Bangkok Patana School vs Harrow International School Bangkok
🇹🇭 Bangkok · Side-by-side comparison on verifiable public data.
Harrow International School Bangkok holds a public inspection verdict (BSO "Outstanding"), while Bangkok Patana School operates in a market with no public inspectorate — the former has a verifiable official quality anchor, the latter is judged on accreditation depth. One practical difference: Harrow International School Bangkok offers boarding while the other is day-only — decisive for families who need a residential option. Verify current fees against each school's own figures (see the table below).
Key Facts
| Bangkok Patana School | Harrow International School Bangkok | |
|---|---|---|
| Curriculum | British / IB | British |
| Ages | 2–18 | 18 months–18 years |
| Languages of instruction | English | English |
| Annual fees | THB 525,000–1,005,000 | THB 136,800–1,037,100 |
| Enrollment | 2,302 | 1,713 |
| Boarding | Day only | Yes |
| Inspection rating | — | BSO: Outstanding |
| Accreditations | CIS, FOBISIA | CIS, FOBISIA, HMC, ISAT, BSO |
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
- ✓Published BSO 'Outstanding' (Grade 1) rating, March 2023 — Ofsted-quality-assured, verbatim band, the rare Outstanding-equivalent that earns top inspection tier
- ✓The original Harrow international school (1998) with the strongest brand heritage of any Harrow Asia campus
- ✓Genuine, well-developed boarding provision (boarding village, multiple houses) — uncommon in Bangkok
- ✓Strong inspection-verified academics: outstanding English/maths/science attainment, A*–A-heavy A-level and IGCSE outcomes (2023)
- ✓Documented EAL support: the BSO report records 1,590 EAL pupils receiving provision and making strong progress
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: tuition runs up to THB ~1.04M/year, with boarding adding THB 445,600–557,200 — among the most expensive options in Bangkok
- !For-profit ownership: operated commercially by AISL Group under franchise license, not an independent non-profit foundation
- !Not IB: families wanting the IB Diploma must look elsewhere — the offering is strictly British IGCSE/A-Level
- !Latest published BSO inspection is 2023; no newer independently published rating confirmed
- !Academic results are inspection/school-reported, not annually re-verified by an external body
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
- • Families seeking a genuine British boarding experience in Asia (day option also available)
- • Families prioritising a verified 'Outstanding' inspection record and A-Level/Oxbridge-style university pathways
- • Internationally mobile or regional families wanting weekly or full boarding
- • Those who value the Harrow brand heritage and traditional House System
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 for current year. The 2023 BSO report stated A-Level results were 'outstanding' with almost all pupils achieving A*–A grades and 65% of IGCSE entries at A*–A, with pupils 'securing places in prestigious universities worldwide.' No independently verified, current-year university-destination list is public.
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Frequently Asked Questions
Should I choose Bangkok Patana School or Harrow International School Bangkok?
Bangkok Patana School is best for: Families wanting a long-established, blue-chip British-into-IB pathway with strong continuity. Harrow International School Bangkok is best for: Families seeking a genuine British boarding experience in Asia (day option also available). 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 Harrow International School Bangkok?
Bangkok Patana School: THB 525,000–1,005,000. Harrow International School Bangkok: THB 136,800–1,037,100. Verify against each school's own published fees; some figures are sourced from third-party aggregators.
What curricula do Bangkok Patana School and Harrow International School Bangkok offer?
Bangkok Patana School: British, IB. Harrow International School Bangkok: British. Harrow International School Bangkok inspection: BSO "Outstanding".
Do Bangkok Patana School or Harrow International School Bangkok offer boarding?
Bangkok Patana School: day school only. Harrow International School Bangkok: offers boarding.
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 →