UK universities make offers on three A Levels. Which three is decided at the end of Year 11, often in a rushed week, and it is the single most consequential academic decision a student in the British system makes before eighteen.
Some degrees require specific subjects and will not accept substitutes. A student who discovers this in Year 13 has lost two years of runway.
Start with the entry requirements, not the interests
Every UK university publishes entry requirements per course on the course page. Before any family discussion, open three course pages at three different universities and copy down two lines only: required subjects and preferred or useful subjects.
That document is the decision. Everything else — forum advice, what a cousin did, what the school assumes — is guesswork.
Subject requirements by course area
| Course | Usually required | Usually expected alongside | Third subject |
|---|---|---|---|
| Medicine / Dentistry | Chemistry | Biology | Often free, but a third science or maths is common |
| Veterinary Medicine | Biology and Chemistry | — | Free choice |
| Engineering | Maths | Physics | Further Maths or Chemistry |
| Physics / Astrophysics | Maths and Physics | Further Maths often preferred | Free |
| Computer Science | Maths | Computer Science or Physics | Any analytical subject |
| Economics | Maths (at most competitive universities) | Economics not always required | An essay subject |
| Architecture | Varies widely | Art, Maths or Physics depending on the school | Portfolio usually required |
| Law | No required subject at most universities | An essay-based subject | Free |
| Psychology | Many courses want a science | Biology or Maths | Free |
| English / History | The subject itself | A second essay subject | Free |
These are common patterns, not rules. Requirements differ between universities and change between admission cycles — the course page for the year of entry is the only authority.
Five mistakes that close doors
- One science for medicine. Chemistry alone rarely suffices; most medical schools want a second science, usually Biology.
- Dropping Maths because the target course "is not mathematical". Economics, Psychology and many Business degrees at competitive universities want it. Maths is the subject that keeps the most doors open.
- Three subjects that are too similar. Maths, Further Maths and Physics is an excellent engineering combination and a very poor position from which to change direction.
- Assuming Further Maths counts as a separate subject everywhere. Some courses count it, some treat it as part of Maths. Read the wording literally.
- Choosing a subject the student has never studied. Starting Economics or Psychology cold at A Level is possible, but the first term is steeper than it looks.
Three subjects or four?
Most UK offers are made on three. A fourth helps in two situations: applying to the most competitive courses where Further Maths is expected, or genuine indecision between two very different paths. Otherwise, three subjects at high grades beat four at middling grades, because the offer is made on three and grades are what it asks for.
The IGCSE to A Level step
The gap is wider than students expect, particularly in Maths and Physics. A student with an A or a 7 at IGCSE can find themselves at a C in the first term of Year 12 — not because their ability fell, but because the question type changed. The first three months are when that is corrected, and the students who treat the autumn of Year 12 as a settling-in period usually pay for it in the summer.
If you are still deciding between routes rather than subjects, our comparisons of IB and A Level in the UAE and AP and A Level cover that decision.
A workable process
- Name three plausible courses, not one.
- Pull requirements for each from three different universities — nine pages.
- The subject that appears in all nine is your first subject, and it is not negotiable.
- The second comes from whatever is required by more than one of the three courses.
- The third is the subject the student is genuinely strongest in. Grades matter as much as subject names.
Common questions
Can a subject be changed after Year 12 starts?
Usually within the first few weeks, subject to timetable and class space. Ask immediately rather than waiting to see how it goes.
Do universities care which exam board?
No. They look at the subject and the grade. Our guide to IGCSE grading explains the equivalent point at the earlier stage.
What if the student has no idea what to study?
Take the combination that preserves the widest range: Maths, one science, one essay subject. It is the least restrictive credible set.
One step this week
Open two course pages for two courses your child has mentioned, and write the required subjects on a single sheet. If a subject appears on both, a third of the decision is already made.
To review a shortlist with a subject specialist, message us on WhatsApp.
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