For families choosing among the international schools in Phuket for an older child, the secondary phase is where qualifications and university pathways come into focus. Kajonkiet International Secondary runs the senior years of Kajonkiet International School Phuket on its Kathu campus, taking pupils through Cambridge lower secondary into IGCSE and then a Cambridge sixth form.
The phase offers a recognised English medium route to IGCSE and A Level at a mid tier price, which makes it a realistic option for relocating families who want their teenager on a familiar UK style track without the top tier island fees.
The secondary school at a glance
| Curriculum and exam boards | Cambridge lower secondary, Cambridge IGCSE (Years 10 to 11), then Cambridge AS and A Level (Years 12 to 13) |
|---|---|
| Stages | Year 7 to Year 13 (approximately age 11 to 18) |
| Language of instruction | English, with Thai, Chinese and Japanese taught |
| Founded | Around 2011 (whole school) |
| University pathway | Cambridge IGCSE and A Level, recognised by universities worldwide |
| Fee band | Mid tier for Phuket; senior and sixth form years at the top of the school's own range |
| Campus area | Kathu valley, Phuket |
Curriculum and academics
The secondary years open with a broad Cambridge lower secondary programme in Years 7 to 9 that builds the foundation for examination courses. In Years 10 and 11 pupils work toward Cambridge IGCSE, choosing from a spread of subjects across English, mathematics, the sciences, humanities and the creative arts, the qualifications most widely accepted by English speaking universities.
The sixth form in Years 12 and 13 follows Cambridge International AS and A Levels, the established academic route into selective universities, with subject choices shaped around each student's intended degree. Thai, Chinese and Japanese continue to be taught, and English as an additional language support remains available for pupils who need it. Families who would prefer the broader, six subject IB Diploma should note that Kajonkiet's sixth form is a focused A Level model, which suits students who want depth in three or four subjects rather than the IB's wider spread.
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Kajonkiet International Secondary fees
Kajonkiet International Secondary fees sit at the upper part of the school's own range, since secondary and sixth form tuition runs above the primary years. Our guide to international school fees in Phuket places the school in the island's mid tier, with the senior years approaching the top of its band but still below British International School Phuket and UWC Thailand.
The senior years carry extra costs beyond tuition. Beyond the admission and application fees and zoned transport, sixth form families should plan for examination entry fees in Years 11, 12 and 13 for the IGCSE and A Level series, which are charged per subject and can add up. English language support is billed where it applies. Bring tuition and these extras together with our fee calculator and confirm the live figures with admissions, since our bands reflect market tracking rather than a published price list.
Admissions
Secondary entry runs through the year, with the main intake at the August start of the academic year. Applicants provide recent school reports and sit an age appropriate assessment that gauges English level and academic readiness, which for sixth form entry means meeting the entry requirements for the chosen AS and A Level subjects.
Places in examination year groups are more constrained than in the lower school, so families relocating mid year should contact admissions early, especially for Years 10 to 13 where course choices and class sizes limit flexibility. Recent reports, any prior examination records, passports and visa paperwork are the documents to prepare.
Location and who goes there
The secondary phase shares the Kajonkiet campus in the Kathu valley, an inland setting about fifteen minutes from Phuket Town with the space for science, music and sports facilities that older pupils use. The location suits families in and around the town and Kathu, and means a longer commute for teenagers travelling from the western beaches.
The senior school draws a mixed Thai and international intake, which gives older students a broad peer group as they approach university choices. The Phuket city hub explains how the Kathu commute compares with the beach belt schools, and our guide to the best international schools in Phuket sets the secondary options side by side.
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Frequently asked questions
How much are Kajonkiet International Secondary fees?
Secondary and sixth form fees sit at the upper part of Kajonkiet's mid tier range. Our Phuket fees guide places the school in the island's mid tier overall, with examination entry fees added in the IGCSE and A Level years. Confirm current figures with the school.
Which qualifications does the secondary school offer?
Pupils take Cambridge IGCSE in Years 10 and 11 and then Cambridge AS and A Levels in Years 12 and 13, both widely recognised for university entry across the English speaking world.
What ages does Kajonkiet International Secondary cover?
The secondary phase runs from Year 7 to Year 13, approximately age 11 to 18, continuing from the school's primary years on the same Kathu campus.
Does Kajonkiet offer the IB Diploma?
No. The sixth form follows the Cambridge AS and A Level route rather than the IB Diploma, suiting students who want depth in three or four subjects.
When do secondary applications open?
Applications run year round subject to places, with the main intake at the August start of the year. Examination year groups are more constrained, so families relocating mid year should apply early.
