What Is the IGCSE? Meaning, Boards and Grades

IGCSE stands for International General Certificate of Secondary Education. It is a subject-by-subject qualification that students usually study over two years, between the ages of 14 and 16, and it is the international counterpart of the GCSE taken in England. It is offered by Cambridge, whose Cambridge IGCSE is graded A* to G in most of the world, and by Pearson Edexcel, whose International GCSE is graded 9 to 1.

That answer is accurate, but it leaves out what matters most to a student sitting the exams: which board your school uses, which tier you are entered for and which grade scale will appear on your results. This guide takes each in turn, with links to the official pages so you can check your own syllabus.

What IGCSE stands for, letter by letter

The I is for International. The syllabuses are written for an international audience rather than for a UK national curriculum; Pearson, for instance, describes its International GCSE content and assessment as designed specifically for international learners. GCSE is the General Certificate of Secondary Education, the two-year, single-subject qualification that students in England, Wales and Northern Ireland take at around 14 to 16.

Cambridge spells the full form out in its own syllabus documents: the Cambridge IGCSE Biology 0610 syllabus, for example, defines Cambridge IGCSE as Cambridge International General Certificate of Secondary Education. Pearson names its version the International GCSE rather than the IGCSE, but it sits at the same level. And if you have seen the word written as IGSCE or IGCES, those are simply misspellings: the letters are I-G-C-S-E.

Who sets the IGCSE: Cambridge and Pearson Edexcel

The IGCSE is not a single exam set by a single organisation. Cambridge and Pearson Edexcel each set their own version, and a student taking IGCSE Biology with one of them sits different papers, possibly on a different grade scale, from a student taking it with the other.

Cambridge IGCSE

Cambridge International Education, part of the University of Cambridge, first examined the IGCSE in 1988 and describes it as the world's most popular international qualification for 14 to 16 year olds. Schools choose from more than 70 subjects in any combination. Assessment takes place at the end of the course and, depending on the subject, includes written papers, oral exams, coursework and practical work. Cambridge aligns the standard of its IGCSE with the GCSE in England, and an independent benchmarking study by UK NARIC, published in 2019, concluded that the Cambridge IGCSE can be considered of a comparable level to the GCSE. Cambridge's official Cambridge IGCSE page lists the current syllabuses.

Pearson Edexcel International GCSE

Pearson's version is the Pearson Edexcel International GCSE (9–1). According to Pearson's overview of International GCSEs, it is available in 37 subjects, studied in over 80 countries, aimed at learners aged 14 to 16 and equivalent, grade for grade, to UK GCSEs. Exams are offered in a May–June series and a November series, although not every subject is available in both. For many subjects, schools outside the UK can choose between a linear route, with every exam at the end of two years, and a modular route, with an exam at the end of each unit.

The two boards side by side

The syllabus code is the quickest way to tell which one you are taking. It is printed on past papers and on your school's exam entries, and everything below, from grades to tiers to papers, follows from it.

How IGCSE grades work

Cambridge: A* to G, with a 9–1 option in some places

Cambridge IGCSEs are graded from A*, the highest, down to G around the world; work below grade G is ungraded (U). Cambridge has also produced 9–1 graded versions of many syllabuses, each with its own code: Biology (9–1) is 0970, alongside the A*–G Biology 0610. Those versions are offered only to schools in one of Cambridge's administrative zones, and any school can keep A*–G grading. The scale is fixed when the school makes its entries, and once the entries deadline has passed a candidate cannot be moved from one scale to the other.

Pearson Edexcel: 9 to 1

Pearson grades its International GCSEs from 9, the highest, down to 1, the same nine-point scale used for GCSEs in England. Pearson's guide to the 9–1 grading scale explains how it lines up with the letters:

• Grade 9 is a new level of attainment, introduced to tell the very top performers apart.
• The bottom of grade 7 broadly aligns with the bottom of grade A.
• The bottom of grade 4 broadly aligns with the bottom of grade C.
• The bottom of grade 1 broadly aligns with the bottom of grade G.

So a 7 is roughly where an A used to begin, and a 4 roughly where a C used to begin. The middle of the scale is finer than before: three grades, 6, 5 and 4, cover the ground that B and C used to share. Entry requirements are set by schools and universities, not by the boards, so always check the exact grade each one asks for.

Grade boundaries move

Neither scale is a fixed percentage. Cambridge sets its grade boundaries after marking, using a mixture of statistical evidence and expert judgement, so that a student does not receive a lower grade simply because their paper was slightly harder than the year before. The raw mark needed for a grade therefore changes from series to series, which is why a past paper is best marked against the boundaries published for that series.

Core and Extended, Foundation and Higher: why tiers matter

In many IGCSE subjects the papers come in two versions, and the version you are entered for limits the grades you can be awarded.

Cambridge: Core and Extended. In Cambridge IGCSE Biology 0610, candidates who have studied only the Core content, or who are expected to achieve grade D or below, take the Core papers and are eligible for grades C to G. Candidates who have studied the Extended content, which is the Core plus the Supplement, take the Extended papers and are eligible for grades A* to G. A Core candidate therefore cannot be awarded higher than a C, however well they do on the day.

Pearson Edexcel: Foundation and Higher. In Pearson Edexcel International GCSE Mathematics A (4MA1), the Foundation tier offers grades 5 to 1 and the Higher tier offers grades 9 to 4, with a grade 3 allowed for a Higher candidate who narrowly misses a 4. Not every subject is tiered, so check your own specification.

Schools make the tier decision from how they expect a student to perform, as the Biology wording shows. If you are aiming for a grade the lower tier cannot award, raise it with your teachers well before the entries deadline, not after results day.

How the IGCSE is assessed

Written exams carry most IGCSE subjects, but the papers differ by subject and tier. Cambridge IGCSE Biology 0610 shows a typical science pattern: every candidate takes three components, a multiple-choice paper and a theory paper at their tier, plus either a Practical Test or a written Alternative to Practical paper. The syllabus is examined in the June and November series. The format is changing too: Pearson has introduced onscreen exams alongside paper ones, and Cambridge has digital IGCSE exams in development, available to early adopters from 2026.

IGCSE, GCSE and O Level: how they relate

• GCSE is the national qualification at this level in England, Wales and Northern Ireland.
• IGCSE and International GCSE are the international versions. Pearson states that its International GCSEs are equivalent, grade for grade, to UK GCSEs; for the Cambridge IGCSE, the 2019 UK NARIC study found it comparable in level to the GCSE.
• Cambridge O Level is a separate Cambridge qualification at the same level, and Cambridge says the IGCSE and O Level are equivalent grade for grade. O Level is not offered everywhere, and from June 2028 Cambridge will begin moving schools in two of its administrative zones from O Level to the equivalent IGCSEs.

For a student, the real differences are content and assessment rather than level. The NARIC study gives a clear example: GCSE History specifications in England must devote 40% of assessed content to British history, while in the Cambridge IGCSE British history is optional, one of several country options a school can choose.

What comes after the IGCSE

After the IGCSE, the next stage is typically a two-year pre-university programme, and the subjects and grades you reach at IGCSE shape which courses are open to you.

• A Levels. Cambridge International AS and A Levels, Pearson Edexcel International A Levels, or UK A levels from AQA, OCR and Pearson. Cambridge notes, for instance, that IGCSE Biology candidates who achieve grades A* to C are well prepared for its AS and A Level Biology. Our A Level tutoring page sets out how the four boards differ in structure, exam series and practical work.
• The IB Diploma. If you are weighing it against A Levels, our IB Diploma and A Level comparison sets the two routes side by side.

Universities look at IGCSE results as well. Cambridge says IGCSEs are accepted and valued by leading universities and employers around the world as evidence of academic achievement, and that many universities require a combination of A Level and IGCSE results, or equivalents, to meet their entry requirements. Check each university's published requirements for your year of entry.

Practical points for students in Africa

Because international and British-curriculum schools use both boards, two friends who are both doing IGCSE Maths may be preparing for quite different papers. Four habits keep you on the right track.

1. Find your syllabus code. It tells you the board, the subject and the grade scale. Cambridge codes are four digits, such as 0610; Pearson International GCSE codes look like 4MA1.
2. Check your tier early. If your school is considering the Core or Foundation tier for you, ask what work would change that decision before entries close.
3. Practise with your own board's past papers and mark schemes. Papers, command words and mark allocations differ between boards, so practising the other board's papers means practising for a different exam.
4. Plan the next step from the start. If you intend to take a subject further at A Level, aim for the tier and grade that course expects.

If you would like support in a particular subject, our IGCSE tutoring page explains how lessons follow the Cambridge or Pearson Edexcel structure on your timetable, tier by tier, in live online lessons taught in English.

Frequently asked questions