The previous pieces in this pillar handled the structural decisions. Who owns the school, what teachers earn, what the city and tier costs, and whether the bilingual middle ground is worth a proper look. Today we look at the next layer of decision-making that British expat families face once they’ve chosen a school category.
Which curriculum?
International schools across Asia offer four major curriculum tracks for the senior years (Years 10-13, or Grades 9-12 in American terms). British (IGCSE plus A-Levels), International Baccalaureate (IB Diploma Programme), American (High School Diploma plus AP), and Australian (HSC). Each carries different costs, different teacher availability, different exam structures, and different university outcomes. Most British families default to whatever curriculum their preferred school offers without seriously comparing the alternatives.
That default is often the wrong one. The curriculum choice affects roughly £20,000-£40,000 in additional family costs over the full school career, and it materially shapes where the child can apply to university. Today’s piece is the cost-and-outcome comparison nobody runs.
The four curricula, in brief
British (IGCSE plus A-Levels)
The Cambridge IGCSE and Edexcel International A-Level system. Students take IGCSEs in Years 10-11 (typically 8-10 subjects), then A-Levels in Years 12-13 (typically 3-4 subjects). A-Levels are deeply specialised, with three subjects forming the core university entry credential. Pass-fail at A*-E grading, with AAA typically required for top UK universities.
Widely available across Asian international schools. The default at schools like Bangkok Patana (lower years), Harrow Bangkok, Shrewsbury, Tanglin Trust, Dulwich Singapore, and many others. The most “British” of British expat education options.
International Baccalaureate (IB Diploma Programme)
A structured two-year programme in Years 12-13. Students take six subjects (three Higher Level, three Standard Level), plus three core components: Theory of Knowledge (TOK), Extended Essay (EE), and Creativity-Activity-Service (CAS). Total of 45 points possible. 38+ is typically considered equivalent to A*AA. 40+ for Oxford. Russell Group acceptance generally requires 34-42 points depending on university and course.
Increasingly common across Asian international schools. The default at NIST International Bangkok, UWCSEA Singapore, ISB Bangkok (alongside US Diploma), and Bangkok Patana (post-Year 11). Universities understand the qualification well, and the IB’s breadth can be an advantage for children who have not yet narrowed their academic direction.
American (US High School Diploma plus AP)
The standard US system. Four-year high school (Grades 9-12) with continuous assessment producing a transcript with GPA. Students take Advanced Placement (AP) courses on top of the diploma curriculum, with AP exams scored 1-5. Top universities expect 5+ AP courses for competitive applicants. Accepted at Oxford, Cambridge, Imperial and other Russell Group universities, though sometimes with additional requirements.
Common at International School Bangkok (ISB), Singapore American School, Hong Kong International School (HKIS), and most schools branded “American International.” The strong American schools in Asia routinely place graduates into highly selective US universities, demonstrating that this pathway produces serious outcomes when the school is academically strong.
Australian (HSC and equivalents)
The Higher School Certificate (HSC, New South Wales) and equivalent state qualifications. Two-year senior school programme with Australian Tertiary Admission Rank (ATAR) as the university entry score. Less common in Southeast Asia than the other three, but available at Australian International School Singapore (Cognita) and a handful of others. Strong pathway to Australian and New Zealand universities, accepted by UK universities with conversion to UCAS tariff equivalents.
For most British expat families in Asia, the realistic choice is between the first three. Australian is a niche option, useful primarily for families intending to settle in Australia.
The cost premium of curriculum choice
Here is where it gets interesting. Different curricula carry different fee structures at most Asian international schools, and the differences compound over the senior years.
The general pattern across Asia:
IB Diploma typically carries a £2,000-£5,000 annual premium over the equivalent A-Level fee at the same school. This reflects higher exam fees (the IB Diploma involves more papers and longer assessment processes), additional staffing (Theory of Knowledge teachers, Extended Essay supervisors, CAS coordinators), and the IB’s own per-student levy charged to schools.
American Diploma plus AP is generally similarly priced to A-Levels, with AP exam fees adding £400-£800 per student per year at the senior level. Some schools charge differently for the High School Diploma stream vs the IB stream when both are offered.
Australian curriculum is typically slightly cheaper than IB but on par with A-Levels.
Practical numbers at the senior level (Years 12-13 or Grades 11-12) in 2026:
| Curriculum | Tuition example | Exam fees | Two-year senior cost |
|---|---|---|---|
| British A-Level (Bangkok mid-tier) | THB 700,000/year | THB 30,000 | THB 1,460,000 (£34,000) |
| IB Diploma (Bangkok mid-tier) | THB 750,000/year | THB 90,000 | THB 1,590,000 (£37,000) |
| US Diploma + AP (Bangkok mid-tier) | THB 720,000/year | THB 40,000 | THB 1,480,000 (£34,500) |
| British A-Level (Singapore top) | SGD 48,000/year | SGD 2,500 | SGD 98,500 (£57,000) |
| IB Diploma (Singapore top) | SGD 52,000/year | SGD 4,500 | SGD 108,500 (£62,900) |
| US Diploma + AP (Singapore top) | SGD 50,000/year | SGD 3,000 | SGD 103,000 (£59,700) |
The IB premium across two senior years runs £3,000-£6,000 per child at most schools. For two children, that’s £6,000-£12,000 in additional costs just for the curriculum choice. Most families don’t notice this because IB schools tend to start the cost ramp earlier in primary, where the differences are smaller.
Across a full primary-to-senior education at a school that offers IB throughout, the cumulative IB premium can reach £15,000-£30,000 per child, or £30,000-£60,000 for two children. This is real money that families typically don’t budget for separately.
What each curriculum actually delivers for university entry
Cost is one side. The other side is what the curriculum unlocks. The honest data here is more nuanced than the marketing.
A-Levels remain the dominant UK university entry pathway. This skew reflects historic familiarity and the fact that most UK students study A-Levels. Russell Group universities accept both A-Levels and the IB Diploma in principle, with high IB offers often requiring 38-40+ points, but the volume of UK applicants tilts heavily toward A-Levels.
For a British family targeting UK universities, A-Levels remain the most direct pathway. This is partly inertia, partly genuine institutional familiarity, and partly the deeper subject specialisation that A-Levels offer. A student with AAA in Mathematics, Further Mathematics, and Physics has demonstrated something that universities can read clearly. The same student via IB has demonstrated breadth, which is differently valuable.
IB Diploma is increasingly accepted everywhere globally and is the dominant pathway at “true” international schools. The IB advantage is that it travels seamlessly: an IB Diploma is recognised identically by UK, US, Canadian, Australian, Singaporean, and European universities. For families uncertain about which country their child will eventually attend university in, IB removes the lock-in.
The IB also has real academic advantages. This is partly selection bias (IB schools tend to attract academically motivated families), and partly genuine pedagogical strength: extended writing, breadth, independent research, and explicit workload management all map well to university study.
For Oxbridge specifically, the IB requires 40+ points with HL 6s or 7s in relevant subjects, which is genuinely demanding but achievable for strong students. Cambridge has historically preferred A-Levels for sciences because of the depth of laboratory preparation, though it accepts IB at high scores.
American (US Diploma plus AP) is the most flexible system internationally. The transcript-plus-AP model means students can demonstrate sustained academic engagement across multiple years (GPA) plus subject-specific depth (AP). For US universities, this is the natural pathway. For UK universities, AP is accepted but typically requires 5+ AP exams with scores of 4 or 5 in relevant subjects.
The most compelling evidence comes from school outcomes. The top American schools in Asia publish college counselling and matriculation data showing routes into highly selective US universities. This is roughly equivalent to top UK Russell Group placement, demonstrating that the American pathway from a strong Asian school produces world-class outcomes.
The structural trade-off: American curriculum is best for families likely to apply primarily to US universities or for families who value breadth and flexibility over subject specialisation. A British family planning UK university entry should think carefully before defaulting to American curriculum just because the school they like uses it.
The curriculum-by-school matrix
The choice is rarely abstract. In practice, you choose a school, and the school largely chooses your curriculum. The exceptions are schools offering multiple curricula in parallel.
| Bangkok school | British | IB | American |
|---|---|---|---|
| Bangkok Patana | Yes (lower years) | Yes (Years 12-13 IBDP) | No |
| Harrow Bangkok | Yes (full A-Level pathway) | No | No |
| Shrewsbury Bangkok | Yes (full A-Level pathway) | No | No |
| NIST | No | Yes (full IB continuum) | No |
| ISB | No | Yes (IBDP option) | Yes (US Diploma) |
| St Andrews Bangkok | Yes | Yes (IBDP option) | No |
| Singapore school | British | IB | American |
|---|---|---|---|
| Tanglin Trust | Yes (A-Level option) | Yes (IBDP option) | No |
| UWCSEA | No | Yes (full IB continuum) | No |
| Singapore American School | No | No | Yes (US Diploma + AP) |
| Dulwich Singapore | Yes (full A-Level pathway) | No | No |
| Australian International | Yes | Yes | No |
| Hanoi school | British | IB | American |
|---|---|---|---|
| BIS Hanoi (Nord Anglia) | Yes | Yes (IBDP option) | No |
| UNIS Hanoi | No | Yes (full IB continuum) | No |
| Concordia International | No | No | Yes (US Diploma + AP) |
| BVIS Hanoi (bilingual) | Yes (Cambridge IGCSE/A-Level) | No | No |
A few patterns emerge.
British curriculum schools dominate the Bangkok premium tier. If you want pure A-Levels in Bangkok, Harrow or Shrewsbury are the obvious choices. Bangkok Patana offers both (A-Levels through Year 11, then IBDP from Year 12), which is unusual.
IB-only schools include UWCSEA, NIST, and UNIS Hanoi. These are typically academic standouts and tend to attract families specifically committed to the IB philosophy. The IB-only commitment is not a downside, but it does remove the option to pivot to A-Levels later.
American-curriculum schools (ISB Bangkok, SAS Singapore, HKIS, Concordia Hanoi) are excellent if the US system suits your family. For British families targeting UK universities, they require slightly more diligence in the application process.
The hidden curriculum: what’s not in the syllabus
Beyond the academic curriculum, every school has a “hidden curriculum” that shapes who your child becomes. This is harder to measure but matters as much as the exam results.
British curriculum schools in Asia tend to attract British, Australian, South African, and Commonwealth expatriate teachers. The cultural framing is broadly Anglo, with structured academic emphasis, formal uniform requirements, house systems, and a recognisable “school” feel that maps to UK independent school traditions. For British families who want their children’s school experience to feel continuous with UK norms, this matters.
IB schools tend to be more international in cultural framing. Teachers come from a wider range of countries. The pedagogical emphasis is on inquiry-based learning, internationalism, and explicit reflection on global issues. The student body tends to be more diverse internationally, which has implications for friendship networks, cultural understanding, and the kind of adult your child becomes.
American schools carry a distinct cultural framing: more informal, more emphasis on extracurriculars (sports, leadership, service), competitive admissions framing from Year 9 onwards, and a strong orientation toward US college applications. For British families used to UK educational culture, American schools can feel different in ways that take adjustment.
These cultural differences are not better or worse, but they matter. A British child who spends Years 5-13 at an American school in Singapore will emerge with subtly different academic instincts, social patterns, and university expectations than the same child at Tanglin Trust. Neither is wrong, but the family should choose deliberately.
The structural questions to ask
Before committing to a curriculum, three questions are worth running explicitly.
One: where is your child likely to go to university?
If the answer is “definitely UK,” A-Levels remains the most direct pathway, with IB as a strong alternative. American curriculum works but requires more adaptation.
If the answer is “definitely US,” American curriculum (US Diploma + AP) is the natural choice, with IB as a strong alternative.
If the answer is “we don’t know yet,” IB Diploma is the most country-agnostic option. It travels well everywhere, and the breadth means students don’t lock themselves out of options by specialising too early.
For most British expat families with a child currently aged 5-12, the honest answer is “we don’t know yet.” University planning at age 8 is mostly fantasy. The IB option preserves flexibility, which has real value.
Two: what kind of learner is your child?
A-Levels reward focused specialisation. A child who knows by age 14 that they want to study physics, chemistry, and maths (because they want to be an engineer) is well-served by A-Levels. The deep three-subject focus matches their interest.
IB rewards breadth and structured organisation. A child who is academically strong across many subjects, who manages their own workload well, and who benefits from explicit reflection (TOK, Extended Essay) thrives in IB.
American curriculum rewards sustained performance and extracurricular engagement. A child who shows up consistently, builds a portfolio of activities, and benefits from continuous assessment more than high-stakes exams suits this system.
These are real differences in pedagogical fit, not just exam style. A wrong curriculum match can affect academic outcomes significantly.
Three: what’s the cost difference at the schools you’re considering?
In most cases, the curriculum cost difference is £2,000-£5,000 per year per child at the senior level. Over Years 12-13 for two children, that’s £8,000-£20,000. This is not a small number, but it’s small relative to total fees of £80,000-£200,000+ per child.
The decision should not be primarily cost-driven, but the cost difference is worth knowing. If a family is on the edge of affordability at a top British school, an IB option at the same school may be the affordability breaker that pushes them to a mid-tier alternative. Worth modelling.
The takeaway
The four major curricula available to British expat families in Asia each have distinct cost structures, university outcomes, and cultural framings. The IB Diploma carries a £15,000-£30,000 premium over British A-Levels across a full school career. American curriculum is competitive on price with British and produces strong outcomes for US-oriented families. Australian is a niche option for families settling in Australia.
For most British families, the curriculum question reduces to three considerations: where the child will likely attend university, what kind of learner they are, and what the school they prefer actually offers.
The honest defaults:
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Targeting UK universities, with a focused academic specialist child: A-Levels at a British curriculum school (Harrow, Shrewsbury, Bangkok Patana, Tanglin Trust). Most direct pathway.
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Uncertain about university destination, with a broad academic child: IB Diploma. Maximum flexibility, accepted everywhere, demanding but rewarding.
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Targeting US universities, with a well-rounded child: US Diploma plus AP at an American curriculum school (ISB, SAS, HKIS). Natural pathway with strong outcomes.
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Wanting bilingual integration, with a flexible long-term horizon: Cambridge IGCSE/A-Level at a bilingual school like BVIS Hanoi or Sarasas Ektra Bangkok. Strong outcomes at much lower cost.
The school’s marketing department will tell you that its curriculum is the best. Schools have to do this. The honest truth is that all four curricula produce excellent outcomes for the right children at strong schools. The cost differences matter modestly, the university acceptance patterns matter somewhat, and the cultural and pedagogical fit matters most.
In the next pieces in this pillar, we look at where the school fees actually go (the operating budget breakdown that finally answers Day 2’s hanging question), the demographic shift that’s quietly changing who attends international schools across Asia, and the hidden capital fees that add £20,000-£50,000 to total family costs before any tuition is paid.
The curriculum decision is one of the smaller decisions in international education. The school choice, the city choice, and the question of whether to be in the international school system at all are far more consequential. But the curriculum question is the one most families get asked at parent evenings, so it’s worth understanding properly.