Prem Tinsulanonda International School (Prem/PTIS) — desk review

Fees and trajectory

Published fee today: ฿416,000 – ฿814,000 ([O] Official fees).

Recorded history: 2021 midpoint ฿542,000 → 2025 midpoint ฿589,500 (+8.8%). Points are real observations, never interpolated.

That midpoint sits at the 100th percentile of North schools publishing fees in North (n=21).

Admissions reality

Early Years to Grade 12

Rolling admissions (school states enrolment is open throughout the year, subject to availability in the appropriate year group)

Campus tour arranged via the enquiry form to suit your schedule

Who it fits — and who it does not

• Families set on the IB pathway — it is a recorded curriculum family here.
• Families who need boarding — boarding is offered.
• Families for whom budget is not the first constraint — its midpoint sits above the North median.
• Families whose children fit its span (3–19, EY–G12) — check the top year before shortlisting.

• Not a fit if the budget ceiling is hard: the published range tops out at ฿814,000 per year.