Founded
1912

As Kyungsung Foreign School; renamed 1964

Curriculum
British + IB

Dual primary pathways; unified IB from Grade 6

Years
Pre-K–G12

Ages 2–18, all-through

Location
Yeonhui-dong

~100,000 m² campus, Seodaemun-gu, by Yonsei University

Structure
Not-for-profit

WASC-accredited; Christian heritage (ACSI member)

Eligibility
Foreign-linked

Korean nationals need 3+ years overseas; 30% cap

The short version

The short version

Seoul Foreign School (SFS) is a not-for-profit, co-educational school founded in 1912 — Korea’s oldest international school — teaching ages 2–18 on a roughly 100,000-square-metre campus in Yeonhui-dong, Seodaemun-gu, next to Yonsei University.

Its distinguishing structure is a dual primary pathway: an Elementary School on the IB Primary Years Programme and a British School on the English National Curriculum, converging into a single IB pathway from Grade 6 through the Diploma Programme.↗↗

For a relocating family, the practical summary is this: SFS is the heritage anchor of Seoul international education — the largest foreign school in the city government’s own data, at the top of its published fee table, with fees split between Korean won and US dollars.

Eligibility is regulated: foreign-passport families are straightforward, while Korean-national children generally need three or more years of overseas residence, with Korean enrolment capped. The Christian heritage is real but the school serves 55 nationalities.

What the school is

Two schools under one 1912 roof

SFS was founded in 1912 as Kyungsung Foreign School by Ethel Van Wagoner Underwood — of the missionary family behind the institution that became Yonsei University — with one class of 18 students. It took its current name in 1964 and has occupied the Yeonhui-dong hilltop since 1957.

In 1981 it merged with the British School serving British-expatriate children, which the school describes as the first British school in Korea; that British School still operates today as a distinct section, inspected and approved by Ofsted British Schools Overseas.↗↗

The dual pathway works like this: in the primary years, families choose between the Elementary School (IB PYP) and the British School (English National Curriculum for English and maths plus the International Curriculum), both serving ages 3–11. From Grade 6 everyone converges into the IB Middle Years and Diploma Programmes.

SFS was one of the first 200 schools worldwide authorised to teach the IB, back in 1980, and its homepage cites 40 years of Diploma authorisation with an average IB score of 36.↗↗

The school remains anchored in its Christian heritage — it is a member of the Association of Christian Schools International — while serving a student body the school puts at 1,600 students across 55 nationalities. Accreditation is by the Western Association of Schools and Colleges.

In 2026 the British School added a niche distinction: recognition as South Korea’s first Forest Schools Development Centre.↗↗

Fees and the real cost

The won-and-dollar split, verified by City Hall

Seoul is one of the few cities where the government publishes school fees: the Seoul Metropolitan Office of Education’s table (September 2024) lists SFS with 1,958 enrolled students and annual fees of USD 40,990–49,610 — the largest roll and the top fee band among Seoul’s foreign schools.

That is the anchor figure against which everything else should be read.↗

SFS bills tuition in two currencies: a Korean-won portion plus a US-dollar portion for the school year running 10 August 2026 to 11 June 2027. Published 2026-27 elementary rates: partial-day Pre-K ₩18,280,000 + $7,185; full-day Pre-K 3–4 ₩26,740,000 + $12,960; Kindergarten–Grade 5 ₩27,285,000 + $13,500.

One-time new-student fees add a ₩450,000 application fee, a ₩650,000 registration fee and a ₩5,500,000 entrance fee. Aggregated 2026-27 totals run to roughly ₩55.6M-equivalent at Grades 9–12 — confirm the upper-division splits on the school’s own PDF, since the tabbed web page does not render them in all viewers.↗↗

Two budgeting notes. First, the dual-currency structure means your real cost moves with the won-dollar exchange rate — a won that weakens against the dollar changes the effective price even when the school holds its published figures.

Second, extras: the round-trip bus is ₩4,200,000 a year, there is a ₩450,000 senior fee in Grade 12, and early exam sittings cost ₩100,000 each. For scale: a KOTRA investor guide from the 1990s lists SFS high-school tuition at $14,013 plus ₩16.8M — the dollar figure has roughly tripled in three decades.↗↗

Admissions and eligibility

The three-year rule, and who actually gets in

Korea’s general admission conditions for foreign schools, per the government’s investment agency, are that the student holds a foreign passport, at least one parent is foreign, and the student passes a basic examination and interview.

Korean-national children can attend mainland foreign schools only if they have lived overseas for three or more years, and school regulations cap Korean-national enrolment at 30% — the Jeju Global Education City schools are the designed exception, allowed up to 100% Korean nationals.↗↗

Demand context has two moving parts. The 2018 relocation of US Forces Korea from Yongsan to Camp Humphreys pulled a large historic feeder population out of Seoul — the DoDEA high school at Yongsan closed in 2019 — while Korean demand for foreign-curriculum schooling keeps growing within the legal caps.

For foreign-passport families, the practical effect is that Seoul’s top schools are more approachable than their reputations suggest; for Korean-national returnee families, the three-year rule and the cap make timing and documentation the whole game. Ask the school early how your child’s overseas-residence evidence will be assessed.↗

The family experience

A forested campus in the city, and the daily run

The campus is the school’s great physical asset: a forested 100,000-square-metre hilltop in Yeonhui-dong, genuinely inside the city rather than in a satellite suburb — The Good Schools Guide’s review dwells on the setting, and the school’s Forest School recognition leans on it.

Yeonhui-dong and the neighbouring districts of Seodaemun, Mapo and the expat pockets around Itaewon and Hannam-dong are the practical housing catchment; the bus network exists, but many families live close enough to manage without it.↗

Parent sentiment in public sources is thin compared with Shanghai or Beijing — the most useful texture is structural rather than emotional: families choose SFS for the British-versus-IB primary choice, the heritage and the campus, and weigh it against YISS (central, American-Christian), Dwight (IB continuum, cheaper) and Chadwick in Songdo (top-tier IB, top-tier price).

Treat any ranking of these as a statement about your own priorities — curriculum, faith environment, commute and budget — not as a verdict on the schools.↗

Our readConfidence: Medium

Seoul’s heritage school — with City Hall’s numbers to check it against

The public record on SFS is unusually checkable for this market: a city-government fee table, an official school page disclosing the won-dollar split and one-time fees, a clear explanation of the dual pathway, and Ofsted BSO inspection of the British School.

Our confidence is Medium rather than High because this edition is document-based, the upper-division 2026-27 fee splits did not render in our text fetch of the official page, and founding details rest partly on reference works (one of which contradicts itself on 1912 versus 1913 — we follow the school’s own “Since 1912”).

The families SFS suits are clear: foreign-passport or qualifying returnee families who want the British-or-IB primary choice and a unified IB secondary, who value a century-deep institution on a genuine campus inside the city, and who can fund the top of the Seoul market.

The ones it does not suit: Korean-national families who cannot meet the three-year rule, strict budgeters, and families who want a purely secular or purely American-AP environment.

The single best habit when evaluating SFS: hold every number the school gives you up against the Seoul Metropolitan Government table — that habit alone puts you ahead of most applicants.

Take these to the school

Questions that move beyond the tour script

Eligibility and admissions

  1. Which eligibility category applies to our child — and for Korean-national returnees, exactly what overseas-residence evidence does the school accept?
  2. For our child’s year group and entry year, what does availability look like, and how full is the Korean-national quota?
  3. What do the entrance examination and interview involve at our child’s age?

Pathways and outcomes

  1. How should we choose between the British School and the Elementary (IB PYP) pathway — and can a child switch between them?
  2. May we see the full IB Diploma results distribution with cohort size, and the latest university-destination list?
  3. How does the Christian character of the school show up in the weekly routine, and how are non-Christian families included?

Cost and logistics

  1. What are the exact 2026-27 KRW and USD portions for our child’s division, and how has the split been set historically?
  2. Beyond tuition and the one-time fees, what should we budget for bus, exams, trips and the senior fee?
  3. Which bus routes serve our shortlisted neighbourhoods, and what is the realistic morning journey from each?

Continue your research

Choose your next step

Sources and further research

Where to verify and keep reading

We favor direct links to the exact page or document a family may need next. Access dates matter because admissions, tuition, leadership, and programs change.