For whom it may concern: I did my annual (retirement) extension at Chiang Mai immigration yesterday. Arrived at 7:30 and got cue number 11. Number was called at about 9:30 and my stamped passport was returned at 10:30. I used the bank method and was not informed about any new rules or minimal balance to be kept for the next months/year. I made sure that in the past 3 months the balance wasn’t under 800K. All in all a painless process and quite a step up from the experience in the past years. Btw my wife did her extension as dependent at the same time and the little over 800K in my account sufficed for that one as well.