Understanding the 9-1 GCSE grading system: A guide for parents

The 9-1 grading system replaced the old A*-G grades for GCSEs in England starting in 2017. If your child is taking GCSEs, the numbers on their report will look very different from the letters you received at school. That can be confusing, especially when you are trying to work out whether a grade 5 is something to celebrate or worry about.

This guide explains how the system works in plain English, what each grade means, and why you cannot simply swap a number for a letter and assume they are the same thing.

The government introduced the 9-1 scale as part of a wider reform of GCSEs in England. The main reasons were to make the qualifications more demanding, to better differentiate between students at the top, and to signal clearly that the new exams were different from the old ones.

Under the A*-G system, roughly one in five students achieved an A or A*. The new scale splits that top group more finely. Grade 9, the highest grade, is awarded to only around two to three per cent of students nationally. That means a grade 9 is harder to achieve than the old A* was.

The change also moved most subjects to linear assessment, meaning students sit all their exams at the end of the course rather than in modules along the way. Coursework has been reduced or removed entirely in many subjects.

Grade 9 is the highest. Grade 1 is the lowest pass. Below grade 1, a student receives a U, which stands for ungraded.

The grades do not correspond to fixed percentages. A student does not need to score 90% to get a grade 9 or 40% to get a grade 4. Instead, grade boundaries are set after all the papers have been marked, based on the difficulty of the exam and the performance of the whole cohort that year. This is why the mark needed for a particular grade changes from year to year and from one exam board to another.

Here is a rough guide to what each grade signals about a student's performance:

Grade 9 – exceptional performance, awarded to the very top students nationally.

Grade 8 – excellent, at the upper end of what used to be A*.

Grade 7 – strong performance, broadly equivalent to the old A.

Grade 6 – good performance, sitting between the old B and A.

Grade 5 – a strong pass, above average.

Grade 4 – a standard pass, broadly equivalent to the old C.

Grade 3 – below a standard pass, broadly equivalent to the old D.

Grade 2 – limited achievement, broadly equivalent to the old E.

Grade 1 – very limited achievement, covering the old F and G range.

U – ungraded, meaning the student did not reach the minimum standard.

This is one of the most common questions parents ask, and the answer is slightly more complicated than it used to be. Under the old system, a grade C was widely understood as a pass. Under the 9-1 system, there are two benchmarks.

A grade 4 is a standard pass. The Department for Education considers this the level at which a student has demonstrated sufficient knowledge and skills in the subject. Students who do not achieve a grade 4 in English and Maths are required to continue studying those subjects after GCSEs.

A grade 5 is a strong pass. This is the benchmark used in official school performance measures. When you see league tables or headlines about schools' GCSE results, they are usually reporting the percentage of students who achieved a grade 5 or above.

The table below gives an approximate comparison. It is important to stress that these are not exact equivalences. The exams themselves are different in content, structure, and difficulty, so a grade 7 is not simply a relabelled A. The anchor points set by Ofqual are that a grade 4 broadly corresponds to the old C and a grade 7 broadly corresponds to the old A.

It is tempting to treat the table above as a simple conversion chart, but there are important reasons why that does not work.

First, the exams themselves have changed. GCSEs are now almost entirely exam-based, with less coursework and fewer resit opportunities. The content has been updated and, in many subjects, made more demanding.

Second, the grading method is different. Under the old system, examiners set fixed grade boundaries against expected standards. Under the new system, Ofqual uses a process called comparable outcomes. This means the proportion of students achieving certain grades is kept broadly in line with the old system during the transition period, but the underlying marks and content differ.

Third, the top end has been stretched. If you got an A* in 1998, that covered roughly the top six to seven per cent of students. A grade 9 today covers only the top two to three per cent. So your child's grade 8 might actually reflect a similar level of ability to your A*, even though it does not have a star next to it.

Grades are not based on fixed percentages. There is no rule that says 70% equals a grade 7. Instead, after all papers have been marked, senior examiners review scripts at the key grade boundaries and set the marks needed for each grade based on the quality of work they see.

Ofqual, the exams regulator, oversees this process to make sure standards are consistent across exam boards and between years. The aim is that a grade 5 in 2026 represents the same standard of achievement as a grade 5 in 2025, even if the actual marks needed are different because one paper was harder than the other.

This means your child's grade reflects their achievement against the national standard, not simply a percentage score on a test. Two students with different percentage marks on different exam boards can both receive the same grade if the difficulty of their papers was different.