Entry is not residence
US tourist entry can support a research trip, but it is not a residence route
Current State Department guidance says a US passport must be valid for at least six months beyond arrival. Most US citizens do not need a visa for a stay under 60 days, although the Thai government has signalled that the period may change. Teachers, retirees, business travellers and anyone staying longer should confirm the correct visa before travel.
- 1
Check each adult and child passport separately and leave enough validity for the chosen long-stay application, not only the first flight.
- 2
Complete Thailand’s official pre-arrival registration and save the confirmation without relying on airport Wi-Fi.
- 3
Carry onward or return-travel and funds evidence if requested, then check the admitted-until date placed in the passport.
- 4
Choose the long-stay route for the real purpose: employment, study, family, retirement, remote work or another qualifying basis.
- 5
Map dependant status, spouse work permission, 90-day reporting and re-entry requirements before treating approval as a complete family plan.
