ISF Waterloo International School

In Brief

ISF Waterloo is a sound choice for families based along the Waterloo corridor who want a small British-curriculum school with strong pastoral care, IGCSE, and A-Levels at fees meaningfully below BSB or ISB. Families based in central Brussels or north of the city should check the commute carefully before enrolling.

ISF Waterloo occupies a specific niche: it is the British-curriculum alternative in the southern Brussels suburbs, at fees that sit comfortably below the premium international schools. Annual fees run from EUR 14,020 (Pre-School) to EUR 23,980 (A-Levels) at the personal tariff, which is roughly half of BSB's senior fees and a fraction of ISB's. The campus on Chaussee de Waterloo in Rhode-Saint-Genese sits on the Flanders-Wallonia border, around 15 minutes south of Brussels city centre and close to the Waterloo battlefield area - geography that works well for families in Waterloo, Rhode-Saint-Genese, and the southern suburbs.

The school is accredited by CIS, BSO, and COBIS - an unusual triple accreditation for a school of its size, and a meaningful signal of quality governance. Class sizes are small; every teacher is trained in English as an Additional Language, which matters for the families arriving mid-posting who need their children quickly integrated. The curriculum follows the British model through primary, into IGCSE for Years 10-11, and International A-Levels for the sixth form. A Chromebook is included in fees from Year 7, and day trips are included in the annual charge.

Reviews from families who have attended are consistently positive - small school, engaged leadership, responsive teachers. The limitation is that the school does not publish exam results (no IGCSE grade distributions or A-Level pass rates on the website), which makes it harder to benchmark against the IB schools in this list. The choice of A-Level subjects is narrower than at BSB. The campus is functional rather than impressive, and the school operates a personal tariff and a higher corporate tariff - if your employer is paying fees, confirm which tariff applies before budgeting.