NUS and NTU set specific Higher Level subject prerequisites tied to each named degree programme — usually Higher Level Mathematics: Analysis & Approaches (MAA), plus a named science for Medicine and most Engineering routes. SMU runs a broad-based first-year curriculum with almost no subject gating at all, except for its Economics and Computer Science majors, which still require a pass in IB Maths at either level. None of the three publishes a minimum IB point score.
The requirements matrix, by faculty
This is a summary of the published subject-prerequisite pattern for six commonly asked-about faculty areas. NUS and NTU publish dozens of programme-level variations under each faculty — the rows below reflect the pattern that holds for most programmes in that area, not every named double-degree or minor combination. Always check the exact target programme on the university's own page before finalising subject choices.
| Faculty area | NUS | NTU | SMU |
|---|---|---|---|
| Medicine | Pass in HL Chemistry, and either HL Biology or HL Physics. Applicants submitting predicted grades must also supply either UCAT or SAT/ACT-with-Writing plus AP Exams. | HL Chemistry, and either HL Biology or HL Physics (Lee Kong Chian School of Medicine). UCAT and interview required of every applicant, regardless of predicted or actual grades. | No medical programme. |
| Law | Single-honours LLB doesn't appear in NUS's own published subject-prerequisites table at all — entry is gated by a written test and interview rather than a named science/maths subject. Combined routes (e.g. Economics and Law) do require HL MAA plus at least 5 points in SL/HL English; interview compulsory either way. | No first-degree LLB. NTU's Law School offers only the graduate-entry Juris Doctor, open to holders of any bachelor's degree — not a route from IB straight into a law degree. | Broad-based entry — no subject prerequisite documented for Law beyond SMU's standard English-proficiency requirement. |
| Business / Management | Most quant-heavy Business double degrees (e.g. Business Administration and Business Analytics) require HL MAA. The Economics and Business Administration route is lighter — SL/HL MAA or HL Maths: Applications & Interpretation (MAI) accepted. | Nanyang Business School's core Business and Accountancy programmes need only a good grade in Mathematics at SL, plus a good grade in English at SL. Quant-heavier double degrees (e.g. Accountancy and Data Science & AI) step up to HL Maths. | No fixed Maths requirement for the Business major itself — broad-based entry. |
| Economics | Not offered as a bare single major in NUS's published table — appears via combined majors (Economics and Business Administration, Economics and Law, Economics with Management), each requiring SL/HL MAA or HL MAI. | A good grade in Mathematics at SL, plus a good grade in English at SL — one of the lightest quant gates on this table. Economics and Data Science (double major) steps up to HL Maths. | HL or SL Maths — either level accepted. One of only two SMU majors with a fixed subject gate. |
| Engineering | HL Mathematics: Analysis & Approaches (MAA). NUS's published Engineering rows do not name a required HL science subject. | HL Mathematics, and one of Physics / Chemistry / Biology / Computer Science at HL — a named science is compulsory across all Engineering disciplines. | No standalone Engineering programme. |
| Computing / Computer Science | HL Computer Science, or HL MAA, or HL Physics; some combined majors instead accept SL MAA or HL MAI. | HL Mathematics, or HL Physics/Computer Science — a Maths-or-named-science route, similar in breadth to NUS's own three-subject option. | HL or SL Maths — either level accepted. The other of SMU's two gated majors. |
Sources: NUS Office of Admissions, IB/A-Level/NUS High School programme-prerequisite documentation (accurate as of February 2026); NTU Office of Admissions, minimum subject requirements for International Baccalaureate applicants (correct as at October 2025); SMU Undergraduate Admissions, published IB Diploma guidance. Cross-checked directly against each university's own pages — this table reflects general subject-area patterns, not every named programme. Re-verify each January; requirements are reviewed annually and can change without notice.
Why the three universities look so different on paper
The gap in this table isn't a gap in how rigorous each university is — it's a structural difference in how students are admitted.
NUS and NTU admit directly into a named major. An applicant to NUS Engineering is an Engineering student from day one, so the subject prerequisite is written to protect that major's first-year workload — hence the consistent HL Mathematics requirement, and NTU's additional HL science subject for every Engineering discipline.
SMU runs a broad-based, US-style first year. Students enter without a declared major and choose one after exposure to multiple disciplines. Because almost nobody is locked into a technical major on day one, SMU has almost nothing to gate on subject choice — the two exceptions, Economics and Computer Science, exist because both majors have an unavoidable technical floor no amount of first-year catch-up teaching can fully substitute for.
What this means practically
A student who drops HL Maths too early narrows the door at NUS and NTU far more than at SMU — but SMU is not a "no-Maths" back door into Economics or Computer Science specifically. Those two majors carry the same Maths floor everywhere.
Maths: Analysis & Approaches vs Applications & Interpretation
This is the single most consequential subject decision on this whole page, and the three universities don't treat it identically.
NUS distinguishes between them
NUS's default requirement for its quant-heaviest programmes (most Engineering, Computing, and Business Analytics routes) is specifically HL MAA — Higher Level Mathematics: Analysis & Approaches. HL MAI is accepted as an alternative pathway for a defined set of lighter-quant combined majors (Economics and Business Administration, Architecture, Industrial Design among them), but it is the exception on NUS's table, not the default.
NTU and SMU don't distinguish AA from AI in their published wording
NTU's own minimum subject requirements simply say "Mathematics at Higher Level" or "Mathematics at Standard Level" — the published document does not name AA or AI separately for any programme reviewed here. SMU's guidance is the same: "a good pass in IB Diploma Math at Higher Level or Standard Level," with no AA/AI distinction stated.
The practical read
A student aiming specifically at NUS Engineering or Computing should not assume HL MAI is a safe substitute for HL MAA — check the named programme first. A student whose realistic target set is NTU and SMU has materially more flexibility on which Maths course to sit.
You don't need to have taken IB Economics to study Economics at university
The common assumption
Parents often assume a Singapore university Economics degree requires the applicant to have sat IB Economics at school. None of the three universities' published subject-prerequisite tables name IB Economics as a required subject for their economics-related programmes.
Across NUS, NTU and SMU, the subject that actually gates entry into an Economics-related programme is Mathematics — not Economics itself. NUS's economics combined majors ask for SL/HL MAA or HL MAI; NTU's Economics major asks for a good grade in SL Maths; SMU's Economics major asks for HL or SL Maths, either accepted. A student who has never taken IB Economics but holds a strong Maths result is not excluded on paper from any of these routes.
That doesn't make IB Economics irrelevant — a student who has already built comfort with the subject's quantitative and evaluative demands typically transitions into a university Economics or Business curriculum with far less friction, and a strong IB Economics grade is still a genuine, visible signal of subject interest and ability on an application. It simply isn't the gatekeeping requirement itself.
Subject-combination mistakes that quietly close doors
Choosing HL Maths: Applications & Interpretation on the assumption it's treated identically to HL Analysis & Approaches everywhere.
Assuming Engineering everywhere requires a named HL science subject, the way NTU does.
Treating SMU's broad-based entry as a way to study Economics or Computer Science without a strong Maths result.
Building a subject combination around Law entry the same way one would for Medicine or Engineering.
When these choices actually get locked in
Most IB World Schools in Singapore have students confirm their six-subject combination — including HL/SL split — before the start of the Diploma Programme, typically during the final term of Year 11 (pre-DP / MYP5). Once teaching begins in Grade 11, changing HL Maths or a science subject usually means restarting that subject from week one alongside a class that's already progressed, which is why this decision is worth treating seriously well before it's forced by a school deadline rather than after.
Students who've navigated this exact decision
These are Google reviews from KS Academia Prep's IB Economics students — shown here because they speak directly to outcomes in the subject this matrix is designed to help students plan around.
"The best econs tuition you can find in Singapore. I started taking lessons from here since IGCSE econs all the way upto IB econs. I successfully managed to gain both a 7 in HL econs and A for econs extended essay."
"Taking classes from Jason tutor was an amazing experience. He focuses on both the intuitive understanding of economic concepts and the practical methods to score high marks in the actual exam. Thanks for Jason, I was able to get a 7 for economics on the IB Final exam."
Frequently asked questions
Do NUS or NTU publish a minimum IB point score?
Does SMU require any IB subjects at all?
Is Higher Level Maths always required for Engineering in Singapore?
Do I need IB Economics to apply for an Economics degree at NUS, NTU or SMU?
Is HL Maths: Applications & Interpretation treated the same as HL Analysis & Approaches?
When do Singapore international school students actually choose their IB subjects?
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Kirby designs KS Academia Prep's IGCSE Economics curriculum and teaches IB Economics. In his free time he can be found writing articles and content to better improve the site and reduce misinformation.
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- NUS Office of Admissions — Programme prerequisites for applicants with A-Level, IB Diploma or NUS High School Diploma (accurate as of February 2026)
- NUS Yong Loo Lin School of Medicine — NUS Medicine pre-requisites
- NTU Office of Admissions — Minimum Subject Requirements for Students with International Baccalaureate Diploma (correct as at October 2025)
- NTU Lee Kong Chian School of Medicine — admission requirements
- SMU Undergraduate Admissions — International Baccalaureate Diploma admissions guidance