GCSEs in England have run on a 9 to 1 grading scale since 2017. Grade 9 sits at the top, grade 1 at the bottom, and U means ungraded. It sounds simple, but the change from the old A*-G scale left a lot of parents and teachers unsure what a grade 5 really means, whether a 4 is a pass, and how a 9 compares to the old A*.
This is a plain-English guide based on published information from the Department for Education, Ofqual and the Joint Council for Qualifications. If you want a single reference to keep bookmarked, this is it.
Key things to know: GCSEs in England use a 9 to 1 scale, 9 is the highest grade, 4 is the government's standard pass, 5 is the strong pass, grade boundaries are set fresh every year, and 21.8% of results in summer 2026 were graded 7 or above.
What is the 9 to 1 GCSE grading scale?
The 9 to 1 scale replaced A*-G in England as part of the reformed GCSEs. Grade 9 is the highest possible result, grade 1 is the lowest awarded grade, and anything below that is recorded as U (ungraded). The scale rolled out in three main waves, according to the Department for Education's Get the Facts guidance: English language, English literature and maths were graded 9 to 1 first, in August 2017. Sciences, languages, humanities and arts followed in 2018. Most remaining subjects landed in 2019, and the final smaller-entry subjects (including biblical Hebrew) came in 2020.
The reformed qualifications also changed how content is assessed. All reformed GCSEs became linear, meaning students sit all exams at the end of the two-year course rather than in modules along the way. Coursework was cut back or removed in most subjects.
How 9 to 1 maps to the old A*-G system
The two scales aren't directly equivalent. Ofqual is explicit about that. But the reform set three deliberate comparability points so parents, employers and universities could still make sense of the change.
According to the government's 9 to 1 scale explained page, the bottom of grade 7 sits at roughly the bottom of the old A, the bottom of grade 4 at roughly the bottom of the old C, and the bottom of grade 1 at roughly the bottom of the old G. Grades 7, 8 and 9 together broadly cover what used to be A and A*, with grade 9 introduced specifically to differentiate the very top performers. Ofqual has explained that the extra headroom at grades 7 to 9 was designed to differentiate more clearly between the highest-performing students.
| New grade (9 to 1) | Rough old equivalent | What it signals |
|---|---|---|
| 9 | Top of A* and above | Reserved for the highest performers, more selective than the old A* |
| 8 | Lower A* | Well above the old A boundary |
| 7 | A | Traditionally strong pass, meets most sixth-form entry criteria |
| 6 | High B | Solid pass, often the threshold for A-Level maths and sciences |
| 5 | Low B / high C | Strong pass in DfE terminology |
| 4 | C | Standard pass, avoids post-16 resit requirement in English and maths |
| 3 | D / E | Below standard pass |
| 2 | E / F | Below standard pass |
| 1 | F / G | Lowest awarded grade |
| U | U | Ungraded |
What counts as a pass? Standard pass vs strong pass
This is where the reform gets confusing. There are now two different pass thresholds in circulation.
A grade 4 is the government's standard pass. It's the minimum grade in English and maths that lets a student avoid the post-16 resit requirement. In practice, most sixth forms and colleges will accept a 4 as a pass, and it's the grade most employers treat as the baseline.
A grade 5 is the strong pass. The Department for Education introduced this label so schools could be measured against a more demanding standard in their headline performance tables. Some selective sixth forms, some apprenticeship providers and some universities use 5 as their minimum. Both figures come from the DfE's 9 to 1 scale explained guidance.
If you're a parent trying to decode a results email: a 4 is a pass in almost every context that matters day to day. A 5 is a stronger pass that opens up a few extra options at post-16 and beyond.
Why grade 9 exists
Grade 9 wasn't just A* renamed. It was designed to sit above the old A* and to identify the very highest performers, which under the old scale had all been bunched into a single top grade.
Because it's more selective, fewer students achieve a 9 than achieved an A* under the old system. Ofqual publishes the exact percentages each summer through its interactive dashboards. The Joint Council for Qualifications' results service breaks this down grade by grade, so if you want the most current picture of how many students got what, that's the place to look.
How grade boundaries are set each year
Grade boundaries are the number of marks needed for each grade on a particular paper in a particular year. They change annually, and there's a reason for that: exam papers vary in difficulty. If one year's chemistry paper turns out harder than the last, boundaries drop so students aren't penalised for the paper's difficulty.
The process is set out in Ofqual's guidance on grading, and there are no quotas either. Boundaries are set through a combination of statistical prediction, which uses students' prior attainment at KS2 to predict roughly how a cohort should perform, and expert judgement from senior examiners who review scripts on the boundary line, which is how the grade 7 boundary on the same paper can shift by several marks from one year to the next.
A good way to see how much boundaries move is to look at past years side by side. We've written up the Edexcel GCSE 2025 grade boundaries if you want a concrete example from one board.
Never treat "you need X% for a grade 9" as a fixed rule. Grade 9 boundaries vary widely by subject, board and year, so check the published boundaries for your specification.
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Combined science: The double grade
GCSE Combined Science is a double award, so it gets a double grade like 9-9, 9-8, 8-8, 8-7, all the way down to 1-1. The two numbers can differ by at most one grade, so 9-7 doesn't exist.
A student taking triple science (separate biology, chemistry and physics) receives three individual grades on the 9 to 1 scale, one per subject. Combined science students receive one composite double grade covering all three sciences. Both routes count as science GCSEs for post-16 progression.
Tiering: Higher and foundation papers
Some GCSEs are tiered, meaning students sit either the higher paper or the foundation paper. Maths, the sciences and most modern foreign languages are tiered. English language and English literature are not.
On a tiered subject, higher tier covers grades 9 to 4 (with a safety-net grade 3 available for students who narrowly miss the higher-tier grade 4), and foundation covers grades 5 to 1. According to the DfE, tiering only exists where a single paper couldn't reasonably let most students demonstrate what they know. Choosing the right tier matters: entering a strong student for foundation caps them at grade 5, while entering a struggling student for higher risks a U.
If you're weighing this up for your subject, the full list of GCSE subjects is a good starting point for which are tiered.
What if you fail or get a U?
First, a small language note: Ofqual calls the lowest outcome ungraded, not failed. It's more than pedantry: 'U' (unclassified/ungraded) is what appears on the results slip; U grades are not printed on the final certificate. If a student receives a U or a grade 1 to 3 in English or maths, government policy in England requires them to keep studying that subject until they turn 18 or achieve at least a grade 4, whichever comes first. For most students that means resitting alongside their post-16 studies.
In every other subject there's no resit requirement. Students can move on to A-Levels, T Levels, vocational qualifications or apprenticeships depending on their overall profile and their post-16 provider's entry requirements. If you're weighing up the options after a rough results day, our guide on what to do if you fail your GCSEs walks through the routes in detail.
GCSE 2026 results in context
The 2026 series gives a useful benchmark for what the distribution looks like now. According to Ofqual's at a glance summary published on 20 August 2026, 5,720,045 GCSE results were awarded, 21.8% at grade 7 or above and 67.0% at grade 4 or above. Those figures are broadly stable year on year and are the numbers to quote when someone asks what a typical GCSE cohort achieves.
Grade 9 remains the exception rather than the norm, and it's designed to be. If your child is targeting a 9 in maths, our guide on how to get a grade 9 in GCSE maths breaks down what that takes in practice.
What about Wales and Northern Ireland?
This guide covers GCSEs in England. Wales and Northern Ireland run their own qualifications systems.
WJEC awards Welsh GCSEs mostly on the A*-G scale, though some subjects sat by students in England (through WJEC's Eduqas brand) use the 9 to 1 scale. CCEA, the Northern Ireland regulator, retains A*-G for most of its GCSEs but uses a nine-grade system with an added C* between C and B. If you're outside England, check the specific board and specification your student is entered for, as the rules and boundaries differ from the English 9 to 1 system described here.
Getting the grade you want
Understanding the scale is one thing; hitting a target grade is another. Cognito's GCSE Maths higher tier lessons for AQA and equivalent courses across the sciences are built around the 9 to 1 mark scheme, with topic breakdowns, practice questions and progress tracking that show exactly where a student sits relative to each grade boundary.
If you're helping a child navigate results day or picking sixth-form courses off the back of GCSE outcomes, the numbers alone rarely tell the full story. Look at the full grade profile, ask the school what a specific grade really means in your subject, and remember that boundaries move each year.
