That is also what my embassy informed me about in 2023.
The tax on my pension is covered by the DTA, so I get taxed on it in Belgium. But if I remit it to Thailand, and the tax scale in Thailand is higher than Belgium, I will pay the difference in Thailand.
Of course there was no mention of what happens if the tax scale in Thailand is lower.
And now, my pension isn't taxed in Belgium, because I'm below the threshold. I receive annually about 500K baht pension.
What happens if I remit this to Thailand, as i believe the threshold for being tax free is much lower here