What are the requirements for extending stay in Thailand based on marriage, specifically regarding the bank deposit?

Jonathan Pressburger So people are saying they will move the money to their home country when not needed for bank interest rather than leave in in a Thai account where you earn little or nothing. Let's say they cannot invest it in shares etc because they cannot afford to lose it they need to have it when the time comes so bank interest is a safe investment. It needs to be in Thailand for 3 months minimum to be safe so it appears on the statements. Let's say it is in their home country for 9 full months and they can get 4% interest. If I transfer 400,000 Baht today to the US today with Wise I am going to get 11,918.93 cents (assuming the receiving bank charges no fees. (11,918.93 X 4 %) * 9 /12 = 357.57 interest I will earn for the 9 months. Now I have 12,276 dollars in my foreign account. Now if I transfer this back to Thailand I will get roughly 408,000 baht. Of course I could get more if the rates have improved but I could also get way less if rates have declined. So in a perfect storm with no change in rates over 9 months I gain $276. If $276 dollars is worth that much to you , to go to all that trouble and risk not having the money at the time or not satisfying immigration that the money has come from the right place and been there for the right time then that's a bit sad. If you need to spend that 400K for immediate living expenses then where does it come from next year. It's far easier to accept you "MAY" lose $276 and just put it in the account and leave it where it is and you are already prepared for renewal without worrying about money. So let me clarify as yes maybe I did not word it correctly. I did not mean I'd light a match and burn 12K I meant what you can earn on $12K is really very little so if you have the means it is easier and wiser just to put the funds in place and leave them there.