IGCSE grade boundaries 2026 are set after each exam series and show the minimum marks needed for each grade (A*, A, B, C, etc.). They are among the most searched IGCSE topics because students want to know what score they need to reach their target grade. This guide explains how boundaries work, why they change, and how to use past boundaries and practice to aim for A* or your target grade in 2026.

How IGCSE Grade Boundaries Work

Grade boundaries are not fixed. Exam boards set them after marking each series, using:

• Difficulty of the paper – If a paper is harder than in previous years, the board may lower the mark needed for each grade so that candidates are not unfairly penalised. So a “hard” year might have a lower percentage for A* than an “easy” year.
• Performance of the cohort – Boundaries are often aligned to previous years’ standards so that grades are comparable over time. The board looks at how the whole cohort performed and sets cut-offs accordingly.
• Component weighting – Your final grade is usually a combination of several papers (e.g. Paper 1, Paper 2, and sometimes coursework or practical). Each component has a weighting. The syllabus grade boundary is the total mark (across all components) needed for each grade. So you might see boundaries for individual components and for the overall subject.

Because boundaries are set after the exams, “boundaries for 2026” will only be known after the May/June and October/November 2026 series. You cannot know the exact A* mark for 2026 in advance.

Where to Find Past Grade Boundaries

Cambridge and Edexcel publish grade thresholds (another name for grade boundaries) on their websites after each series. You can download PDFs or view them online, usually by subject and series (e.g. May/June 2024, October/November 2024). Your school may also give you a summary. Use these past boundaries as a guide to the typical range of marks for A*, A, B, and so on in your subject.

Historical Grade Boundary Data: Typical A* Thresholds by Subject

While exact boundaries change every series, looking at trends from recent years gives you a reliable target range. The tables below show approximate typical A percentage thresholds* for some of the most popular Cambridge IGCSE subjects across recent examination series. These are based on the overall syllabus mark (all components combined).

Note: These are approximate ranges compiled from publicly available grade threshold documents. Actual boundaries vary by series and variant. Always check the official Cambridge or Edexcel threshold documents for precise figures.

Mathematics (0580)

Series	A* Threshold (approx. %)	A Threshold (approx. %)	Notes
May/Jun 2023	86–90%	74–78%	Extended paper; core has separate boundaries
Oct/Nov 2023	85–89%	73–77%	Slight variation between variants
May/Jun 2024	84–88%	72–76%	Paper considered slightly harder
Oct/Nov 2024	86–90%	74–78%	Returned to typical range

Typical A range: 84–90%* — Maths boundaries tend to be relatively stable. The Extended paper (Papers 2 and 4) is what determines A* eligibility. Aim for 88%+ to give yourself a comfortable buffer.

Physics (0625)

Series	A* Threshold (approx. %)	A Threshold (approx. %)	Notes
May/Jun 2023	85–89%	72–76%	Includes practical component
Oct/Nov 2023	83–87%	70–74%	Paper 4 was reportedly harder
May/Jun 2024	84–88%	71–75%	Standard difficulty
Oct/Nov 2024	85–89%	73–77%	Aligned with previous years

Typical A range: 83–89%* — Physics boundaries can fluctuate more than Maths because the practical paper (Paper 5 or 6) introduces variability. Strong practical skills can boost your overall mark significantly.

Chemistry (0620)

Series	A* Threshold (approx. %)	A Threshold (approx. %)	Notes
May/Jun 2023	84–88%	71–75%	Extended paper route
Oct/Nov 2023	82–86%	69–73%	Lower boundary; harder paper
May/Jun 2024	83–87%	70–74%	Moderate difficulty
Oct/Nov 2024	84–88%	72–76%	Typical range

Typical A range: 82–88%* — Chemistry tends to sit slightly lower than Maths, partly because organic chemistry and stoichiometry questions can be challenging. Thorough revision of practical techniques and calculation methods is essential.

Biology (0610)

Series	A* Threshold (approx. %)	A Threshold (approx. %)	Notes
May/Jun 2023	83–87%	70–74%	Extended paper
Oct/Nov 2023	81–85%	68–72%	Harder experimental questions
May/Jun 2024	82–86%	69–73%	Standard
Oct/Nov 2024	83–87%	71–75%	Typical range

Typical A range: 81–87%* — Biology often has slightly lower A* boundaries than Physics and Chemistry. Extended response questions (Paper 4) require precise scientific terminology — many students lose marks here through vague wording.

English Language (0500)

Series	A* Threshold (approx. %)	A Threshold (approx. %)	Notes
May/Jun 2023	82–86%	70–74%	Reading + Writing components
Oct/Nov 2023	80–84%	68–72%	Writing component harder
May/Jun 2024	81–85%	69–73%	Standard range
Oct/Nov 2024	82–86%	70–74%	Consistent

Typical A range: 80–86%* — English Language boundaries are generally among the lower ones. The subjective nature of marking (especially in the writing component) means marks can vary. Focus on clear, structured writing and precise comprehension answers.

Economics (0455)

Series	A* Threshold (approx. %)	A Threshold (approx. %)	Notes
May/Jun 2023	83–87%	70–74%	Paper 1 (MCQ) + Paper 2 (structured)
Oct/Nov 2023	81–85%	68–72%	Data response questions harder
May/Jun 2024	82–86%	69–73%	Standard
Oct/Nov 2024	83–87%	71–75%	Typical range

Typical A range: 81–87%* — Economics rewards students who can apply theory to real-world scenarios. The structured questions (Paper 2) carry most of the marks, so practice writing concise, well-reasoned answers with clear economic terminology.

Business Studies (0450)

Series	A* Threshold (approx. %)	A Threshold (approx. %)	Notes
May/Jun 2023	82–86%	69–73%	Case study + short answer
Oct/Nov 2023	80–84%	67–71%	Harder case study
May/Jun 2024	81–85%	68–72%	Standard
Oct/Nov 2024	82–86%	70–74%	Consistent

Typical A range: 80–86%* — Business Studies tends to have slightly lower boundaries. The case study paper requires you to apply business concepts to unfamiliar scenarios. Students who practise with a variety of case studies and use proper business terminology tend to score higher.

Summary: Typical A* Percentage Ranges Across Subjects

Subject	Code	Typical A* Range	Typical A Range
Mathematics	0580	84–90%	72–78%
Physics	0625	83–89%	70–77%
Chemistry	0620	82–88%	69–76%
Biology	0610	81–87%	68–75%
English Language	0500	80–86%	68–74%
Economics	0455	81–87%	68–75%
Business Studies	0450	80–86%	67–74%

Key takeaway: Most IGCSE subjects require roughly 80–90% for an A*. The “safest” target is to consistently score 5–8 percentage points above the typical A* threshold in your past paper practice.

CIE vs Edexcel: How Grade Boundaries Differ Between Boards

Students taking IGCSEs may sit exams through Cambridge International (CIE) or Edexcel International GCSE. While both lead to equivalent qualifications, their grade boundary systems work differently.

Cambridge International (CIE)

• Grades: A to G* (with U for ungraded)
• Boundaries are published as raw marks out of the total for each syllabus
• Separate thresholds for each component and for the overall syllabus
• Boundaries are set per series (May/June and October/November) and can vary between variants (e.g. Variant 1 vs Variant 2)
• CIE publishes grade thresholds as downloadable PDFs on their website after each series
• Uniform Mark Scales (UMS) are not used — it is purely raw marks

Edexcel International GCSE

• Grades: 9 to 1 (with U for ungraded), following the numerical grading system
• Grade 9 is the highest and roughly equivalent to a high A*
• Edexcel uses Uniform Mark Scales (UMS) for some subjects, which converts raw marks to a standardised scale
• Boundaries can appear more stable because the UMS absorbs some of the year-to-year variation
• Grade boundaries are published on the Pearson Edexcel website after each series

Key Differences at a Glance

Feature	Cambridge (CIE)	Edexcel International
Grading scale	A* to G	9 to 1
Boundary format	Raw marks	Raw marks + UMS (some subjects)
Top grade	A*	Grade 9
Variants	Multiple variants per series	Usually one variant
Publication	Cambridge website PDFs	Pearson Edexcel website
Typical A*/9 range	80–90% (varies by subject)	75–85% raw (UMS may differ)

Which Board Has Higher Boundaries?

There is no simple answer. CIE papers are often considered more content-heavy, while Edexcel papers may have a different question style. Some students find Edexcel boundaries slightly lower in raw mark terms, but this can vary by subject and year. The most important thing is to check the boundaries for your specific board, subject, and series rather than making assumptions based on the board name.

Subject-by-Subject Guide: Which Subjects Have Higher or Lower Boundaries?

Not all IGCSE subjects are created equal when it comes to grade boundaries. Here is a quick guide to help you calibrate your expectations.

Subjects with Typically Higher A* Boundaries (85%+)

• Mathematics (0580) — Boundaries tend to be among the highest because the marking is objective (right or wrong). If you can avoid careless errors, high marks are achievable.
• Additional Mathematics (0606) — Even higher than standard Maths in some series, with A* sometimes requiring 88%+ because the cohort is self-selected (stronger maths students).
• Physics (0625) — Calculation-based questions with definitive answers push boundaries higher.

Subjects with Moderate A* Boundaries (80–85%)

• Chemistry (0620) — A mix of factual recall, calculations, and application questions keeps boundaries in the mid-range.
• Biology (0610) — Extended response questions with subjective marking can lower boundaries slightly.
• Economics (0455) — Requires both knowledge and application; boundaries sit in the middle.
• Computer Science (0478) — Programming and theory components; boundaries vary depending on the practical element.

Subjects with Typically Lower A* Boundaries (75–82%)

• English Language (0500) — Subjective marking in writing components tends to compress marks, leading to lower raw boundaries.
• English Literature (0475) — Similar to Language; essay-based assessment means fewer students reach very high raw marks.
• Business Studies (0450) — Case study responses are marked holistically, which can lower the top-end marks.
• History (0470) — Source-based and essay questions; achieving very high marks requires exceptional analytical skills.
• Art and Design (0400) — Coursework-heavy with subjective assessment; boundaries reflect this.

What Does This Mean for You?

If you are taking a mix of subjects, your revision strategy should account for these differences. A student scoring 82% in Maths might be below A*, but 82% in English Language could well be A*. Always check the specific boundaries for your subject rather than applying a blanket percentage target.

What You Can Do Before 2026

Use past boundaries as a rough guide

Look at the 2024 and 2025 grade boundaries for your subjects. They often sit in a similar range from year to year (e.g. A* might be around 80–88% in one subject). This gives you a target range to aim for, not an exact number.

Aim for a buffer above the threshold

Boundaries can shift by a few marks from year to year. If last year’s A* was 85%, aim to be scoring around 88–90% in your practice so that even if the boundary goes up slightly, you are still safely in the A* band. A buffer of a few percent reduces the risk of falling just short.

Practice with past papers and mark strictly

Do past papers under timed conditions and mark yourself with the official mark scheme. Add up your total and express it as a percentage of the maximum. That tells you whether you are currently in the A*, A, or B range (using past boundaries as a guide). If you are just below the previous A* boundary, focus on the topics or question types where you lose the most marks.

Understand component boundaries

Some subjects have several components (e.g. multiple papers). The syllabus boundary is what matters for your final grade, but it is built from component marks. If one paper is out of 80 and another out of 120, the total is out of 200 and the grade boundaries will be given as marks out of 200. Make sure you know how your subject is weighted so you can prioritise revision and exam technique where it has the biggest impact.

Why Grade Boundaries Change

• Difficulty – A harder paper often leads to lower raw mark boundaries.
• Cohort size and ability – The board aims for consistency; they do not fix the percentage in advance.
• Syllabus or format changes – When a new syllabus is introduced or the exam format changes, the first few series may have boundaries that settle over time.

So you should treat boundaries as informative for planning and target-setting, but not as a guarantee. The best strategy is always to maximise your marks through thorough revision and exam technique.

How to Use Boundaries When Revising

• Set a target – e.g. “I want to be scoring at least 85% in past papers so I am in the A* zone.”
• Track your progress – After each past paper, work out your percentage and see if you are above or below your target.
• Focus on weak areas – If you are at 82% and need 85%, identify which questions or topics cost you those 3% and practise them.
• Don’t obsess over one mark – Boundaries are usually not single marks; they are ranges. A small improvement across several questions often pushes you into the next grade.

Re-marks and Grade Boundaries

If you are very close to a grade boundary (e.g. one or two marks below A*), you may be able to request a re-mark (check your centre’s and the board’s deadlines and fees). Re-marks can sometimes result in a mark change that pushes you over the boundary. This is not guaranteed, so the best approach is still to aim for a buffer above the boundary through your preparation.

Frequently Asked Questions About IGCSE Grade Boundaries

When are the 2026 IGCSE grade boundaries released?

Grade boundaries for the May/June 2026 series are typically released in August 2026, alongside results. The October/November 2026 boundaries are released in January 2027. Cambridge publishes them on their website as downloadable PDFs, usually within a few days of results day. Edexcel follows a similar timeline. Until then, you can only use past boundaries as a guide.

Can grade boundaries go down from one year to the next?

Yes, absolutely. If the exam paper is harder than usual, the board will lower the boundaries so that students are not unfairly penalised. This is one of the main reasons boundaries exist — to ensure fairness across different series. For example, if the May/June 2025 Maths A* boundary was 87%, the May/June 2026 boundary could drop to 83% if the paper was significantly more difficult. Conversely, an easier paper may push boundaries up.

What if I am just 1 mark below A*?

This is one of the most frustrating situations in exams. You have a few options:

1. Request a re-mark — If you believe your paper may have been marked incorrectly, you can request an Enquiry About Results (EAR) through your school. This costs a fee (usually £30–50 per component) which is refunded if your grade changes. Re-marks can go up or down.
2. Check component breakdown — Sometimes a mark change in one component can tip the overall total. Ask your school for a component-level breakdown.
3. Accept and move on — An A is still an excellent grade. For most university applications and career paths, an A is more than sufficient. If you are retaking, focus on the specific areas where you lost marks.

Prevention is the best cure: This is exactly why we recommend aiming for a buffer of 5–8% above the expected boundary in your practice papers.

Are grade boundaries the same for all variants?

No. Cambridge IGCSE papers often have multiple variants (e.g. Variant 1, Variant 2, Variant 3) for each series. Each variant has its own grade boundaries because the papers are different. However, the boundaries are set so that the same standard is required regardless of which variant you sit. In practice, differences between variants are usually small (1–3 marks).

Do predicted grades use grade boundaries?

Not directly. Your school predicts your grade based on your classwork, mock exams, and past paper performance — not on the actual grade boundaries (which are unknown until after the real exam). However, teachers often use past boundaries as a reference when making predictions. If you are consistently scoring above the typical A* threshold in practice, your teacher is likely to predict an A*.

How do grade boundaries work for the new Cambridge IGCSE syllabuses?

Cambridge periodically updates its syllabuses. When a new syllabus is examined for the first time, the boundaries may be slightly different from what students expect because there is no direct historical comparison. The board uses statistical methods and expert judgement to set fair boundaries. After two or three series with the new syllabus, boundaries typically stabilise into a predictable range. If your subject has a new syllabus for 2026, pay extra attention to the specimen paper and any sample boundaries Cambridge provides.

What percentage do I need for each grade?

While exact percentages vary by subject and series, here are rough guides for Cambridge IGCSE:

Grade	Typical Percentage Range
A*	80–90%
A	68–78%
B	58–68%
C	48–58%
D	38–48%
E	28–38%
F	20–28%
G	10–20%

These are approximate ranges based on historical data across multiple subjects. Some subjects (like Maths) tend towards the higher end, while others (like English) tend towards the lower end.

Tips to Maximise Your Marks and Beat the Boundaries

Whatever the grade boundaries turn out to be in 2026, these strategies will help you score as highly as possible:

1. Start past paper practice early — Begin at least 3–4 months before your exam. Do full papers under timed conditions.
2. Use the mark scheme religiously — The mark scheme tells you exactly what the examiner wants. Learn the keywords and required points for common questions.
3. Identify your weakest topics — Use a topic tracker to log which questions you get wrong. Focus your revision on these areas.
4. Master exam technique — Know how many marks each question is worth and write accordingly. A 4-mark question needs 4 distinct points.
5. Time management — Practice finishing papers within the time limit. Many students lose marks not because they do not know the content, but because they run out of time.
6. Review examiner reports — Cambridge publishes examiner reports that highlight common mistakes. Reading these can help you avoid pitfalls that other students fall into.
7. Get expert help for stubborn weak areas — If you have been stuck at the same mark for weeks, a tutor can often identify what is holding you back and fix it quickly.

Tutopiya Resources and Free Trial

At Tutopiya you can practice with auto-marked questions and past-paper style tasks so you know where you stand before results day. Our AI-powered resources bank — the biggest in the world for IGCSE and International A-Level — gives you access to revision notes, practice questions, and past paper solutions for all subjects at just SGD 8/month.

Our tutors help you target weak areas and build the marks that push you into the next grade. They can also help you interpret past boundaries and set realistic targets for your subjects.

Book a free trial with an IGCSE tutor to work towards your target grade, or explore Tutopiya’s AI-powered resources to start preparing today.

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