Bangkok Patana School vs International School Bangkok
🇹🇭 Bangkok · Side-by-side comparison on verifiable public data.
Neither Bangkok Patana School nor International School Bangkok sits in a market with a public inspectorate, so both are assessed on verifiable accreditation, curriculum authorisation, and published data rather than an official quality rating. Curriculum is the core differentiator: Bangkok Patana School offers British, IB while International School Bangkok offers American, IB — the choice should follow the family's target qualification system. Both are day schools with fees in the same market band — see the table below for the figures, and verify against each school's own published fees.
Key Facts
| Bangkok Patana School | International School Bangkok | |
|---|---|---|
| Curriculum | British / IB | American / IB |
| Ages | 2–18 | 3–18 |
| Languages of instruction | English | English |
| Annual fees | THB 525,000–1,005,000 | THB 659,000–1,197,000 |
| Enrollment | 2,302 | 1,700 |
| Boarding | Day only | Day only |
| Accreditations | CIS, FOBISIA | WASC, CIS, EARCOS, ISAT |
Strengths
- ✓True 2–18 continuity on one campus (Foundation Stage → IB Diploma), confirmed publicly
- ✓CIS accreditation and authorised IB World School — dual, independently verifiable institutional anchors
- ✓Genuine non-profit foundation governance (no shareholders; volunteer board) — verifiable, not marketing
- ✓Strong published 2025 IB outcomes (99% pass, avg 35) and IGCSE results
- ✓Dedicated EAL ('English as an Additional Language') staffing plus Home Languages and Inclusion programmes
- ✓70+ year track record as Thailand's first international school, with institutional stability and a large ~1,700-student community
- ✓Dual university pathways — both IB Diploma and AP available within one school, plus an ISB Diploma option
- ✓Strong published IB results: Class of 2025 average 34, top score 44, 16% scoring 40+
- ✓Deep accreditation: both WASC and CIS, plus IB authorisation
- ✓Diverse community spanning 60+ nationalities
Trade-offs
- !No published external inspection band (no BSO/ISI report) — assurance rests on CIS/IB accreditation alone, a weaker anchor than an inspected Outstanding rating
- !Very large (~2,300 students) — may feel impersonal to families wanting a small-school environment
- !Premium fees (up to ~THB 1M/year) place it among Bangkok's most expensive options
- !Curriculum switches from English National Curriculum/IGCSE to IB at sixth form — families specifically seeking A-Levels won't find them here
- !Cambridge vs Edexcel IGCSE board not clearly stated publicly
- !Premium fees: high-school tuition THB 1,197,000/year plus a THB 260,000 one-time registration fee place ISB at the top of the Bangkok market
- !EAL/ESL support is not described on public pages — families needing English-language support cannot verify provision
- !Located in Nichada Thani (Pakkret, Nonthaburi), well north of central Bangkok — a commute consideration
- !Exact campus size/acreage is not published
- !No boarding option, so it serves only families resident in the area
Best Fit For
- • Families wanting a long-established, blue-chip British-into-IB pathway with strong continuity
- • Internationally mobile families valuing CIS + IB recognition and EAL support
- • Students who will thrive in a large, resource-rich, activities-heavy environment
- • Parents who value transparent non-profit governance
- • Expatriate and internationally mobile families wanting a stable American-curriculum school with US university orientation
- • Students who want to choose between IB Diploma and AP routes within a single school
- • Families already living in or near the Nichada Thani / northern Bangkok area
- • High-achieving students targeting selective North American and global universities
University Placement
School-reported · not independently verified
No university-destination/placement data was found on public sources; any such claims would be school-reported and unverified.
School-reported, unverified: ISB reports Class of 2025 matriculation including Stanford, Cornell, UC Berkeley, UCLA, NUS, UCL and University of Toronto. ISB offers AP rather than A-Levels; 277 AP exams were completed in 2025. Figures are school-published and not independently verified.
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Frequently Asked Questions
Should I choose Bangkok Patana School or International School Bangkok?
Bangkok Patana School is best for: Families wanting a long-established, blue-chip British-into-IB pathway with strong continuity. International School Bangkok is best for: Expatriate and internationally mobile families wanting a stable American-curriculum school with US university orientation. The right choice depends on target curriculum, budget, and family priorities — the two are not linearly comparable.
How do fees compare between Bangkok Patana School and International School Bangkok?
Bangkok Patana School: THB 525,000–1,005,000. International School Bangkok: THB 659,000–1,197,000. Verify against each school's own published fees; some figures are sourced from third-party aggregators.
What curricula do Bangkok Patana School and International School Bangkok offer?
Bangkok Patana School: British, IB. International School Bangkok: American, IB.
Do Bangkok Patana School or International School Bangkok offer boarding?
Bangkok Patana School: day school only. International School Bangkok: day school only.
This comparison is BrightKey's independent assessment using verifiable public data only. University-placement figures are school-reported and not independently verified. BrightKey takes no payments from schools. Our method →