When Should You Start Revising for IGCSEs?

The best time to start revising for your IGCSEs depends on how much of the syllabus you have covered, how many subjects you take, where your weak areas are and how far away your first exam is. There is no official Cambridge rule saying every student should begin revision three months, six months or any other fixed amount of time before their exams. Starting earlier usually gives you more room to revisit topics and fix weaknesses, but the useful question is not "What month should everyone start?"

It is: What should I be doing with the time I have left?

A student six months away from their first exam needs a very different revision plan from someone with six weeks remaining.

Start by working backwards from your first exam

Before making a revision plan, find the actual dates of your papers. Cambridge learner guidance encourages students to find out when their examinations are and plan revision around them. Cambridge also provides revision planners and checklists designed to help students organise and monitor their preparation.

Once you know your exam dates, look at your current position. Ask yourself:

• Which subjects are already strong?
• Which topics do you understand in class but struggle to answer in exam questions?
• Which parts of the syllabus have not been covered yet?
• How much time do school, homework and other commitments realistically leave each week?

Those answers are more useful than copying somebody else's revision start date.

If your exams are more than six months away

You probably do not need to behave as if exams are next week. This stage is better used for keeping earlier content alive and fixing foundational gaps as they appear. After finishing a topic at school, return to it briefly. Test whether you can recall the important ideas without your notes. Try a few relevant exam questions. If a concept never made sense the first time, fix it before later topics begin building on it. The aim is not to complete endless full past papers. It is to reach the later stages of revision without feeling as though you have to relearn the entire course from the beginning.

If your exams are three to four months away

This is a useful point to make revision much more structured. Create a clear overview of every subject and its topics. Separate them into areas you are confident in, areas that need some work and areas that are genuine weaknesses, then allocate your time accordingly. Do not spend most of your revision repeatedly covering the topics you already enjoy because they feel productive. For weaker areas, combine content review with exam-style questions. For stronger areas, use retrieval and practice to make sure the knowledge stays accessible. At this stage, exam questions should become an increasingly important part of revision. You are moving away from simply asking "Do I know this?" and toward "Can I use what I know to answer the question Cambridge actually asks?"

If your exams are six to eight weeks away

With six to eight weeks remaining, revision should normally become more exam-focused. You still need to repair gaps in your knowledge, but there is less value in spending hours making perfect notes from the beginning of the course. Use your time to identify weaknesses quickly and act on them. Past-paper questions can help you find those weaknesses. Cambridge says past papers help learners become familiar with exam requirements and command words, while mark schemes help students understand how answers are assessed. Start mixing targeted topic practice with complete papers or paper sections. As your understanding becomes stronger, introduce timed practice so that you are testing not only what you know but whether you can use it under examination conditions.

What if you are starting revision very late?

Starting late changes your priorities. It does not make revision pointless. If your first exam is only a few weeks away, trying to build the perfect collection of notes for every subject can consume the time you actually need for learning and practice. Start by finding out what you cannot do. Use your syllabus, recent school assessments and exam questions to identify the topics and skills costing you the most marks, then prioritise them. A weak topic that appears throughout a subject deserves attention. A small detail you already understand reasonably well probably does not need an hour of rewriting. Use active testing rather than repeatedly reading material: attempt questions, mark them, find the reason for each mistake, return to the weak content, then test yourself again. The shorter your remaining revision window becomes, the more deliberate your choices need to be.

When should you start doing past papers?

There is no single date when every student should suddenly switch from "revision" to "past papers." Past-paper practice can begin in smaller forms much earlier. While learning the course, use topical questions on subjects you have already covered. Once most of the syllabus is familiar, begin using larger paper sections and full papers. As exams approach, increase the amount of timed, exam-condition practice. The important part is readiness. A full paper is less useful if half of it covers content your class has not studied yet. But waiting until the final week to see a complete paper for the first time creates a different problem. Build toward full papers rather than treating them as something that either happens or does not.

What should a realistic revision week look like?

A useful week mixes different types of study. Suppose your current priorities are Biology, Mathematics and Business. One evening might involve revisiting a weak Biology topic and completing topical questions. Another could involve Mathematics problem solving followed by correction of the questions you got wrong. Later in the week, you might complete part of a Business paper and compare the answer with the mark scheme. The next week's plan should respond to what happened. If Mathematics is improving but Biology continues to expose the same weakness, Biology should probably receive more attention. Your timetable should change as your performance changes.

Is three months enough to revise for IGCSEs?

Three months can provide a substantial revision window, but whether it is enough depends on your starting point. A student who has followed the course consistently and mainly needs consolidation and exam practice is in a very different position from a student who has major gaps across several subjects. Do not spend time deciding whether three months is officially "enough." Audit what you know, divide the remaining time and start.

Is one month too late to start?

One month is much less flexible, but there is still useful work you can do. Prioritise major weaknesses and real exam questions. Avoid trying to make every resource perfect. Review mistakes deliberately and focus on the areas most likely to improve your performance with the time available. You cannot create more weeks, but you can improve how the remaining ones are used.

Should you revise for IGCSEs in Year 10?

You do not need to turn Year 10 into a permanent exam season. However, reviewing material as you learn it can make later revision significantly easier. Keeping older topics active, testing yourself occasionally and correcting gaps early means that your final revision period can focus more on exam performance and less on relearning forgotten content. Think of this stage as maintenance and consolidation, not intensive final revision.

There is no perfect date. There is a useful next step.

Searching for the ideal month to start revising can become another way of delaying revision. If your exams are far away, build understanding and keep earlier topics active. If you are a few months away, organise the syllabus and begin structured question practice. If you are weeks away, prioritise weak areas and increase timed exam practice. And if you feel late, start with the time you actually have rather than the time you wish you had. The most useful revision plan is one that keeps changing as your weaknesses change.

Let your plan change with your progress

Inside NeuraGeek, the AI Planner can build a study plan around your subjects, available study time, syllabus progress and weaker areas, then adjust what you should work on as your performance changes. In the example below, the Planner turns a three-day Physics deadline into topical MCQs, structured exam practice and a timed quiz simulation, while also updating the calendar.

Click to enlarge

Click to enlarge

Whether you plan it yourself or use a tool to help, the principle is the same: work backwards from the exam, identify what needs improvement, and make each week more targeted than the last.