How can I switch my bank while ensuring my Non-O retirement visa requirements are met?

800k for a year??​ When did this happen? It's normally 3 months?

I tried and thought I could get away with it, but had to leave the country and reapply.

Wait why risk matters

Wait till after June

So you're in the period of time where your bank account cannot drop below 400,000.

So the way to do this to protect your next extension is like so:

Transfer 400,000 of your money to the new bank account. Let it sit for a few days so everything settles. Then transfer the 2nd 400,000 into the new bank account.

This is so you can show that you always had an account with at least 400,000 in it, which can get tricky if you transfer the full 800k and then it gets stuck in limbo for a day or two before clearing into your new account.

But you need to be aware that for your upcoming extension in June, you are going to need to get a bank statement for your Bangkok Bank account, a statement for your new bank account, and a bank letter for your new bank account.

This is so you can show that you met the requirements from your last extension up until you moved to the new bank account, then the information for the new bank account up until you got the new extension.