Best Bilingual Schools in Bangkok

Comparison table

# Best Bilingual Schools in Bangkok

Bangkok · Curriculum

Bilingual is the loosest label in Bangkok schooling. The Thai Ministry of Education uses it for any private school running an "English Programme" (EP) above a threshold. Most parents using the word mean something narrower: a school where two languages carry real academic weight, children leave with genuine literacy in both, and the second language is not a daily lesson bolted onto an English-medium day.

The shortlist meeting the stricter bar splits into four pairings: Thai-English (anchored by ANS and the Satit bilingual stream), Mandarin-English (Concordian, SISB, TCIS, BMIS), French-English (LFIB), and German-English (RIS Swiss Section). Outside these, "bilingual" usually means an English-medium school with strong Thai classes, which is a different product.

What "bilingual" means here

Thai MOE "English Programme" (EP) schools sit inside the Thai national system and lift English-medium teaching to roughly 50 percent of subjects. Curriculum, exit exams (O-NET, GAT/PAT) and staffing remain Thai. Sarasas group, most Satit affiliates and Catholic schools like Assumption belong here. Bilingual in delivery, not in curriculum.

True dual-medium schools run two parallel curricula, or one curriculum delivered in two languages with literacy taught in both. ANS is the clearest example: a Thai school and a British school on one campus and one timetable. Concordian and SISB use a different model where Mandarin carries 30 to 50 percent of primary instruction and then tapers as IGCSE or IB Diploma takes over. LFIB and DsSB are foreign-national schools (French and German) where the second language is English, added through a formal section.

The fourth category, marketed bilingual, covers schools where the label is mostly admissions copy. The test: whether a child can read and write academic content in both languages by the end of primary.

The strong bilingual schools in Bangkok

Amnuay Silpa School (ANS), Phayathai. Thai and British curricula in parallel, Nursery to Year 13. Around *45 percent A-A at IGCSE and 96 percent A Level pass rate in recent reporting. CIS-accredited and the only Thai bilingual school with full FOBISIA membership**. Cohort heavily Thai with an international layer. Fees THB 476,000–627,000.

Concordian International School, Bangna (Samut Prakan). Full IB continuum PYP through DP, English-Mandarin immersion in Early Years and Primary that distinguishes it from any other IB school in the city. Thai integrated rather than offered as a separate stream. CIS and NEASC, around 1,000 students aged 2–18. Fees THB 626,000–963,000.

Singapore International School of Bangkok (SISB), multiple campuses including Pracha Uthit, Suvarnabhumi and Nonthaburi. Singapore primary model with bilingual English-Mandarin instruction, then Cambridge IGCSE and A Level. Independent of Singapore's Ministry of Education, so the claim rests on its own staffing. CIS-accredited, fees THB 402,000–789,000.

Lycée Français International de Bangkok (LFIB), Wang Thonglang. Part of the AEFE network of French schools, accredited by the French Ministry of Education. International British Section, launched in 2016 for primary and extended to secondary in 2020, exits through IGCSEs and the Baccalauréat français international (BFI), first cohort graduated June 2024. Fees THB 298,000–528,000, the most affordable of the foreign-national schools.

RIS Swiss Section / Deutschsprachige Schule Bangkok (DsSB), within RIS in Min Buri. Founded 1963, the only German- and Swiss-curriculum school in Thailand, ZfA-accredited. Bilingual German-English from age 2 to Grade 12, with Swiss government subsidies for eligible families. Sits inside the broader RIS campus. Fees THB 350,000–710,000 before subsidy.

Thai-Chinese International School (TCIS), Samut Prakarn. American curriculum (WASC-accredited) with Chinese language and culture woven through the day, predominantly Thai-Chinese cohort, under 700 students. Recent AP Chinese cohorts have produced perfect scores. Bilingual element heaviest in primary. Fees THB 370,000–490,000.

British Mandarin International School (BMIS), central Bangkok. The unusual combination of the full Chinese National Curriculum alongside English National Curriculum elements and IGCSE/A Level exits, recognised by the Chinese Embassy. Smaller and less established; staff stability appears to be an open question. Fees THB 380,000–751,000.

Satit Bilingual School of Rangsit University (SBS), Pathum Thani. Thai-English school attached to Rangsit University, around 900 pupils. IB PYP at primary, Cambridge IGCSE and A Level at secondary. Much lower fee point (THB 218,000–333,000), predominantly Thai cohort.

Kids' Academy International School (KAIS), Ekamai. Small trilingual primary running the English National Curriculum alongside Japanese and Chinese, ages 2–11. Fees THB 348,000–519,000. No secondary continuation, so families plan around a Year 6 or 7 transfer.

Where the trade-offs land

The price gap between Thai-bilingual and international-bilingual is large. SBS at THB 220,000–333,000 sits in a different market from Concordian at THB 626,000–963,000, even though both run IB programmes. The cheaper end signals smaller international cohorts, fewer foreign-trained staff, and exit routes weighted toward Thai universities. The premium end signals a globally portable transcript and a peer group that scatters across UK, US, Canadian and European universities.

Curriculum-stream depth matters more than the bilingual label. ANS is genuinely two schools in one, expensive to staff and demanding to scale; families committing get true dual-curriculum literacy. Concordian and SISB carry Mandarin heavily in early years and then taper, suiting families who want a strong Mandarin foundation but plan an English-medium secondary route. LFIB and DsSB are first and foremost French and German schools; the English section is real but secondary.

Geography filters the shortlist. Concordian and TCIS sit in Bangna and Samut Prakan. LFIB is in Wang Thonglang, off the BTS. SBS is in Pathum Thani, close to an hour from central Bangkok. ANS in Phayathai and SISB in Pracha Uthit are the most central. DsSB sits inside RIS in Min Buri.

How to read a bilingual claim

Curriculum split is the first question. What percentage of teaching minutes is delivered in each language by year group. A school that cannot answer in concrete numbers is using the label loosely.

Exit qualification is the test. A bilingual school whose exit is only IGCSE or only AP is bilingual in delivery but monolingual in outcome. Schools exiting through Thai O-NET, Chinese Gaokao, French Baccalauréat, German Abitur or a parallel pair are the ones where the second language has real currency at 18.

Teacher qualifications carry the claim. Both languages need teachers qualified to teach academic content in that language, not native speakers running conversation classes.

Accreditation is a filter, not a verdict. CIS, NEASC and IB authorisation confirm the international stream is real. ZfA confirms German-curriculum status, AEFE confirms French-curriculum status. TH_OBEC and TH_ONESQA confirm Thai Ministry registration only.

Cohort composition shapes the daily experience. A Thai-English school where 95 percent of pupils are Thai runs differently from one that is 50/50. Ask for the nationality breakdown by year group.

FAQs

Is an EP (English Programme) school bilingual? Bilingual in delivery: around half the subjects taught in English. Curriculum, exams and academic culture remain Thai. Useful for families committed to a Thai exit route who want stronger English than the standard Thai system delivers.

Which is the most genuinely dual-medium school in Bangkok? ANS on the Thai-English axis runs the clearest parallel-curriculum model. Concordian on the Mandarin-English axis runs the most committed immersion model in the early years. The two schools where the bilingual claim is structural rather than additive.

Can a child join without prior Thai or Mandarin? Yes at LFIB, DsSB, Concordian and SISB in early years, where language scaffolding is built in. Later entry into the second-language stream is harder; most schools cap second-language entry around Year 3 or Year 4 unless the child arrives with prior literacy.

Do bilingual schools weaken university outcomes? Not at the top end. ANS, Concordian, LFIB and DsSB place students at strong UK, US, Canadian and continental European universities. The risk sits in the middle of the market, where a school may run two streams thinly.

What about Korean, Japanese or Indian bilingual options? Korean International School of Bangkok in Bang Khen runs an almost entirely Korean curriculum with English and Thai added. Josuikan Bangkok closed in March 2024. The Japanese segment is concentrated in Thai-Japanese Association School and trilingual primary KAIS. Indian and Sikh community schools sit on a different track.