Foreign-Sourced Income

Yes, in Thailand, tax residents must pay taxes on their foreign-sourced income remitted to Thailand. This means if you’re considered a tax resident in Thailand—defined as someone who spends 180 days or more in the country in a calendar year—you must include your income from abroad in your annual tax return and pay Thai taxes on it. However, to avoid double taxation (paying taxes on the same income in both Thailand and the country where the income was earned), Thailand has tax treaties with many countries that allow for tax credits or exemptions. It’s important to consult a tax professional to understand how these treaties may apply to your situation and to ensure compliance with Thai tax laws while maximising available benefits.

You can learn more about Thailand’s new rules on foreign-sourced income here. 

For Thai tax residents, capital gains are calculated based on the gains realised when selling assets. This applies regardless of whether the investments were held before 2024. It does not follow the “cash in the bank” rule.