On the most recent published boundaries, a B in AQA A-level Biology needed 146 out of 260 — 56%. That is June 2026's boundary, not a promise about next summer.
| Marks needed (June 2026) | 146 / 260 |
| As a percentage | 56% |
| Marks above a C | 28 |
| Marks short of an A | 28 |
| Highest this boundary has been | 146 (56%) |
| Lowest this boundary has been | 139 (53%) |
Based on the B boundary of 146 out of 260. Next summer's boundary will differ — see the range below.
| Series | Marks | % |
|---|---|---|
| June 2026 | 146 | 56% |
| June 2025 | 139 | 53% |
| June 2024 | 140 | 54% |
Across the 3 years on record this boundary has ranged from 139 to 146 — a spread of 7 marks. Aiming at the most recent figure means aiming at the middle of a moving target, so 148 is the safer number: the highest it has been, plus a small buffer for a year that has not happened yet.
Boundaries are set after every paper is marked, precisely so that a grade means the same thing in an easy year and a hard one. That is why nobody — not this page, not your teacher, not the board — can tell you next summer's number in advance. Anyone who gives you one exactly is guessing.
146 out of 260 — 56% — on the June 2026 boundaries. Across the years on record it has ranged 139 to 146, so aim nearer 148.
Almost certainly not. Boundaries are set after marking so that a grade represents the same standard however hard the paper was. A harder paper gets a lower boundary and an easier one gets a higher boundary.
28 marks on the most recent boundaries — usually a question or two, not a different student.
Boundaries read 18 August 2026 from the official AQA document: source PDF.
Boundaries read 19 August 2026 from the exam boards' own documents. Boundaries are set per series and never apply to a future paper.