What are the requirements for a retirement extension visa at Korat Immigration regarding the 800k bank balance?

For obtaining a retirement extension visa in Thailand, particularly at Korat Immigration, the official requirement states that you must have 800,000 THB in the bank for at least 2 months prior and 1 month after the application period. Alternatively, it's also allowed to maintain the 800k balance for 3 months before the application. However, it’s crucial to maintain a balance above 400,000 THB for the remainder of the year, ensuring it returns to 800,000 THB at least 2 months prior to the next application. It's noted that different offices may interpret these rules variably.