What is the gambling law in Thailand?

The cornerstone of gambling regulation in Thailand is the Gambling Act, B.E. 2478, enacted in 1935. This comprehensive law imposes a broad prohibition on most forms of gambling throughout the kingdom. The only exceptions explicitly permitted under this legislation are the official state-run lottery and betting on horse races at specific, licensed racecourses.

All other gambling activities, including casinos, card games, and sports betting, are strictly illegal. The Act is enforced by the Royal Thai Police, and the penalties for contravention are severe. Individuals caught participating in illegal gambling can face a fine of up to 5,000 baht and a prison sentence of up to two years.

The penalties are even harsher for those who organize or operate illegal gambling dens, with longer terms of imprisonment. Despite these stringent laws, illegal gambling is pervasive in Thailand, flourishing in underground establishments and, increasingly, through online platforms. The government has made efforts to modernize its approach, with recent discussions in 2025 and 2026 around legalizing casinos in integrated resorts and regulating online betting to curb illegal activities and generate state revenue, but as of now, the 1935 Act remains the supreme law of the land.