My observations are that Bangkok Bank does not deposit the funds into your account until after 2pm the next business day. This is different from last year when the funds went in instantly.
KBank, however, processes the funds straight away.
I’ve seen so many comments here… some, not so relevant.
My advice for you is:
1) Apply for a Non O Visa either from the Sydney Consulate or The Royal Thai Embassy in Canberra depending on where in Australia 🇦🇺 you live.
2) Get the eVisa, stamp in on a Non O. Immediately, go to your local Immi Office to find out the requirements for a 12 month extension.
3) With your Non O visa, go to a bank and deposit your 800,000B.
If you have had your 800,000B in an account for two months prior, you will be fine. (Cannot drop below 400,000B until two months before your next extension when it will have to be back up to 800,000B again )unless you opt for the 65,000B option.
4) Every time you leave Thailand on this Visa, you will need to complete a Re-entry Permit form.