Understanding Cambridge IGCSE Biology (0610) grade boundaries helps you set realistic revision targets and know exactly how far you are from the next grade. This guide explains what the boundaries have looked like historically, how Cambridge sets them, and how to use them in your revision.

What Are IGCSE Biology Grade Boundaries?

Cambridge IGCSE Biology (0610) is assessed across multiple papers — typically Paper 1 (multiple choice), Paper 2 or 3 (structured questions), and Paper 5 or 6 (practical or alternative to practical). The combined total is 200 marks.

Grade boundaries are the minimum raw marks required for each grade (A*, A, B, C, D, E). They are not fixed percentages — Cambridge sets them fresh after each examination series, based on the difficulty of that year’s papers.

Historical IGCSE Biology Grade Boundaries (Cambridge 0610)

The following figures are approximate historical averages from Cambridge’s published grade threshold documents for the May/June series:

Year	A*	A	B	C	D	E	Total
2024	162	133	105	78	53	37	200
2023	158	130	103	77	52	36	200
2022	160	132	104	78	53	37	200
2021	156	128	101	75	51	35	200
2019	155	127	100	74	50	34	200

Figures are approximate averages. Always verify against official Cambridge grade threshold documents for your specific series.

How Cambridge Sets IGCSE Biology Boundaries

Cambridge does not use a fixed percentage for each grade. Instead, after each examination series:

1. Senior examiners review the difficulty of the papers against previous years
2. Statistical modelling ensures grade outcomes remain consistent year to year
3. Boundaries are set to reflect what a student of that grade level should be able to demonstrate

This means boundaries can shift by ±8–15 marks between years. A very difficult paper will have lower boundaries (fewer marks needed for the same grade). An easier paper will have higher boundaries.

What Does This Mean for Your Revision?

Don’t target a fixed percentage. A common mistake is aiming for “80% = A*”. In practice, the A* boundary in Biology has ranged from 155 to 165 out of 200 in recent years — that’s 77.5% to 82.5%. Targeting 80% is too imprecise.

Instead, target the mark. Based on historical averages:

• A:* aim for 160+ out of 200
• A: aim for 130+ out of 200
• B: aim for 103+ out of 200
• C: aim for 77+ out of 200

Use past papers to track your marks. After each past paper, record your raw mark and compare it against historical boundaries. This tells you which grade band you’re currently in and how many marks you need to move up.

Which Topics Carry the Most Marks in IGCSE Biology?

Focusing revision on high-mark topics maximises your return:

Consistently high-mark topics across all papers:

• Cells and cell division (Paper 1 + Paper 2/3)
• Enzymes and biological molecules
• Transport in animals (blood, heart, circulation)
• Gas exchange (alveoli, lungs)
• Respiration (aerobic and anaerobic equations)
• Inheritance and genetics (monohybrid crosses, Punnett squares)
• Coordination and response (nervous system, hormones)

Paper 5/6 (Practical/Alternative to Practical):

• Standard experimental methods (osmosis, photosynthesis, enzyme experiments)
• Interpreting graphs and identifying anomalies
• Suggesting improvements to experimental design

How Far Are You from the Next Grade?

The fastest way to see exactly where you stand is to enter your practice marks into the Grade Boundary Tracker — it shows you which grade band your mark falls into based on historical Cambridge data, and how many marks separate you from the grade above.

Check your Biology grade boundary →

Predicting Your Grade from Mock Results

If you’ve sat mock papers or practice tests, you can get a prediction of your likely final grade based on historical boundaries. The Grade Predictor takes your marks across multiple Biology papers and gives you a predicted grade with a confidence level — showing whether you’re comfortably in a grade or borderline.

Predict your IGCSE Biology grade →

The Most Effective Way to Close the Gap

Once you know which grade band you’re in and how many marks you need for the next grade, the question is: where are those marks coming from?

Exam technique, not just content knowledge. The most common reason IGCSE Biology students lose marks is not missing content — it’s writing answers that don’t match what the mark scheme wants. “The enzyme stops working” earns 0; “the active site changes shape (denatures) so the substrate can no longer bind” earns 2 marks.

Use the Mark Scheme Decoder for IGCSE Biology to practise writing answers exactly the way Cambridge marks them — with instant auto-marked feedback.

Topic-by-topic practice. If specific topics are dragging your score down, practise those topics in isolation using the Topic Question Bank — select Biology, pick the topic you’re weakest on, and access past paper questions organised by topic.

Find an IGCSE Biology tutor →

Browse IGCSE Biology resources →

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