Siam International School
SIAMISUpdated July 2026
IGCSE
Siam International School is an international school in Pathum Thani, Thailand, providing a comprehensive education from nursery through to Year 13. It offers an academically rigorous curriculum, including IGCSE and A-Level qualifications, designed to prepare students for university pathways globally.
Curriculum
Teaching approach
Siam International School aims to inspire curiosity, nurture character, and build a foundation for lifelong success. It strives to be a caring community where every child is valued and encouraged to grow in confidence, compassion, and resilience. The school focuses on developing well-rounded individuals through a balance of academic rigour and personal development.
Programmes
The school follows the Oxford curriculum and offers a seamless educational journey from Nursery (ages 2–5) through to High School. The academic programme includes Primary education, Lower Secondary, and culminates in IGCSE and A-Level qualifications. Students can follow specific learning pathways, such as Business & Entrepreneurship, Science & Innovation, Technology & Digital Futures, Creative Arts & Media, and Global Humanities & Leadership.
Student support
Learning support
The school prioritises student wellbeing and safety, with a designated safeguarding lead overseeing the protection and support of all students. The educational approach emphasises personalised academic guidance and a nurturing environment to ensure students are emotionally secure and socially confident.
Frequently asked questions(5)
- What curriculum does Siam International School offer?
- Siam International School offers IGCSE and Cambridge A-Level.
- How much is tuition at Siam International School?
- Annual tuition at Siam International School is THB 246K–THB 480K. Fees vary by year group — confirm the current schedule with the school.
- What ages does Siam International School teach?
- Siam International School enrolls students aged 2 to 18.
- Is Siam International School a day or boarding school?
- Siam International School is a day and boarding school.
- Where is Siam International School located?
- Siam International School is an international school in Mueang Nonthaburi, Thailand.
Tuition & fees
Annual tuition by grade
2025-2026| Grade | Ages | Annual |
|---|---|---|
| Nursery | 2–4 | THB 246K |
| KG 1-2 | 5–6 | THB 246K |
| Year 1-6 | 6–11 | THB 360K |
| Year 7-9 | 11–14 | THB 420K |
| Year 10-11 | 14–16 | THB 450K |
| Year 12-13 | 16–18 | THB 480K |
Other fees(7)
| Application fee | THB 5K |
|---|---|
| Enrolment fee· One-time charge per family, regardless of the number of children enrolling. | THB 150K |
| Registration fee· Visa Assistance | THB 5K |
| Insurance· Covers student accident insurance benefits. | THB 1K |
| Uniform· Required; pricing available upon request. | — |
| Materials· Resource Fee: 21,000 THB for Nursery and KG 1-2; 30,000 THB for Years 1-13. | — |
| Meals· Lunch & Snacks: 21,000 THB for Nursery and KG 1-2; 30,000 THB for Years 1-13. | — |
Discounts
- Sibling discount: 100% discount on enrollment fee for subsequent children
Admissions
The admissions process begins with an enquiry or a visit to the campus in Pathum Thani. Prospective families are invited to meet with staff and have their child complete a short assessment to determine their learning level. Following the assessment, families submit an application form, receive an official offer, and confirm enrolment through the payment of required fees.
Calendar
The school operates on an academic calendar that includes the 2026–2027 academic year. Fees are structured on an annual basis, and the school requires all tuition and associated costs to be settled before the beginning of each term.
Facilities
About the campus
Located in Pathum Thani, the campus provides a secure and peaceful environment for students. Recent developments include the introduction of a boarding school programme, which offers modern accommodation for both local and international students. The school is currently undergoing a transformation of its facilities to support a student-centred structure.
Co-curriculars
The school offers a range of extracurricular activities, including robotics, mathematics, science, music, and football. New initiatives include a professional-level golf programme, a dance school for artistic expression, and a music school providing lessons and performance opportunities. These programmes are designed to foster creativity, teamwork, and discipline outside of the classroom.
Jan BothaPrincipalMr. Jan Botha is the new principal of SIAM International School, leading the school's transformation with a fresh vision and innovative direction. He brings decades of international teaching and administrative experience to his role.
- Sukanya WattanavichianDirector
Sukanya Wattanavichian serves as a director at the school, working alongside the new principal to lead the school's transformation and new initiatives.
Paul Jonathan GregoryHomeroom & Designated Safeguarding LeadPaul Jonathan Gregory is the Homeroom & Designated Safeguarding Lead (DSL). He brings many years of safeguarding experience from international school environments in Thailand and abroad to his role.