IGCSE Additional Mathematics grade thresholds 2026: How they work and what they mean for you

Every year, thousands of students sit the Cambridge IGCSE Additional Mathematics (0606) examination and then spend weeks anxiously searching for one critical piece of information: The grade threshold. Understanding IGCSE Additional Mathematics grade thresholds is not just useful after the exam; it is one of the most powerful planning tools available to you before and during your revision.

At Times Edu, we have guided students through the IGCSE Additional Mathematics syllabus since 2018, and the question we hear most frequently is not “how do I solve this trigonometry problem?” It is “how many marks do I actually need?” This article answers that question in full, drawing on historical data, Cambridge’s grading methodology, and the strategic advice we give our own students every semester.

What are grade thresholds in IGCSE Additional Mathematics and how does Cambridge set them?

Grade thresholds are the minimum raw mark totals required to achieve each grade in a given exam session. For IGCSE Additional Mathematics (syllabus code 0606) ^[1], the grades awarded are A*, A, B, C, D, and E. Each grade has a specific cut-off score that is set after the exam has been sat, not before.

Cambridge uses a process called grade setting, which involves senior examiners reviewing student performance data across an entire cohort. The examiners identify the raw mark at which the quality of student work clearly meets the standard for each grade level. This means the thresholds are responsive to paper difficulty rather than being fixed percentages applied mechanically.

One critical detail often overlooked is that Cambridge does not publish thresholds in advance. The official Cambridge grade threshold document for each session is released alongside results, and it reflects the actual performance of all candidates who sat that specific paper variant. This is a fundamentally different system from fixed marking schemes, and misunderstanding it leads to poor target-setting.

>>> Read more: IGCSE Additional Mathematics examiner reports 2026: How to extract every useful insight

How IGCSE Additional Mathematics grade thresholds vary between exam sessions

The Cambridge 0606 grade boundaries are not static. They shift meaningfully from one session to the next, and the primary driver of that shift is paper difficulty. When Paper 1 or Paper 2 contains questions that prove harder than expected for the cohort, examiners lower the minimum mark required for each grade to maintain consistent standards across years.

IGCSE Additional Mathematics is offered in two main series: May/June and October/November. Some Cambridge centres also offer a March session, though this is less common and typically restricted to certain regions. The grade boundary for May/June and October/November sessions for the same syllabus can differ noticeably because the candidate pools and paper difficulty levels are independently calibrated.

A common mistake we see is students assuming that because a friend in a different session scored, say, 125 out of 160 and earned a B, they will also earn a B with 125. That assumption ignores the fact that thresholds differ by session and by paper variant. Always locate the threshold document that corresponds to your specific session and variant number.

>>> Read more: IGCSE Additional Mathematics examiner tips 2026: What markers want to see in your answers

IGCSE

How to Achieve an A* in Cambridge IGCSE

699.000đBuy →

IGCSE

IGCSE Additional Mathematics 0606 Study Guide

499.000đBuy →

Historical grade threshold data for IGCSE Additional Mathematics 0606

The total combined mark for the 0606 syllabus is 160 raw marks, derived from 80 marks on Paper 1 and 80 marks on Paper 2. The table below compiles minimum combined raw marks required for each grade across several recent June sessions, based on typical variant data.

Several patterns emerge from this historical grade boundaries 0606 data that are worth studying carefully.

The A* threshold Add Maths range: Across the sessions tracked, the A* cut-off sits between approximately 135 and 141 marks out of 160. Translated to per-paper performance, this means you need to average roughly 68 to 71 marks out of 80 on each paper to realistically target the top grade.

The B grade shift: Notice that the B grade threshold in June 2019 was 92, while in June 2025 it dropped to 87. A five-mark difference may seem small, but it reflects a measurable increase in paper difficulty and has a real impact on whether a borderline student passes into B territory or falls into C.

The E grade (pass mark): The IGCSE Add Maths pass mark, which is grade E, has historically sat around 33 to 44 marks depending on the session. For a 160-mark paper, this represents roughly a 20 to 28 percent raw score, which underscores how demanding the content is relative to standard IGCSE Mathematics.

One critical detail that often surprises families: The A grade does not exist at the component level. Cambridge does not award A for Paper 1 or Paper 2 individually. The A is determined solely from the combined total of both papers. This means a student who scores 80 out of 80 on Paper 1 but only 55 out of 80 on Paper 2 will have a combined score of 135, which may or may not clear the A threshold depending on the session.

>>> Read more: IGCSE Additional Mathematics exam technique 2026: The complete guide to scoring higher

How to use grade threshold information to set realistic score targets in IGCSE Add Maths

Drawing on years of experience at Times Edu working with IGCSE students across multiple Cambridge centres, the most effective revision strategy integrates grade threshold data directly into mock exam practice. Here is a concrete approach.

Step 1: Locate the correct threshold document. Visit the Cambridge International website and download the grade threshold PDF for the specific past paper you are using. Match the year, series (May/June or October/November), and variant number. Do not use a threshold from a different variant and assume it applies to yours.

Step 2: Complete a full timed mock under exam conditions. This means Paper 1 and Paper 2 on separate sittings, no notes, strictly timed at 2 hours per paper.

Step 3: Mark your papers accurately. Use the official mark scheme. Do not be generous with yourself on method marks; follow the mark scheme’s stated criteria precisely.

Step 4: Compare your combined total to the threshold document. Note which grade band your raw score falls into. This gives you a calibrated, honest snapshot of where you currently stand.

Step 5: Calculate your gap to target. If you are targeting A* and you scored 128 combined, your gap might be 9 to 13 marks depending on the session. Break that gap down: Which topics cost you the most marks? Allocate your remaining revision time proportionally.

A common mistake we see at this stage is students repeating past papers without reviewing thresholds. They celebrate scoring “90%” on a mock without realising that the raw mark equivalent of 90% (144 out of 160) is well above the A threshold in every recorded session, meaning they may be over-practising comfort zones and neglecting weak areas that sit just below the A boundary.

>>> Read more: IGCSE Additional Mathematics 0606 book 2026: Complete guide for students and parents

How grade thresholds in IGCSE Additional Mathematics compare to IGCSE Mathematics

A question parents frequently raise is how the 0606 vs 0580 thresholds compare, and what that signals about course difficulty and strategic subject selection.

IGCSE Mathematics (0580) is the standard qualification and uses a slightly different grading structure. It awards grades from A through G, with the C grade historically sitting around 40 to 50 percent of the total mark depending on the paper tier (Core or Extended). The A on 0580 Extended typically requires around 85 to 90 percent of the total mark in most sessions.

The key insight from the 0606 vs 0580 thresholds comparison is that the percentage required for an A* is broadly similar, but the content difficulty of 0606 is substantially higher. Students who attempt 0606 and score a grade B or above are demonstrating mathematical ability that is genuinely valued by selective universities and competitive A Level programmes.

In our experience working with international students building profiles for UK, US, and Australian university applications, an A or A* in IGCSE Additional Mathematics carries more weight as a signal of mathematical aptitude than the same grade in 0580. Students considering A Level Mathematics, A Level Further Mathematics, or the IB Mathematics: Analysis and Approaches (Higher Level) course should seriously consider 0606 as preparatory groundwork.

>>> Read more: IGCSE Additional Maths Study Plan 2026: A Week-by-Week Schedule for Tough Topics

Where to find official IGCSE Additional Mathematics grade threshold documents

The authoritative source for all Cambridge grade threshold documents is the Cambridge International website. The documents are published under the “Examination results” section and are searchable by syllabus code, session, and year.

Official Cambridge source: Search for “Cambridge IGCSE grade threshold documents” on the Cambridge International website (cambridgeinternational.org). Filter by syllabus code 0606 and select the relevant session.

Additional repositories: Many teachers and student communities maintain archives of past threshold PDFs. Reputable student portals such as XtremePapers and PapaCambridge often host these documents alongside mark schemes and past papers, though you should always cross-check against the official Cambridge source for accuracy.

One critical detail often overlooked is that Cambridge occasionally revises the presentation or grouping of threshold data when it updates a syllabus. If you are using materials from before 2020, confirm that the syllabus content and paper structure match the current version of 0606 before drawing conclusions from the thresholds.

When searching, use the exact terminology: “Cambridge grade threshold document 0606 May June [year]” or “Cambridge grade threshold document 0606 October November [year].” This phrasing will surface the correct PDF rather than general grade information pages.

>>> Read more: IGCSE Tutor 2026: How to Choose the Right One

Frequently asked questions

Conclusion

For students building profiles toward competitive A Level, IB, or university programmes, a strong result in IGCSE Additional Mathematics is a meaningful signal of mathematical readiness. At Times Edu, our 1-on-1 consultants work with students to build personalised revision plans that incorporate real grade threshold data, not guesswork. If you would like a tailored academic roadmap that accounts for your current performance level, your target institution, and the specific demands of the Cambridge 0606 syllabus, we invite you to book a consultation with our team. The right strategy, applied early, makes the difference between chasing a grade and confidently achieving it.

Cao Linh