Bilingual, EP & trilingual schools

Thailand has no separate “bilingual school” licence. A bilingual school is a private school licensed by OPEC that delivers the Thai national curriculum partly in English under the Ministry of Education's English Programme framework (in place since 1995). Schools run it two ways: as a whole-school bilingual programme, or as an EP track inside a Thai school — one campus often runs 2–4 tracks (regular, bilingual, IEP) at different prices. The degree at the end is the Thai Matthayom 6 certificate, not an international diploma — which is exactly why these schools cost a fraction of international schools, and why the choice between the segments is a curriculum decision first and a price decision second.

Every figure comes from the school's own publications and carries its source label ([O] official / [A] aggregator / [NV] not verified). Source pages are archived with the Wayback Machine from each school page. Schools that we could verify only partly get an honest limited-data page — never a padded one. Bilingual fees are never pooled into the international rankings or fee tables.