American School of Bangkok (ASB) Sukhumvit
(โรงเรียนดิอเมริกันสคูลออฟแบงค็อก วิทยาเขตสุขุมวิท)
1st-Year Total
฿631K–฿1.04M
All-in estimate
Curriculum
American
AP, AP Capstone Diploma
Level of Education
2–18 yo
Nursery → High School
Language of Instruction
English
+ 7 more languages
Students
620
At this campus
ASB Sukhumvit has been running since 1983, making it one of Bangkok's longest-established American curriculum schools. In 2022 the campus was acquired by XCL Education and rebranded as XCL American School of Bangkok, though it continues to operate under the ASB name. Pre-Kindergarten through Grade 12, over 40 nationalities, with an American curriculum built around Common Core, project-based learning, and an AP programme with over 20 AP courses at high school level.
The campus is on Sukhumvit Soi 49/3 in Watthana, walkable from Thong Lo BTS, one of the most central locations of any American curriculum school in the city. Facilities are urban and compact by Bangkok standards: modern classrooms, science labs, a gymnasium, swimming pool, and a sports complex, without the green-field space of the Green Valley campus. A boarding programme for students aged 13 and above is in development. Fees run from roughly 380,000 to 726,000 THB annually. For families in the Thong Lo, Ekkamai, or Phrom Phong corridor who want an American curriculum without a long commute, ASB Sukhumvit is the most practically located option in that part of the city.
1st Year Tuition Fees (2026–2027)
Estimated cost for any age group entering this school
Tuition fees (2026–2027)
What You Should Actually Know About American School of Bangkok (ASB) Sukhumvit
ASB Sukhumvit is the original 1983 campus of the American School of Bangkok, sitting on Soi 49/3 between Phrom Phong and Thong Lo. After XCL Education of Singapore acquired the school in late 2022, it now operates as XCL ASB Sukhumvit. The curriculum is American, Common Core aligned through Grade 12, with an Advanced Placement pathway covering more than twenty subjects and AP Capstone. There is no IB option here; families wanting the Diploma Programme typically look at the separately owned Green Valley campus or NIST.
Enrollment sits around 600 students across Pre-Kindergarten to Grade 12, making this a compact urban school rather than a large-campus operation. WASC accreditation, EARCOS membership, and Thai Ministry of Education recognition underpin its credentials. Classes typically hold 15 to 20 students, and the mix is unusually Asian for a Bangkok international school. Thai families make up roughly a quarter of enrolment, with substantial Japanese, Korean, and Chinese populations alongside American and European children from more than forty nationalities in total.
The English Language Learners program uses WIDA assessment and supports children from Grade 1 through Grade 12, which matters for families relocating from non-English-speaking countries. Lunch, Bangkok-area field trips, book rentals, and on-campus accident insurance are bundled into tuition. The campus packs a swimming pool, gymnasium, soccer pitch, science labs, music and drama studios, an auditorium, and the new ASB Plus boarding building for students aged 13 and up onto a small urban footprint near Samitivej Hospital and EmQuartier.
The trade-offs are real. The physical site is compact compared with ISB, Bangkok Patana, or NIST, outdoor space is limited, and there is no IB Diploma pathway. Tuition of around 476,000 to 836,000 THB per year is high without quite matching the top tier on facilities or independent academic ratings. The school is also still settling under XCL ownership and a recent leadership refresh. Best for families who want an American curriculum and AP route in central Sukhumvit, value smaller classes and structured English-language support, and prefer a setting where Asian expat communities are the norm rather than the minority; the new boarding wing also makes it a fit for regional families needing a weekday home base in Bangkok.