TSI International School (TSI)
Key Stats
Annual Fees: US$7K – US$11K
Curriculum: British
Age Range: 2–18
Students: 400
Location: Samut Prakan, Bangkok
Updated February 2026
In Brief
TSI International School Bangkok (formerly Thai Sikh International School) is a well-established 40-year-old British curriculum school serving students aged 2-18 across two Bangkok campuses. While teacher discussions reveal it as a tier-3 school with concerns about high staff turnover and management issues, parent reviews are notably positive, praising it as excellent value for money in Bangkok's competitive international school market.
Founded in 1985 as Thai Sikh International School and recently celebrating its 40th anniversary in 2025, TSI operates two campuses in Bangkok - the Bearing Campus serving ages 2-18 and the Wongwianyai Campus for children aged 2-11. The school opened a new Primary School at Bearing Campus in August 2025, expanding its capacity. Following the British National Curriculum through to IGCSE, AS and A Level examinations, TSI serves a diverse community representing over 30 nationalities. The school maintains a family-oriented atmosphere that appeals to parents seeking a close-knit international education environment.
Teacher discussions on Reddit paint a mixed picture of working conditions, with educators describing TSI as a tier-3 school experiencing high staff turnover and management challenges. Teachers report that colleagues have shared negative experiences, though specific details about salaries remain unclear. However, parent reviews tell a different story, with families consistently rating the school as 'fantastic' and describing it as the 'best value school in Bangkok.' This disconnect between teacher and parent perspectives suggests TSI may offer good educational outcomes for students despite workplace challenges for staff.
What parents value
- –Strong parent satisfaction with families describing it as 'best value school in Bangkok'
- –Diverse international community with over 30 nationalities represented
- –Long-established history spanning 40 years with recent campus expansion
- –British curriculum pathway with IGCSE, AS and A Level qualifications
- –Family-oriented atmosphere creating close-knit school community
- –Two convenient Bangkok campus locations serving different age ranges
- –Recent investment in facilities with new Primary School opening in 2025
Points of consideration
- –Teacher discussions indicate tier-3 positioning with management and turnover concerns
- –Limited public information about fees, leadership, and specific academic outcomes
- –Minimal presence in typical Bangkok international school comparison discussions
- –No IB programmes offered, limiting curriculum pathway options
- –Teacher feedback suggests workplace challenges may affect staff stability
Annual Fees
| Year Group | Age | USDTotal Annual Fee |
|---|---|---|
| Pre-Nursery (Little Lions) | 2 | 7,488 |
| Nursery | 3 | 9,563 |
| Reception | 5 | 10,967 |
| Year 1 | 5 | 11,747 |
| Year 2 | 6 | 11,747 |
| Year 3 | 7 | 11,747 |
| Year 4 | 8 | 11,747 |
| Year 5 | 9 | 11,747 |
| Year 6 | 10 | 11,747 |
| Year 7 | 11 | 11,747 |
| Year 8 | 12 | 11,747 |
| Year 9 | 13 | 9,625 |
| Year 10 | 14 | 9,968 |
| Year 11 | 15 | 9,594 |
| Year 12 | 16 | 9,968 |
| Year 13 | 17 | 9,594 |
Fees converted from THB. For the most up to date and accurate figures please double check with the school.
Additional Fees
| Fee | Amount |
|---|---|
| Admission Fee (Little Lions) | 1,560 |
| Admission Fee (Nursery - Year 6) | 2,808 |
| Admission Fee (Years 7-11) | 1,560 |
| Admission Fee (Years 12-13) | 936 |
| Deposit | 1,560 |
Photos
Academic Results
Academic results have not been made publicly available by this school.
Extra Curriculars
Contact the school for details on co-curricular activities and facilities. Ask what a normal week looks like outside lessons for your child's interests.
Inspections & Accreditations
Inspection
No published inspection details are currently available.
Accreditations
Accreditation details are not publicly listed.
Memberships
Membership details are not publicly listed.
Student Body
Bangkok's international schools serve a diverse community of expat and local families. Contact the school for current enrolment details.
Leadership
Mr. Graham Lonie - Head of School
Graham Lonie joined TSI International School in June 2017 during its renewal process, holding key positions to support growth before becoming Head of School in 2025.
