IGCSE vs GCSE: what's the difference?
TutorAura guide · Updated
GCSEs are the main qualifications taken at age 16 in England, Wales and Northern Ireland, regulated in England by Ofqual and graded 9 to 1 in England. IGCSEs (International GCSEs) are similar qualifications designed for international use, offered mainly by Cambridge International and Pearson Edexcel, and taken in schools around the world as well as some UK independent schools.
They cover similar content at a similar level, and Cambridge reports that UK NARIC and Ecctis found Cambridge IGCSE comparable to GCSE standards. The differences are mostly in who sets them, where they're taken, how they're graded and how they're assessed.
Key takeaways
- GCSEs are the UK national qualification; IGCSEs are international versions.
- GCSEs in England are graded 9 to 1; Cambridge IGCSE uses A* to G or 9 to 1.
- Both are widely recognised by sixth forms, colleges and universities.
- The best preparation is the same: practice questions, past papers and feedback.
Side by side
| GCSE | IGCSE | |
|---|---|---|
| Offered by | UK exam boards (AQA, Pearson Edexcel, OCR, WJEC Eduqas) | Mainly Cambridge International and Pearson Edexcel |
| Where taken | State and independent schools in the UK | Schools worldwide, plus some UK independent schools |
| Grading | 9 to 1 in England (9 highest) | Cambridge: A* to G, or 9 to 1 for some syllabuses; Pearson Edexcel International GCSE: 9 to 1 |
| Regulation | Ofqual in England | Set by the awarding organisation; international syllabuses aren't the same as Ofqual-regulated GCSEs |
| Subject choice | Wide | Wide: Cambridge offers over 70 subjects |
Each board's specifications differ, so compare the actual syllabus for your subject.
Grading
In England, GCSEs use a 9 to 1 scale. The Department for Education treats grade 4 as a "standard pass", and the bottom of grade 4 is aligned with the bottom of the old grade C; the bottom of grade 7 is aligned with the bottom of the old grade A (GOV.UK).
Cambridge IGCSE uses A to G* in most countries, with a 9 to 1 option for some syllabuses. Cambridge says the syllabus content and assessment are identical whichever grading scale a school chooses.
Assessment differences
Both are assessed mainly by written exams at the end of the course. Some IGCSE syllabuses have offered more flexibility, such as coursework options or a choice of papers, while reformed GCSEs in England are mostly exam-based. The details depend on the subject and board, so check the specification.
For maths, both include Foundation (Core) and Higher (Extended) tiers, with the higher tier needed for the top grades. GCSE Maths students in England are given a formulae sheet in exams through at least 2027; see GCSE Maths formulas.
Recognition
Both qualifications are widely accepted for progression to A levels, the IB Diploma and other post-16 courses, and by universities as evidence of attainment at 16. Requirements for specific courses (for example, a minimum grade in English and Maths) apply to both. If you're applying to a particular university or program, check its entry requirements directly.
Which is harder?
Neither is consistently harder. Content and difficulty vary by subject and board, and some topics appear in one specification but not another. What matters for your result is preparing well for your syllabus: know the specification, practise exam-style questions, and use past papers and mark schemes. See how to revise for GCSE Maths and how to use practice tests.
Preparing with TutorAura
TutorAura has exam prep pathways for selected GCSE Mathematics and IGCSE Mathematics topics, with an original question bank, a diagnostic, a study plan and timed mock papers with mark schemes. They're original materials, not official past papers, and we don't claim full syllabus coverage. See GCSE Maths and IGCSE Mathematics.
Frequently asked questions
Is IGCSE the same as GCSE?
They're similar qualifications at the same level. GCSEs are the UK national qualification; IGCSEs are international versions offered mainly by Cambridge International and Pearson Edexcel.
Do universities accept IGCSEs?
Yes, IGCSEs are widely accepted. Check specific course entry requirements directly.
How is the IGCSE graded?
Cambridge IGCSE uses A* to G, with a 9 to 1 option for some syllabuses. Pearson Edexcel International GCSEs use 9 to 1.
Is IGCSE harder than GCSE?
Not consistently. Difficulty depends on the subject and syllabus. Preparation matters more than the label.
Sources
- Cambridge IGCSE grading choice. Cambridge International.
- Cambridge IGCSE: A Guide to A–G and 9–1 Grades. Cambridge International.
- GCSE new grading scale: factsheets. GOV.UK.
- How does the 9-1 GCSE grading system work?. Department for Education.
Keep reading
GCSE Maths
Topic guides, practice questions, a diagnostic and timed mock papers.
IGCSE Mathematics
Topic guides, practice questions, a diagnostic and timed mock papers.
How to revise for GCSE Maths: a method that actually raises grades
Find weak topics, practise questions, use past papers well, and space and mix your revision.
GCSE Maths formulas: the formula sheet and what you still need to know
What the GCSE Maths formulae sheet includes, which formulas you still need, and how to use the sheet in the exam.