IGCSE or O Level: which should my child take?

Parents in Pakistan, the Gulf and much of Asia and Africa are often asked to choose between Cambridge IGCSE and Cambridge O Level, sometimes subject by subject. The short answer is that they are qualifications at the same level, for the same age group (typically 14 to 16), from the same exam board, and either one is a normal route into AS and A Level. The useful question is not “which is better” but “which version of each subject suits this student”.

What is the same

• Level and purpose. Both are taken at the end of the two years before AS and A Level, and both are accepted for A Level entry. Schools and universities that ask for “IGCSE or equivalent” mean O Level as well.
• Board. Both are set and marked by Cambridge International. Subject content often overlaps closely: O Level Chemistry 5070 and IGCSE Chemistry 0620 cover much of the same chemistry.
• Exam series. Most syllabuses of both are examined in June and November; each syllabus page on this site states its own series.

Difference 1: tiers

This is the difference that most affects a student’s result.

Many IGCSE subjects are tiered. IGCSE Chemistry 0620, for example, has a Core tier and an Extended tier: Extended covers the Core content plus supplement material. The tier is chosen when the student is entered, and it caps the grades available. Core leads to grades C to G; Extended leads to grades A* to E. A student entered for Core cannot get an A, however well they do.

O Level subjects are generally not tiered: O Level Chemistry 5070, for example, has one set of content for every candidate.

What this means in practice:

• A strong student taking IGCSE should be entered for Extended. If a school suggests Core, ask why, because the decision limits the grade.
• A student who is unsure of a subject can, in a tiered IGCSE, be entered for Core and still get a grade, where an untiered paper would test everything.

Difference 2: grades

Cambridge IGCSE is graded A* to G. Cambridge O Level is graded A* to E. Some IGCSE syllabuses also come in a 9 to 1 graded version, mainly used by schools that follow the English grading scale; check which version a school enters before comparing results.

Difference 3: subjects

Most core subjects exist in both: Mathematics, the sciences, English, Computer Science, Economics, Business and Accounting. Some subjects matter more in one country than another:

• Pakistan. Islamiyat, Pakistan Studies and Urdu are usually taken at O Level (Islamiyat 2058, Pakistan Studies 2059, Urdu 3247 and 3248). IGCSE versions also exist.
• The Gulf. Many British-curriculum schools in the UAE and Qatar teach IGCSE, often with Pearson Edexcel International GCSE alongside Cambridge. O Level is less common there.

Mixing is normal. A student can take some subjects at O Level and others at IGCSE in the same series, provided the school or exam centre offers them.

How to choose

1. Start with what the school offers. Most families choose a school, not a qualification; the school’s choice usually decides it.
2. For each tiered IGCSE subject, settle the tier early. Ask at the start of the course, not in the term before entries close.
3. Look two years ahead. A student heading for A Level sciences or Mathematics needs the full content: Extended at IGCSE, or O Level.
4. Use the syllabus, not the name. Each course page on this site lists every topic, how the papers are weighted and the official syllabus link. The printable checklists show the whole course on one page.

If your child needs help

Marlbridge teaches both Cambridge O Level and Cambridge IGCSE live online, and in person at our Lahore academy, with a free first class. Families in Pakistan, the UAE and Qatar can see fees and class times for their country.