Overview
Choose your IGCSE subjects by covering the core everyone needs — English, Maths and at least one science — then adding options that keep your intended A-Level or IB pathway open, rather than picking whatever seems easiest. Most students take around eight to ten IGCSEs, and while these grades rarely appear directly in university offers, they gate which post-16 subjects you can take and form the foundation your A-Levels or IB build on. Getting the balance right in 2026 is about protecting future options, not maximising a headline count.
Start with the compulsory core
Almost every route expects a solid core, so lock these in first: First Language English, Mathematics, and at least one science. Many schools also require a second language and a humanities subject. These are the subjects that appear as GCSE/IGCSE requirements in A-Level entry and even some university offers — a good grade in English and Maths in particular is non-negotiable for most pathways. Build the rest of your timetable around this spine. For subject-by-subject demands, our [IGCSE past-paper guides](/blog/cambridge-igcse-past-papers-guide) show exactly how each is assessed.
| Category | Typical choices | Why it matters |
|---|---|---|
| Core (take these) | English, Maths, a science | Required for almost all post-16 routes |
| Sciences | Biology, Chemistry, Physics (or Combined) | Gate STEM A-Levels and medicine |
| Humanities | History, Geography | Support essay-based A-Levels |
| Languages | A second language | Valued for the IB and some universities |
| Options | Computer Science, Economics, Business, Arts | Explore interests, test A-Level fit |
How many should you take?
For Cambridge which Cambridge A-Level subjects, eight to ten IGCSEs is the common range, and quality beats quantity: a focused set of strong grades is worth more than a long list of average ones. Some ambitious students take more, but only if they can maintain high grades across all of them. If you are aiming for competitive courses like medicine, a strong profile of high grades (including the sciences and Maths) matters more than an unusually large number of subjects. Do not add subjects just to inflate the count — universities and sixth forms look at grades, not volume.
Keep your A-Level and IB pathways open
Your IGCSE choices quietly decide what you can study next. If there is any chance you will want STEM A-Levels or HL sciences in the IB, take the separate sciences (or a strong combined science) and keep Maths strong. If you lean humanities, ensure you have essay-based subjects like History to build writing skills. Because switching direction post-16 is harder than keeping options open now, the safest strategy at IGCSE is breadth across the core plus a couple of subjects that point toward your likely path. See [O-Level vs IGCSE](/blog/o-level-vs-igcse) if you are also choosing between qualification routes, and [which O-Level subjects to take](/blog/which-o-level-subjects-to-take-cambridge-2026) for the parallel decision.
Play to strengths — but test them honestly
Within the options, choose subjects you enjoy and perform well in, since motivation drives grades over two years. The most reliable way to test whether you actually suit a subject is to try its real papers and see how it is marked: [self-marking past papers instantly](/mark) shows where you gain and lose marks and whether a subject's assessment style fits you. That honest signal beats guessing from a syllabus overview or a friend's opinion. If you are unsure between broadly similar options, this is how to break the tie.
Frequently asked questions
This section covers Frequently asked questions — ranked by what Cambridge examiners return to most often in past papers.
How many IGCSEs do I need for university?
Universities look mainly at your post-16 qualifications (A-Levels or the IB), but they often expect a solid set of IGCSEs — commonly including good grades in English and Maths — as a foundation. Around eight to ten strong grades is a typical, competitive profile.
Which IGCSE subjects are compulsory?
This depends on your school, but English, Maths and at least one science are near-universal requirements, and many schools add a language and a humanities subject. Confirm your school's compulsory list, then choose your options around it.
Should I take triple science or combined science?
If you might pursue STEM A-Levels, HL IB sciences, or medicine, separate (triple) sciences are the safer choice because they keep those doors fully open. Combined science is fine for many paths but can be limiting for the most competitive STEM routes — check your intended A-Level requirements.
Do IGCSE grades matter for university?
They matter as a foundation and sometimes appear in entry requirements (especially English and Maths), but your A-Level or IB results carry far more weight in offers. Strong IGCSEs help; they rarely make or break an application on their own.