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Charter International School

(โรงเรียนนานาชาติชาร์เตอร์)

Verified by Viktoriya Lindner in May 2026
฿

1st-Year Total

฿422K–฿781K

All-in estimate

Curriculum

British

A-Levels, IGCSE

Level of Education

2–18 yo

Nursery → High School

Language of Instruction

English

+ 2 more languages

Students

500

Across all ages

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.

1st Year Tuition Fees (2025–2026)The school hasn't published 2026–2027 fees yet. We're displaying 2025–2026 rates as a reference; these may be updated once the new figures are released.

Estimated cost for any age group entering this school

Admission & Enrollment฿137,000 – ฿187,000
Application Fee฿2,000
Registration Fee฿100,000 – ฿150,000
Seat Reservation Fee฿25,000
Security Deposit฿10,000
Annual Tuition฿285,000 – ฿594,000
Total 1st Year Estimated฿422,000 – ฿781,000
(฿10,000 refundable)

Tuition fees (2025–2026)

AgeGradeAnnual Tuition
2–3Daycare฿285,000
3–4Nursery฿432,000
4–5Reception฿432,000
5–6Year 1฿496,500
6–7Year 2฿496,500
7–8Year 3฿496,500
8–9Year 4฿496,500
9–10Year 5฿496,500
10–11Year 6฿496,500
11–12Year 7฿564,000
12–13Year 8฿564,000
13–14Year 9฿564,000
14–15Year 10฿594,000
15–16Year 11฿594,000
16–17Year 12฿594,000
17–18Year 13฿594,000

What You Should Actually Know About Charter International School

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.