Best Private & Public International Schools Portugal 2026
An independent comparison of the top international schools near Lisbon. We review IB, British, and American curricula — with real acceptance rates, all-in fee breakdowns, and editorial verdicts based on first-hand school visits. No paid placements. No sponsored rankings.
Key takeaways
- ✓There are 78 top internationally accredited schools within 45 minutes of Lisbon — covering IB, British (IGCSE), and American curricula.
- ✓Annual fees range from €12,000 (United Lisbon) to €32,000 (TASIS Portugal). All-in costs including transport and extras are 15–30% higher than headline tuition.
- ✓Acceptance rates vary widely: 8% (St. Julian's School) to 45% (United Lisbon International School). Apply to 2–3 schools simultaneously.
- ✓All four schools offer the IB Diploma Programme — the most portable qualification for internationally mobile families.
- ✓St. Julian's School (Carcavelos): best overall, British/IB curriculum, top IB results, 8% acceptance rate — apply 12–18 months ahead.
- ✓United Lisbon International School: best value, American/IB, most accessible, walking distance from Parque das Nações.
- ✓For September entry, schools open applications October–December the preceding year. Shadow days (where your child attends classes) are recommended before committing.
1. Overview: Portugal's international school market
Within a 45-minute radius of Lisbon, four internationally accredited schools cover the three major curricula sought by relocating families: British (IGCSE + IB Diploma), American (US graduation pathway + IB Diploma), and pure IB. This concentration is exceptional by European standards — comparable regions in Spain, France, or Germany rarely offer this level of choice within a single commuter zone.
The market is not uniform. Acceptance rates range from 8% (St. Julian's School) to 45% (United Lisbon International School). Annual fees span €12,000 to €32,000. The right school for your family depends on curriculum alignment with your long-term plan, genuine lifestyle fit, and a realistic assessment of your application strength.
This guide walks through each of those dimensions before presenting the school profiles. If you want a direct match based on your specific situation, use our 60-second School Finder quiz.
2. Curriculum guide: which track is right for your children
The curriculum decision is the most consequential choice you will make — and the one most families underestimate. It affects university admissions, exam schedules, and how smoothly your children transition if you move again.
Offered by:: St. Julian's School
The British track (IGCSEs at 14–16, then A-Levels or IB at 16–18) is the smoothest path for families who may return to the UK or apply to British universities. IGCSE results are internationally recognised, but A-Levels remain the gold standard for UK admissions. St. Julian's offers both pathways. If UK university admission is the primary goal, the A-Level route outperforms IB at the most selective institutions.
Offered by:: TASIS Portugal · CAISL · United Lisbon
The American track leads to a High School Diploma recognised by US colleges, supplemented by the IB Diploma or AP courses for competitive university applications. CAISL holds US State Department affiliation — a meaningful credential for American families. For families targeting US, Canadian, or Dutch universities, this path is the clearest.
Offered by:: All four schools
All four schools on this list offer the IB Diploma Programme at 16–18. The IB is the most portable qualification available — accepted by universities across the UK, USA, Europe, Australia, and Asia without conversion. For families uncertain about their next destination, the IB provides the best hedge. Average global pass rates are around 78%, with top scores requiring genuine academic commitment.
Raising Kids in Portugal note:: If you're genuinely undecided between British and American tracks, choose a school with a strong IB Diploma programme — all four schools on this list qualify. The IB eliminates the conversion problem if your family moves again.
IB data source: International Baccalaureate — Diploma Programme (IBO.org)
3. The real cost of international school fees
Headline annual tuition is only part of the picture. Based on data from 200+ families, the all-in annual cost of attending an international school in Portugal is typically 15–30% higher than the advertised tuition. Here is what the brochures don't highlight.
| School | Tuition (annual) | Registration fee | All-in estimate |
|---|---|---|---|
| St. Julian's School | €16,000–26,000 | €2,000–2,500 | ~€20,000–23,000 |
| TASIS Portugal | €18,000–32,000 | €2,500–3,000 | ~€23,000–30,000 |
| CAISL | €14,000–24,000 | €500–1,000 | ~€17,000–22,000 |
| United Lisbon | €12,000–22,000 | €1,000–1,500 | ~€14,000–19,000 |
What the all-in estimate includes:: tuition, registration fee (one-time), school transport (if you live more than 5 km from campus), lunch programme, and a standard set of extra-curricular activities. It excludes uniforms (€300–600) and premium activities.
Best value:: United Lisbon International School — families in Parque das Nações pay no transport costs and benefit from the lowest tuition range on this list. Most expensive:: TASIS Portugal — but also the only school here with genuinely boutique class sizes (under 15 per class at most year levels).
4. The admissions reality
The surge in expat families since 2020 has not been matched by a proportional increase in school capacity. Apply early, apply to multiple schools, and understand the timeline. For September entry, most schools open applications October–December of the preceding year.
St. Julian's School
Apply immediately regardless of timeline. The waitlist is long and unpredictable.
TASIS Portugal
Apply 12 months before intended start. Shadow days conducted for shortlisted applicants.
CAISL
More accessible but still competitive at popular year levels. Best value for American families.
United Lisbon
The most accessible on this list — but growing fast. Apply early for 2026 intake.
Raising Kids in Portugal's admissions rule
Apply to a minimum of 2–3 schools simultaneously. Request a shadow day at each shortlisted school — where your child attends classes for a full morning — before signing any enrolment contract. Most schools offer this if asked directly at enquiry stage, even if it isn't advertised.
5. How Raising Kids in Portugal assessed these schools
Every school on this list has been visited in person by a Raising Kids in Portugal consultant at least 3 times between 2023 and 2025. Our assessment combines structured school visits, interviews with current families, and verification of published data against primary sources.
On-site visits
Minimum 3 visits per school, including during term time.
Family interviews
Structured interviews with current and recent families — not admissions staff.
Data verification
Fees, acceptance rates, and IB results verified against primary sources.
Schools pay nothing to appear on this list and cannot pay to alter their position, verdict, or any published data. Raising Kids in Portugal's editorial process is fully independent.
6. School profiles
Editorial Top Picks
Raising Kids in Portugal VerifiedSt. Julian's School
Carcavelos, Cascais
Historic British international school with extensive grounds near the Cascais coastline. Known for academic rigour, a very competitive entry process, and one of the strongest IB results in Portugal.
The gold standard for British families — if you can get a place, take it.
"The community here is incredible. Our kids made lifelong friends within weeks." — British parent, relocated 2023
TASIS Portugal
Sintra
The newest luxury campus in Portugal, set in the forested hills of Sintra. TASIS offers exceptional arts and STEM facilities under the American curriculum plus IB Diploma — and the smallest class sizes of any school on this list.
Premium choice for creative families who want a US-track education in a stunning European setting.
"The teachers actually know each child by name — the small size is a huge differentiator." — American parent, relocated 2024
Carlucci American International School (CAISL)
Sintra / Linho
The only US State Department-supported school in Portugal. CAISL combines an inclusive admissions policy with solid IB results and a close-knit community feel — making it the best value for American families.
Best value for American families — official US State Dept backing with a real community atmosphere.
"We looked at four schools. CAISL felt like home from day one — the parents' network is extraordinary." — German-American family, relocated 2023
United Lisbon International School
Lisbon (Parque das Nações)
A modern vertical campus in the heart of Lisbon's most contemporary district. United Lisbon places technology, entrepreneurship, and future skills at the centre of every program — ideal for families who want city living without compromising on quality.
The urban choice for tech-forward families — most accessible fees on this list with real Lisbon energy.
"Living and schooling in Parque das Nações is seamless. We walk to school past the river every morning." — Dutch parent, relocated 2024
Full School Directory
78 schools across Portugal - filter by region, curriculum or budget
78 schools
Carlucci American International School (CAISL)
United Lisbon International School
Colégio Luso-Internacional do Porto
Colégio Luso-Internacional do Porto stands out as a key educational choice following the Private international school curriculum. With a rich program including art, debate, music, it offers a well-rounded environment for expat children to thrive.
Aljezur International School
Aljezur International School stands out as a key educational choice following the British curriculum. With a rich program including art, it offers a well-rounded environment for expat children to thrive.
Aspire International School
Aspire International School stands out as a key educational choice following the British curriculum. With a rich program including art, dance, it offers a well-rounded environment for expat children to thrive.
Barlavento International Primary School
Barlavento International Primary School stands out as a key educational choice following the British curriculum. With a rich program including art, drama, it offers a well-rounded environment for expat children to thrive.
Brave Generation Academy, Algarve
Brave Generation Academy, Algarve stands out as a key educational choice following the British, American, Portuguese curriculum. With a rich program including art, dance, it offers a well-rounded environment for expat children to thrive.
Bright International School
Bright International School stands out as a key educational choice following the British curriculum. With a rich program including art, music, it offers a well-rounded environment for expat children to thrive.
Colégio Bernardette Romeira
Colégio Bernardette Romeira stands out as a key educational choice following the British, Portuguese curriculum. With a rich program including art, basketball, swimming, it offers a well-rounded environment for expat children to thrive.
Colégio Santiago Internacional
Colégio Santiago Internacional stands out as a key educational choice following the British curriculum. With a rich program including art, music, it offers a well-rounded environment for expat children to thrive.
Frequently Asked Questions
What is the best international school in Portugal?
St. Julian's School in Carcavelos, Cascais — with a 8% acceptance rate and top IB results — is broadly considered the best. For American curriculum families, CAISL offers the best value with US State Department backing.
How much do international schools cost in Portugal?
Annual fees range from €12,000 (United Lisbon) to €32,000 (TASIS Portugal). Most families budget €15,000–25,000 per child all-in. Many schools also charge a one-time registration fee of €500–3,000.
Which area is best for families near international schools?
Cascais and Estoril for St. Julian's School (coast lifestyle). Sintra for TASIS and CAISL (nature, hills). Parque das Nações for United Lisbon International School (city living).
Do I need to visit schools in person before applying?
Yes — always. The difference between a school's marketing and its actual atmosphere can be significant. Request a shadow day for your child at each shortlisted school before committing to an enrolment contract.
Find the right neighborhood to match
School choice drives neighborhood choice. Here are the natural pairings.
Cascais & Estoril
Coastal living 15–20 min from St. Julian's School. Atlantic beaches, large expat community.
Sintra & Surroundings
Nature and history near TASIS Portugal and CAISL. 10–15 min to both campuses by car.
Parque das Nações
Modern riverfront living. Walking distance to United Lisbon International School.