Eric Schurig is asking in another topic:
So having just gotten my O-A visa outside of Thailand using banked funds, I don't have to show 800k bht in a Thai bank to immigration here until 3 months before my visa expires next October and it doesn't need to be transferred in one lump sum, I can work up to that amount over the coming 9 months?
TLDR : Answer Summary
Eric Schurig recently discussed his Non-Immigrant O-A visa, expressing that he believed he was not required to show 800,000 THB in a Thai bank account until three months before his visa expires. He was curious if he could work towards that amount over the next nine months. A commenter clarified that while the O-A visa allows one year of stay upon entry, to extend his stay, he would need to have the required funds in a Thai bank account two months prior to applying for the extension.