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Cosmos International School

Bulgaria, Sofia

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The school at a glance
Instructs in English, Bulgarian
Fees €8,259
Ages 3 - 18 years
Pupil numbers 400
Type Co-educational
Opened 1930
Bus Service No
Availability Not shared by this school
Academic offering
Curriculum Cambridge (Primary), Cambridge (Secondary), Cambridge IGCSE, Cambridge A Levels, IB (DP)
Taught languages English, Bulgarian, German, Spanish, Russian, Italian
Strengths Languages, Sport, Visual and Creative Arts
Clubs Arts and Creative, Cultural and Language, Lifestyle and Wellbeing
Stages Preschool, Primary School, Middle School, Secondary School, Sixth Form
Introduction

Cosmos International School offers a Cambridge curriculum from preschool to upper secondary, including Cambridge Primary, Lower Secondary, IGCSE and options for A‑Levels or IB Diploma. The school serves ages 3 to 18 and uses English‑medium instruction alongside Bulgarian language studies. In Primary, students study Cambridge Primary English, Cambridge Primary Mathematics, Cambridge Primary Science and Art & Design, with Bulgarian language and literacy; additional languages include German, Spanish, Russian and Italian. Lower Secondary (grades 5–7) covers Cambridge English, Mathematics, Science, Art & Design, Digital Literacy and ICT, plus Bulgarian language, History and Civilization, Geography, Chemistry, Physics and Biology, with sports, theatre, yoga, gardening and camps; German, Spanish, Russian and Italian remain available. Upper Secondary (grades 8–12) centers on IGCSE, with pathways to IB or A‑Levels; core subjects include English, Mathematics, Science, History, Geography and ICT, with Wellbeing and options like Economics, Travel and Tourism and Foreign Languages. Curriculum runs across ages.

cischool.bg

school, 2121 Osoitsa, Bulgaria

Vibes and Culture
The school has not added this information
The Essentials

Cosmos International School has 400 pupils, instruction in English, Bulgarian.

Location
Located in the village of Osoitsa in the Gorna Malina municipality near Sofia, Bulgaria. The school address is Osoitsa, Cosmos Intl. School. The village of Osoitsa sits within the Sofia region and the school serves residents of Osoitsa and nearby areas.

Stages
Primary; Lower Secondary; Upper Secondary & Advanced

Type
International school

School day structure
School days Monday–Friday 08:00–18:00.

Bus service
Transportation with school buses from and to Sofia; transportation with school buses in the region. Fees: from and to Sofia 250 EUR; region 200 EUR.
Diving Deeper
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Fees

Annual tuition at Cosmos International School ranges from EUR 8,259 for 2026/27.

Application fees
- The application fee for a trial day is 100 EUR (195.58 BGN). This fee includes trial days, personalised feedback on the trial, meals during the trial (fruit, lunch, PM snack) and transport services if required.

One-off / upfront fees
- School supply fee (payable annually): 300 EUR (586.75 BGN).
- Deposit fee (place-holding/security): 1,000 EUR (1,955.83 BGN).

Tuition fees by year group and payment option
- For the 2026/2027 academic year (general school rate):
- Monthly paid tuition (September–June): 850 EUR per month (1,662.46 BGN).
- Tuition paid on a 5-month plan (with 3% discount): 4,122 EUR total for the spring and autumn terms.
- Annual tuition paid in full (with 8% discount): 7,820 EUR for the school year (15,294.59 BGN).
- A special monthly rate for families in the local region: 680 EUR per month (1,329.96 BGN).

- For the 2025/2026 academic year (detailed by school stage):
- Primary: application fee 100 BGN (50 EUR); school supply fee 400 BGN (210 EUR); deposit 1,000 BGN (500 EUR); monthly tuition (Sept–June) 1,400 BGN (715 EUR); 5-month plan 6,650 BGN (3,392 EUR); annual paid in full 12,600 BGN (6,426 EUR).
- Lower Secondary: application fee 100 BGN (50 EUR); school supply fee 500 BGN (260 EUR); deposit 1,000 BGN (510 EUR); monthly tuition (Sept–June) 1,400 BGN (715 EUR); 5-month plan 6,650 BGN (3,392 EUR); annual paid in full 12,600 BGN (6,426 EUR).
- Upper Secondary & Advanced (2025/26 figures): application fee 100 BGN (50 EUR); school supply fee 500 BGN (260 EUR); deposit 1,000 BGN (510 EUR); monthly tuition (Sept–June) 2,000 BGN (1,022 EUR); 5-month plan 9,500 BGN (4,857 EUR); annual paid in full 18,000 BGN (9,203 EUR). A limited-time discounted monthly figure and alternative annual amounts were also published for specific enrolment promotions.

Billing schedule and payment terms
- Monthly billing option runs September through June (ten monthly installments).
- Alternative billing options are available with discounts: a multi-payment 5-month plan (discount applied) and a one-payment annual option (larger discount applied). Specific discount rates shown are: 3% for the 5-month plan and 8% for annual payment in the 2026/2027 schedule; earlier published schedules showed 5% (5-month) and 10% (annual) discounts for 2025/2026.
- A deposit is required to secure a place (deposit amount listed under one-off fees).

Boarding (where applicable)
- Boarding was published as an option in the 2025/2026 materials at 600 BGN per month (255 EUR per month) or 5,400 BGN (2,775 EUR) for the full school year. Boarding details were listed separately from day-student tuition.

Other costs and recurring extras
- Food (fruit, lunch, PM snack): 180 EUR (352.05 BGN) per year in the 2026/2027 schedule; earlier figures for 2025/2026 appeared at different BGN/EUR amounts.
- Transportation (school buses): from/to Sofia 250 EUR (488.96 BGN) per year; regional routes 200 EUR (391.17 BGN) per year.
- Clubs and extracurricular activity fees (examples): judo 60 EUR (117.35 BGN); gymnastics 45–60 EUR depending on year and offer; breakdance 45 EUR; folk dance 45–50 EUR; chess 30–40 EUR; various clubs such as volleyball, handball, comics, film, art typically range around 20–39.12 EUR/BGN listed equivalents per activity. Camps and competition/olympiad fees are charged according to the specific offer and are payable in addition to tuition. Second foreign language books are listed at 80 EUR (156.47 BGN) where applicable.

Discounts and special rates
- Early-enrolment, sibling and local residence discounts have been published: example discounts include a high-school limited-time enrolment discount, second/third child discount of 10% (capped so total discounts cannot exceed 15%), and a special family rate (e.g., a published special rate of 1,000 BGN for families residing in Elin Pelin and Gorna Malina on earlier schedules).

Refund information
- Published fee materials list application, supply, deposit and tuition amounts but do not include a clear standalone refund policy or explicit text on which fees (if any) are refundable or non‑refundable in every circumstance within the fee documents reviewed. The deposit and application fees are shown as required payments but specific refund terms are not stated in the publicly published fee sheet and fee summary documents accessed.

Fee payment options
- The publicly posted fee schedules and fee PDFs list amounts, payment plans and discounts but do not specify accepted payment channels (for example, explicit mention of bank transfer, credit card, online payment provider or in-person payment methods is not included in the published fee documents reviewed). For confirmed accepted payment channels, contact by the school's published office email or telephone is required.

Notes on what was found and remaining items to confirm
- The fee overview above presents the published tuition, one-off charges, discounts, extras and boarding rates as published in the school's fee documents for 2026/2027 where available and for 2025/2026 where stage-specific or boarding figures were shown. The published materials reviewed do not contain an explicit, line-by-line refund policy or a list of accepted payment channels; those items were not stated in the fee schedules and fee summary documents accessed.
Academics

Cosmos International School teaches Cambridge (Primary), Cambridge (Secondary), Cambridge IGCSE, Cambridge A Levels, IB (DP) for students aged 3 to 18.

Curriculum
Cosmos International School uses the Cambridge International curriculum from preschool through upper secondary. In Primary, students study Cambridge Primary English, Cambridge Primary Mathematics, Cambridge Primary Science, and Cambridge Primary Art & Design, alongside Bulgarian language and literacy, Mathematics, the Natural World, and Man and Society; additional languages offered include German, Spanish, Russian, and Italian. Lower Secondary (5th–7th grade) covers Cambridge Lower Secondary English, Mathematics, Science, Art & Design, Digital Literacy and ICT Starters, plus Bulgarian language and literacy, History and Civilization, Geography, Chemistry, Physics, and Biology, with sports, theater, yoga, gardening and camps, and additional languages German, Spanish, Russian, Italian. Upper Secondary (8th–12th grade) centers on IGCSE, with foundations for IB or A-levels; subjects include English, Mathematics, Science (Chemistry, Biology, Physics), History, Geography, ICT, Wellbeing, and options such as World Literature, Biology Advanced, Chemistry Advanced, Physics Advanced, Economics, Business Studies, Travel & Tourism, ICT Advanced, and Foreign Languages, Art & Design, Bulgarian language and literature; Group I Language A includes English and Bulgarian; Group II Language B includes English, German and Spanish; a second foreign language is offered as well.
Wellbeing
The school has not added this information
Parent Experience
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Facilities
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Extra-Curricular Activities
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Languages
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Reputation
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Admissions

Admissions
The application fee for Cosmos International School is 100 BGN or 50 EUR. The fee includes trial days for your child; personalised feedback on your child's performance during the trial days; meals provided during the trial period (fruit, lunch, PM snack); and transport services if required. The 2026/2027 fee structure lists the full set of charges for Primary, Lower Secondary and Upper Secondary with monthly tuition, discounts and other fees.
School Events
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