IGCSE Biology (0610) grade boundaries — June 2026

Cambridge IGCSE (CAIE) (0610). 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 Biology required 165/200 (83%) on extended · papers 21, 41, 51.
That A* threshold is 6 marks lower than March 2026 — slightly easier to achieve.
Across paper variants, the A* boundary ranged from 165 to 171 marks — variant choice mattered this session.
A grade C needed roughly 41% on extended · papers 21, 41, 51.

Core · Papers 11, 31, 51

Grade	Min mark	Min %
C	111	56%
D	95	48%
E	80	40%
F	65	33%
G	50	25%

Maximum mark: 200.

Core · Papers 11, 31, 61

Grade	Min mark	Min %
C	112	57%
D	96	48%
E	81	41%
F	67	34%
G	53	27%

Maximum mark: 200.

Core · Papers 12, 32, 52

Grade	Min mark	Min %
C	115	58%
D	101	51%
E	88	44%
F	75	38%
G	62	31%

Maximum mark: 200.

Core · Papers 12, 32, 62

Grade	Min mark	Min %
C	116	58%
D	102	51%
E	88	44%
F	75	38%
G	62	31%

Maximum mark: 200.

Core · Papers 13, 33, 53

Grade	Min mark	Min %
C	104	52%
D	91	46%
E	78	39%
F	63	32%
G	48	24%

Maximum mark: 200.

Core · Papers 13, 33, 63

Grade	Min mark	Min %
C	105	53%
D	91	46%
E	77	39%
F	62	31%
G	47	24%

Maximum mark: 200.

Core · Papers 17, 31, 51

Grade	Min mark	Min %
C	111	56%
D	95	48%
E	80	40%
F	65	33%
G	50	25%

Maximum mark: 200.

Core · Papers 17, 31, 61

Grade	Min mark	Min %
C	112	57%
D	96	48%
E	81	41%
F	67	34%
G	53	27%

Maximum mark: 200.

Extended · Papers 21, 41, 51

Grade	Min mark	Min %
A*	165	83%
A	137	69%
B	109	55%
C	82	41%
D	72	36%
E	63	32%
F	53	27%
G	43	22%

Maximum mark: 200.

Extended · Papers 21, 41, 61

Grade	Min mark	Min %
A*	166	83%
A	138	69%
B	110	56%
C	83	42%
D	73	37%
E	64	32%
F	55	28%
G	46	23%

Maximum mark: 200.

Extended · Papers 22, 42, 52

Grade	Min mark	Min %
A*	167	84%
A	141	71%
B	115	58%
C	89	45%
D	76	38%
E	64	32%
F	53	27%
G	42	21%

Maximum mark: 200.

Extended · Papers 22, 42, 62

Grade	Min mark	Min %
A*	167	84%
A	141	71%
B	115	58%
C	90	45%
D	77	39%
E	64	32%
F	53	27%
G	42	21%

Maximum mark: 200.

Extended · Papers 23, 43, 53

Grade	Min mark	Min %
A*	171	86%
A	146	73%
B	121	61%
C	96	48%
D	85	43%
E	74	37%
F	63	32%
G	52	26%

Maximum mark: 200.

Extended · Papers 23, 43, 63

Grade	Min mark	Min %
A*	169	85%
A	145	73%
B	121	61%
C	97	49%
D	85	43%
E	73	37%
F	62	31%
G	51	26%

Maximum mark: 200.

Extended · Papers 27, 41, 51

Grade	Min mark	Min %
A*	165	83%
A	137	69%
B	109	55%
C	82	41%
D	72	36%
E	63	32%
F	53	27%
G	43	22%

Maximum mark: 200.

Extended · Papers 27, 41, 61

Grade	Min mark	Min %
A*	166	83%
A	138	69%
B	110	56%
C	83	42%
D	73	37%
E	64	32%
F	55	28%
G	46	23%

Maximum mark: 200.

Extended · Papers 50

Grade	Min mark	Min %
A*	82	92%
A	75	84%
B	66	74%
C	57	64%
D	49	55%
E	41	46%
F	33	37%
G	25	28%

Maximum mark: 90.

Calculate your Biology grade →

Official source (PDF) →

Figures sourced from the official Cambridge grade threshold tables. Always confirm with your exam board.