Charter International School
โรงเรียนนานาชาติชาร์เตอร์
฿397K – ฿756K
Including Admission Fees and Annual Tuition
British
Curriculum
A-Levels, IGCSE
2–18
Age
Nursery › High School
English
Language
Also taught:
500
Students
30 nationalities
30% foreigners
Charter is one of the most genuinely international schools in Bangkok, and that distinction is deliberate. With over 25 nationalities in the student body and a community that is roughly split between Thai and international families, the school has built an identity around intercultural learning rather than a single national curriculum tradition. It runs the English curriculum from Nursery through to Cambridge IGCSE and A-Levels (ages 3 to 18), and operates as an official Cambridge examination centre.
Class sizes are kept small, which families consistently point to as one of the school's strongest practical advantages. The school describes itself as a family school, and the pastoral culture backs that up: student wellbeing and intercultural acceptance are embedded rather than bolted on.
Fees run from roughly 280,000 to 590,000 THB annually, making Charter one of the more accessible Cambridge-pathway schools in Bangkok offering a full Nursery to Sixth Form route. The campus is on Chaloem Phrakiat Ratchakan Thi 9 Road in Prawet, eastern Bangkok, close to On Nut and accessible from the Outer Ring Road. No BTS or MRT directly serves the site; families drive or use the school bus. For families in eastern Bangkok who want a Cambridge curriculum, small classes, and a school where their child will be one of many nationalities rather than a minority, Charter is consistently underrepresented on shortlists relative to what it offers.
CISB Fees
Admission & Enrollment
฿112,000 – ฿162,000(฿10,000 refundable)
one-time fees
Annual Tuition
฿285,000 – ฿594,000
depends on year group
Total 1st year
Including Admission Fees and Annual Tuition
฿397,000 – ฿756,000
Admission & Enrollment
฿112,000 – ฿162,000(฿10,000 refundable)
one-time fees
Annual Tuition
฿285,000 – ฿594,000
depends on year group
Total 1st year
฿397,000 – ฿756,000
Including Admission Fees and Annual Tuition
Tuition Fees (2025–2026)
On this page
Key Facts
British
Curriculum
English
Language
500
Students
30+
Nationalities
30%
Foreigners
08:00 – 14:45
School Day
20
Avg. Class Size
25
Max Class Size
1:8
Teacher / Student
2003
Founded
For Parents
Charter International School is a small, independently owned British-curriculum school in the Prawet district of southeast Bangkok, founded in 2003 and catering to students aged 2 to 18. The school's academic pathway runs from Early Years Foundation Stage through Key Stage 1, 2, and 3, leading to IGCSE in Years 10 to 11 and Cambridge International A Levels in Years 12 to 13. It positions itself as an all-through school with manageable class sizes, which enables teachers to maintain close knowledge of individual students.
Fees sit at the more accessible end of Bangkok's British-school market, making it attractive to families seeking a credible British qualification pathway without the capital-levy burden of larger institutions. The Thienprasiddhi family, founders of the Plengprasiddhi Kindergarten group, established Charter with the explicit intent of extending their Thai-owned education network into the international space, and the school's administrative building was designed to mirror the family's historic Baan Si Chom Phu home on Silom Road.
Day-to-day learning at Charter draws on the English National Curriculum, supplemented by the International Primary Curriculum in the primary years, and enriched with specialist teaching in Thai, Mandarin (from Year 3), music, PE, and swimming throughout KS1 and KS2. Secondary students work in mixed-ability homeroom groups through KS3 before choosing from eight to ten IGCSE subjects in Years 10 to 11, covering sciences, humanities, languages, arts, business, and computing. The Learning Support and EAL department operates a tiered intervention model: students with limited English proficiency are placed in structured group sessions and returned to mainstream classes as proficiency develops, with the cost of EAL support already included in the published school fee.
The CIS and WASC joint accreditation visit of May 2023 specifically commended the school's intercultural learning, child safeguarding system, and student-centred teaching practices. The campus sits on roughly ten acres in Prawet and includes a 500-seat theatre, two indoor basketball courts, a half-Olympic swimming pool, science labs, music practice rooms, and a dance studio. Charter draws students from more than 30 nationalities, though its location in southeast Bangkok, far from the Sukhumvit and Sathorn expat corridors, means it is less convenient for families based in the city's western districts.
The recent introduction of the MRT Yellow Line (Suan Luang Rama 9 station) has improved transport access to the Prawet area. The school suits families residing in the Prawet, Bang Na, or On Nut areas, or those based near Suvarnabhumi Airport. The small school size of just over 500 students is a genuine differentiator: it enables a community atmosphere and personalised support, but also limits subject breadth at A Level compared to larger British schools. Best for Thai and international families living in southeast Bangkok who want an affordable, accredited British education with solid IGCSE and A Level outcomes and a family-oriented school culture.
Facilities
Extracurricular Activities
25+
activities per term
Accreditations & Memberships
Address & Contacts
36 Chaloem Phrakiat Ratchakan Thi 9 Road
Prawet, Prawet · Bangkok 10250
Admissions
General Inquiries
CISB Fees
Admission & Enrollment
฿112,000 – ฿162,000(฿10,000 refundable)
one-time fees
Annual Tuition
฿285,000 – ฿594,000
depends on year group
Total 1st year
Including Admission Fees and Annual Tuition
฿397,000 – ฿756,000
Admission & Enrollment
฿112,000 – ฿162,000(฿10,000 refundable)
one-time fees
Annual Tuition
฿285,000 – ฿594,000
depends on year group
Total 1st year
฿397,000 – ฿756,000
Including Admission Fees and Annual Tuition
Tuition Fees (2025–2026)
Key Facts
British
Curriculum
English
Language
500
Students
30+
Nationalities
30%
Foreigners
08:00 – 14:45
School Day
20
Avg. Class Size
25
Max Class Size
1:8
Teacher / Student
2003
Founded
For Parents
Charter International School is a small, independently owned British-curriculum school in the Prawet district of southeast Bangkok, founded in 2003 and catering to students aged 2 to 18. The school's academic pathway runs from Early Years Foundation Stage through Key Stage 1, 2, and 3, leading to IGCSE in Years 10 to 11 and Cambridge International A Levels in Years 12 to 13. It positions itself as an all-through school with manageable class sizes, which enables teachers to maintain close knowledge of individual students.
Fees sit at the more accessible end of Bangkok's British-school market, making it attractive to families seeking a credible British qualification pathway without the capital-levy burden of larger institutions. The Thienprasiddhi family, founders of the Plengprasiddhi Kindergarten group, established Charter with the explicit intent of extending their Thai-owned education network into the international space, and the school's administrative building was designed to mirror the family's historic Baan Si Chom Phu home on Silom Road.
Day-to-day learning at Charter draws on the English National Curriculum, supplemented by the International Primary Curriculum in the primary years, and enriched with specialist teaching in Thai, Mandarin (from Year 3), music, PE, and swimming throughout KS1 and KS2. Secondary students work in mixed-ability homeroom groups through KS3 before choosing from eight to ten IGCSE subjects in Years 10 to 11, covering sciences, humanities, languages, arts, business, and computing. The Learning Support and EAL department operates a tiered intervention model: students with limited English proficiency are placed in structured group sessions and returned to mainstream classes as proficiency develops, with the cost of EAL support already included in the published school fee.
The CIS and WASC joint accreditation visit of May 2023 specifically commended the school's intercultural learning, child safeguarding system, and student-centred teaching practices. The campus sits on roughly ten acres in Prawet and includes a 500-seat theatre, two indoor basketball courts, a half-Olympic swimming pool, science labs, music practice rooms, and a dance studio. Charter draws students from more than 30 nationalities, though its location in southeast Bangkok, far from the Sukhumvit and Sathorn expat corridors, means it is less convenient for families based in the city's western districts.
The recent introduction of the MRT Yellow Line (Suan Luang Rama 9 station) has improved transport access to the Prawet area. The school suits families residing in the Prawet, Bang Na, or On Nut areas, or those based near Suvarnabhumi Airport. The small school size of just over 500 students is a genuine differentiator: it enables a community atmosphere and personalised support, but also limits subject breadth at A Level compared to larger British schools. Best for Thai and international families living in southeast Bangkok who want an affordable, accredited British education with solid IGCSE and A Level outcomes and a family-oriented school culture.
Facilities
Extracurricular Activities
25+
activities per term
Accreditations & Memberships
Address & Contacts
36 Chaloem Phrakiat Ratchakan Thi 9 Road
Prawet, Prawet · Bangkok 10250
Admissions
General Inquiries