American School of Madrid and Colegio Base are both in Madrid, about 16 km apart. Both schools offer American programmes, and Colegio Base also offers Bespoke and British. Published annual fees are €11,593 - 23,878 at American School of Madrid and €6,813 - 14,312 at Colegio Base, which puts American School of Madrid roughly 68% higher. American School of Madrid takes pupils from 3 to 18, and Colegio Base from 1 to 18. American School of Madrid is the larger school, with around 1,045 pupils to Colegio Base's 685. Typical class sizes are 25 at American School of Madrid and 19 at Colegio Base.
American Curriculum, Bespoke Curriculum, British Curriculum
Pupils
Pupils
1,045
Pupils
685
Typical class size
Typical class size
25
Typical class size
19
Instruction language
Instruction language
English
Instruction language
Spanish, English
Opened
Opened
1961
Opened
1962
Bus service
Bus service
Yes
Bus service
Yes
Essentials
Essentials
Location
Location
Pozuelo de Alarcón, Madrid, Spain. The campus is located at Calle América 3, Pozuelo de Alarcón 28224, Madrid. Pozuelo is part of the Madrid metropolitan area.
Location
The Base International School is located on a multi-building campus in La Moraleja, Alcobendas, Madrid, Spain. The campus sits in La Moraleja, one of the greenest and most peaceful areas of Alcobendas, far from the noise and congestion of the city. The street address is C. del Camino Ancho, 10, 28109 Alcobendas, Madrid.
Stages
Stages
Lower School (ages 3-11), Middle School (Grades 6-8, ages 11-14), Upper School (Grades 9-12, ages 14-18). The Upper School includes the IB Diploma Programme.
Stages
Preschool (1–6 years old); Primary (6–12 years old); Secondary (12–16 years old); National Baccalaureate (16–18 years old); International Baccalaureate (16–18 years old).
School type
School type
not-for-profit private international day school with an American curriculum
School type
Private, international school. Base International School is part of Affinitas Education, a network of bilingual and international schools.
Pupil nationality mix
Pupil nationality mix
One third American, one third Spanish, and one third of students from around 60 other countries.
Pupil nationality mix
30 nationalities represented in the school.
Additional learning support
Additional learning support
The Learning Support team provides services across the K-12 spectrum, including English Language Acquisition, Reading, Writing, Math, and Executive Function. Documentation is required during admissions to determine whether ASM can support a child's learning and well-being; some students requiring substantial academic or social-emotional support may not be accepted into Grades 6-12.
Additional learning support
A Guidance and psychopedagogy department supports learning and personal development, offering speech therapy, academic and career guidance, and emotional support from Preschool through Bachillerato. The school focuses on prevention, assessment, and addressing any learning or developmental needs.
Country affiliation
Country affiliation
United States
Country affiliation
Spain
Religious affiliation
Religious affiliation
—
Religious affiliation
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School day structure
School day structure
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School day structure
Extended hours are available in the morning and afternoon: 7:30–9:30 and 17:00–18:30, depending on the stage.
Bus service details
Bus service details
ASM offers a private bus service provided by Grupo Chapin with 13 routes across Central Madrid, Pozuelo, Aravaca, Majadahonda. It is not door-to-door; bus stops are designated for safeguarding; the ASM Business Office coordinates routes and a bus-tracking app is available; bus monitors are on every bus; contact bus@asmadrid.es for routes and payments.
Bus service details
School transport across Madrid operates on 19 bus routes reaching areas such as Chamartín, Chamberí, Salamanca, Arturo Soria, Sanchinarro, Tres Cantos, and Pozuelo. SMS notifications are sent in case of incidents, and students are accompanied safely from their front door to the classroom.
Fees
Fees
Fee details
Fee details
Application fees
- Preliminary application fee: EUR 250.00 (one-time, non-refundable). - Registration fee (paid upon admittance): EUR 2,000.00 (non-refundable; credited toward tuition). - Matriculation (re-enrollment) fee (payable in spring to reserve a place for the following year): EUR 950.00 (non-refundable).
Tuition fees — Private (family pays; Academic year 2025–2026)
- Early years / K1–K2: Semester EUR 5,796.50 (payable September and February); Annual EUR 11,593.00. - K3: Semester EUR 6,025.00 (payable September and February); Annual EUR 12,050.00. - Grade 1–2: Semester EUR 8,133.50 (payable September and February); Annual EUR 16,267.00. - Grade 3–5: Semester EUR 9,131.50 (payable September and February); Annual EUR 18,263.00. - Grade 6–8: Semester EUR 11,069.00 (payable September and February); Annual EUR 22,138.00. - Grade 9–12: Semester EUR 11,939.00 (payable September and February); Annual EUR 23,878.00.
Tuition fees — Corporate (employer pays; Academic year 2025–2026)
- Capital fee (one-time, non-refundable): Private enrolment (Grades K3–12) EUR 6,000.00 per student; Corporate enrolment EUR 8,100.00 per student. - Family plan: 10% reduction on tuition and capital fee for the third child from the same family; 20% reduction for each additional child thereafter (applies to both tuition and one-time capital fee).
Billing schedule and payment terms
- Payment frequency options: annual payment, semester payment, or monthly installments. - Administrative service charge: a 4% per semester administrative service charge is added if tuition is paid by monthly installments. - Semester billing dates: semester payments are payable in September and February (semester amounts shown above are payable on those dates). - Proration: charges are prorated for families joining during the school year. - Currency: payments are accepted in Euros (EUR) or in U.S. Dollars (USD) using the prevailing exchange rate.
Optional fees and other costs
- Cafeteria: daily cost EUR 9.35; billed at the end of each month for actual meals/snacks consumed. - Bus service with monitors: Per semester EUR 1,162.00; Annual EUR 2,324.00. - Spirit wear / school clothing: optional spirit wear is available for purchase through the school's spirit wear provider; purchases are optional and charged separately. - Additional optional charges: certain after-school activities, trips, or specific programs may carry extra fees; such additional charges are invoiced as applicable.
Refund information and withdrawal policy
- Each semester is treated as 150 calendar days for refund calculation. Refund of tuition when a student withdraws after classes begin is determined by days enrolled within that semester as follows: 1–5 days enrolled: 78% refund; 6–20 days: 70% refund; 21–35 days: 55% refund; 36–50 days: 38% refund; 51–65 days: 22% refund; 66–80 days: 10% refund; 80 days and over: 0% refund. - Additional fees are not covered by this tuition refund schedule and are not refundable. - Bus service: a full refund is made on the unused portion of the bus service charge based on the number of calendar days remaining in the semester after withdrawal.
Boarding fees
- Boarding fees: Not applicable. The American School of Madrid is a non-profit K–12 co-educational day school and does not operate a boarding program.
Fee payment options (channels and practical notes)
- Payment channels such as specific acceptance of credit card, online payment portal, or bank transfer are not itemized in this fee summary; payments may be made in EUR or USD and may be scheduled annually, by semester, or monthly (monthly payments incur the administrative service charge noted above). For billing and method details, families should follow the school's invoicing instructions when completing registration and enrollment.
Fee details
Application & reservation fees
- Initial enrolment (one‑time, paid at first registration; non‑refundable and not deductible): - EUR 600 (Infant) - EUR 720 (Primary) - EUR 730 (Secondary) - EUR 730 (Bachillerato). - Reservation of place for returning families (one‑time; invoiced in mid‑May; not refundable): EUR 630.
Tuition fees (monthly; escolaridad — billed per month)
Notes: the published monthly amounts are divided into ten monthly payments (September to June) for most year groups; 2º Bachillerato (Spanish and IB) is billed over nine monthly payments (September to May). All amounts below are shown as monthly fees.
- Infant (full day): EUR 630 per month. - Infant (morning schedule only): EUR 490 per month (available only for children in the first cycle of Infant—ages 1–2). - Primary: - Years 1–2 Primary: EUR 800 per month. - Years 3–4 Primary: EUR 820 per month. - Years 5–6 Primary: EUR 830 per month. - Secondary (ESO): - Years 1–2 ESO: EUR 890 per month. - Years 3–4 ESO: EUR 910 per month. - Bachillerato (National route): - 1º Bachillerato Nacional: EUR 1,030 per month. - 2º Bachillerato Nacional: EUR 1,145 per month (billed over nine months: September to May). - International Baccalaureate (IB Diploma Programme): - 1º IB (Programme Year 1): EUR 1,300 per month. - 2º IB (Programme Year 2): EUR 1,445 per month (billed over nine months: September to May).
Billing schedule and payment terms
- Annual tuition is normally divided into ten equal monthly instalments (September through June) for each billed concept. 2º Bachillerato (both Spanish and IB) is divided into nine monthly instalments (September through May). - Reservation of place for the next academic year is invoiced in mid‑May; the reservation amount is returned in September to families who continue at the school; families who do not notify non‑renewal by the stated deadline may forfeit the reservation/refund or be charged the September instalment as set out in the school's enrolment terms. - The initial enrolment fee (matrícula) is paid once at first registration and is non‑refundable and not deductible from future fees.
Boarding fees
- Boarding is not offered / no boarding fees are listed in the school's published fee schedule.
Other services and additional fees
- School meals and catering: - Half‑board (meal plus snack): EUR 245 per month. - Single day meal: EUR 20 per occasion. - Bachillerato (meal and snack — 2 days per week): EUR 125 per month. - Snack / bocadillo: EUR 45 per month. - Extended hours (7:30–9:00 and 17:00–18:30): provided free of charge for Infant and for the rest of the stages (as published). - School transport (bus): - Regular transport (1 route): EUR 150 per month. - Transport (2 routes): EUR 235 per month. - Bachillerato transport: EUR 100 per month (1 route) / EUR 150 per month (2 routes). - Special‑zone transport: EUR 110 per month (1 route) / EUR 150 per month (2 routes). - Other one‑off or annual costs: - Psychological report (when required by the school's protocols): EUR 100. - Annual medical check / recognition: EUR 68. - Annual school accident insurance and healthcare service: EUR 107 (per annum, all courses). - Graduation photograph (class photo/orla): EUR 25. - Yearbook: EUR 50. - Sibling registration fees / concessions: - Matriculation for the second sibling: EUR 400 (second‑child registration fee). - Matriculation for the third and subsequent siblings: published as exempt / free from the matriculation fee (as indicated in the school's fee schedule).
Refund information
- The initial enrolment fee (matrícula) is explicitly non‑refundable and not deductible. - The reservation fee charged in mid‑May for returning families is non‑refundable if the family does not notify non‑renewal within the published deadline; for families who continue, the reservation amount is refunded in September (per the published enrolment terms and deadlines).
Fee payment options
- The school's published fee schedule and prices document lists fees, billing periods and non‑refund rules but does not specify public details of accepted payment methods (for example: bank transfer, direct debit, or card payment) within the fee schedule itself. For payment method arrangements and to confirm available payment channels, contact the school's admissions or finance office directly.
Diving deeper
Diving deeper
Boarding arrangements
Boarding arrangements
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Boarding arrangements
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Uniform requirement
Uniform requirement
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Uniform requirement
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Food options
Food options
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Food options
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House system
House system
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House system
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Governance and ownership
Governance and ownership
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Governance and ownership
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Academics
Academics
Curriculum details
Curriculum details
The school is a K-12 independent school with an American curriculum. It offers the US High School Diploma, the International Baccalaureate Diploma, and the Titulo de Bachillerato. The Upper School follows the International Baccalaureate Diploma Programme (IB DP).
Curriculum details
Base International School offers Preschool, Primary, Secondary (ESO), and High School through either the Spanish Bachillerato or the International Baccalaureate Diploma Programme. The school provides an international curriculum that fosters critical thinking and global awareness, with a student-centered approach and small class sizes. From Year 10 (4º ESO), Base implements an Academic and Career Guidance Plan to help students identify interests, choose the most suitable Bachillerato, and plan university pathways. The campus in La Moraleja, Alcobendas hosts dedicated facilities for each stage, including sports, theatre, art, and an on-site dining hall. Extracurricular activities include robotics and programming in English. Base is part of Affinitas Education, an international network of bilingual and international schools.
Student teacher ratio
Student teacher ratio
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Student teacher ratio
Small class sizes.
Exam results
Exam results
IB results May 2025: average total points 34.5; World average 30.6; Diploma pass rates: World Diploma pass rate 83.30%, ASM Diploma pass rate 96.8%; Diplomas Awarded 93.30%.
Exam results
100% pass rate in EvAU (university entrance exams) 2024. EvAU average score is 8.25. 30 nationalities represented in the school. Highest EvAU score achieved is 13.475 (out of 14).
Higher education progression
Higher education progression
Between 2021 and 2025, 56% of seniors were admitted to Top 100 Universities in the world (QS World University Rankings). The Class of 2025 had 67 acceptances to Top 100 Universities worldwide and 123 acceptances to Top 100 U.S. Universities.
Higher education progression
Base students are admitted to leading universities worldwide. Common fields of study include Engineering, Sciences, Economics, International Relations, Law, and creative disciplines.
Gifted and talented
Gifted and talented
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Gifted and talented
Base provides personalised support to help each student develop their talents. A Guidance and Psychopedagogy Department supports learning and personal development from Preschool through Bachillerato, including academic and career guidance. Extracurriculars span athletics, arts, and technology to foster student talents.
Academic calendar
Academic calendar
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Academic calendar
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Wellbeing & support
Wellbeing & support
Social & emotional learning
Social & emotional learning
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Social & emotional learning
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Special educational needs (SEN)
Special educational needs (SEN)
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Special educational needs (SEN)
—
English as an additional language
English as an additional language
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English as an additional language
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Mental wellbeing
Mental wellbeing
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Mental wellbeing
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Safeguarding
Safeguarding
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Safeguarding
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Safeguarding policy
Safeguarding policy
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Safeguarding policy
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Facilities
Facilities
Facilities overview
Facilities overview
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Facilities overview
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Sports facilities
Sports facilities
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Sports facilities
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Academic facilities
Academic facilities
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Academic facilities
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Extra curricular facilities
Extra curricular facilities
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Extra curricular facilities
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Parent experience
Parent experience
History
History
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History
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Community
Community
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Community
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Parent teacher association
Parent teacher association
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Parent teacher association
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Extra-curricular
Extra-curricular
Academic & intellectual
Academic & intellectual
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Academic & intellectual
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Arts & creative
Arts & creative
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Arts & creative
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Cultural & language
Cultural & language
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Cultural & language
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Social & hobbies
Social & hobbies
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Social & hobbies
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Community & service
Community & service
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Community & service
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Leadership & professional
Leadership & professional
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Leadership & professional
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Lifestyle & wellbeing
Lifestyle & wellbeing
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Lifestyle & wellbeing
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Language provision
Language provision
Language provision
Language provision
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Language provision
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Bilingual teaching
Bilingual teaching
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Bilingual teaching
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Immersion programs
Immersion programs
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Immersion programs
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Reputation
Reputation
Awards
Awards
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Awards
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Accreditations
Accreditations
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Accreditations
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Admissions
Admissions
Admissions
Admissions
The school welcomes applications from students of all nationalities and cultures. The Admissions Committee prioritizes US citizens; expatriate families; alumni or siblings of current students; and families seeking a college-preparatory program based on American standards and practices culminating in an American and/or International Baccalaureate diploma. Parents with children who have special needs should submit all pertinent documentation for the Admissions Commission to determine whether support can be provided. Applicants cannot be accepted as fully enrolled until their transcripts and other requested documentation have been received by the Admissions Office. ASM admits students of any race, color, ethnicity, national origin, religion, gender, sexual orientation, or disability; it does not discriminate in admission policies, financial aid and scholarship programs, and other school-administered programs. ASM reserves the right to accept or reject any application. Families should complete the Application Form as the first step.
Admissions
1. Complete the contact form to start the admissions process. It lets Base get to know you and send personalised information tailored to your family. You will receive essential communications about the program and admissions timelines. This initial step sets the stage for a personalised follow-up.
2. Interview with admissions team. An interview with the admissions team follows. The interview provides an opportunity to discuss your child's needs, understand Base's educational approach, and view the campus. A tour of the school is included to help you experience the environment firsthand, and feedback about fit and next steps is provided after the meeting.
3. Submit the required documents. This formalises your interest and helps secure a place for your child with the support of our team. The admissions staff guide you through the documents needed and ensure everything is in order for review. Once documents are received and reviewed, you will be advised on the next steps.
4. Welcome to Base International School! A Family Coordinator guides you through onboarding and supports you throughout the school year. The onboarding includes introductions and scheduling and ongoing assistance to help your family settle into school life and engage with the community.
Scholarships
Scholarships
The ASM Scholarship Program exists thanks to generous donations to the Scholarship Fund and the annual Gala. Thanks to donors, ASM can offer the ASM learning experience to talented students who would not otherwise be able to join ASM, and applicants are asked to demonstrate a high level of English and a commitment to contribute positively to the ASM community. The Scholarship Fund is for exceptional Upper School students, starting with two beneficiaries in Grade 9 (3º ESO/ British Year 10). It will cover up to 75% of school tuition and fees. Applications are now open for the 2026/2027 school year and close on Monday, February 23, 2026. Two applications are needed: a student application and a financial application. Two scholarships will be awarded to two students entering Grade 9 in September 2026; when the program is fully established, there will be up to 8 Upper School students (2 in each grade) receiving scholarships. Eligibility requirements include a strong academic record; near-native English (B2 Cambridge); a proven desire to be part of the ASM community; and values aligned with ASM. The scholarship lasts from Grade 9 through Grade 12 on a year-by-year basis and is funded by donations (scholarships are not paid from tuition). The scholarship covers up to 75% of tuition and fees (excluding additional costs such as trips). For families who are part of the ASM community and need help, ASM provides support for short-term financial hardship. Contact: scholarships@asmadrid.es; Duration: Grade 9–12 (year by year).
