Institut International de Lancy

In Brief

IIL makes most sense if you want curriculum flexibility - French Bac, IGCSE, or IB under one roof - or if you are committed to raising genuinely bilingual children from an early age. It is the strongest value option of the three for self-funding families.

IIL has been in Grand-Lancy for over 120 years and offers something genuinely unusual: parallel French and British bilingual tracks from nursery through to IB Diploma, plus a French Baccalaureate pathway. Families who arrive bilingual or who want their children to integrate into the Swiss French-speaking system often choose IIL over Ecolint precisely because the French track is first-class rather than secondary. The 90+ nationality mix gives it real diversity, and 1,500 students across the full 3-19 age range makes it a mid-sized school with a clear community feel rather than the institutional scale of Ecolint.

The 2025 results are publicly listed: IB Diploma pass rate of 97%, average score of 34.5 (above the global average of 30.6), with 16% of students scoring 40 or above. IGCSE results hit 99.8% pass rate, with 43% achieving A* or A average. A new building dedicated to secondary student wellbeing opened in 2025, improving a campus that parents have previously described as functional but compact. Class sizes are manageable, and teachers are accessible outside lessons - a consistent theme in parent feedback.

Grand-Lancy is on the left bank, which works well for families settled in Lancy, Carouge or Onex but adds commute time from the international district near the UN. British-track fees are somewhat higher than French-track fees, so check the correct column when comparing - the headline fee range reflects the British bilingual programme. The enrolment fee of CHF 1,000 plus CHF 2,000 advance payment are non-refundable, so be sure before signing.