True Annual Cost · Koh Samui
True annual cost of international schools in Koh Samui
Updated 2026-04-26 · 7 schools with full cost data · 7 schools indexed
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7 international schools in Koh Samui have full cost data published. Median published tuition is $6,396 USD per year, while median true annual cost — modeled with first-year charges (capital levy, registration) plus recurring extras (transport, uniform, technology, activities) — runs $7,896 USD, a median 23% above each school’s own tuition. Cheapest with full cost data: Oonrak Koh Samui School at $4,453 USD/year true cost. Most expensive: International School of Samui at $17,115 USD.
True-cost dataset · Source: Official international-school fee schedules + IBO, COBIS & CIS accreditation registries · Last verified Apr 27, 2026 (5 months ago) · Verify fees, admissions, and current enrollment directly with the school's admissions office.
Key facts
- 7 schools with full cost data published tuition + WhereNext-modeled true annual cost (registration, transport, uniform, activities).
- Median tuition: $6,396/yr published headline tuition midpoint.
- Median true cost: $7,896/yr a median ~23% above each school's own tuition.
- Cheapest: Oonrak Koh Samui School $4,453/yr true annual cost.
- Most expensive: International School of Samui $17,115/yr true annual cost.
Schools ranked
7
Median tuition
$6.4k
Median true cost
$7.9k
Median hidden fees
+23%
Curriculum mix
Schools ranked by true annual cost (cheapest first)
| # | School | Tuition USD | True cost |
|---|---|---|---|
| 1 | Oonrak Koh Samui School | $3,194-$3,611 | $4,453 |
| 2 | École Privée Française à Koh Samui | $2,778-$4,722 | $4,800 |
| 3 | Lamai International School | $3,750-$5,000 | $5,425 |
| 4 | Windfield International School Koh Samui | $5,241-$7,550 | $7,896 |
| 5 | Greenacre International School | $5,250-$7,833 | $8,042 |
| 6 | PBISS International School | $7,492-$12,479 | $11,486 |
| 7 | International School of Samui | $13,746-$17,183 | $17,115 |
How we calculate true cost
The True Annual Cost takes the school’s mid-point USD tuition and adds city-calibrated extras for transport, uniform, registration recurrent, lunch, technology fee, and activity fees. The number is scaled by tier — premium-tier schools tend to charge proportionally higher capital levies and ancillary fees than budget schools.
Read the full True Annual Cost methodologyInternational school costs in Koh Samui — FAQ
How much does international school really cost in Koh Samui?
Across the 7 international schools in Koh Samui with full cost data, the median true annual cost is $7,896 per year (median published tuition is $6,396). Across individual schools, true cost runs a median 23% above each school's own tuition once first-year charges (capital levy, registration) and recurring extras (transport, uniform, technology, activities) are modeled in.
Why is the true cost higher than the published tuition in Koh Samui?
Published tuition is only the headline number. WhereNext models the additional charges a family typically faces — first-year items like capital levy and registration, plus recurring extras such as transport, uniform, technology and activity fees. In Koh Samui these add a median 23% to each school's own tuition (some schools more, some less).
What is the cheapest international school in Koh Samui by true cost?
Among the 7 schools in Koh Samui with full cost data, Oonrak Koh Samui School has the lowest true annual cost at $4,453 per year, while International School of Samui is the highest at $17,115 per year. Schools without published cost data aren't ranked.
Best value in Koh Samui
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All schools in Koh Samui
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