British International School of Zagreb

What British International School of Zagreb does

British International School of Zagreb (BISZ) is a privately-held, family-owned international school operating in Zagreb, Croatia since September 2013. It delivers British-style education from Kindergarten through A-Level (Years 1–13), following the UK National Curriculum alongside the International Primary Curriculum (IPC) for primary students and Cambridge Assessment International Education (CAIE) qualifications — Cambridge IGCSE, AS, and A-Level — for secondary students. BISZ holds the distinction of being the first Cambridge International School in Croatia and operates the country's first private boarding school, with a 25,000 m² self-contained campus featuring 52 deluxe boarding rooms, science labs, sports facilities, and 82 security cameras under 24-hour surveillance.

The school's revenue model is built on annual tuition fees ranging from €7,500 (Kindergarten) to €18,000 (High School), with boarding priced at €29,900–€32,500 per year and a one-time €1,500 enrollment fee. The institution serves expatriate, diplomatic, and corporate families relocating to Croatia, alongside affluent local Croatian families seeking international qualifications. Enrollment is relationship-driven, with personal campus tours and direct contracts; the school claims 1,500+ alumni across 50+ nationalities and a 100% placement rate at students' first-choice universities including Harvard, Cambridge, LSE, and Bocconi.

BISZ is part of a broader Časl family educational ecosystem that includes Kreativan razvoj Primary School (founded 1995), Privatna gimnazija Dr. Časl (2003), and the STK Dr. Časl Table Tennis Club. Leadership rests with founder and Principal Dr. Martin-Tino Časl (Ph.D. in Chemistry, long-tenured sports and academic career), Director Tino Sven Časl (MBA), and Head of Boarding Tea Pavliško. The school has no external investors, no public listing, and no disclosed AI/technology platform — its competitive positioning rests on accreditation prestige, small class sizes (max 15, 1:6 teacher-student ratio), and UK publication features (Commonwealth at 70/75, Innovation 800, King Charles III biography).

Name

British International School of Zagreb

Legal name

British International School of Zagreb

Website

https://britishschool.hr

Company type

Private

Founded year

2013

Operating status

Operating

Headcount range

11–50 employees

Ownership category

akta.pro rank

Product category

International K-12 Education

NAICS

Elementary and Secondary Schools (6111), Elementary and Secondary Schools (611110)

SIC

Services-Educational Services (8200)

akta.pro primary industry

International/Global Curriculum Schools (IB, Cambridge, etc.) (EDAJABAG)

akta.pro secondary industries

Nonsectarian Independent Boarding Schools (EDAJABAB), Nonsectarian Independent Day Schools (EDAJABAA)

Keywords

• International school education
• British curriculum programs
• Cambridge IGCSE A-Level
• Private boarding school
• Primary secondary education

Headquarters

HQ city

Zagreb

HQ country

Croatia

HQ region

Europe

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Marketing or Sales, Others

Revenue model

1. Tuition Fees: Annual tuition fees charged per student based on program level (Kindergarten, Primary, Secondary). Fees vary by year group and program type (KG, Lower Primary, Upper Primary, High School).
2. Boarding Program: Full-year boarding program providing accommodation, meals, pastoral care, and supervision for students. Charged as an annual fee in addition to tuition.
3. Enrollment Fee: One-time enrollment fee of 1,500 EUR charged upon admission, covering administrative costs associated with onboarding new students.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels7 records

Core offering

The British International School of Zagreb (BISZ) is a private international school that delivers British-style education from Kindergarten through High School (Years 1–13), following the English National Curriculum alongside the International Primary Curriculum (IPC) and Cambridge International Education programmes (IGCSE and AS/A-Level). The school operates on a closed 25,000 m² campus in Zagreb and also runs the first private boarding school in Croatia, with 52 deluxe rooms, full pastoral care, and supervised study. Tuition is charged annually per program level, with an additional one-time enrollment fee.

Product overview

The British International School of Zagreb (BISZ) is a private international school offering a comprehensive British education from Kindergarten (EYFS) through High School (Years 1-13). The school follows the UK National Curriculum alongside Cambridge International Education programmes (IGCSE and AS/A-Level) and the International Primary Curriculum (IPC) for primary students. BISZ operates a modern campus with state-of-the-art facilities including a science lab, swimming pool, sports halls, and a 52-room boarding house. The institution is part of a 30-year educational legacy rooted in the Kreativan razvoj Primary School, founded in 1995.

Differentiator

Problem solved

Functional benefit

Products and services

• Kindergarten (Early Years Foundation Stage) Programme Early childhood education following the English Early Years Foundation Stage framework with Jolly Phonics, hands-on maths through games, IPC curriculum elements, Art, Music, ICT, and daily PE lessons for children from early years. Tuition is 7,500 EUR per year.
• Primary School (Years 1-6) Primary education covering Key Stages 1–2 (Years 1–6) following the English National Curriculum alongside the International Primary Curriculum (IPC), with core subjects Literacy, Numeracy, Science, ICT, and elective foreign languages. Tuition is 14,500 EUR per year.
• Upper Primary / Lower Secondary (Years 7-9) Upper Primary education (Years 7–9) bridging into Cambridge Secondary, with small classes of up to 15 students and a 1:6 teacher-to-student ratio. Tuition is 16,000 EUR per year.
• High School — Cambridge IGCSE and AS/A-Level Programme (Years 10-13) Secondary education comprising Key Stages 4–5 (Years 10–13), offering Cambridge IGCSE qualifications in Years 10–11 (English, Mathematics, Science, ICT, The Arts, Humanities, Modern Foreign Languages) and GCE AS & A-Level qualifications in Years 12–13 (3–4 AS subjects, 3 A-Level subjects), preparing students for university admission worldwide. Tuition is 18,000 EUR per year (or 14,000 EUR for Y10–Y11 IGCSE and 17,500 EUR for Y12–Y13 AS/A-Level under alternative pricing).
• Boarding School Full-board residential accommodation in a 52-room boarding house with deluxe rooms at 28 m² each with en-suite bathrooms, lounge and gaming rooms, outdoor terrace, 24/7 supervision, three meals per day, supervised study sessions, and extracurricular activities. Full-year boarding fee is 29,900 EUR (alternative pricing 32,500 EUR) per year on top of tuition.
• Summer Course Seasonal educational programme offered during summer months for students seeking intensive English-language and academic learning experiences.

Quantifiable outcome

• 100% of alumni enrolled in their first-choice university
• +3 more outcomes

Named customers4 records

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Seven partnerships are on record, tiered core and minor.

• Cambridge Assessment International Education (CAIE)coreStrategic or Co-development Partner · 1 January 2013BISZ became the first Cambridge International School in Croatia in 2013. The school is an official Cambridge International Examination Center offering Cambridge Secondary (IGCSE) and Cambridge Advanced (International AS and A Level) qualifications. This partnership enables students to gain qualifications recognized by universities worldwide.
• COBIS (Council of British International Schools)coreStrategic or Co-development PartnerBISZ is a member of COBIS, the Council of British International Schools, providing network access and accreditation standards for British international schools worldwide.
• Fieldwork Education / IPCcoreStrategic or Co-development PartnerBISZ uses the International Primary Curriculum (IPC), a thematic, inquiry-led curriculum used by schools in over 90 countries worldwide. The IPC focuses on academic learning, personal growth, and international-mindedness.
• Kreativan razvoj Primary SchoolcoreStrategic or Co-development PartnerBISZ is the sister school to Kreativan razvoj Primary School, the oldest private primary school in Croatia operating since 1995. Kreativan razvoj has had foreign students from over 50 countries and provided the foundation for BISZ's establishment.
• Privatna gimnazija Dr. Časl (Dr. Časl Private Grammar School)coreStrategic or Co-development PartnerRelated secondary school under the same family ownership, opened in 2003, following the same educational philosophy and located in the same facility. Part of the integrated educational ecosystem.
• STK Dr. Časl Table Tennis ClubcoreStrategic or Co-development PartnerDr. Časl Table Tennis Club, President by the school's founder Dr. Martin-Tino Časl. Club has won European Champions League, multiple Croatian championships and cups. Provides sports excellence connection to the school with shared facilities and philosophy.
• UCASminorStrategic or Co-development PartnerPartnership with UCAS (Universities and Colleges Admissions Service) supporting students with university applications, particularly for UK universities.

Scale indicators8 records

Recent moves7 records

Expansion highlights4 records

Direct peers

• British International School of Prague: A leading British international school in Central Europe offering a similar UK National Curriculum with Cambridge IGCSE/A-Levels and boarding. Directly comparable to BISZ in curriculum, target market (expatriate and corporate families), and CEE positioning.
• British School of Bucharest: British-curriculum day and boarding school in Bucharest offering Cambridge IGCSE/A-Levels to a mixed expatriate and local premium market. Directly comparable in product mix (boarding + day, Cambridge pathway) and CEE positioning.
• International School of Zagreb: The other major international school in Zagreb, offering IB programmes. Directly competes with BISZ for the same expatriate, diplomatic, and Croatian premium families in the same city.
• British International School of Bratislava: British international school in Bratislava following the English National Curriculum with Cambridge IGCSE and A-Levels. Comparable to BISZ as a regional CEE British-curriculum school targeting expatriate and local premium families.
• British International School Budapest: Premium British international school serving Budapest's expatriate and diplomatic community with the UK National Curriculum and Cambridge programmes. Highly comparable in customer base (expat/diplomatic/corporate) and product (Cambridge IGCSE/A-Level pathway).

Others

• Kreativan razvoj Primary School: The Časl family's older Croatian-language private primary school (founded 1995), effectively BISZ's sister school. Provides feeder pipeline and shared philosophy, and serves as an internal comparand for tuition/margin benchmarks.
• COBIS (Council of British International Schools): Accrediting body and network for British international schools worldwide; BISZ is a member. Relevant ecosystem player for benchmarking quality, accreditation standards, and peer-school comparison.

Regional players

• Deutsche Schule Zagreb: German international school in Zagreb serving the local German-speaking expatriate and corporate community. Comparable premium local-zagreb international school but with German curriculum track.
• American International School of Zagreb: Local Zagreb competitor offering an American-style curriculum to expatriate and Croatian families. Competes for the same Zagreb-based premium families as BISZ but with a different curriculum track.

Broad incumbents

• Vienna International School: Large, well-established international school in Vienna offering IB programmes to a substantial expatriate community. Comparable in serving CEE premium/expat families but operates at much greater scale than BISZ.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• YouTubeyoutube.com/@britishschoolzagreb
• LinkedInlinkedin.com/company/british-international-school-of-zagreb

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about British International School of Zagreb