GCSE results 2026 – What are the grade boundaries and how are they set

Millions of pupils are preparing to find out their GCSE results as results day approaches across England, Wales and Northern Ireland. GCSE results day falls on Thursday (August 20) when students will discover the grades they achieved in this summer’s exams.

But the marks needed to secure each grade are not necessarily the same from one year to the next. Instead, exam boards use grade boundaries to determine the minimum number of marks required for each grade.These boundaries can vary depending on the subject, exam board and difficulty of the paper. They are only set once exams have been taken and marking is nearly complete, meaning pupils cannot know the exact boundaries while sitting their papers. The system is designed so students are not unfairly disadvantaged if an exam is more difficult than in previous years. Generally, a harder paper can result in lower grade boundaries, while an easier paper can lead to higher ones. Official boundaries are published by individual exam boards on results day, allowing pupils to see the marks required for each grade.

A grade boundary is the minimum mark a student needs to achieve a particular GCSE grade.

Boundaries normally change from year to year to account for differences in the difficulty of exam papers and maintain consistency between different cohorts.

In England, GCSEs are graded from 9 to 1, with 9 the highest grade, while a U means “ungraded”.

A grade 4 is considered a “standard pass”, while grade 5 or above is described as a “strong pass”.

Students receiving a grade 3 or below in GCSE maths or English language will generally be required to continue studying the subject and resit it.

Wales continues to use A to G*, while Northern Ireland also uses letter grades, including the C* grade introduced in 2019.

Grade boundaries are not fixed before students enter the exam hall and are instead determined once exams have been taken and marking is nearing completion.

Senior examiners consider factors including the difficulty of the paper, students’ performance and the quality of answers when determining where boundaries should sit.

The principle means that if a particular paper proves harder than one taken by pupils in a previous year, students may need fewer marks to achieve the same grade.

Likewise, boundaries can be higher when a paper is easier, rather than allowing differences in difficulty to make a particular year’s grades more or less valuable.

The process is standardised across exam boards and is intended to make results fair and comparable between different years.

This also means there is no confirmed answer beforehand as to whether 2026 GCSE grade boundaries will be higher or lower than in 2025.

Students will not normally be able to see on their results slip exactly how far they were from achieving the next grade.

However, they should receive marks for individual exam papers alongside their grades, while exam boards publish their grade boundaries on results day.

Marks are not routinely rounded up simply because a pupil falls one or two marks short of the next grade.

In some qualification components, however, marks can be scaled to ensure different parts of an assessment have the correct weighting, with resulting figures rounded to the nearest whole number.

Modern foreign languages provide one example, as listening, reading, speaking and writing are equally weighted despite components potentially having different maximum raw marks.

Official grade boundaries are published by exam boards including AQA, Pearson Edexcel, OCR, CCEA and WJEC, allowing pupils to compare their final marks with the thresholds for each grade.