lol 'send them on their way' - I think you might be new here. But you don't seem to be grasping, they don't have to come to you, at least once a year you have to go to them. The annual extensions mean we're a captive audience for compliance purposes. It would be the simplest thing in the world to tie tax to extensions. It doesn't take Stephen Hawkins to see how. You go to immigration and they ask for a statement from your bank showing all monies sent from abroad and an accompanying tax receipt. Similarly to the credit advice, just another piece of paper from the bank to say Joe Bloggs shipped it 'x' baht in the last 12 months. Tick that box, extension granted, fail to tick it off you either go and get it or no extension. I haven't been sucked into anything, IF this comes to fruition I'm already aware of roughly how much it would mean to me, and it's not enough to keep me awake, but for those, like yourself who think you're going to spend more than 180 days here and be immune to the tax spotlight at some point, I still maintain at extension time, are dreaming. We shall see.
What is going to be fascinating is the culmination of 200+ DTA's converging on Thailand at once and the general public expecting Thailand to have them nailed. I doubt a single days seminar has been set up to help them. Also I don't know when the Australian tax year end is but in the UK it is April, when you would receive proof you have paid tax on your income. However that date in Thailand is December, meaning for January, February and March you won't be able to prove any tax paid in your home country to the thai tax office. If as I suspect, tax dues will be tied to visa extensions, I just can't see any other way of enforcement, then that is going to be a car crash, possibly with the thais, snowed under by expats coming at them from all angles clutching different DTA's, demanding you cough up in order to obtain your extension and then when proof arrives claim it back! I think it's bordering on extreme optimism for anyone thinking their countries DTA is going to get you through the fog. Picture the scene, someone rolls up a Madagascan native and the thais are supposed to know the details of the Thailand/Madagascan DTA? No chance. The sheer complexity of this may make them just shelve it, who knows.
Yes I understand that, but think through my scenario, its just impossible to do. Further example, you legitimately take out your taxed savings, walk into a casino and put it on red and black comes up. It's gone. You then do your columbian drug deal which goes well, and you bring that cash in and say its from your savings. Looks legit right? There is just no way you can prove a funds source.
So you've picked on the tax free allowance but swerved the very large list of allowances which dwarfs the UK pittance. Doesn't a 50% CGT discount mean you're paying a 50% CGT charge?