How can I switch from a Non O Retirement visa with 800k in the bank to a monthly income requirement for extension?

To switch from holding 800,000 baht in the bank under a Non O Retirement visa to a monthly income requirement for visa extension in Thailand, you must meet several conditions. First, ensure your Thai bank account holds the 800,000 baht for at least three months and does not drop below 400,000 baht thereafter. Then, you need to transfer a minimum of 65,000 baht into your Thai bank account each month for 12 consecutive months prior to applying for the next extension. It's important to plan ahead and to ensure the account is solely under your name unless supported by an income affidavit from your embassy.