Cities / Bangkok / Siam International School (Siam IS)
Siam International School (Siam IS)
SISB operates five campuses across Bangkok following the British National Curriculum from nursery through A Levels.
In brief
Siam International School is a small school of around 250 pupils on the Rangsit–Nakhon Nayok road in Thanyaburi, Pathum Thani, about 46 kilometres from central Bangkok. Founded in 2003, it is accredited by WASC and recognised by Thailand's Ministry of Education, with Cambridge content as its international layer. Annual fees start at THB 288,000 in the early years and rise to THB 420,000 in primary.
Parents consistently mention small classes and teachers who give each child individual attention, and say their children are happy and grow noticeably more confident. They also credit the school with shaping behaviour at home around respect and responsibility. Its distance from the city means it suits families living in the north of Greater Bangkok.
Fees
Annual fees
| Year level | Age | Fee |
|---|---|---|
| Nursery (Tuition+Resource+Lunch) | 3 | THB 288,000 |
| KG 1 | 4 | THB 288,000 |
| KG 2 | 5 | THB 288,000 |
| Year 1 | 6 | THB 420,000 |
| Year 2 | 7 | THB 420,000 |
| Year 3 | 8 | THB 420,000 |
| Year 4 | 9 | THB 420,000 |
| Year 5 | 10 | THB 420,000 |
| Year 6 | 11 | THB 420,000 |
| Year 7 | 12 | THB 480,000 |
| Year 8 | 13 | THB 480,000 |
| Year 9 | 14 | THB 480,000 |
| Year 10 | 15 | THB 510,000 |
| Year 11 | 16 | THB 510,000 |
| Year 12 | 17 | THB 540,000 |
| Year 13 | 18 | THB 540,000 |
| Annual Insurance | THB 1,000 |
One-time fees
| Item | Age | Fee |
|---|---|---|
| Visa Assistance | THB 5,000 | |
| Application Fee | THB 5,000 | |
| Enrollment Fee (per family) | THB 150,000 |
Reviews
- The pool of online parent reviews is small and concentrated on directory sites. Tone is consistently warm rather than analytical.
- The repeated positive theme is small classes and individual attention, with parents saying their children are happy and noticeably more confident over time.
- Teachers are described as caring and professional, with parents crediting the school with shaping behaviour around respect and responsibility.
- Practical caveat: the campus sits in Pathumthani, around 46 km from central Bangkok, which constrains how relevant it is to families committed to inner-city Bangkok.
- Curriculum runs Kindergarten to Grade 6 only, recognised by Thailand's Ministry of Education, with Cambridge content as the international layer.
Positives
- Small classes, individual attention. Parents repeatedly cite small group sizes and visible teacher attention to each child.
- Character and behaviour. Parents describe positive behavioural change at home, attributed to the school's pastoral approach.
Considerations
- Location and scope. Pathumthani campus and primary-only provision narrow the audience; suits families in the north of Greater Bangkok.
Leadership
Jan Botha
Mr. Jan Botha is the newly appointed Principal of Siam International School, announced in August 2025. He holds a BBA degree. His background includes prior experience in international education, though specific details are limited in available sources.
Accreditations
- TH_OBEC 01
- Western Association of Schools and Colleges (Accrediting Commission for Schools) 02
Location
55/5 Mool, Rangsit-Nakhonnayok road, Bungyeetho, Thanyaburi, Pathumthani 12130, Thailand