Originally Posted by
transpac
Foreigners entering Thailand under the Tourist Visa Exemption category must possess adequate finances for the duration of stay in Thailand (i.e., cash 10,000 Baht per person and 20,000 Baht per family).
Glad I didn't know about that rule as until now, as I didn't carry much cash with me on my twice a year trip to BKK (average over last 10 years).
Now that they charge 500 Baht to use an ATM, I do take about $1,000, so if my math is right, I'd be OK in the unlikely event that they asked to see how much cash I have.
There's also a rule that you need to have a forward ticket, and on my first naive trip I had an open jaw IAH-BKK MNL-IAH that I closed by purchasing a ticket in Thailand, yet neither the airline nor Immigration gave it a second thought.