Status checked 22 August 2026. A great deal of coverage says the THIM app became compulsory for foreign nationals this month. It did not, and if you are arriving soon the difference is worth two minutes.
Source Immigration Bureau, THIM rollout; TDAC requirement unchanged In force August 2026
The full analysis is for Silver members. Silver membership is THB 1,490 per year and includes every legal briefing in full, as it publishes.