International schools
International schools in Thailand for 2026/27: compare British, IB and American curricula, fees by city, admissions, extra costs and how to choose well.
For a family moving to Thailand with children, the school can shape the housing search more than the housing search shapes the school choice. A Bangkok campus may sit far from the neighbourhood that first looked convenient, while in Phuket the difference between a central, southern or northern campus changes the daily routine quickly. A good home is less useful if every weekday starts with a difficult school run.
Curriculum labels also need unpacking. A school described as British may lead from the English curriculum into IGCSE and then A-Levels, or it may switch to the IB Diploma in the final two years. An American school may award a US-style high school diploma while offering AP courses, IB courses, or both. For a younger child, language support and continuity can matter more than the badge; for a teenager, subject prerequisites and the exact leaving qualification can be decisive.
Fees are just as easy to misread. Published 2026/27 schedules from the schools checked for this guide run from the mid-hundreds of thousands of baht to more than THB 1 million a year, before some first-year and optional charges. Registration, capital or placement fees, deposits, buses, meals, uniforms, language support and external exams can change the real family budget materially.
The figures below are screening ranges built from representative official 2026/27 fee schedules checked on 31 August 2026, not a statistical survey of every international school in Thailand. Always ask the school for a current grade-specific offer, the complete first-year invoice and written confirmation of a place before making a housing or relocation commitment.
Representative 2026/27 anchors from KIS and Harrow; schools group early-years ages differently. The middle figure is a screening anchor, not a market median.
Low: 749,000
Typical: about 880,000
High: 1,015,000
Anchors from Bangkok Patana, Harrow and ISB; not a market-wide minimum or maximum.
Low: 842,000
Typical: about 1,000,000
High: 1,197,000
The checked 2026/27 schedules show premium Bangkok tuition clearly above THB 1 million.
HeadStart and BISP 2026/27 anchors; other schools and programmes can sit outside this range.
HeadStart provides the lower anchor in this sample, while BISP is higher; compare one-off charges as well.
Premium upper-school tuition in Phuket can come close to expensive Bangkok options.
Combines Regents with Rugby School Thailand's broad PN–Year 2 fee category, so age bands are not perfectly like-for-like.
Representative Regents and Rugby School Thailand anchors; fee inclusions differ.
Pattaya is not automatically a low-cost option at upper-school level; premium tuition approaches THB 1 million.
Official 2026/27 CMIS and Lanna anchors; request a fresh invoice before payment.
The checked sample sits below premium Bangkok, but Chiang Mai still has a wide internal spread.
Official CMIS and Lanna 2026/27 anchors; other curricula and boarding models may price differently.
Schools use different labels and many of these charges are non-refundable.
Refund rules vary. Lanna lists a THB 13,000 refundable equipment deposit, BISP a THB 150,000 bond, and Harrow a THB 200,000 refundable day-student deposit.
Published route anchors from Lanna, KIS and ISB; distance, zone and journey pattern change the bill.
Only applies where additional support is assigned or selected; programme design and charging rules vary.
Low: not always extra
Typical: 35,000–65,000
High: subject-dependent
Regents publishes THB 35,000–65,000 for IGCSE, A-Level and IBDP exams depending on subjects; other schools use different inclusion rules.
Low: school-specific
Typical: budget separately
High: varies by grade and programme
There is no market-wide tariff. Some schools include meals, materials or examinations in tuition while others bill them separately. Ask for a complete first-year cost sheet, including uniform.
Ask the next school what it will require, and maintain home-language or home-system subjects separately if needed.
Check subject and grade requirements for the exact course and university.
College requirements and policies for advanced-course credit vary.
Avoid unnecessary curriculum switches; continuity often matters more than chasing the most internationally branded option.
The checked Chiang Mai and some Phuket anchors start lower, but premium Phuket and Pattaya overlap Bangkok pricing at older ages.
Confirm the real weekday commute and bus coverage before making a long housing commitment.
Bangkok offers the deepest curriculum choice, but it also contains the highest tuition anchors in this review. Families can choose schools offering IB programmes, US-rooted pathways with AP and—in some schools—IB options, and English-curriculum schools leading to IGCSE, A-Levels or the IB Diploma. In the published 2026/27 schedules checked here, primary tuition at major schools starts around the mid-THB 700,000s and premium upper-school tuition reaches THB 1,197,000. The city-wide label is misleading, though: campuses are spread across very different parts of the metropolitan area, so the home-to-school route needs its own decision.
Phuket has fewer large international schools, but the price spread is still substantial. HeadStart lists THB 480,000 for Years 1–6 and THB 540,000 for Years 7–13 in 2026/27, while British International School Phuket (BISP) reaches roughly THB 983,000 in the upper years. The academic routes differ too: BISP moves from the English curriculum and IGCSE into the IB Diploma, while other schools may continue toward A-Levels. That choice can determine whether north, central Phuket or another part of the island is practical for the family.
Pattaya should not be treated as a guaranteed budget alternative. Regents follows a British and international route and lets sixth-form students choose between A-Levels and the IB Diploma; Rugby School Thailand is a British day and boarding school near the city. In the 2026/27 schedules used here, older-year tuition runs from roughly THB 727,000 to THB 999,000. What matters is the exact school, what its fee includes, and whether boarding or transport changes the family budget.
Chiang Mai provides lower starting points in the sample while still offering distinct pathways. Chiang Mai International School (CMIS) is a US-style school with AP, Lanna follows a British route, and Prem offers the full IB continuum. The 2026/27 CMIS and Lanna anchors used for screening run from roughly THB 342,000–413,000 in early years to about THB 580,000–803,000 in upper secondary. Campuses are not concentrated in one neighbourhood, so a lower tuition figure does not remove the need to test the real commute.
Marketing leans heavily on terms such as international, IB, Cambridge or American without making the authorised programme and leaving credential easy to identify.
Admissions can describe the brand but cannot clearly state the exact programme stage or graduation credential.
Check the relevant awarding organisation's official directory and ask the school to name the leaving credential in writing. For AP, check approved courses rather than assuming the whole school is an AP programme.
The advertised number excludes registration, admission, placement, deposits, transport or required support.
The family cannot obtain a grade-specific list of compulsory charges before applying.
Ask for the complete first-year and continuing-year cost before paying non-refundable fees or choosing housing.
General availability is discussed before assessment, while the exact year-group seat is still conditional.
The family is encouraged to sign a lease or pay a non-refundable housing commitment before receiving a written school offer.
Treat the seat as confirmed only when the school issues a formal offer naming the grade, campus, start date and payment conditions.
An attractive average is quoted, but the specific class may be near capacity or language-support places may be limited.
The school will not explain the maximum class size or support capacity for the child's level.
Ask for the current and maximum class size and how learning or English support is staffed for that year group.
A broad claim about global university access replaces a discussion of the actual diploma, subjects and prerequisites.
No one can map the child's senior-school subjects to likely university requirements.
Work backwards from plausible universities and courses, then check the leaving credential, subject menu and counselling support.
The fastest way to make a school choice expensive is to choose the home first and discover the commute afterwards. I want to understand the child's next few academic years before I compare school badges, because changing curriculum at nine is not the same decision as changing it in the middle of an examination course. Published tuition is useful for screening, but a new family's first invoice can look very different once registration, deposits and transport are added. I also would not treat a verbal 'space available' message as a confirmed seat. For planning purposes, the useful documents are the current grade-specific invoice and the school's written offer.
Updated: 31.08.2026
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