IGCSE Subjects List 2026–27: The Five Groups, Key Codes, and How Many to Take

Cambridge offers 70+ IGCSE subjects, organised into five groups — and no student on earth takes them all. The real subjects list, the one that matters to you, is the 5–9 subjects your school offers and your future plans reward. This guide gives you the full picture: the five groups and what lives in each, the syllabus codes you'll see on every past paper, how many subjects students actually take, and the two or three rules (tiers, group balance, equivalency counts) that quietly decide whether a subject list is well-built or just long.

The five groups, and the shape of a balanced list

The subjects students actually take, with codes

Names repeat across boards and levels; codes don't. Every Cambridge IGCSE syllabus has a four-digit code that appears on the question paper, the mark scheme and the certificate — learn yours and past-paper hunting gets ten times faster. These are the mainstream picks, with our deep guides where we have them:

How many subjects should you take?

Most IGCSE students take between five and nine subjects. Five to six is a complete, respectable certificate; seven is the classic balanced load (and the ICE award's number); eight or nine buys breadth at a real cost in depth. The honest trade-off: universities and sixth forms would rather see seven strong grades than ten scattered ones — a longer list stops impressing the moment it starts diluting. Where a government equivalency counts a fixed basket (Egypt and Kuwait count eight; the UAE counts five with exclusions), that number is your floor, chosen deliberately — not an accident discovered in Year 13.

1. Lock the spine first.
   English, Mathematics and at least one science appear in nearly every school's compulsory core — and nearly every university's assumptions. The spine isn't where choice lives; it's what makes the choices safe.
2. Choose for the 16–18 stage, not for Year 10.
   Future A Level sciences want the matching IGCSE sciences (and ideally Additional Maths for maths-heavy paths). Work backwards from the A Level list, not forwards from what sounds fun — our choosing guide walks the method.
3. Apply your country's counting rule.
   Jordan, the UAE, Saudi Arabia, Kuwait, Qatar and Egypt each count subjects differently — some exclude subjects, some set grade floors. Country-specific choices are covered in the Jordan, UAE and Pakistan guides.
4. Sanity-check the difficulty mix.
   A list of nine where four are notoriously demanding is a plan for burnout. Compare against the hardest IGCSE subjects and balance ambition across the two years.

Core vs Extended: the choice inside the choice

Picking a subject isn't the last decision — many Cambridge subjects then split into Core (grades C–G) and Extended (grades A*–E) tiers. The tier caps or unlocks your possible grades, so it deserves the same seriousness as the subject itself: an ambitious student sat on Core is capped at C; a struggling student pushed onto Extended risks falling off the bottom of the scale entirely. The mechanics — including what the tiers become on the newer 9–1 syllabuses — are in our IGCSE grading system guide.

FAQ

The subjects list looks like a menu, but it behaves like an architecture: a spine of English, Maths and science; two or three choices aimed at the post-16 stage; the country's counting rule applied on top; and a difficulty mix a real teenager can carry for two years. Build it in that order and the list defends itself in every interview, every equivalency office and every results morning. Build it by vibes, and Year 13 will send the invoice.