IGCSE Biology grade boundaries — June 2025
Edexcel International GCSE (Pearson) (4BI1). Minimum raw marks for each grade in the June 2025 series, by tier and paper combination. Pick the option matching the papers you sat.
June 2025 at a glance
- A 9 in Biology required 140/180 (78%) on overall (9–1).
- That 9 threshold is 1 mark lower than June 2024 — slightly easier to achieve.
- Across paper variants, the 9 boundary ranged from 140 to 144 marks — variant choice mattered this session.
- A grade 4 needed roughly 37% on overall (9–1).
Overall (9–1)
| Grade | Min mark | Min % |
|---|---|---|
| 9 | 140 | 78% |
| 8 | 124 | 69% |
| 7 | 109 | 61% |
| 6 | 94 | 53% |
| 5 | 79 | 44% |
| 4 | 65 | 37% |
| 3 | 54 | 30% |
| 2 | 43 | 24% |
| 1 | 32 | 18% |
Maximum mark: 180.
Overall · variant 2 (9–1)
| Grade | Min mark | Min % |
|---|---|---|
| 9 | 144 | 80% |
| 8 | 127 | 71% |
| 7 | 111 | 62% |
| 6 | 96 | 54% |
| 5 | 81 | 45% |
| 4 | 67 | 38% |
| 3 | 56 | 32% |
| 2 | 45 | 25% |
| 1 | 34 | 19% |
Maximum mark: 180.
Calculate your Biology grade →
Figures sourced from the official Edexcel grade threshold tables. Always confirm with your exam board.