St. Dominic's International School
International School in Lisbon
Quick answer
St. Dominic's International School (SDIS) Lisbon is part of the ISP Schools group, offering a complete IB World School continuum from age 3 to 18. The school enrols 636 students from 52 nationalities, accredited by IBO and CIS. Annual tuition runs $12,000-$24,000 USD (true cost ~$19,650, +9% — Lisbon's 91st cost percentile). Admissions are moderate; best suited to internationally mobile families committed to a full IB pathway in greater Lisbon.
Key facts
- Curriculum: IB taught at St. Dominic's International School.
- Tuition: $12,000–$24,000/yr published in EUR, US$ equivalent.
- Avg class size: 15 (max 18) Lisbon international school · 636 students total.
- 52 nationalities top: Portuguese is our largest single nationality, within a community that is over 70% international.
- Ages: 3-19 school day starts at 8h20.
- Accreditations: IBO, CIS verified.
636
52 (Portuguese is our largest single nationality, within a community that is over 70% international)
15 avg / 18 max
Fixed intake
IBO, CIS
About St. Dominic's International School
St Dominic’s International School is a welcoming, diverse IB continuum school (ages 3 to 18) where students feel safe, valued, and supported. With over 50 nationalities and a strong sense of belonging, SDIS fosters global mindedness, collaboration, and lifelong learning. Small class sizes, personalised attention, and an experienced faculty ensure an inclusive and academically rigorous environment
| Item | Amount |
|---|---|
| Annual tuition (USD) | $12,000 – $24,000 |
| Annual tuition (EUR) | 11778-23166 |
| Fee year | 2025-2026 |
| True annual cost (with hidden fees)how we calculate | $19,650(+9%) |
| First-year total (with registration + deposit) | $21,150 |
| Cost position in Lisbon | 91th percentile(premium tier) |
Hidden costs & fee notes
Only school in Portugal authorized for full IB continuum (PYP, MYP, DP). 5% discount for 2nd child, 15% for 3rd. Located in Cascais area.
IB
International Baccalaureate Middle Years Programme (IB MYP) Certificate International Baccalaureate Diploma Programme (IB DP) Certificate International Baccalaureate (IB) Bilingual Certificate
An average of 39.5 total points in the IB MYP Certificate An average of 31 total points in the IB DP Certificate
Portuguese, Spanish, French and Mandarin.
St. Dominic’s supports each student through an individualised approach, both in the classroom and in small‑group settings. The school has a multidisciplinary team made up of counsellors, educational psychologists, and English‑as‑an‑additional‑language teachers, and also works with external specialists when needed. The school's team supports students across all grade levels, cooperating closely with mainstream teachers and parents to achieve the best possible outcome for each student.
Yes
Yes
8h20 – 15h30
Yes
Yes
Recommended neighborhoods
Cascais, Carcavelos, Estoril, Oeiras
Is St. Dominic's International School right for your family?
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At a Glance
Fee Position in Lisbon
Mid-rangeSchool Profile
Class Size
Student Diversity
Very diverse
Common: Portuguese is our largest single nationality, within a community that is over 70% international
Estimated Real Cost
Tuition + registration, transport, uniform, exams
Only school in Portugal authorized for full IB continuum (PYP, MYP, DP). 5% discount for 2nd child, 15% for 3rd. Located in Cascais area.
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Nearby Schools (within 5km)
Disclaimer: School profiles are source-backed decision aids, not endorsements or official rankings. Tuition figures are approximate and may not include registration fees, uniforms, transport, or exam costs. Always verify directly with the school before applying. WhereNext is not affiliated with any school listed. This is not admissions consulting, legal advice, or official school placement guidance.