Complete Guide
IB to Oxbridge: Score Requirements & Application Guide 2027
How IB students should approach Oxford and Cambridge applications, including score requirements, predicted grades, and what to do differently from A-level applicants.
Around 15% of successful Oxford and Cambridge applicants study the International Baccalaureate rather than A-levels. Both universities actively welcome IB students and consider the diploma an excellent preparation for undergraduate study. However, the application process works slightly differently for IB candidates, and understanding these differences gives you a significant advantage.
This guide covers everything IB students need to know: score requirements by university and subject, how predicted grades work in the Oxbridge context, which Higher Level subjects to choose, and the specific challenges IB students face in interviews and admissions tests. Whether you are at a UK school offering the IB or applying from an international school abroad, the advice here applies.
IB Score Requirements: Oxford vs Cambridge
Oxford typically requires 38-40 points overall with 6s and 7s at Higher Level, depending on the course. The most competitive courses (Medicine, PPE, Computer Science) generally ask for 39-40 points with 7,7,6 or 7,6,6 at HL. Less competitive courses may accept 38 points with 6,6,6 at HL.
Cambridge requirements are similar but expressed differently. Most Cambridge courses ask for 40-42 points with 7,7,6 at Higher Level. Some science courses specify that particular HL subjects must be at 7 (for example, HL Mathematics for Engineering or HL Chemistry for Natural Sciences).
Imperial College London typically requires 38-40 points with 6,6,6 at HL. UCL requirements vary more widely by department, ranging from 34 to 40 points. Always check the specific course page for exact requirements, as they can change year to year.
Important: these are minimum thresholds, not targets. Competitive applicants typically exceed the published requirements. For Oxford Medicine, for example, most successful IB applicants score 41-43 points despite the official requirement of 39.
Choosing Your Higher Level Subjects
Your Higher Level subject choices matter more for Oxbridge applications than Standard Level choices. As a general rule, your HL subjects should include the subjects most relevant to the course you want to study. For sciences, this typically means HL Mathematics and at least one HL science. For humanities, HL English and HL History or another essay-based subject are strong choices.
Some specific requirements to note: Oxford Medicine requires HL Chemistry. Cambridge Engineering requires HL Mathematics (Analysis and Approaches). Oxford Mathematics requires HL Mathematics (Analysis and Approaches) at grade 7. If you are considering these courses, plan your HL choices from the start of Year 12 (or equivalent).
One advantage IB students have over A-level students: the breadth of the IB curriculum. You study six subjects plus TOK, EE, and CAS, which gives you a wider academic profile. Oxbridge admissions tutors value this breadth, particularly for interdisciplinary courses like PPE, Human Sciences, or Natural Sciences. Use your Extended Essay to demonstrate depth in your chosen subject.
How Predicted Grades Work for IB Students
UCAS applications are submitted with predicted grades, not final results. For IB students, your school will predict your total IB score and your individual HL and SL grades. Oxford and Cambridge use these predictions as part of their shortlisting process.
IB predicted grades tend to be more accurate than A-level predictions, which means Oxbridge takes them seriously. If your school predicts 40 points and the course requires 39, you are in a strong position on paper. However, predictions alone do not determine your outcome — admissions test scores and interview performance carry more weight.
If your school is known to Oxbridge (many IB schools have track records of sending students to Oxford and Cambridge), your predictions will be calibrated accordingly. If your school is less well-known, your admissions test performance becomes even more important as an independent measure of your ability.
The Extended Essay and CAS: How to Use Them
Your Extended Essay (EE) is a powerful asset in an Oxbridge application if you use it strategically. Write your EE in the subject you plan to study at university, or in a closely related field. The EE demonstrates exactly what Oxbridge tutors want to see: the ability to conduct independent research, form an argument, and engage with academic material at a level beyond the standard curriculum.
Mention your EE in your personal statement and be prepared to discuss it at interview. Interviewers may ask you about your methodology, your conclusions, or what you would do differently. A strong EE gives you a natural talking point that demonstrates genuine academic engagement.
CAS (Creativity, Activity, Service) is less directly relevant to Oxbridge applications than the EE, but it can provide useful material for the third UCAS question about activities outside formal education. Focus on CAS activities that connect to your subject: organising a science outreach event, starting a philosophy discussion group, or volunteering in a context relevant to your course.
IB-Specific Interview Preparation
IB students sometimes face a slight disadvantage at interview compared to A-level students because the IB curriculum covers topics more broadly but sometimes less deeply. For science interviews at Oxford, for example, A-level students may have covered certain topics in more detail because they study only three subjects.
The solution is targeted preparation. Identify the topics most likely to come up at interview for your subject and make sure you can discuss them at a level beyond the IB syllabus. For Mathematics, this might mean working through problems that require techniques beyond HL Maths. For English, it might mean reading literary criticism beyond what your IB course covers.
The good news: IB students often perform well at interview because the TOK component develops exactly the kind of critical thinking and argument analysis that Oxbridge interviewers value. Use your TOK training to your advantage: question assumptions, consider multiple perspectives, and be comfortable with ambiguity.