I know that this has been covered by many but I am still getting confused. When I open a bank account in Thailand and deposit my 800K THB into the account. I will let it sit for 2 months before my renewal of an visa extension.

My questions is: If I do not touch the money and keep the 800K for one year and go for my next extension. Does Thai immigration look at the amount in the bank account or does it look at the account and check to see if it has oversea deposits transactions each month?

The account will not drop below 800K and some months it will not have any deposits.