Grade boundaries, straight from the boards.

What grade boundaries actually mean

Grade boundaries are set after the exam, not before. Once papers are marked, the awarding body looks at how the cohort performed and decides where each grade sits — adjusting upward if the paper was easier than usual, downward if it was harder. The aim is roughly the same proportion of students hitting each grade year on year.

That’s why you can’t reliably revise to "get 80% for an A". The 80% mark might be a B one year and an A* the next.

Typical GCSE 9-1 boundary ranges

Indicative only — always verify with the specific year and paper from the awarding body.

• Grade 9 — typically 80–90% of total marks (varies sharply by paper difficulty).
• Grade 7 (≈ old A) — typically 65–75% of marks.
• Grade 4 (standard pass) — typically 30–45% of marks. In some sciences it can drop into the 20s on harder papers.
• Grade 1 — typically 5–10% of marks; a working-level pass below "standard".

A-Level: UMS vs raw

A-Levels publish two sets of boundaries. Raw boundaries refer to the marks you actually scored on the paper. UMS (Uniform Mark Scale) translates that to a standardised score so units from different sittings can be compared. The raw boundary is the one you see on the front page; UMS sits behind it.

Where students misread boundaries

1. Cherry-picking the easy year — comparing your mock to the year with the lowest grade-9 boundary. Average the last three series instead.
2. Forgetting the tier — Foundation tier maths caps at grade 5. Sitting Higher with a target of 5 means hitting only the lowest 30% of marks; Foundation gives more headroom.
3. Treating it as a ladder — the gap from 7 to 8 is often only 5–8 marks. The gap from 8 to 9 can be similar. That’s frequently two questions, not three months of study.
4. Ignoring paper-specific boundaries — boundaries are set across all papers in the qualification, but per-paper UMS conversion still varies. Don’t assume 80% on Paper 2 means the same as 80% on Paper 1.