Bangkok Patana School vs Harrow International School Bangkok
🇹🇭 Bangkok · Side-by-side comparison on verifiable public data.
Reviewed by Priscilla Han
Which should you choose?
Both run British, so the difference is inspection rating, boarding, and fees rather than the curriculum itself; Harrow International School Bangkok has a public inspection verdict (BSO "Outstanding") while the other sits in a market with no public inspectorate, judged on accreditation instead; Harrow International School Bangkok offers boarding while the other is day-only. The choice comes down to target curriculum, whether you need boarding, and budget — verify fees against each school's own figures.
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.
More Comparisons
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.
Questions parents ask
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 →