Ruamrudee International School (RIS)
International School in Bangkok
Quick answer
Ruamrudee International School (RIS), founded 1957 in Minburi, Bangkok, serves 1,146 students from 23 nationalities aged 3 to 18. The school delivers an American curriculum integrated with the IB Diploma Programme at upper school within a Catholic-heritage framework (motto Ad Astra — 'to the stars'). Accredited by WASC, CIS and IBO. Tuition $12,000-$22,000 per year. Long-established premier choice for diplomatic and corporate expat families in Bangkok.
Key facts
- Curriculum: American leaving qualifications include IB Diploma and AP and TOEFL and PSAT.
- Tuition: $12,000–$22,000/yr published annual range.
- Avg class size: 10 (max 12) Bangkok international school · 1,146 students total.
- 23 nationalities top: Thai.
- Ages: 3-18 school day starts at 7:10am.
- Accreditations: WASC, CIS, IBO verified.
1,146
23 (Thai)
10 avg / 12 max
Rolling
WASC, CIS, IBO
IB Diploma and AP and TOEFL and PSAT
About Ruamrudee International School (RIS)
Ruamrudee International School is a private, non-profit day school that provides an interfaith, inclusive, and academically rigorous education for students to be balanced, successful, and compassionate individuals. Established in 1957, it was the first school in Thailand to achieve WASC accreditation. Emphasis on values and character education is a hallmark of learning at RIS. Our students are encouraged to achieve their full potential while developing skills and attributes that help them become responsible global citizens and contributing members of society.
| Item | Amount |
|---|---|
| Annual tuition (USD) | $12,000 – $22,000 |
| Annual tuition (local) | 548400 ฿-1442000 ฿ |
| Fee year | 2025-2026 |
| True annual cost (with hidden fees)how we calculate | $19,200(+13%) |
| First-year total (with registration + deposit) | $20,700 |
| Cost position in Bangkok | 88th percentile(premium tier) |
Hidden costs & fee notes
American curriculum with AP courses. Catholic heritage. Mid-range pricing. Registration THB 100,000. Uniforms THB 5,000-8,000. Bus THB 30,000-50,000/year. ECA THB 10,000-30,000/year.
American
IB Diploma and AP and TOEFL and PSAT
MAP, PSAT, SAT, IB, AP, and TOEFL
Our students excel in examinations. We average 100 points higher than US students on the SAT and 2 of our IB Diploma students scored a perfect score this year when there were only 160 perfect scores worldwide. Our students are consistently offered entrance into top universities around the world.
Japanese, Mandarin, French, Spanish, and Thai
The Special Education Program is designed to take into account the wide diversity of individual characteristics, interests, abilities, and learning needs. It will include parents, teachers, counsellors, and care givers at every stage and in all plans that are made to meet the student's educational needs. Equality of opportunity for all students is essential and it is important that students with special needs have the opportunity to learn along side their peers. For this reason, special education needs of students will normally be met in the mainstream classroom setting.
Yes. Our Special Needs Program is overseen by our Director of Student Services, one of our school psychologists.
Yes - Our English Language Development Program recognizes that all students represent multiple levels of proficiency in the English language. RIS offers a combination of sheltered classes, study support classes, and push-in support for subject areas. Daily study support is also offered to help students keep pace with their core subjects and to provide the opportunity to review and practice the basic components of the English language.
7:10am – 2:40pm
Yes. We have a diverse offering of independent service providers.
Yes
Recommended neighborhoods
Minburi, Ramkhamhaeng, Lat Krabang
Is Ruamrudee International School (RIS) right for your family?
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At a Glance
Fee Position in Bangkok
Mid-rangeSchool Profile
Class Size
Student Diversity
Moderately diverse
Common: Thai
Estimated Real Cost
Tuition + registration, transport, uniform, exams
American curriculum with AP courses. Catholic heritage. Mid-range pricing. Registration THB 100,000. Uniforms THB 5,000-8,000. Bus THB 30,000-50,000/year. ECA THB 10,000-30,000/year.
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