MagentaGrape4961 if you can get a 12-months bank statement from your Thai bank that confirms you have been transferring a minimum of 40,000 THB from abroad into your Thai bank account, month for month, not missing one single month, for the past 12 months, and your bankbook shows foreign transfers incoming, then MAYBE Immigration accepts it as a financial proof for the application to the 1-year extension. However, I must WARN you - first you should visit your Immigration and ask them if they are willing to accept it. As
@John *********
correctly noted, not every Immigration allows the 12-months of transfers method for froreigners married to a Thai wife (they will tell you that you must earn this income inside Thailand to get accepted).