It seems to be impossible to find reliable information on what is considered thai-sourced income vs. foreign-sourced income in the context of the DTV for the workcation people.
If you have an employer back in your home country, the money gets already taxed at source, so it's likely you could just get tax credit for that in Thailand. Or do it the other way round: Pay taxes in Thailand and then claim back the withholding tax from your home country's tax authorities.
But what about freelancers? Because there is no withholding tax, so you basically get exactly the amount you earn and everything is untaxed the moment you receive it.
For the most part, the definition of "locally sourced" income is always "the place where the work was performed, even if the clients are abroad".
This is really just to satisfy my curiosity, really. In Malaysia for example, on the DE Rantau visa, if you work in Malaysia but all your clients are overseas, it's still considered Malaysia-sourced. For the DTV, all I ever read is "foreign-sourced income is only taxable if you stay more than 180 days and only if it's brought into Thailand", which never really answers the question of "sourced income".
Anybody with experience?