Do you need to show 500,000 THB in your bank when re-entering Thailand after 6 months?

No, you typically do not need to show the full 500,000 THB in your bank account when re-entering Thailand after 6 months. Instead, travelers may be asked to show proof of having at least 20,000 THB in cash or an equivalent amount in other currencies. This requirement generally applies to all arriving passengers and while immigration may occasionally check, many travelers report not being asked for these funds at all. It's advisable to have cash, a return ticket, and necessary documents ready, but bringing the entire amount in a bank statement is not necessary.