IGCSE vs GCSE: The Difference, Is IGCSE Harder, Grading, Universities + Comparison Sheet (PDF)

Article 253 · IGCSE

"IGCSE vs GCSE" is searched by families at international schools, by families moving to or from the UK, and by UK parents choosing between a state school that offers GCSE and an independent school that offers IGCSE. Most answers online say either "they are the same" or "IGCSE is harder", and both are half true. This page sets out the real differences (who sets them, where, grading, coursework, tiers, sessions, content by subject), gives an honest answer on difficulty, says what universities think, and ends with who should take which. There is a printable comparison sheet. For what IGCSE is from the beginning, see what is IGCSE.

Download the IGCSE vs GCSE comparison sheet (PDF) (the two side by side on one page, the grade equivalents, the subject-by-subject differences, and the questions to ask a school; two pages, free).

The two side by side

	GCSE	IGCSE
Set by	AQA, Pearson Edexcel, OCR, WJEC Eduqas; regulated by Ofqual	Cambridge International (CAIE) and Pearson Edexcel International; not Ofqual-regulated
Taken in	England, Wales, Northern Ireland; state and independent schools	About 150 countries' international schools; many UK independent schools; some UK private candidates
Grading	9 to 1 (9 highest; 4 standard pass, 5 strong pass)	Edexcel: 9 to 1. Cambridge: A* to G, or 9 to 1 on the 0980-series codes
Tiers	Foundation (grades 5 to 1) and Higher (9 to 4) in maths, sciences and languages	Cambridge: Core (C to G) and Extended (A* to E) in maths and some sciences. Edexcel: Foundation and Higher in maths
Coursework	Almost none since 2017 (art, design and technology, some practical endorsements)	Almost none; Cambridge offers coursework options in English and a few subjects, which most schools do not use
Exam sessions	May and June only (November resits in English and maths)	May to June and October to November; Edexcel also January in some countries
Science practicals	Required practicals assessed in the written papers; a practical endorsement at A-level only	The same: practical skills assessed in written papers (Cambridge has a practical paper or an alternative-to-practical paper)
Who recognises it	Universities worldwide; UK school performance tables	Universities worldwide; equivalent to GCSE for UK universities and independent schools; not counted in English state school tables
Typical age	16, after two years (Years 10 and 11)	16, after two years; some international schools run three

The content differences, subject by subject

Most subjects overlap by 80 to 90 percent. The differences that matter:

Subject	Where IGCSE differs from GCSE
Mathematics	Cambridge Extended goes further than GCSE Higher: sets and set notation, functions and composite and inverse functions, more vectors and matrices (in 0606 Additional Maths), and a non-calculator paper from 2025. Edexcel IGCSE Higher is the closest to GCSE Higher and adds calculus-free topics such as differentiation of polynomials (yes, 4MA1 includes basic differentiation). GCSE has more statistics and problem-solving in context. The formula sheets differ; see the IGCSE maths formula sheet
Sciences	Close in content; IGCSE has slightly less contextual, more direct questions, and Cambridge's practical paper tests technique. GCSE Combined Science is two grades; the IGCSE equivalent is Double Award Science
English Language	IGCSE texts are chosen for an international readership, the tasks are more predictable (summary, directed writing, composition), and some options include coursework or a spoken component. GCSE English Language is unseen 19th-century texts and comparison, which is why many UK independent schools prefer IGCSE here
English Literature	Both are set texts and poetry; the lists differ. IGCSE allows open-book papers in some options
History and Geography	Different set topics and case studies; IGCSE's are international, GCSE's often British
Languages	IGCSE has a stronger reading and writing emphasis; GCSE a larger speaking component

Is IGCSE harder than GCSE?

The honest answer is "comparable, and it depends which paper". Three things are true at once:

The top of IGCSE maths is harder than the top of GCSE maths. Cambridge Extended and Edexcel Higher ask for more algebra and function work, and the grade 9 and A* boundaries sit at a high mark. A pupil who finds GCSE Higher comfortable will find IGCSE Extended demanding in the last term.
IGCSE English Language is generally easier to score well in, because the tasks are predictable and the texts are modern. This is the subject where UK independent schools most often choose IGCSE.
The sciences are close, with IGCSE questions slightly more direct and GCSE questions more wrapped in context.

The reputation for difficulty comes from two places: before 2017, IGCSE was seen as more rigorous than the old modular GCSEs, which is why independent schools adopted it; and the grade distributions differ because the cohorts differ (international schools and independent schools score higher on both). Neither is about the papers themselves. Ofqual, UCAS and UK universities treat the two as equivalent, and the grade boundaries show the same shape: the Edexcel IGCSE grade boundaries for June 2025 put a 4 in Mathematics A Higher at 44 of 200 and a 9 at 172, which is the shape of a GCSE Higher paper.

What universities and sixth forms think

Every UK university accepts IGCSE as equivalent to GCSE, including for the English and mathematics grade 4 (or C) that most courses and many employers require, and for medicine and other courses that look at GCSE profiles. Sixth forms, state and independent, accept either for entry. Overseas, IGCSE is better known than GCSE: universities in the US, Canada, Australia, India and the Gulf recognise IGCSE directly as a secondary-school qualification, and some Indian boards and universities require it to be listed as equivalent to Class 10, which it is.

The one place IGCSE is not counted is the English state school performance tables, which is why state schools stopped offering it after 2017. That decision was about tables, not pupils.

Who should take which

A child at an international school: IGCSE, which the school will offer; the choice is usually Cambridge or Edexcel, which the school makes.
A child moving to the UK before Year 10: GCSE at a state school, IGCSE or GCSE at an independent one. Nothing is lost either way.
A child moving to the UK in Year 11: finish the IGCSE course if the new school offers it or if the child can sit as a private candidate; switching boards in the last year costs a grade.
A child moving abroad from the UK mid-course: Edexcel IGCSE is closest to GCSE, so the switch is smallest; Cambridge Extended maths needs the sets and functions topics taught.
A homeschooled or private candidate: IGCSE is easier to enter privately (no coursework or practical endorsement, more sessions) and is why most UK home educators choose it.

Where to get help

A 1-on-1 online class for IGCSE maths, the sciences and English with tutors who teach both boards: the syllabus taught in the board's order, the mark scheme used from the first term, and, for a child switching between GCSE and IGCSE, the missing topics taught in a term. UK after-school and Gulf and Asian evening hours, every class recorded, £8 to £10 an hour. The free 30-minute first class is a real lesson on the topic the child is on. IGCSE tutor online explains the subject-by-subject format.

Download the IGCSE vs GCSE comparison sheet (PDF)

Questions parents ask

1What is the difference between IGCSE and GCSE?

GCSE is the qualification taken in English, Welsh and Northern Irish state schools at 16, set by AQA, Edexcel, OCR and WJEC and regulated by Ofqual. IGCSE is the international version, set by Cambridge International and Pearson Edexcel, taken in about 150 countries and in many UK independent schools. The content overlaps by about 80 to 90 percent in most subjects; the differences are in assessment (IGCSE has almost no coursework, more exam sessions, and in Cambridge's case a Core and Extended tier), and in a few topics.

2Is IGCSE harder than GCSE?

Comparable overall, and it depends on the subject. In mathematics the Extended and Higher IGCSE papers reach further than GCSE Higher (calculus-free, but with more algebra, functions and sets in Cambridge's case), so the top of IGCSE maths is harder. In English Language, IGCSE is generally seen as easier because its texts and tasks are more predictable and some options include coursework. In the sciences the two are close. Ofqual and UK universities treat them as equivalent.

3Do UK universities accept IGCSE?

Yes, every UK university accepts IGCSEs as equivalent to GCSEs, including for the grade 4 or C in English and maths that most courses require; the Department for Education treats them as equivalent for independent schools, which is why Eton, Harrow and most leading independent schools enter pupils for IGCSE in several subjects. State schools in England cannot count IGCSEs in their performance tables, which is why state schools stopped offering them after 2017; it says nothing about their value to a pupil.

4Is IGCSE graded 9 to 1 or A* to G?

Pearson Edexcel IGCSEs are graded 9 to 1, like GCSEs. Cambridge IGCSEs are graded A* to G, with a 9 to 1 option (the 0980-series codes, for example 0980 Mathematics) that some UK schools use. Grade 9 is above A*; grade 7 is roughly an A, 4 roughly a C.

5Which should a child abroad take, IGCSE or GCSE?

Almost always IGCSE, because it is designed for international schools: exam sessions in May to June and October to November (and January for Edexcel in some countries), content that does not assume a British context, and marking that recognises different conventions. A child moving to a UK state school before Year 10 will do GCSEs; a child moving to the UK in Year 11, or to an independent school, can usually finish the IGCSE course.

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written by

Shobha

Founder and lead tutor, Science with Shobha

Teaching maths, science and English to children online since 2018. 500+ students, 20+ tutors, families in nine countries.

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