Are expats in Thailand taxed on income sourced from outside the country?

Most countries have tax treaties

To pay taxes in Thailand you need to walk into the thai tax office and request a thai tax number you know how many thais dont pay taxes and will never pay taxes. Millions.

Reading the Bangkok Post usually makes me confused too. Cut/paste ‘journalism’ at best.

If you spend 180 days or more inside Thailand in a calendar year then you automatically become a Thai tax resident for that year. If during that year you bring assessable income into Thailand then that income is liable to thai tax and you need to complete a Thai tax return. What is assessable income varies by where your income comes from, what any Dual Tax Agreement between there and Thailand says etc. But earned income will invariably be assessable income. The article you reference is not currently the situation, it's talking about something that might or might not happen. You need to stick with the situation as it currently is.

The change to money earn outside of Thailand to nontax id because even Thai are not investing in Thailand so now no tax on money from outside of Thailand. Dint panic do as Thais do just wait and it will sort itself. Farang always try to preempt and stress for nothing. You are not a citizen of Thailand you are a citizen of your country and pay tax there

I think the confusion is coming because - The most recent new said they were thinking of changing rules and allowing tax residents a whole two year of remittance tax free ….after 2 year then you start to be taxed…..that’s what I read

Thailand is struggling and needs inflows of currency

Currently no legislation has been passed yet , so if you’ve been staying him more than 180 days, you were still legally obliged to pay tax for remittance (without double taxation treaties etc) …..but this legalization should hopefully come in soon

The official rules are that you're taxed on money remitted to Thailand if you're a tax resident. Income sourced outside of Thailand doesn't mean you sent it to Thailand. It's much more complicated with dual taxation treaties, but money earned does not equal money remitted.

It's not black and white. In theory, as per the law, some overseas income is supposedly to be taxed IF meeting certain conditions, such as being remitted to Thailand within certain period. In brief, blanket affirmations such as "all overseas income is to be taxed" or "no overseas income would be taxed" are both incorrect generalizations. Then, double taxation treaty with specific countries also play a role.