crash, "you may not be covered under insurance."
The road statistics are sobering. Smartraveller notes that "Thailand has one of the highest traffic-related fatality rates in the world. Motorcyclists are most at risk," and that "Australians are regularly injured or die in motorbike accidents in Thailand. Alcohol is often involved." Helmets are legally required for riders and passengers, yet hire shops and motorbike taxis rarely provide them. If you plan to ride, bring or buy a proper helmet and check that your travel insurance covers motorcycling — many policies charge extra or exclude it entirely.
Counting your drinks in Thailand
Thai beers like Chang, Singha and Leo are typically around 5% ABV — stronger than an Australian mid-strength and on par with full-strength — and they're often served in big bottles. Island-bar "buckets" of spirits and mixers are an unknown quantity by design. Here's roughly how common holiday drinks translate into Australian standard drinks (10 g of alcohol each), using the formula volume (ml) × %ABV × 0.789 ÷ 1000:
| Drink | Typical serve | Standard drinks |
|---|---|---|
| Small beer (bottle or can) | 330 ml @ 5% | ~1.3 |
| Large beer bottle | 620 ml @ 5% | ~2.4 |
| Glass of wine | 150 ml @ 13% | ~1.5 |
| Single spirit nip | 30 ml @ 40% | ~1.0 |
| Bar cocktail | varies | ~1.5–2+ |
| Spirit "bucket" | unknown | ~4+ (and rising) |
A single large Chang is close to two and a half standard drinks, so two in an afternoon already matches the Australian guideline of no more than four on any single day. Tracking what you actually drink — not empties — is the only way to know where you stand.
The morning-after trap
Only time lowers your BAC — about one standard drink, or 0.015%, per hour — and nothing speeds it up. Coffee, a cold shower or a big breakfast make you feel alert without changing your blood alcohol at all. After a long night on 5% beers or buckets, you can easily still be over the limit the next morning when you jump on the scooter to find breakfast. If there's any chance alcohol is still in your system, don't drive or ride.
Staying safe and legal
- Treat your limit as zero if you're driving or riding — the 0.02% tier can apply to you, and impairment starts well below any legal number.
- Use Grab, metered taxis, tuk-tuks or a sober driver after drinking. They're cheap and everywhere, and far safer than a scooter.
- Carry the right paperwork — IDP, physical Australian licence and passport — and only ride with a proper helmet and motorcycle licence.
- Mind the local rules: the legal age to buy and drink alcohol in Thailand is 20, and sales can be restricted by time of day or on certain holidays.
- Know the numbers: Police 191, Ambulance and rescue 1669, Tourist Police 1155.
For the general driving and insurance advice that applies wherever you travel, Smartraveller's road safety guide is worth a read before you go.
Frequently asked questions
What is the drink-driving limit in Thailand?
The general limit is 0.05% BAC (50 mg per 100 ml of blood) for drivers licensed five or more years — the same as most of Australia. A stricter 0.02% limit applies to drivers under 20, probationary or temporary licence holders, and anyone licensed for less than five years.
Can I drive in Thailand on my Australian licence?
Yes, with a valid International Driving Permit plus your physical Australian licence. Digital licences may not be accepted, and you need a motorcycle licence to ride a scooter legally. Driving an uncovered vehicle can void your insurance.
What are the penalties for drink driving in Thailand?
A first offence can mean a fine up to around 20,000 baht and/or up to a year in prison, plus at least six months' licence suspension. Higher readings, repeat offences and crashes carry far larger fines, years in prison, loss of licence and possible deportation for foreigners.
Is the limit lower for tourists on scooters?
The 0.02% limit can apply to drivers licensed under five years, which includes many visitors, so treat your limit as zero. Most serious injuries and deaths among Australian tourists in Thailand involve motorbikes, often with alcohol a factor.
How long until I'm safe to drive after drinking?
Only time lowers your BAC, at roughly one standard drink (0.015%) per hour. Nothing speeds it up, and you can still be over the limit the next morning. If you've been drinking, don't drive or ride.