If I stay for 90 days in Thailand, then fly out to Malaysia for a week, then I repeat the above process 1 more time in a year ,
, and I do this every year, do I still need to pay tax to Thailand ?
TLDR : Answer Summary
If you spend a total of 180 days in Thailand within a year, you qualify as a tax resident, regardless of how often you leave the country. However, whether you must actually pay taxes depends on your individual income situation and potentially applicable double tax treaties with Thailand.