How much do international schools cost in Thailand in 2026?

Bangkok holds the widest and most expensive market. Mid-to-premium British, US, and IB pathways commonly publish annual tuition near ฿450,000-900,000 in primary and middle years, with elite upper-school bands reaching about ฿880,000-1,200,000 at names such as Harrow Bangkok or International School Bangkok depending on year group. St Andrews and peer Nord Anglia campuses sit in the mid-to-high hundreds of thousands of baht before entrance fees. Housing beside those campuses drives Bangkok cost of living more than a national average does.

Chiang Mai usually offers lower starting points while still covering US, British, and full IB routes. Published anchors for campuses such as Chiang Mai International School, Lanna, and Prem commonly sit near ฿340,000-580,000 in early and middle years and roughly ฿580,000-800,000 in upper secondary, with some smaller international programmes below that. Commute still matters: Hang Dong, Mae Rim, and city-centre campuses are not interchangeable. Soften the rent line with Chiang Mai cost of living.

Phuket is not automatically cheaper. HeadStart and mid-island options can land near ฿350,000-500,000, while British International School Phuket secondary years can approach ฿960,000-980,000. Island logistics, school vans, and villa electricity still stack on top of tuition; see Phuket cost of living.

Registration or capital fees, refundable deposits, uniforms, bus routes, lunches, exams, and mandatory trips routinely add a large first-year load beyond headline tuition. Divide the full package by twelve when you build a monthly budget. Do not treat Thai daycare prices as a guide for Year 7: preschool detail sits in childcare costs.

Private hospital familiarity in Bangkok and Chiang Mai is strong, but school fees usually dwarf routine clinic spend. Keep medical insurance on a separate line in healthcare costs rather than assuming school extras cover paediatric care.

Pick the city only after you shortlist campuses you can actually reach without a two-hour van each way. A softer Chiang Mai tuition can still lose if the family needs Bangkok specialist hospitals every month or Phuket's beach lifestyle every weekend.