Harrow International School Bangkok vs International School Bangkok (ISB)
Side by side from CredRadar's verified dataset — every fee carries its source label. Last verified 2026-10-06.
Photo: Google MapsHarrow International School Bangkok
Don Mueang · Bangkok
Photo: Google MapsInternational School Bangkok (ISB)
Nonthaburi, Pak Kret (Nichada Thani) · Nonthaburi
In short
How they differ
- On published fees, Harrow International School Bangkok is the less expensive of the two: its range (฿146,300 – ฿1,063,000 / year) sits against ฿659,000 – ฿1,197,000 / year at International School Bangkok (ISB) — a gap of ฿134,000 at the top of the range and ฿512,700 at entry level.
- Curriculum: Harrow International School Bangkok lists British, IGCSE, A-Level; International School Bangkok (ISB) lists American + IB DP + AP. That difference — not the brand name — is what most affects transferability to your next school or university system.
- Only Harrow International School Bangkok offers boarding of the two (Yes). Boarding charges are additional to the tuition shown — see the boarding hub for published boarding rates.
- They are not in the same place: Harrow International School Bangkok is in Bangkok, International School Bangkok (ISB) in Nonthaburi — for most families that settles the commute question before fees do. Check both in the commute finder.
- Over 13 years at today's fees, the midpoint totals are ฿7,860,450 at Harrow International School Bangkok and ฿12,064,000 at International School Bangkok (ISB) — a difference of ฿4,203,550 before annual increases.
- History differs: Harrow International School Bangkok was founded in 1998, International School Bangkok (ISB) in 1951.
| Harrow International School Bangkok | International School Bangkok (ISB) | |
|---|---|---|
| Location | Don Mueang · Bangkok · Bangkok Metropolitan | Nonthaburi, Pak Kret (Nichada Thani) · Nonthaburi · Bangkok Metropolitan |
| Founded | 1998 | 1951 |
| Grades / ages | 18mo–18 | 3–18 |
| Curriculum | British, IGCSE, A-Level | American + IB DP + AP |
| Accreditation / notes | BSO Outstanding (Mar 2026, per Prestige) | WASC context |
| Annual tuition | ฿146,300 – ฿1,063,000 / year [O] Official fees Full fees breakdown | ฿659,000 – ฿1,197,000 / year [O] Official fees Full fees breakdown |
| Est. 13 years | ฿1,901,900 – ฿13,819,000 at today's fees, before annual increases | ฿8,567,000 – ฿15,561,000 at today's fees, before annual increases |
| Fee history (recorded) | +14.5% on recorded points, 2019/20 → 2025/26 (7 school years recorded) Fee history | +15.3% on recorded points, 2020/21 → 2024/25 (5 school years recorded) Fee history |
| Boarding | Weekly boarding 456,700/yr; full boarding 571,100/yr (2026/27) | No |
| Nearest rail station | 11th Infantry Regiment (BTS Sukhumvit) · 3.5 km straight-line | Nonthaburi Civic Center (MRT Purple) · 3.8 km straight-line |
| Google rating | No live Google rating (Google removed K-12 reviews in Apr 2025) | No live Google rating (Google removed K-12 reviews in Apr 2025) |
| School website | Visit website → | Visit website → |
Fees are the published annual ranges in our dataset (checked 2026-10-06); one-off enrolment charges, deposits and transport are additional — each school's fees page shows the published wording in full. Enrolment/student numbers are not shown because neither school publishes a figure we could verify in this pass.
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