Choosing an international school in Thailand

Bangkok has a large concentration of international schools, with further options in Phuket, Chiang Mai and the Eastern Seaboard. Published sources cite 166 nationally regulated schools and 105 Bangkok directory entries. Those figures come from different sources and should not be combined into a precise market share or treated as live counts. ↗

Schools enrol both Thai and internationally mobile families. The reviewed Shrewsbury profile reports a roughly 75% Thai share at Riverside in its dated school profile; the mix differs by campus and says little about admission pressure.

The secondary 2026–27 NIST listing reaches THB1,132,800 in annual tuition. Shrewsbury’s 2026–27 range reaches THB1,256,700 for Year 12 at Riverside. Joining payments and other charges are separate. These examples describe particular schedules, not a ranking of value or a direct comparison with Singapore. ↗

Plan housing around a suitable school place and the journeys your family will make. In Bangkok, compare Sukhumvit, Bang Na, Nichada Thani/Nonthaburi and the riverside area using actual campus addresses; neither a central location nor a smaller city guarantees a short journey.

The Office of the Private Education Commission (OPEC) handles international-school licensing within the Ministry of Education system. ONESQA provides national external quality assessment. Ask the school for the current licence and relevant review documents, checking that they cover the campus you are considering. ↗

The International Schools Association of Thailand describes overseas accreditation requirements, including a five-year timeframe for new schools. Use its guidance to frame questions about a school’s status and review dates. Accreditation, candidacy, inspection and association membership are not interchangeable, and not every school has met every rule. ↗

Read the licence, accreditation status and dated inspection findings together. A newer school may be working through a review process, so ask what stage it has reached. Credentials are a baseline; teaching, support and subject provision decide the fit.

British pathways include IGCSEs followed by A levels at Harrow and Shrewsbury, or IB options at Bangkok Patana. NIST offers the IB Primary Years, Middle Years and Diploma programmes. ISB’s American-based provision includes IB and AP options alongside its high-school diploma. Other schools include Ruamrudee and QSI; compare the specific programme rather than assuming curriculum labels determine a university destination.

The curriculum guide explains qualification differences and transfer considerations. External accreditation is useful evidence, but it is separate from authorisation to offer a particular curriculum programme.

The following examples use different academic years. The linked school profiles explain the sources, additional charges and unresolved questions:

• Bangkok Patana: 2025–26 tuition of THB495,000 for Nursery to THB975,000 for Year 12, plus a THB250,000 first-child entrance fee, THB30,000 annual capital assessment and separate refundable deposit.
• NIST: secondary-listed 2026–27 tuition of THB650,200–1,132,800. The cited charges include THB265,000 registration and a choice of THB575,000 refundable capital deposit or THB60,500 annual fund payment.
• Shrewsbury: the combined City and Riverside tuition range is THB669,600–1,208,400 for 2025–26 and THB696,300–1,256,700 for 2026–27. The low end is City Campus Nursery, not Riverside. A THB225,000 place fee and separate refundable THB225,000 deposit apply under the cited terms.
• ISB: 2025–26 tuition of THB640,000–1,162,000, plus THB260,000 registration. The cited annual bus bands are THB108,000–172,800; obtain the current route-specific quote.
• Harrow Bangkok: 2025–26 tuition of THB553,100–1,037,100, with THB225,000 admission and a separate refundable day-pupil deposit. Older boarding rates should not be combined with this schedule as a current package.

Lower-cost options should be compared using the same age group, programme and full invoice. Ruamrudee’s cited tuition range is THB538,400–786,000; request the relevant year and grade. At any school, separate application and entrance fees from refundable deposits and tuition advances. NIST’s refundable capital deposit, for example, is money tied up rather than an annual expense.

Phuket options include British International School, Phuket, UWC Thailand and HeadStart. The secondary fee guide gives BISP tuition around THB470,000–935,000 or more for 2026–27, UWC figures of THB345,000–933,000 and HeadStart figures of THB347,000–540,000. These are starting points for enquiries: confirm the academic year, age band, campus, current senior programmes and whether boarding is additional. Do not infer a complete boarding package from a tuition range. ↗

Chiang Mai options include Chiang Mai International School, Lanna International and Grace International. Published sources describe American provision at CMIS and British provision at Lanna. Citywide claims about lower prestige, lower cost or shorter journeys are too broad to guide an individual family. ↗

Rugby School Thailand, opened in 2017 in Chonburi, offers British schooling with boarding. Families considering the Eastern Seaboard should compare current boarding ages and packages, transport and school-break arrangements with their actual home and work locations. ↗

This guide uses school publications, published schedules, the Thailand Board of Investment’s reproduced school data and regional directories. The linked Bangkok profiles provide fuller detail. Regional examples are starting points; their fees and programmes change year to year.

Our editorial standards explain how sources are used. Send outdated details and supporting documents through corrections.