If you're planning for retirement visa you need first some for non o visa once here, 15 days before it expires, you need to prepare and transfer the money to apply for it. If your not ready can apply for 30 extension.
Generally 90d should be made in the same province as you got your visa, otherwise you need to change your address, jomtien refused 2 weeks ago to do it if I didn't do address change first, since ” you belong to bangkok"
They'll do the transfer at the same time, 4 more forms to fill in the same information and a lot of stamps.
I think it's important that there is a letter in the old passport, from the embassy starting the number of old and new passport, then they can do the transfer, to show that they are connected. I did some months ago.
Personally I hear much about Bangkok immigration not being friendly, but I have no trouble and maybe they go by the book instead of by the cokor of wallet?
You go to then with prints certified by bank. In Bangkok most bands have besides. It needs to be ordered same day to show you have the money.
For retirement visa,, you get 90. Says first, it can be money transferred recently, but to get1 year extention the amount 800k need to be in the bankbook 2 months.
I'm thinking your wanted visa is closet to that than whatever Andrew says.
Read online to find em specific intimation for your visa.