The main international schools in Bangkok compared on published fees, curriculum and age range — British, IB and American — using ESG directory data, not a ranking.
ExpatSchoolGuide lists 38 international schools in Bangkok. Published annual tuition across the 37 schools that state a fee runs from about US$6,000 at the lowest-fee schools to about US$35,000 at the highest, with most established all-through campuses sitting between US$10,000 and US$30,000. The British curriculum is the most widely available, followed by the IB and American programmes. The schools covered below are the largest and longest-established campuses in the city across those three curricula, chosen so that a family new to Bangkok can see the main options side by side.
This is not an ESG ranking and no school pays to appear here. ExpatSchoolGuide does not inspect schools, score them or publish a league table, so nothing on this page should be read as a judgement that one school is better than another. What we do publish is verified factual data held in our directory: curriculum, age range, published annual tuition and location, taken from each school's own information. Where a school does not publish a figure, we leave it blank rather than estimate it. Use the sections below to understand the landscape, then compare the full list on the Bangkok fee table and the city directory.
Bangkok's international schools offer a wide range of curricula. The British curriculum (IGCSE and A-Levels) is the most widely available, offered by schools such as Bangkok Patana, Harrow, Brighton College, Wellington College and Denla British School. These schools follow the English National Curriculum and prepare students for IGCSE and A-Level examinations. The International Baccalaureate is the second most common option, with schools including NIST, KIS, Concordian and Shrewsbury offering IB programmes, several of them the full continuum from the Primary Years Programme through to the Diploma. The American curriculum, usually with Advanced Placement courses in the senior years, is offered by schools including International School Bangkok, Ruamrudee International School, VERSO International School and Wells International School. A number of smaller schools offer bilingual or blended international programmes, and several campuses run both a British lower school and an IB Diploma in the sixth form.
Bangkok Patana School is Thailand's oldest British international school, founded in 1957, on a large single campus in the Sukhumvit area. It follows the English National Curriculum through to IGCSE and A-Levels and takes students from ages 2 to 18. Facilities include swimming pools, a performing arts centre, science laboratories, design technology workshops and extensive sports provision. Published annual tuition is around US$18,000 to US$30,000, with the lower end covering early years and the upper end the final school years.
NIST International School is Bangkok's longest-established full IB World School, offering the complete International Baccalaureate continuum — PYP, MYP and Diploma Programme — since 1992. It sits centrally in Sukhumvit and takes students from ages 3 to 19. NIST suits families who want the IB from early years right through to university entry without changing curriculum. Published annual tuition is around US$19,000 to US$28,000.
Harrow International School Bangkok is part of the Harrow family of schools and one of the few Bangkok campuses offering boarding alongside day places. Located in the Don Mueang area, it follows the British curriculum through IGCSE and A-Levels for ages 2 to 18, with a House system, boarding houses and extensive sports and performing arts facilities. Published annual tuition is around US$22,000 to US$35,000, the highest band we list in Bangkok.
Shrewsbury International School Bangkok is the overseas sibling of Shrewsbury School in England and occupies a riverside campus on the Chao Phraya. It takes students from ages 3 to 18 and offers British lower-school teaching with an IB pathway in the senior years, alongside well-developed performing arts and music provision. A separate City Campus serves younger children, ages 2 to 11, in central Bangkok. Published annual tuition at the riverside campus is around US$20,000 to US$33,000.
Brighton College Bangkok is the Thailand campus of Brighton College in England. It follows the British curriculum through IGCSE and A-Levels for ages 2 to 18 on a purpose-built campus with a theatre, swimming pool, innovation lab and science laboratories. Published annual tuition is around US$16,000 to US$28,000.
Wellington College International Bangkok opened in 2018 as part of the Wellington College group. The purpose-built campus includes a performing arts centre, aquatic centre, sports complex and design studios. It follows the British curriculum through IGCSE and A-Levels for ages 2 to 18, structured around Wellington's aptitudes and values framework. Published annual tuition is around US$18,000 to US$30,000.
St Andrews International School has served expatriate families in Bangkok since 1996 and operates more than one campus in the city, including a Sukhumvit campus. It offers British curriculum teaching with both IGCSE and IB Diploma pathways for ages 2 to 18, which gives families a choice of senior-school route without moving school. Published annual tuition is around US$12,000 to US$22,000, placing it in the city's middle fee band.
KIS International School is an IB World School in the Ratchada–Rama 9 area offering all three IB programmes — PYP, MYP and Diploma Programme — for ages 3 to 18. It is a mid-sized school by Bangkok standards, which some families prefer to the largest campuses. Published annual tuition is around US$14,000 to US$24,000.
Bangkok has a genuine lower-fee tier that many families overlook. Schools we list with published annual tuition starting below US$10,000 include TSI International School, Ramkhamhaeng Advent International School, Trinity International School Bangkok, Traill International School, Ascot International School, Anglo Singapore International School, St Stephen's International School, Singapore International School Bangkok, International Pioneers School and Kensington International School, which covers ages 1 to 11 only. Curricula, age ranges and campus size vary considerably across this group, so compare them directly on the fee table rather than by price alone.
Across the 37 Bangkok schools in our directory that publish tuition, annual fees run from about US$6,000 to about US$35,000. Broadly, schools below US$10,000 are smaller campuses with more modest facilities; US$10,000 to US$18,000 covers a large middle group including St Andrews, Bromsgrove, KIS, Wells and Denla British School; and US$18,000 and above covers the largest all-through campuses such as Bangkok Patana, NIST, Shrewsbury, Harrow, Brighton College, Wellington College and International School Bangkok. Tuition is not the whole cost: registration, capital or building levies, transport, lunches, uniform and examination entry are normally charged separately. We publish what each school states and leave a figure blank where the school does not publish one.
With 38 international schools to consider, start with curriculum: decide whether British (IGCSE and A-Levels), IB or American (AP) best fits your child's learning style and your likely university destination. Location matters enormously in Bangkok, where traffic can add an hour each way; a school near your home, your workplace or a BTS or MRT station saves significant time, and many families choose housing around the school rather than the other way round. Check the age range carefully, since several Bangkok schools stop at 11 or 15 and would mean a second move later. Admissions usually require previous school records, an age-appropriate assessment and a family interview, and the largest campuses can have waiting lists for particular year groups, so apply six to twelve months ahead where you can. Finally, ask each school directly about accreditation, examination results, class sizes and the total first-year cost including extras.
Bangkok offers one of the widest ranges of international schooling in Asia, from small lower-fee campuses to large all-through schools with boarding. Rather than working from a ranking, compare the schools that actually match your curriculum, budget, age range and commute, then contact your shortlist directly. Our Bangkok directory and fee table let you compare all 38 schools on the same data.