Oeiras International School

OIS

Founded 2010

Updated July 2026

5–19Ages
Co-edGender
DayType
460Students
6:1Student : teacher
Non-profitOwnership

Accreditations

Oeiras International School is a not-for-profit, parent-governed IB World School located in a green, rural environment near Lisbon. It offers the full International Baccalaureate continuum to students aged 6 to 18, focusing on academic excellence, student-centered inquiry, and sustainable development.

Term structure

Three terms

Teaching approach

The school’s motto, 'Sapere Aude' (dare to learn), reflects its commitment to bold, curious, and independent learning. It emphasizes global citizenship, digital responsibility, and sustainability, guided by the values of Service, Integrity, Respect, Growth, and Excellence (SIRGE). The school fosters a family-oriented, inclusive community where students are encouraged to take risks, build resilience, and work collaboratively.

Programmes

The school offers the full International Baccalaureate (IB) continuum: the Primary Years Programme (PYP) for ages 6–10, the Middle Years Programme (MYP) for ages 11–16, and the Diploma Programme (DP) for ages 17–18. The curriculum emphasizes inquiry-based learning, digital design, and the development of essential skills such as time management, project leadership, and collaboration.

Outcomes

Graduates of the school consistently achieve IB results above the global average and have received offers from prestigious universities including Cambridge, King’s College London, New York University, Stanford, and Delft University of Technology. The school supports students throughout their academic journey, from initial school years through to university placement.

Student support

EAL support
Unknown
Learning support
Unknown

Learning support

The school maintains small class sizes, with an average of 16 students, to ensure teachers can recognize and respond to individual learning needs. It is an inclusive institution that prioritizes personal growth and provides professional support to help all students maximize their potential.

Frequently asked questions(7)
What curriculum does Oeiras International School offer?
Oeiras International School offers IB PYP, IB MYP and IB Diploma.
How much is tuition at Oeiras International School?
Annual tuition at Oeiras International School is €14K–€22.4K. Fees vary by year group — confirm the current schedule with the school.
What ages does Oeiras International School teach?
Oeiras International School enrolls students aged 5 to 19.
Is Oeiras International School a day or boarding school?
Oeiras International School is a day school.
What accreditations does Oeiras International School hold?
Oeiras International School holds accreditations including IB, CIS and NEASC.
Is Oeiras International School co-educational?
Oeiras International School is a co-ed school.
Where is Oeiras International School located?
Oeiras International School is an international school in Lisbon, Portugal.

Tuition & fees

Annual tuition by grade

2026-2027
Annual tuition by grade
GradeAgesAnnual
Year 1, 2, 3, 4 (Pre-PYP and PYP 1, 2 & 3)5–8€14K
5 (PYP 4)9–9€14.6K
6 (PYP 5)10–10€17.4K
7, 8 & 9- (MYP 1, 2 & 3)11–13€18.6K
10 & 11 (MYP 4 & 5)14–15€22K
12 (DP 1)16–16€22.4K
13 (DP2) 2 Terms only17–17€22.4K
Other fees(6)
Other fees
Application fee· One time, mandatory fee for all students applying to OIS€250
Enrolment fee· Capital Levy: One (new) student. Two siblings starting in the same year: 7,500€; Three or more siblings: 8,500€. Current OIS families enrolling a new student benefit from a 10% discount. This is a non-refundable, one-time entry charge.€5K
Insurance· Annual insurance per Student€20
Mealsday· School meals are billed termly€6.3
Bus / transportterm· Two ways transportation per term. One way is 525€ per term.€840
Materials· Y11 Exams (IB-MYP assessment) and Y13 Exams (IB-DP assessment) are billed with Term II Fees€900

Discounts

  • Sibling discount: 5% for second child, 15% for third child, 25% for fourth child and so on
  • Full-payment discount: 2.5%

Admissions

The school accepts applications for students from age 6 to 18. The admissions process includes a mandatory application fee, and prospective families are encouraged to visit the campus or schedule a Zoom meeting to learn more about the school. Scholarships are available for outstanding students.

Calendar

The school operates on a term-based system with fees invoiced termly. The school day for MYP and DP students typically runs from 8:10 am to 3:40 pm, with co-curricular activities scheduled on Wednesday afternoons for older students and Thursday afternoons for PYP students.

Facilities

Swimming poolSports fieldGymnasiumPlaygroundLibraryScience labsArt roomMusic roomTheatre / auditorium

About the campus

The school operates across a green, rural campus featuring a restored 17th-century palace, a chapel, and modern learning spaces. Facilities include science labs, art and music rooms, computer labs, a library, a swimming pool, basketball and football courts, and a sports pavilion. The campus also features a mini-farm with animals, a kitchen garden, and woodland areas, with a new Horizon Campus for senior students scheduled to open in September 2026.

Co-curriculars

The school offers a wide range of co-curricular and after-school activities, including music, surfing, and sports. Students participate in the Duke of Edinburgh Award, the Eco-Schools Programme, and various residential visits and extended trips to locations such as Switzerland, Spain, the UK, France, and the Azores. Student life is further enriched by a Student Council and organized student houses.

  • Robert TomalinPrincipal

    Robert Tomalin is the Principal of Oeiras International School, where he oversees the school's academic and pastoral programs. He emphasizes the school's constructivist approach, commitment to sustainability, and the importance of a strong, supportive relationship between the school and the parent body.

  • Francisco VargasVice Principal and Head of Curriculum

    Francisco Vargas serves as the Vice Principal and Head of Curriculum, playing a key role in the Educational Leadership Team that oversees the school's academic program and pastoral care.

  • Barbara Castro GuimarãesHead of the IB DP

    Barbara Castro Guimarães is the Head of the IB DP, responsible for leading the Diploma Programme at the school.

  • Gemma MontefioreHead of the IB MYP

    Gemma Montefiore is the Head of the IB MYP, responsible for leading the Middle Years Programme.

  • Jonathan ChambersHead of the IB PYP

    Jonathan Chambers is the Head of the IB PYP and a PYP ICT Teacher. He is an experienced educator and IB Programme and Workshop Leader with a background in school management and leadership from Harvard Business School.

  • Jorge SantosHead of Department for Arts

    Jorge Santos is the Head of the Arts Department and a Visual Arts and Design Teacher. He has been with the school since 2013 and previously worked at St. Dominic’s International School.

  • Neale DavisHead of Department for Individuals and Societies

    Neale Davis serves as the Head of Department for Individuals and Societies.