International School Bangkok (ISB) — desk review

Fees and trajectory

Published fee today: ฿659,000 – ฿1,197,000 ([O] Official fees).

Recorded history: 2019 midpoint ฿976,000 → 2024 midpoint ฿896,500 (-8.1%). Points are real observations, never interpolated.

That midpoint sits at the 96th percentile of Bangkok Metropolitan schools publishing fees in Bangkok Metropolitan (n=73).

Admissions reality

Pre-K1/Pre-K2/Kindergarten/Grade 1 placement strictly by age (3/4/5/6 years old on or before September 1 of enrolment year)

Thai stream: applications open September 15, deadline January 15, complete application due February 1, acceptances sent April (before Songkran); Dual/Expat stream: rolling admissions, may be admitted any time of year subject to seats; ED Visa stream deadlines February 1 (Semester 1) / August 1 (Semester 2); school year begins mid-August

Personalised campus tours booked via the admissions portal (on-site; virtual alternatives offered)

Getting there

Drive from Nonthaburi: about 10 min (free-flow estimate)

Drive from Chatuchak: about 19 min (free-flow estimate)

Drive from Ari: about 21 min (free-flow estimate)

Who it fits — and who it does not

• Families set on the IB pathway — it is a recorded curriculum family here.
• Families for whom budget is not the first constraint — its midpoint sits above the Bangkok Metropolitan median.
• Families whose children fit its span (3–18) — check the top year before shortlisting.
• Rail commuters — Nonthaburi Civic Center (MRT Purple) · 3.8 km is the nearest station ().

• Not a fit for boarding families — this is a day school in our records.
• Not a fit if the budget ceiling is hard: the published range tops out at ฿1,197,000 per year.