Grades & grade boundaries
What are grade boundaries and how do they work?
A grade boundary is the minimum mark needed for each grade on a specific exam. Exam boards set them fresh after all marking is finished each summer, using senior examiner judgement plus statistics, so a grade means the same standard even when papers vary in difficulty. Official boundaries are published on each board’s website on results day - any number circulating before that is guesswork.
Last updated 29 July 2026 · Written and fact-checked by the GCSEwiz team
Who sets boundaries, and when
Each exam board sets its own boundaries for each subject, tier and series, at awarding meetings held after every script has been marked. Senior examiners look at real student work around the possible boundary marks, alongside statistical evidence about the cohort, and Ofqual oversees the process so standards line up across boards and across years. The results are published on the board's website on results day itself - not before, because they genuinely do not exist before.
Why boundaries move every year
No two exam papers are equally difficult, however carefully they are written. Boundary-setting is how the system corrects for that: if this year's paper ran harder than last year's, the boundaries drop so that the same underlying performance earns the same grade. If the paper ran gentler, they rise. The moving number is what keeps the grade honest.
That is why comparing boundaries across years tells you about the papers, not about the students - a lower boundary does not mean a weaker cohort, it means a tougher exam.
Where to find the official boundaries
Every board publishes its boundaries openly, including archives of past years - which are genuinely useful for planning:
- AQA, Pearson Edexcel, OCR and WJEC/Eduqas each publish a grade-boundaries page on their own website, updated on results day.
- Past years’ boundaries stay published - a free, official planning anchor for marks-per-paper targets.
- Your school’s exams officer can tell you which board and specification you are entered for, if you are not sure.
Why chasing predicted boundaries is a distraction
Between papers and after the series, forums fill with boundary predictions. None of them have the marking data, so none of them can be right except by luck - and even a perfect prediction would change nothing you can act on. The boundary is set after your marks are in; the marks are the only lever you hold. Spend the energy on the next paper, or on the topics that earn marks, and let the boundary land where it lands.