What matters is the actual monthly closing balance so if it goes down to 490k on the 10th of a month that won’t matter so long as the balance at the end of that month is at or above 500k THB.
The ask:thailand community, consisting of multiple Q/A groups with over 100,000 members, powers this platform. It is not an official government resource. Our members actively contribute to this resource, and while we strive for accuracy, we cannot guarantee its complete reliability. Assistance to travelers is provided as a community service.