My tax rate in my home country, where I have a secondary domicile, would be 5% lower and capital gains are not taxed. But the even bigger issues for me are (1) documenting my Thai tax return would be a nightmare because the relevant documents are not in English , (2) it is technically impossible for me to file until March 31 because I have to wait for some tax relevant reports until mid-year, and (3) I could reclaim tax credits only two years in arrears when my foreign taxes will be officially assessed. However, I am quite relaxed because it will take Thailand many years to establish a working global tax system going along with rescinding the 180 days rule and I do not expect Thailand to become tax hell compared with some attractive western countries.