IB vs A Levels: Which Is Right for Your Child?

By Russell Greenhill

Founder & CEO @ Greenhill Academics

Oxford Master’s Graduate • 8+ Years Tutoring Experience

Most families choosing between the IB and A Levels in Year 9 or Year 10 are asking the wrong question first. The question is not which qualification is better — both are widely respected and both lead to strong university outcomes. The question is which one suits your child, based on how they learn, what they want to study, and where they want to go to university.

This post gives an honest account of what each route involves, where they differ in practice, and how to make a decision your child will not regret when they are in the middle of Year 12.

What the IB Diploma actually involves

The International Baccalaureate Diploma Programme is a two-year qualification sat at ages 16 to 18. Students study six subjects simultaneously — three at Higher Level (HL) and three at Standard Level (SL) — drawn from six subject groups: Language and Literature, Language Acquisition, Individuals and Societies, Sciences, Mathematics, and the Arts. Every IB student studies subjects from each group, which means no student can opt out of humanities, sciences, or a second language entirely.

On top of the six subjects, the IB requires three core components: Theory of Knowledge (TOK), an Extended Essay of 4,000 words on a topic of the student’s choice, and Creativity, Activity, Service (CAS), a programme of extracurricular engagement. These components are not optional extras — they are assessed and contribute to the final diploma score. The full IB Diploma is scored out of 45.

The IB workload

The IB is a significant workload commitment. Students are studying six subjects at all times alongside the core components, which means there is no quieter period in the way that dropping to three A Levels provides. Students who struggle with time management, who are easily overwhelmed by breadth, or who want to focus their energy on one or two subjects they love often find the IB more stressful than rewarding. Students who enjoy variety, who are academically confident across multiple disciplines, and who like the structure of a broad programme tend to find it stimulating.

What A Levels actually involve

A Levels are taken in three or four subjects studied in depth over two years. Most students take three A Levels, though four is common among students targeting highly competitive universities. The depth of content in each A Level is significantly greater than GCSE — the jump from Year 11 to Year 12 is substantial — and the assessment is almost entirely through end-of-year examinations at the end of Year 13.

There are no required subjects. A student who wants to study only sciences can take Chemistry, Biology, and Physics. A student interested only in humanities can take History, English, and Politics. This freedom is the defining feature of A Levels compared to the IB, and it is the right choice for any student who has a clear sense of direction and wants to go deep in a specific area rather than maintain breadth.

The A Level workload

A Levels involve a heavy end-of-course examination load — most A Level results rest entirely on exams sat in May and June of Year 13 — which means the pressure is concentrated rather than sustained. Students who work best under clear deadlines and who prefer mastering fewer subjects often find this structure suits them. The risk is that two years of work rests on a relatively small number of papers, which creates significant pressure for some students in the exam period.

How universities view IB vs A Levels

UK universities accept both qualifications and are experienced at converting between them. A typical offer from a Russell Group university might be AAA at A Level or 36 points in the IB Diploma, both representing a broadly equivalent standard. Oxbridge and other highly selective programmes make offers in both formats and do not systematically prefer one over the other.

For students planning to apply to universities outside the UK — particularly in the US, Canada, the Netherlands, and parts of Asia — the IB has a practical advantage. It is internationally recognised and understood, whereas A Levels require individual universities to assess equivalency. Students with genuine plans to study abroad will find the IB opens more doors with less administrative friction.

For students targeting Oxbridge or specialist UK programmes — Medicine, Law, Engineering — A Levels remain the more common route and the one admissions processes are most familiar with. A student applying to read Medicine at Cambridge with Chemistry A Level is on well-trodden ground. A student applying with IB Chemistry HL is equally eligible but needs to confirm their specific subject at HL meets each school’s entry requirements.

Subject-by-subject: how the content compares

IB Maths AA HL is broadly comparable to A Level Maths and Further Maths in depth and is recognised as such by most universities. IB Maths AA SL is roughly equivalent to A Level Maths. IB Sciences at HL are broadly equivalent to A Level sciences, though the internal assessment component and the emphasis on experimental design differ from the A Level practical endorsement. IB English Literature HL is a demanding course that is well-regarded by English departments.

The IB’s requirement to study mathematics and a second language means some students end up studying subjects at IB that they would not have chosen at A Level — and in some cases struggling with compulsory content that does not suit their strengths. This is worth thinking about honestly. A student who is weak at mathematics and passionate about humanities may find the IB Maths requirement a persistent source of stress that does not exist in the A Level route.

Which should your child choose?

Choose the IB if your child enjoys variety, is confident across multiple subjects, has strong time management skills, and is open to studying abroad or at international universities. The Extended Essay and Theory of Knowledge components suit students who like independent, reflective work.

Choose A Levels if your child knows broadly what they want to study, prefers depth over breadth, has one or two subjects they want to pursue seriously, or is targeting UK universities with specific A Level requirements — particularly Medicine, which almost universally requires Chemistry A Level. A Levels also suit students who find sustained broad workload stressful and perform better under focused, intensive preparation.

If your child is genuinely undecided between the two, the practical question is which subjects they would be forced to take in the IB that they would not choose at A Level — and whether those subjects are likely to be a source of strength or stress across two full years of study.

The one thing most guides get wrong

Most IB vs A Level comparisons focus heavily on which qualification is more prestigious or which produces better university outcomes. The honest answer is that both lead to excellent universities when the student performs well — and that a student who is mismatched with their qualification rarely performs well regardless of its theoretical prestige.

The most important factor is fit. A student who chooses the IB because it sounds impressive but resents the compulsory breadth throughout Year 12 and Year 13 is less likely to produce the grades that make the qualification worth choosing. A student who chooses A Levels because it feels like less work but then coasts through three subjects without depth is in the same position. The qualification is only as good as the performance it enables — and performance comes from engagement, which comes from choosing the right route for the right student.

Frequently asked questions