Australian International School Bangkok Soi 20
(โรงเรียนอักษัรานานาชาติ)
1st-Year Total
฿423K–฿616K
All-in estimate
Curriculum
Australian
Level of Education
1–7 yo
Nursery → Primary
Language of Instruction
English
+ 6 more languages
Students
220
At this campus
AISB Soi 20 is the founding campus of Australian International School Bangkok, and it does one thing: early years, done well. Serving children from 18 months through Year 1 (ages 18 months to around 6), the campus follows the Australian Early Years Learning Framework 'Belonging, Being and Becoming', a play-based, inquiry-led approach that prioritises curiosity, belonging, and social development alongside early academic foundations.
Class sizes run 15 to 18, the community is tight-knit, and some families live close enough to walk. The campus is nestled in a residential pocket of central Sukhumvit, at 162/2 Sukhumvit Soi 20 in Klong Toey, within easy reach of Asok and Phrom Phong BTS. A daily shuttle connects Soi 20 to the Soi 31 campus, where children continue from Year 2 through to A-Levels.
The pathway is designed as a seamless progression, not a school change. Fees for early years run from roughly 322,400 THB annually, accessible by Bangkok international school standards for a central Sukhumvit location. For families in the Asok, Phrom Phong, or Thong Lo corridor with children under 6, Soi 20 is the entry point to a full Australian curriculum pathway without leaving the Sukhumvit area.
1st Year Tuition Fees (2025–2026)The school hasn't published 2026–2027 fees yet. We're displaying 2025–2026 rates as a reference; these may be updated once the new figures are released.
Estimated cost for any age group entering this school
Tuition fees (2025–2026)
What You Should Actually Know About Australian International School Bangkok Soi 20
The Australian International School Bangkok Soi 20 Campus is the founding early years site of AISB, opened in 2002 on a quiet side soi off Sukhumvit between Asok and Phrom Phong BTS stations. It takes children from 18 months in Nursery through Year 1, after which pupils move up to the larger AISB Soi 31 Campus that runs to Year 12.
The teaching model is Australian, anchored in the national Early Years Learning Framework known as Belonging, Being and Becoming, and delivered through play-based, inquiry-led pedagogy by native English-speaking staff supported by Thai assistants. AISB describes itself as a boutique school, with around 900 pupils across both campuses and roughly 220 at Soi 20, drawn from about 60 nationalities.
Class caps sit between 14 and 18 children depending on year level. Day to day, the campus feels closer to a small kindergarten than a school complex: a covered swimming pool, water play area, undercover all weather field, music and movement room, art and design studio, cooking room, and a green outdoor play area with swings sit inside a single Sukhumvit plot. Attendance options are flexible for Nursery through PreK2, with three, four, or five day weeks available, and Foundation and Year 1 run full time. Thai is compulsory across all year levels; English support is structured through a paid EAL pathway capped at six pupils per session, with general or intensive timetables. S
ports facilities for older siblings live at Soi 31, and a free shuttle van runs between the two sites for siblings. Trade offs are real. The campus has no boarding, no diploma pathway, and no formal scholarship programme, only a 5 percent prepayment discount and tiered sibling reductions. EAL placement is decided by Head of School and charged on top of tuition, so families arriving with limited English should plan for the added cost. Bus zones reach across central Bangkok, but pricing climbs sharply once you sit outside the Asok to Phrom Phong core. Best suited to expatriate and Thai families who want an Australian curriculum, play based start within walking distance of the Sukhumvit residential core, with a clear runway into the AISB Soi 31 secondary track.