Originally Posted by EmailKid

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.