IGCSE Grades Explained: Grading System, Pass Marks 2026

Navigating the IGCSE grading system can be a daunting task for students and parents alike. The International General Certificate of Secondary Education (IGCSE) uses a grading scale from A* to G, with A* being the highest grade and G the lowest.

Each grade reflects a student’s performance, knowledge, and skills in a specific subject area. Understanding these grades is crucial for setting realistic academic goals and planning future educational pathways.

At Ignite Training Institute, we specialize in providing comprehensive tutoring support for the IGCSE curriculum. Our experienced IGCSE tutors are dedicated to helping students achieve their academic potential by offering personalized lessons and targeted exam preparation strategies.

What Is The IGCSE Grading System?

The IGCSE grading system is the framework used to assess student performance in International General Certificate of Secondary Education exams. Two scales are in active use: the traditional A*-G scale (where A* is the highest and G is the lowest classified grade) and the 9-1 numerical scale (where 9 is the highest and 1 is the lowest, with 4 as the standard pass). Cambridge IGCSE primarily uses A*-G; Pearson Edexcel International GCSE uses 9-1. U means ungraded on both scales.

The Two Scales: A*-G And 9-1 (And Why Both Still Exist In 2026)

The A*-G scale has been used by Cambridge IGCSE for nearly 30 years. It runs A*, A, B, C, D, E, F, G, with U for ungraded, eight classified grades plus ungraded.

The 9-1 scale was introduced when England reformed its domestic GCSE system from 2017. Pearson Edexcel adopted 9-1 for its International GCSE, and Cambridge offers 9-1 in some regions for select subjects. The 9-1 scale runs 9 (highest), 8, 7, 6, 5, 4, 3, 2, 1, with U for ungraded, nine classified grades.

The two scales don’t line up perfectly. A grade 9 sits higher than A* (it was designed to distinguish exceptional performance from strong performance). Grade 8 falls in the A*/A region. Grade 4 is the standard pass and roughly equivalent to a low C. Grade 7 maps roughly to an A.

Both scales remain valid because exam boards moved at different speeds and schools in different countries chose different boards. Universities accept both equally.

Know More About: Pearson Edexcel IGCSE: Subjects, Grades, & Popular Facts 

IGCSE Grading System By Board: Cambridge, Edexcel & Oxford AQA

Three exam boards award most IGCSEs, and the grading system for IGCSE depends on which one your school uses. Cambridge and Pearson Edexcel are the two dominant boards, with Oxford AQA a smaller third option. All three are recognised by universities on a grade-for-grade basis, so no board is “worth more” than another. Here is how each one grades.

Cambridge IGCSE

Cambridge IGCSE primarily uses the A*-G scale, where A* is the highest and G the lowest classified grade. Cambridge also offers the 9-1 scale on selected subjects in certain regions, and it runs these as separate syllabus versions with their own codes. Accounting, for example, is coded 0452 on A*-G and 0985 on 9-1. A grade C, or 4 on the 9-1 version, is the standard pass. (Cambridge O Level, a separate qualification, uses A*-E.)

Official grade boundaries 2026 for Cambridge IGCSE

Pearson Edexcel International GCSE

Pearson Edexcel uses the 9-1 scale across its International GCSEs, where 9 is the highest and 1 the lowest. Grade 4 is a standard pass and grade 5 a strong pass, and many universities set their English and Maths requirement at grade 5.

Official grade boundaries 2026 for Pearson Edexcel International GCSE

Oxford AQA International GCSE

Oxford AQA also uses the 9-1 scale, with grade 4 as a standard pass and grade 5 a strong pass. Combined Science is reported as a double grade, for example 9-9 down to 1-1.

Official grade boundaries 2026 for Oxford AQA International GCSE

Exam Board	Grading Scale	Standard Pass
Cambridge IGCSE	A* to G (9-1 on some subjects and regions)	C (or 4 on 9-1)
Pearson Edexcel International GCSE	9-1	4 (5 is a strong pass)
Oxford AQA International GCSE	9-1	4 (5 is a strong pass)

If your child sits Cambridge Maths but Edexcel English, one certificate line may show an A*-G grade and another a 9-1 grade. Both are valid, both are accepted by universities, and each should be read on its own scale.

Know More About: Pearson Edexcel IGCSE Explained: Subjects & Grading

How IGCSE Grades Are Calculated (Marks To Grade)

Grades aren’t awarded on a simple percentage. Each subject runs through a three-step process: raw marks are weighted across papers, then compared against grade boundaries set for that specific session, and then a final grade is issued.

Raw Marks, Weighted Marks, And Grade Boundaries

Most IGCSE subjects are assessed across multiple papers (Paper 1, Paper 2, sometimes a practical or coursework component). Each component contributes a fixed percentage to the final grade, for example, Paper 1 might be 40%, Paper 2 might be 40%, and a practical might be 20%.

Your raw marks on each paper are converted to a weighted total. That weighted total is then compared against the grade boundaries set for that specific subject and exam session. Grade boundaries are the minimum total marks needed to achieve each grade. They are set after the exams have been sat, based on how the cohort performed and how difficult the paper was relative to past sessions.

What Is The Uniform Mark Scale (UMS)?

Some IGCSE subjects use a Uniform Mark Scale to standardise marks across different paper variants and sessions. Raw marks are converted to a uniform scale so that performance can be compared fairly across years even when paper difficulty differs.

UMS appears as a “Percentage Uniform Mark” on your statement of results, it tells you whether you sat in the middle of your grade band, near the top, or near the bottom. It doesn’t change your final grade; it gives you context on how comfortably (or narrowly) you achieved it.

Worked Example: Turning Your Paper Scores Into A Final Grade

Suppose you sit a Cambridge IGCSE subject with three papers, weighted as follows: Paper 1 (40%), Paper 2 (40%), and Practical (20%). Your raw scores are:

• Paper 1: 32 out of 40 = 80%
• Paper 2: 66 out of 80 = 82.5%
• Practical: 11 out of 20 = 55%

Your weighted total is: (80 × 0.40) + (82.5 × 0.40) + (55 × 0.20) = 32 + 33 + 11 = 76%

If the grade boundary for an A in that subject and session is set at 73%, you get an A. If it’s set at 78% (because the paper was easier and the cohort scored higher), you get a B. The same 76% can earn different grades in different sessions.

Know More About: 10 Proven Strategies On How To Study For IGCSE Exams & Excel 

IGCSE Grade Boundaries Explained (With Real 2026 Data)

Grade boundaries are the minimum total marks you need to achieve each grade. They are not fixed, and they are not the same across subjects or exam series.

Why Do Boundaries Change Every Session?

Cambridge International and Pearson Edexcel set grade boundaries after each exam session, based on:

• The difficulty of that specific paper (harder papers pull boundaries down)
• How the cohort performed overall
• Statistical comparison with previous sessions to keep standards consistent
• Senior examiner judgment on whether boundaries fairly reflect the standard

This is why a friend who sat IGCSE Maths in 2024 might say “you need 70% for an A,” but in 2026 the boundary for the same grade could sit higher or lower. Cambridge publishes official grade threshold tables for every session. Always check the table for your subject and your session, not last year’s.

Real Grade Boundaries From June 2026 (Cambridge IGCSE Biology 0610)

Here is what real boundaries look like. These are the official syllabus grade thresholds Cambridge published for IGCSE Biology (0610) in the June 2026 series, shown for two common component routes, each out of a maximum weighted mark of 200. Percentages are worked out from those marks to show what each grade actually required.

Route	Grade	Mark (out of 200)	Approx %
Extended	A*	165	82.5%
Extended	A	137	68.5%
Extended	B	109	54.5%
Extended	C	82	41.0%
Extended	D	72	36.0%
Core	C	111	55.5%
Core	D	95	47.5%
Core	E	80	40.0%

Two things jump out. First, an A* in this paper needed 82.5%, not the “90% for an A*” many people assume, and a C needed only 41%. Second, the Core route has no A*, A, or B at all, which is the tier ceiling in action (more on that below). Different component combinations carry slightly different thresholds, so always read the exact route your child sat.

Core VS Extended Tier: How Boundaries Differ

Cambridge IGCSE offers many subjects at two tiers:

• Core curriculum: Targets grades C to G. Lower-difficulty content. The highest grade achievable is C.
• Extended curriculum: Aimed at the top grades, A* to E, with F and G still available as a safety net. Higher-difficulty content, with access to the full grade range up to A*.

Edexcel uses Foundation and Higher tiers in a similar way. Grade boundaries are set separately for each tier. You can see this in the Biology 0610 data above: on the Core route a C needed 111 marks, while on the Extended route a C needed only 82, because the Extended paper is harder and spreads scores differently. Students should be entered for the tier that matches their realistic target grade. Sitting Extended when you are aiming for a D often produces a worse result than sitting Core and securing a comfortable C.

For a closer look at how subject choice affects your grade ceiling, see our guide on Cambridge IGCSE Biology and other science syllabi.

Know More About: IGCSE Subjects: Full List & How To Choose Them?

IGCSE Grades To Percentage: Conversion Chart And What It Actually Means

This is the section most students search for. Here are the approximate ranges, with the honest caveat: these are estimates based on historical boundaries, not fixed rules.

A*- G To Percentage (Approximate Ranges)

Grade	Approximate Percentage
A*	90% and above
A	80 – 89%
B	70 – 79%
C	60 – 69%
D	50 – 59%
E	40 – 49%
F	30 – 39%
G	20 – 29%
U (Ungraded)	Below 20%

9-1 To Percentage (Approximate Ranges)

Grade	Approximate Percentage
9	88% and above
8	80 – 87%
7	70 – 79%
6	60 – 69%
5	53 – 59%
4	45 – 52%
3	35 – 44%
2	25 – 34%
1	15 – 24%
U (Ungraded)	Below 15%

A*- G To 9 – 1 Cross-Reference

A* – G	9 – 1
A* (Top End)	9
A*	8
A	7
B	6
Low B / High C	5
C	4
D	3
E	2
F / G	1

Why “70% Always Equals A B” Is A Myth

Three reasons the percentage tables above are guides, not rules:

First, boundaries shift each session. A 70% in June 2024 might have been a B; the same 70% in June 2025 might be a low A or a high C, depending on how the cohort performed.

Second, subjects don’t share the same boundary patterns. The English Language tends to have higher boundaries because it’s marked holistically. Maths and Physics often have lower boundaries because the questions stretch and the Extended papers spread scores out. Comparing percentages across subjects is rarely accurate.

Third, the published “raw” percentage you see on a mock isn’t always the percentage that goes into the calculation. Some subjects use Uniform Mark Scale conversions; some adjust for paper variant difficulty. School mock results approximate, but they’re not the actual algorithm.

The right way to use these tables: use them to estimate where you’re sitting, not to predict what grade you’ll get.

Know More About: Old & New GCSE Grading System: All You Need To Know 

What Is The IGCSE Passing Grade?

The IGCSE passing grade is C on the A*-G scale, or 4 on the 9-1 scale. Both are considered a “standard pass” and the minimum requirement for most A-Level entry, sixth form admissions, and university applications. 

Grades D and below (or 3 and below on the 9-1 scale) are still classified grades that appear on certificates, but they don’t meet the threshold most institutions require for further study in that subject.

Why C (Or 4) Is The Real Threshold That Matters

Almost every Sixth Form, college, and university uses C/4 as the cutoff. Some competitive universities (Russell Group, Ivy League, Oxbridge) want B/6 or higher in core subjects like Maths and English, even alongside excellent A-Level grades. Medical and engineering courses often want A/7 or above in Sciences and Maths.

If you scored below C/4 in English Language or Maths, you’ll usually need to retake those subjects to meet baseline university entry requirements, regardless of how well you did elsewhere. For comparison between curricula, see our guide on the difference between IGCSE and CBSE.

Is D A Pass In IGCSE?

Yes, technically, D is a classified, recognised grade on the IGCSE A*-G scale, not an ungraded result. It will appear on your certificate. However, D is below the standard pass threshold (C) that most schools, A-Level programmes, and universities require. 

So while D is “a pass” in the sense that you achieved a recognised grade, it usually isn’t enough on its own to progress to A-Level study in that subject or to meet university entry requirements. For core subjects like English and Maths, a D often means a retake will be needed.

What Happens If You Get A U?

U stands for “ungraded” and means you didn’t reach the minimum standard required for the lowest classified grade (G on the A*-G scale, or 1 on the 9-1 scale). The IGCSE qualification is not awarded for that subject. Your statement of results will show U, and your certificate will not list the subject at all.

A U is not the end of the road, students can retake IGCSE exams in later sessions (January and June) with no limit on attempts. Only the best grade is typically reported.

Know More About: What To Do If You Fail GCSEs? Explore Your Options 

IGCSE Grades & University Admissions (UK, US, And UAE)

Grades carry different weight depending on where you apply. Here’s what universities actually look at.

UK University Requirements (Russell Group, Oxbridge)

UK universities consider IGCSE grades alongside A-Level grades through UCAS. Most courses set minimum IGCSE grades for English Language and Maths (typically C/4 or above), regardless of your A-Level subject choices.

For competitive courses like Medicine, Law, Engineering, and Oxbridge applications, expectations rise significantly. Medicine typically requires A/7 or above in Maths, English, and the Sciences at IGCSE. Oxbridge applications often look for predominantly A*/9 or A/7-8 grades across the board, even though A-Levels carry more direct weight in the offer.

US University Requirements (And SAT/ACT Pairing)

US universities accept IGCSE grades and often grant transfer credit for grades A or B in select subjects. However, IGCSE grades alone aren’t sufficient for US admissions, you’ll also need SAT or ACT scores, application essays, and high school transcripts.

For Ivy League and other selective US universities, IGCSE grades are read as part of your overall academic profile. A consistent record of A and A* grades signals academic strength; a single weaker grade in a non-core subject usually doesn’t damage an application if the rest of the profile is strong.

UAE University Requirements (NYU Abu Dhabi, AUS, Heriot-Watt, Middlesex Dubai)

For students staying in the UAE, the major universities accept IGCSE qualifications:

• NYU Abu Dhabi: Highly selective; expects strong IGCSE grades (mostly A*/A or 7-9) alongside A-Level or IB results, plus SAT/ACT.
• American University of Sharjah (AUS): Accepts IGCSE alongside high school completion and SAT/ACT for US-style admissions, or A-Levels for British-pathway entry. Minimum grades vary by programme.
• Heriot-Watt University Dubai: Follows UK-style entry; expects minimum C/4 in English and Maths at IGCSE alongside A-Level conditional offers.
• Middlesex University Dubai: Accepts IGCSE as part of a broader portfolio; minimum C/4 in core subjects, with A-Level or equivalent for direct degree entry.
• University of Birmingham Dubai, University of Wollongong Dubai, and Murdoch Dubai: All operate on UK/Australian entry standards, with IGCSE C/4 minimum in English and Maths.

For families staying in the UAE for higher education, IGCSE grades are usually read alongside A-Level or IB results. They provide the baseline, and the post-16 qualification carries the bulk of the offer decision.

Know More About: Top Universities That Accept IGCSE Certificate In USA & UK 

Ignite’s IGCSE Tutors In Dubai Helping Students Hit Their Target Grades

Ignite Training Institute supports IGCSE students across Dubai with one-to-one and small-group tutoring tailored to the specific exam board (Cambridge, Edexcel, or OxfordAQA) and subject your child is sitting. Our tutors work backwards from the grade boundary your child needs to hit, then build a study plan around past papers, mark scheme analysis, and the topics that consistently separate B-grade work from A-grade work.

One parent shared that her daughter studied with best IGCSE tutors In Dubai at Ignite for around three years across IGCSE and IB, achieving strong predicted and final grades that secured university offers from UCL and the University of Edinburgh. 

If your child is targeting specific IGCSE grades, our subject specialists across Maths, Physics, Chemistry, Biology, English, etc work with students at every level, from those rebuilding fundamentals to those pushing from A to A*. 

FAQs

1. What is the highest grade in IGCSE?

The highest grade is A* on the A*-G scale and 9 on the 9-1 scale. Grade 9 was specifically designed to sit above the old A*, distinguishing exceptional performance from strong performance. On the A*-G scale, A* itself is the ceiling.

2. Is a 6 the same as a B in IGCSE?

Roughly, yes. A grade 6 on the 9-1 scale is broadly equivalent to a B on the A*-G scale, though the two systems don’t map perfectly because the 9-1 scale has nine classified grades while A*-G has eight. Universities and Sixth Forms treat 6 and B as essentially interchangeable for entry requirements.

3. Can I retake an IGCSE exam to improve my grade?

Yes. You can retake IGCSE exams in subsequent sessions (typically June and November for Cambridge, January and May/June for Edexcel). There is no limit on the number of retake attempts, and only the best grade is typically reported on your final certificate. Retaking is common for students who narrowly missed a target grade in a core subject like Maths or English Language.

4. How long does it take to get IGCSE results?

Cambridge IGCSE results are released in August for the May/June session and January for the October/November session. Edexcel International GCSE results follow a similar pattern: August for May/June and March for January. Schools usually receive results a day or two before students do.

5. Are IGCSE grades on the certificate forever?

Yes. Once issued, your IGCSE grades are permanent records. If you retake a subject and improve your grade, the new grade is reported on your statement of results, but the original grade also remains in the official record. Universities and employers usually focus on your highest achieved grade per subject.

6. What is a good IGCSE grade for A-Level entry?

Most A-Level programmes require a minimum of B (or 6) in the subject you intend to study at A-Level. Sciences (Physics, Chemistry, Biology) and Mathematics typically expect B or above; Further Mathematics often requires A or A*. For competitive Sixth Forms in Dubai, expectations are higher, five or more IGCSEs at A and above, including the subjects you plan to continue.

Know More About: What Grades Do You Need To Do A Levels?

Conclusion

Three things to take away. First, both A*-G and 9-1 are valid IGCSE scales in 2026, and your certificate may show either depending on which board your school uses. Second, grade boundaries change every session, so the percentage you scored matters less than where that percentage sits relative to the boundary set for your session. Third, the grade that matters most for your next step is usually C/4, it’s the universal threshold for A-Level entry and most university requirements, with higher grades opening competitive courses.

Focus on understanding the boundaries for your specific subjects, practice past papers under timed conditions, and treat percentage estimates as a guide rather than a guarantee. If you’d like structured support to hit your target grades, book a free demo class with Ignite, and one of our IGCSE tutors will walk through your specific subjects and target grades with you.

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