@Michael *********
it all depends on where you have the bt400,000. Savanaket now requires the bt400,000, or equivalent, in your bank account somewhere. Not necessarily in Thailand, but in Thailand you need the bt400,000 in a Thai bank first. In either situation it is first a 90 day stamp, giving you enough time to get everything together to apply for your one year extension. It also depends on how many days you have left on your original entry stamp into the country. Usually somewhere between 15-21 days, but I'm not sure of the exact days as it can vary between immigration offices.