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Legal Blood Alcohol Limit
Thailand's legal blood alcohol concentration (BAC) limit is 0.05% (50 mg per 100 ml of blood) for drivers who have held their license for 5 or more years. This is stricter than many Western countries — the US limit is 0.08%, for example. Critically, a stricter limit of 0.02% BAC (20 mg per decilitre) applies to several categories: drivers under 20 years old, holders of provisional or temporary (2-year) licenses, drivers who have held their license for less than 5 years, drivers without a valid license or with a suspended or revoked license, and drivers operating vehicles outside their license category. Since most foreigners hold a 2-year temporary Thai license or have held their 5-year license for less than 5 years, the 0.02% limit is the one that actually applies to you — this is essentially zero tolerance, as even a single drink can put you over this threshold. In practical terms, the safest approach is simple: if you drink, do not drive. Thailand has affordable ride-hailing services (Grab, Bolt) available in all major cities and tourist areas, making it easy to get home without driving.
Penalties for Drunk Driving
Penalties for driving under the influence in Thailand are severe and have been tightened in recent years. For a first offense with BAC between 0.05% and 0.10%, you face a fine of up to 20,000 baht and/or imprisonment of up to 1 year. Your driving license will be suspended for at least 6 months. For BAC above 0.10% or repeat offenses, penalties escalate significantly — fines up to 100,000 baht and imprisonment of up to 5 years are possible. If a drunk driving incident causes injury, the penalties increase further: up to 200,000 baht fine, imprisonment of up to 5 years, and permanent license revocation is possible. If drunk driving causes death, the driver faces imprisonment of 3 to 10 years and a fine of 60,000 to 200,000 baht. These are criminal penalties — in addition, the driver faces civil liability for all damages and injuries caused. For foreigners, a drunk driving conviction can also affect your visa status and may result in deportation proceedings. Insurance companies will deny claims if the driver was intoxicated, leaving you personally liable for all costs — which can be devastating in a serious accident.
DUI Checkpoints and Enforcement
Police DUI checkpoints are common throughout Thailand, particularly on Friday and Saturday nights, during long holiday weekends, and during the notorious 'seven dangerous days' periods surrounding Songkran (Thai New Year, mid-April) and Western New Year. Common checkpoint locations include main roads near entertainment districts in Bangkok (Sukhumvit, Silom, RCA, Thonglor, Khao San Road area), tourist areas in Phuket (Bangla Road area, beach roads), Pattaya (Walking Street area, Second Road), and Chiang Mai (the Moat area, Nimmanhaemin Road). At a checkpoint, officers will stop vehicles and may ask you to take a breathalyzer test. Refusing a breathalyzer test is treated as an admission of guilt and carries the same penalties as failing the test. If you fail the test, you will be arrested and taken to the police station. Your vehicle may be impounded. For foreigners, it is critical to remain calm and cooperative at checkpoints. Have your driving license (Thai or IDP with original license) and passport or passport copy ready. Officers in tourist areas usually speak basic English. Do not attempt to bribe officers — this is a criminal offense and is taken seriously, especially with the increased focus on road safety enforcement.
The Seven Dangerous Days
Thailand's 'seven dangerous days' refer to the periods surrounding Songkran (April 11–17) and New Year (December 27–January 2) when road fatalities spike dramatically due to increased travel, celebration, and alcohol consumption. The numbers are sobering: during the New Year 2026 seven dangerous days (December 27, 2025 to January 2, 2026), 272 people were killed, 1,464 injured, and 1,511 accidents occurred. Speeding was the leading cause at 40.96%, followed by drink-driving at 27.31%, and motorcycles were involved in 74.44% of accidents. During Songkran 2025 (April 11–17), 253 people died and 1,495 were injured in 1,538 accidents — though this represented a 12% improvement from 2024 (287 deaths). Bangkok recorded the highest deaths (19), while six provinces achieved zero fatalities. Most victims were aged 20–29, 64.67% were male, and motorcycles were the leading vehicle type. During these periods, the government launches intensive road safety campaigns with massively increased checkpoint frequency. If you are in Thailand during these holidays, exercise extreme caution — avoid driving late at night, and consider using ride-hailing services instead. Many long-term expats consider these the most dangerous times to be on Thai roads and adjust their travel plans accordingly.
Make sure you are properly licensed
The most important step before driving in Thailand is having a valid license. We handle the entire process for you.