IGCSE Computer Science (0478) grade boundaries — June 2026
Cambridge IGCSE (CAIE) (0478). The official grade thresholds for the June 2026 series — the minimum raw mark needed for each grade, by tier and paper combination. Pick the option matching the papers you sat.
Cambridge publishes these as grade threshold tables: "grade thresholds" and "grade boundaries" are two names for the same numbers.
June 2026 at a glance
- A A* in Computer Science required 117/150 (78%) on extended · papers 11, 21.
- That A* threshold is 6 marks higher than March 2026 — slightly harder to achieve.
- Across paper variants, the A* boundary ranged from 115 to 120 marks — variant choice mattered this session.
- A grade C needed roughly 31% on extended · papers 11, 21.
Extended · Papers 11, 21
| Grade | Min mark | Min % |
|---|---|---|
| A* | 117 | 78% |
| A | 93 | 62% |
| B | 69 | 46% |
| C | 46 | 31% |
| D | 39 | 26% |
| E | 32 | 22% |
| F | 25 | 17% |
| G | 18 | 12% |
Maximum mark: 150.
Extended · Papers 12, 22
| Grade | Min mark | Min % |
|---|---|---|
| A* | 120 | 80% |
| A | 94 | 63% |
| B | 68 | 46% |
| C | 43 | 29% |
| D | 36 | 24% |
| E | 29 | 20% |
| F | 22 | 15% |
| G | 15 | 10% |
Maximum mark: 150.
Extended · Papers 13, 23
| Grade | Min mark | Min % |
|---|---|---|
| A* | 115 | 77% |
| A | 91 | 61% |
| B | 67 | 45% |
| C | 43 | 29% |
| D | 36 | 24% |
| E | 30 | 20% |
| F | 24 | 16% |
| G | 18 | 12% |
Maximum mark: 150.
Extended · Papers 50
| Grade | Min mark | Min % |
|---|---|---|
| A* | 79 | 88% |
| A | 69 | 77% |
| B | 54 | 60% |
| C | 40 | 45% |
| D | 34 | 38% |
| E | 28 | 32% |
| F | 22 | 25% |
| G | 16 | 18% |
Maximum mark: 90.
Calculate your Computer Science grade →
Figures sourced from the official Cambridge grade threshold tables. Always confirm with your exam board.