KIS International School Bangkok
(โรงเรียนนานาชาติเคไอเอส)
1st-Year Total
฿946K–฿1.75M
All-in estimate
Curriculum
IB
IB CP Certificate, IB Diploma...
Level of Education
2–18 yo
Nursery → High School
Language of Instruction
English
+ 11 more languages
Students
800
At this campus
KIS is the only school in Bangkok offering all four IB programmes: PYP, MYP, Diploma, and Career-related Programme. That is not a marketing line; it is a structural distinction. Families who want the full IB Continuum in one place, from age 3 through to university entry, have very few options in Bangkok.
KIS is the most accessible of them. Founded in 1998 and located in Kesinee Ville on Pracha Uthit Road in Huai Khwang, the school sits in a gated residential estate in central-north Bangkok, well placed for families in the Huai Khwang, Rama 9, Ratchada, and Lat Phrao corridors.
Around 800 students from nearly 50 nationalities, with a community that is genuinely close-knit for its size. IB Diploma results are strong: an average score of 35 points, well above the global average of 30. The Career-related Programme is notably developed, with pathways in Sustainable Leadership, Sustainable Business, and Art and Design that allow students to earn university credits while still at school.
Fees run from 440,100 to 944,600 THB annually, with a refundable Development Fund of 250,000 THB or an Annual Development Fee of 45,000 THB as an alternative. The campus is not on the BTS or MRT; families drive or use the school bus. For families committed to the IB and looking for a school that delivers it across all four programmes in a community-driven environment, KIS is in a category of its own in Bangkok.
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 KIS International School Bangkok
As one of two campuses under the KIS International School organisation, KIS International School Bangkok (KIS) is a non-selective day school authorised to deliver all four International Baccalaureate programmes: the Primary Years Programme, Middle Years Programme, Diploma Programme, and Career-related Programme. That four-programme authorisation is rare; in Bangkok, KIS is the only school holding it.
Opened in 1998 as Kesinee International School and rebranded in 2003, the school sits in the mid-to-upper tier of Bangkok IB schools by tuition and by published outcomes, with the Class of 2024 averaging 35 points on the IB Diploma against a global mean of 30. Scale is deliberately modest at roughly 800 students from age 2 to Grade 12, accredited by the Council of International Schools and recognised by Thailand's Ministry of Education and ONESQA.
Day-to-day, the school reads more low-key than its fee bracket suggests. The published 1:8 student-to-teacher ratio shows up in classrooms that lean discussion-led and inquiry-based, with concept-based learning carried consistently across PYP and MYP. The international mix of around fifty nationalities prevents any single national group from dominating, and Thai is taught throughout to meet Ministry requirements.
Two concrete strengths stand out: an embedded EAL programme running from Early Years 3 through Grade 9, after which students must be fully mainstreamed, and a university counselling team that placed the Class of 2024 across 191 universities in 21 countries. The campus offers three pools, two libraries, science labs, a black box theatre, dance studios, and a Mac Lab, with a multi-year master plan extending construction through 2028.
Trade-offs are real. The Huai Khwang location is central on a map but unforgiving in traffic; families east or south of Sukhumvit will rely on door-to-door bus zones or the free MRT shuttle. The all-IB pathway means no IGCSE, no A-Levels, and no American diploma options, so families committed to alternative curricula should look elsewhere.
Ongoing renovations through 2028 will deliver substantial new facilities but also mean phased disruption in the interim. Boarding is not available at this campus. KIS International School Bangkok is best suited to families committed to the IB continuum from early years onward, comfortable with a mid-sized international community, and willing to absorb the Huai Khwang commute in exchange for small classes and proven Diploma results.