Bangkok

Bangkok is a genuine hundred-school market. Thailand has around 166 international schools regulated by the Office of the Private Education Commission (OPEC), and operational directories list roughly 105 of them in Bangkok alone — spanning British, IB, American, Australian, French, German, Japanese, Singaporean and Indian curricula. ↗

Every school sits inside a Thai regulatory stack. International schools are licensed by the Ministry of Education under OPEC, and all OPEC-regulated schools are externally assessed by the Office for National Education Standards and Quality Assessment (ONESQA). On top of that, Thai law requires every international school to hold accreditation from a recognised overseas agency — CIS, WASC, NEASC, COBIS and others — by the end of its fifth year of operation. ↗

The spread is the story. Bangkok’s sector runs from long-established not-for-profit flagships down to small “soi schools” — storefront-scale operations named after the side streets they occupy. Both are legal. The practical filter we recommend: ask any school for its OPEC licence, its ONESQA status and its current overseas accreditation (and when that accreditation was last renewed). The premium tier typically stacks three signatures — an institutional accreditor such as CIS or WASC, a programme authorisation such as IB World School status, and the ONESQA overlay.

Tuition spans THB 200,000 to over THB 1.2 million a year. Budget schools (Wells, KIS, the St Andrews campuses) cluster around THB 200,000–350,000 for primary; the mid-tier (Bangkok Patana, NIST, Ruamrudee) around THB 400,000–600,000; and the premium tier (ISB, Shrewsbury, Harrow, Bromsgrove) from THB 650,000 past THB 1 million in the senior years.

Bangkok Patana (British, not-for-profit, founded 1957 — Thailand’s oldest British international school) publishes 2025/26 tuition of THB 495,000 in Nursery rising to THB 810,000 in Years 7–9 and THB 975,000 in Year 12 — plus a THB 250,000 non-refundable entrance fee for the first child, a THB 50,000 refundable deposit and a THB 30,000 annual Capital Assessment Fee. IGCSE is followed by the IB Diploma in the sixth form. ↗

NIST International School (full IB continuum, not-for-profit, founded 1992) charges a THB 265,000 registration fee and then asks parents to choose: a refundable THB 575,000 Campus Development Deposit or a THB 60,500 annual Campus Development Fund payment. Tuition for 2026/27 runs from THB 650,200 in Kindergarten to THB 1,132,800 in Grades 11–12. ↗

Shrewsbury International School Bangkok charges THB 669,600–1,208,400 a year in 2025/26 depending on year group, plus a THB 225,000 non-refundable Guaranteed Place Fee and a THB 225,000 refundable deposit. Published 2026/27 fees rise to THB 696,300–1,256,700. ↗

Harrow Bangkok runs THB 553,100 (Pre-Nursery half day) to THB 1,037,100 (Years 12–13) in 2025/26, with a THB 225,000 admission fee. International School Bangkok (ISB) — the American-curriculum anchor — charges THB 640,000 (Pre-K) to THB 1,162,000 (high school) plus a THB 260,000 registration fee, and publishes distance-banded bus fees of THB 108,000–172,800 a year. ↗

Budget for the extras on top: application and assessment fees, EAL charges (Bangkok Patana’s is THB 105,000 a year for Years 1–9), exam-board fees in the IGCSE/IB years, uniforms, devices and transport. The first-year total at a premium school routinely lands THB 300,000–500,000 above headline tuition.

The not-for-profit anchors. Bangkok Patana (British-to-IB, Bang Na), NIST (full IB, Sukhumvit 15) and ISB (American, inside the Nichada Thani gated community in Nonthaburi, founded 1951 and the first school in Thailand to offer the IB Diploma) form the long-established core of most expat shortlists. All three are foundation-governed rather than owner-operated.

The British branded schools. Shrewsbury runs two campuses: the original Riverside campus on Charoen Krung (ages 2–18, roughly 1,900 students) and the City Campus near Rama 9 (primary only, opened 2018) — where completing Year 6 carries a guaranteed Year 7 place at Riverside, bypassing external admissions. ↗ Harrow Bangkok (founded 1998, the first Harrow in Asia, boarding available) sits in Don Mueang in the city’s north. Wellington College, Brighton College and King’s College International add newer UK-school options, and Bromsgrove, KIS, Regents and the St Andrews group round out the British middle.

Watch the map on Rugby School Thailand. Despite appearing on “Bangkok schools” lists, Rugby’s campus is in Bang Lamung, Chonburi — on the Eastern Seaboard towards Pattaya, well outside metropolitan Bangkok. It works as a boarding school or for families based on the Eastern Seaboard, not as a Bangkok day school. ↗

A note on demographics. Thai-citizen enrolment is substantial across the sector — Shrewsbury’s student body, for example, is reported at roughly 70% Thai. That is normal in Bangkok and shapes classroom culture, language balance on the playground and the admissions calendar; ask each school for its current nationality mix rather than assuming “international” means majority-expat.

In Bangkok, school choice follows housing — not the other way round. Peak-hour traffic makes cross-town school runs impractical for young children, so experienced families pick a cluster first and a school second. ↗

The four clusters that matter: the Sukhumvit corridor (NIST, St Andrews, Bangkok Prep and others along the BTS line through Asoke, Phrom Phong and Thonglor); Bang Na / Lasalle (Bangkok Patana and a growing eastern cluster, popular with families who want space and airport access); Nichada Thani (ISB sits inside the gated community itself — children bike to school, but the compound is 30–45 minutes from the central business districts in traffic); and the Riverside / Charoen Krung corridor for Shrewsbury families, reachable by river ferry as well as road.

Bus reality. Most schools run their own bus networks across the main expat areas, typically costing THB 40,000–90,000 per child per year; Bangkok Patana alone runs a fleet of over 100 buses from Bang Na. ISB publishes exact bands — THB 108,000 to THB 172,800 depending on distance. Ask any shortlisted school how long its longest regular route actually takes at 7am, not whether your neighbourhood is “covered”.

The calendar is August to June, with the main intake in August. Popular year groups at the flagship schools — early years entry and the Year 7 transition — can fill a full cycle ahead, and the sought-after schools assess rather than simply register. Apply from abroad; families who wait for arrival in Bangkok routinely find their first-choice year group full.

Mid-year entry is normal in a posting-driven city, and most schools admit in January and April where places exist. What mid-year entry does not suspend is the paperwork: previous school reports, assessment or interview (often available remotely), and — at schools with entrance or campus-development fees — the one-time charges, which are due in full regardless of when in the year you join.

One-time charges are not pro-rated. A THB 250,000 entrance fee or a THB 575,000 campus-development deposit costs the same whether your child joins in August or March. Families on short postings should price the full non-refundable stack per year of attendance, not per year of tuition.

These are recurring themes in expat-parent forums and community groups (r/Bangkok, ASEAN NOW/ThaiVisa and the Facebook parent groups) — reported experience, not verified fact:

“Visit at pickup time.” The single most repeated advice: a school’s prospectus never shows the 3pm reality of its soi. Traffic around the campus gates at drop-off and pickup tells you more about daily life than any tour.

“The second year is when fees bite.” First-year budgets focus on entrance fees; the renewal shock is the annual tuition uplift plus EAL, bus and activity charges compounding on top. Parents recommend asking admissions for the five-year fee history, not just the current schedule.

“Accreditation is the floor, not the ceiling.” Forum veterans steer newcomers away from judging small schools by websites alone — check the OPEC licence and the overseas accreditor’s own register, then talk to current parents. The gap between marketing and classroom reality is widest exactly where fees are lowest.

1. Fix the curriculum question first with our IB vs British vs American guide — Bangkok has flagship options in all three, so this decision genuinely comes first here.

2. Choose your cluster before your school — map the Sukhumvit, Bang Na, Nichada and riverside options against where you expect to live and work.

3. Pull each shortlisted school’s current fee schedule and model the first-year total including one-time charges, then the five-year total including likely uplifts.

4. Verify the regulatory stack — OPEC licence, ONESQA status, overseas accreditation and its renewal date.

5. Browse the wider region: compare with Kuala Lumpur, Ho Chi Minh City, Hanoi, Hong Kong and Singapore, or explore the school directory and guides.