This is how I understand it from my experience. You can't use monthly income for your first 12 month extension which I am guessing is based on retirement.
When you deposit
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0 baht in a thai bank account in your name only it has to be there two months before you apply for your extension. Following that it has to stay at
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0 baht for three months after you get your extension. Following that it must not drop below
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0 baht at any time during the year. These are the financial requirements for your first extension. If you wish to use monthly transfers you must start them when you get your first extension so you have to have the deposit as described above in addition. However these monthly deposits must show as international transfers into your Thai bank. This can be problematic but Bangkok bank is the best I know for achieving this. You can spend the monthly deposit or send it back where it came from using Dee Money. When you apply for your second extension you must show that you have met the criteria for your first one and 12 months of bank statements showing the deposits as
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baht a month or a combination of banked money and monthly statements totaling
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0 baht. That is how you change from banked money to monthly transfer. Personally though it does not make good investment sense I find it less stressful to just keep
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0 baht in a locked account and use that to get my annual extension. I hope that explains it for you. Good luck.
I am quite happy to be corrected if any of the above is wrong or incomplete as it could be helpful to me too.
I have been warned tm30.io is not an official immigration site after I registered on it. I am still not sure all is above board but I'll find out soon enough when I do my 90 day report this week.
I registered at tm30.io but you need to upload house books and owner id card first. Then upload your passport. I have recently been told that it is not an official immigration site but a private company so I dont know if it will be recognised or not. I will find out next week when i do my 90 day report.