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Why the grades changed in the first place
The 9-1 numerical scale was introduced in England from 2017 as part of a broader GCSE reform, designed to differentiate higher-performing students more clearly than the older A*-G scale allowed. By the mid-2010s, the proportion of A* awards in some GCSE subjects had drifted into the top 8 or 10 percent of candidates, which Ofqual and the exam boards judged to be insufficiently selective. The 9-1 scale was designed to reserve the top grade (9) for the strongest 5 to 7 percent of candidates, with grade 8 covering most of the older A* territory and grade 7 sitting roughly at A.
The IGCSE qualifications followed the UK GCSE reform with a lag and across different subjects at different times. Cambridge introduced 9-1 grading on selected subjects from 2017 and continued rolling it out through the late 2010s and early 2020s; Edexcel introduced 9-1 grading on its International GCSE qualifications from 2017 onward. By 2026 most major subjects offered by both boards use the 9-1 scale, but legacy A*-G grading remains in active use for some less commonly examined subjects, particularly minority languages and certain technology and creative options.
The two scales coexist rather than directly substitute. A pupil sitting ten IGCSEs in 2026 might receive five grades on the 9-1 scale (mathematics, English, sciences) and five on the A*-G scale (languages, history, geography, creative subjects) depending on which board and syllabus version the school uses. Schools are not required to harmonise across the school's IGCSE portfolio.
The 9-1 scale explained
The 9-1 scale runs from 9 (highest) to 1 (lowest), with U for ungraded. Grade 9 is reserved for the strongest 5 to 7 percent of candidates in a given subject and is intentionally harder to achieve than the older A*. Grade 8 covers most of the older A* territory plus the top end of the A grade. Grade 7 maps roughly to the older A. Grade 6 maps to the older B. Grade 5 is a strong pass and is sometimes described as a strong 4 or a strong pass; it lies between the older B and C. Grade 4 maps to the older C and is considered a standard pass.
Below grade 4 the scale runs grade 3 (D), grade 2 (E to F), and grade 1 (G). The two ungraded labels (U and unsuccessful) appear for candidates who do not achieve the minimum mark threshold. Most academically selective schools treat grade 5 as a minimum acceptable performance and grade 6 as a clear pass for A Level entry purposes.
The grade boundaries are not fixed at percentage thresholds. The 9-1 scale uses a relative grading model that adjusts boundaries to the candidate cohort each year. This means a candidate who scores 82 percent in one year may earn a grade 8, while a candidate scoring the same 82 percent in a more competitive year may earn a 9, depending on the cohort distribution. The boundaries are published by the exam boards after each examination cycle.
What grade 9 looks like in practice
A grade 9 candidate at IGCSE typically scores in the top 5 to 7 percent of all candidates who sat that subject globally in that year. The strongest international schools produce 30 to 50 percent grade 9 outcomes in core subjects (mathematics, English Literature, sciences); mid-tier international schools produce 8 to 15 percent grade 9 outcomes; weaker schools produce 1 to 5 percent. The school's track record across recent years is a good proxy for the likelihood of a pupil there earning grade 9.
The grade 9 also affects university applications, particularly the personal statement and the school reference. Pupils with strong IGCSE results, multiple grade 9s and high predicted A Level grades have a markedly stronger UCAS application than pupils with the same A Level predictions but weaker IGCSE foundations. Oxbridge in particular reads IGCSE results carefully as a benchmark of consistent academic performance.
Compare schools by IGCSE outcomes
The compare tool puts two or three schools side by side on the proportion of grade 9 and A* outcomes by subject. The school finder filters by published IGCSE result distributions. Visit our British curriculum hub for the wider library.
Are universities reading 9 and A* the same
UK universities, including the Russell Group, formally treat grade 9 and A* as equivalent for entry requirements. UCAS tariff points are identical at the top of the IGCSE scale. The published offer levels at UK universities use either letter or number grading depending on which the candidate's school uses, with the two treated as interchangeable.
Informally, university admissions teams at Oxbridge and the most selective Russell Group institutions are aware that grade 9 is meant to be harder than A* and may give modest extra weight to a 9 in a competitive subject. The effect is usually subtle and rarely the deciding factor, but it exists. The deeper effect is on the school's overall predicted grade discipline: schools producing many grade 9 candidates tend to be the schools producing many A*A*A A Level candidates.
Non-UK universities (US, Canada, Australia, Europe) generally read both grades as a top mark without distinguishing between them. US universities translating into the 4.0 GPA scale treat both 9 and A* as A or A+ equivalents. Canadian and Australian universities use the IGCSE grades primarily as a benchmark of secondary school performance rather than as a tariff input.
Mixed transcripts: when students sit both scales
Most pupils in 2026 sit a mixed IGCSE transcript with some subjects on the 9-1 scale and others on the older A*-G scale. The mix depends on the board and syllabus chosen by the school. Mathematics, English and the three sciences are usually 9-1; languages and humanities can vary; creative and technology subjects are more often A*-G. Pupils and parents should not read too much into the scale mix; it reflects board and subject decisions rather than school quality.
Schools usually print transcripts that include both scales as issued by the exam board. UK universities and overseas universities accept the mixed transcript and read both scales as part of the candidate's profile. There is no benefit to converting one scale into another on the transcript itself; the exam board grades are the official record.
Pupils planning to apply to universities that prefer one scale should not worry about scale mix in the transcript. A 9 and an A* are both top grades; an 8 and an A are both strong grades; a 7 and an A- are both above the standard sixth form threshold. The narrative of the transcript matters more than the scale on individual papers.
Practical implications for Year 11 families
Three practical implications for parents in Year 11. First, take both scales seriously when reading school reports. A predicted grade 8 is a strong predicted grade and should not be dismissed as not a 9. A predicted A* is also a strong predicted grade; the calibration is similar at the top of both scales.
Second, ask the school which papers are 9-1 and which are A*-G. Some schools tell parents in advance; some leave it for the results day surprise. Knowing which scale to expect on each subject helps the family read the August results envelope without confusion.
Third, plan A Level subject choices around grade thresholds for sixth form entry. Selective sixth forms typically require 6 or 7 (or B or A) for A Level entry in non-science subjects, and 7 or 8 (or A or A*) for A Level entry in sciences. Pupils targeting selective sixth forms should aim for the relevant threshold in each subject they hope to continue. Our piece on choosing IGCSE subjects in Year 10 covers the downstream planning. Use the compare tool to identify schools whose sixth form entry policies you can review in advance.
Related guides
- IGCSE versus GCSE: what is actually different
- Choosing IGCSE subjects in Year 10
- Cambridge versus Edexcel IGCSE
Frequently asked questions
Is a grade 9 harder than an A*?
Yes, slightly. A grade 9 is awarded to roughly the top 5 to 7 percent of candidates per subject, whereas the older A* covered the top 8 to 10 percent. The 9-1 scale was deliberately designed to differentiate strongly at the top, with grade 8 covering most of the older A* territory.
Do universities prefer 9 over A* for offers?
Formally no, universities treat the two as equivalent for entry requirements. Informally, Oxbridge and the most selective Russell Group admissions teams know grade 9 is the harder mark and may weight it slightly more, but the effect is usually subtle and rarely decisive.
Will my child have a disadvantage if they sit some subjects on A*-G and others on 9-1?
No. Mixed transcripts are normal in 2026 and universities read both scales without prejudice. The board and syllabus chosen by the school determine which scale applies per subject; the candidate has no choice in the matter and universities understand that.