In June 2025, an A* in Edexcel A Level Biology B (9BI0) needed 217 marks out of 300 (72%), an A needed 188 (63%) and a pass at E needed 78 (26%). At AS (8BI0), an A needed 92 out of 160 (58%).
All marks below are raw marks from Pearson's published grade boundaries. Your grade comes from your total across the papers; the boundaries for each paper are Pearson's notional component boundaries, a guide to how you did on that paper rather than a separate grade.
A level (9BI0) grade boundaries, June 2025
| Grade | Marks out of 300 | Percentage |
|---|---|---|
| A* | 217 | 72% |
| A | 188 | 63% |
| B | 160 | 53% |
| C | 132 | 44% |
| D | 105 | 35% |
| E | 78 | 26% |
9BI0 grade boundaries by paper, June 2025
| Paper | A* | A | B | C | D | E |
|---|---|---|---|---|---|---|
| Paper 1 (9BI0/01, out of 90) | 59 | 51 | 43 | 35 | 27 | 20 |
| Paper 2 (9BI0/02, out of 90) | 73 | 63 | 54 | 45 | 36 | 28 |
| Paper 3 (9BI0/03, out of 120) | 85 | 74 | 63 | 52 | 41 | 30 |
AS (8BI0) grade boundaries, June 2025
| Grade | Marks out of 160 | Percentage |
|---|---|---|
| A | 92 | 58% |
| B | 81 | 51% |
| C | 70 | 44% |
| D | 60 | 38% |
| E | 50 | 31% |
8BI0 grade boundaries by paper, June 2025
| Paper | A | B | C | D | E |
|---|---|---|---|---|---|
| Paper 1 (8BI0/01, out of 80) | 45 | 39 | 34 | 29 | 24 |
| Paper 2 (8BI0/02, out of 80) | 47 | 41 | 36 | 31 | 26 |
How to use these grade boundaries
- Sit the June 2025 paper timed, then mark it strictly with the mark scheme.
- Check your raw mark against the boundaries for that paper above to see roughly where you are.
- Read the examiners' report for every question where you dropped marks.
Boundaries move from year to year as papers get harder or easier. See how they compare across every year.
Practise with this series
- Edexcel Biology B past papers, mark schemes and examiners' reports
- Edexcel Biology B grade boundaries for every year
Source: Pearson, grade boundaries, June 2025 (PDF) and notional component grade boundaries, June 2025 (PDF).