IB vs A-Levels: A Parent's Comparison Guide

If your child is finishing their GCSEs or IGCSEs, you're facing one of the biggest school decisions of their life: IB vs A-Levels. Both are two-year courses for ages 16 to 18. Both are respected by top universities worldwide. But they are built on opposite ideas. The IB Diploma keeps your child broad — six subjects plus a core of extra work. A-Levels let your child go narrow and deep — usually just three subjects. This guide compares the two side by side, in plain English, so you can pick the right path for your child.

Quick answer: The IB Diploma Programme (IB DP) and A-Levels are both pre-university courses for students aged 16–18. The IB requires six subjects (including maths, science, and a language) plus a core of three extra components, and is scored out of 45 points. A-Levels involve just three subjects (sometimes four), chosen freely, each graded A* to E. Universities in the UK and worldwide accept both equally. The IB suits all-rounders who can handle a heavy, organised workload. A-Levels suit students who already know their strengths and want to specialise early.

What are A-Levels?

A-Levels are subject-based qualifications taken over two years, usually in three subjects, by students aged 16 to 18. The name is short for "Advanced Levels". They are the traditional route to university in England, Wales, and Northern Ireland — and a popular option at international schools through Cambridge International and Pearson Edexcel.

Here's what makes A-Levels distinctive. There are no compulsory subjects. None. Your child could take Maths, Physics, and Chemistry and never write another essay. Or take History, English, and French and never touch an equation again. Around 80 subjects exist across the exam boards, and students pick whichever three they like (schools may set some limits).

Since the 2015 reforms in England, A-Levels are "linear". That means everything rides on final exams at the end of Year 13. There are no modules along the way that count toward the grade. AS Levels still exist, but they're now standalone qualifications — they no longer count toward the final A-Level grade in England.

International schools usually offer the international versions. Cambridge International AS & A Levels are taught in around 10,000 schools across 160 countries. A common pattern abroad: students take four subjects at AS Level in the first year, then carry three of them through to the full A Level.

What is the IB Diploma?

The IB Diploma Programme is a two-year, all-round curriculum where students study six subjects at once, plus a compulsory core, and earn a single score out of 45 points. It's run by the International Baccalaureate, a non-profit foundation, and taught in thousands of schools worldwide.

The six subjects aren't a free pick. Your child chooses one from each subject group: their own language and literature, a second language, a humanities subject, a science, mathematics, and either an arts subject or a second choice from another group. You can see the full menu in our guide to IB subjects by group. Three (sometimes four) subjects are taken at Higher Level (HL, 240 teaching hours) and the rest at Standard Level (SL, 150 hours).

Then comes the core — the part A-Levels simply don't have:

• Theory of Knowledge (TOK) — a course about how we know what we know, assessed by a 1,600-word essay and an exhibition.

• Extended Essay (EE) — a 4,000-word independent research paper on a topic your child chooses.

• CAS (Creativity, Activity, Service) — an 18-month programme of activities outside the classroom. It isn't graded, but it's required.

Each subject is graded 1 to 7. Six subjects make a maximum of 42 points, and TOK plus the EE can add up to 3 bonus points. That's how the famous 45 comes together — our IB points system guide breaks it down in full.

IB vs A-Levels at a glance

Here's the whole comparison in one table.

The real difference: breadth vs depth

The core difference is simple: the IB forces breadth, while A-Levels reward depth. Everything else flows from this one design choice.

An IB student cannot drop maths. They cannot drop languages. They cannot drop essay subjects. For a genuine all-rounder, that's a gift — they stay strong across the board and keep every university door open. For a student who has hated maths since Year 7, it's two more years of a subject they'd rather leave behind.

An A-Level student studies their three subjects in real depth. A-Level Maths goes further into calculus than IB Maths SL does. A-Level History demands longer, more developed essays than most IB History papers. If your child already knows they want engineering, taking Maths, Further Maths, and Physics gives them a running start that IB breadth can't quite match.

There's a trade-off hiding here, though. Specialising at 16 means deciding at 16. A student who takes three sciences and then discovers a love of economics at 17 has a problem. An IB student in the same spot simply leans into their economics HL. If your child is still deciding who they are — and most 16-year-olds are — breadth is a safety net.

One more difference matters day to day: assessment style. Most IB subjects include an Internal Assessment (IA) — coursework marked by teachers and checked by the IB — worth roughly 20–30% of the subject grade. Modern A-Levels are almost entirely exam-based. A student who performs well under continuous, spread-out work will like the IB's rhythm. A student who peaks in exam season may prefer A-Levels' single final push.

How the grading compares

IB subjects are graded 1–7 and add up to a maximum of 45 points, while each A-Level is graded separately from A* down to E. There's no single official conversion, but UCAS — the UK's university admissions service — gives both a points value, which makes a rough comparison possible.

Notice the headline: an HL 7 carries the same UCAS weight as an A* at A-Level — 56 points. That's the fairest single-grade comparison there is.

Now the totals. Three A* grades at A-Level earn 168 UCAS points. A full 45-point IB Diploma earns 276 UCAS points — three HL 7s (168) plus three SL 7s (84) plus top grades in TOK and the EE (24). The IB student simply does more graded work, so the ceiling is higher. But be careful with this number: most universities set IB offers in IB points (like "38 points"), not UCAS points, so the 276 figure matters less than it looks.

How hard is it to reach the top? The numbers say: very. In the May 2025 session, the worldwide average IB score was 30.58 out of 45, and 81.26% of students earned the diploma. At A-Level in England in 2025, 9.4% of entries scored an A*, 28.2% scored A* or A, and 97.4% passed with A*–E. Grades of 43+ in the IB are rarer than three A*s at A-Level — both are excellent; neither is common.

Which do universities prefer?

Universities in the UK, the US, and worldwide accept the IB and A-Levels equally — neither qualification gives an automatic advantage. What matters is the grades, the subject fit, and the rest of the application.

Look at actual offers and you'll see the parallel clearly. For its most competitive courses, Cambridge typically asks for A*A*A at A-Level or 40–42 IB points with 7,7,6 at Higher Level. Oxford's typical range is A*A*A to AAA, or 38–40 IB points with 6s and 7s at HL. Same bar, two currencies.

A few honest nuances:

• Subject requirements bite harder than totals. A medicine offer needs Chemistry — at HL for IB students, at A-Level for the rest. An engineering offer needs strong maths. Check the course page, not just the points.

• US universities like the IB's shape. The IB's breadth mirrors the US high-school model, and strong HL results can earn college credit — similar to how AP courses work in the US system. A-Levels earn credit at many US universities too.

• Admissions tests don't care. Oxbridge and medicine applicants sit the same admissions tests and interviews whichever qualification they hold.

So drop the myth that one route "looks better". Admissions teams publish parallel offers for both. Your child should pick the system they'll score higher in — that's the real advantage.

Workload: the honest comparison

The IB carries a heavier and more constant workload than A-Levels — that's not a myth, it's the design. Six subjects plus TOK, a 4,000-word Extended Essay, and CAS commitments simply take more hours than three subjects with no core.

But "heavier" isn't the same as "harder for your child". The load lands differently:

• The IB load is wide and steady. Six subjects' homework, IA deadlines spread across two years, EE drafts, CAS reflections. It rewards organisation above raw brilliance. Students who use planners thrive. Students who cram, struggle.

• The A-Level load is narrow and spiky. Fewer contact hours, more free periods, and long stretches that feel manageable — then everything converges on one final exam season. It rewards depth, self-discipline, and exam temperament.

A rough rule from our tutoring work: the IB student's hardest term is constant (there's always a deadline), while the A-Level student's hardest term is the last one. Ask which pressure pattern suits your child better. A strong mathematician who wants depth without six-subject juggling often does their best work in A-Level Maths and Further Maths — the same student in the IB should look at Maths AA at Higher Level to get a comparable challenge.

Where each is offered (and what that means for you)

A-Levels dominate in the UK, while the IB is the more common pick at international schools — so your real choice may depend on where you live. In the UK, nearly every sixth form offers A-Levels, and only a minority of schools (many of them private) offer the IB. Internationally it flips: the IB Diploma is taught in thousands of schools worldwide, and Cambridge International A Levels reach about 160 countries, often in British-curriculum schools.

Three practical points for parents:

• Moving countries mid-course is easier with the IB. It's one global programme with one syllabus. A-Level boards and subject options vary school to school.

• Coming from IGCSE, both routes are natural. IGCSE students transition smoothly into either — the IGCSE to IB transition has its own quirks, mainly the step up in independence and the new core components.

• School quality beats programme choice. A school that teaches A-Levels brilliantly is a better bet than one that offers the IB half-heartedly, and the reverse is just as true. Visit, ask for recent results, and ask how many students they've taken through the programme.

Five questions to ask before deciding

The fastest way to cut through this decision is to ask five concrete questions — about your child, not about the programmes.

1. Would dropping maths (or languages) at 16 be a relief or a loss? A relief points to A-Levels. A loss — or a shrug — points to the IB.

2. Does your child know what they want to study at university? A firm yes favours A-Levels in the matching subjects. A no, or a maybe, favours the IB's open doors.

3. How does your child handle deadlines? Steady planners suit the IB's rolling coursework. Big-match performers suit A-Levels' final exams.

4. Might your family move countries before Year 13 ends? If yes, the IB's one-global-syllabus design is a real safety feature.

5. Which programme does the school actually teach well? Ask for the last three years of results in the subjects your child will take. A strong department beats a strong brochure.

Write the answers down. In our experience, four of the five usually point the same way — and that's your answer. If they split, the tiebreak question is number 3. Workload style is where mismatched students feel the pain first, usually by the second term of Year 12.

So which should your child choose?

Choose the IB if your child is an organised all-rounder who wants to keep options open; choose A-Levels if your child has clear strengths and wants to go deep into them. That's the honest one-line answer. Here's the longer checklist.

The IB is likely the better fit if your child:

• Is genuinely strong (or at least willing) across maths, languages, and essay subjects

• Hasn't decided on a university course or career yet

• Is organised and works steadily rather than in bursts

• May apply to universities in more than one country

• Would enjoy independent research (the EE) rather than dread it

A-Levels are likely the better fit if your child:

• Already knows their target course — especially medicine, engineering, law, or maths-heavy degrees

• Has a clear gap between strong and weak subjects

• Wants to drop maths, languages, or essays entirely

• Performs best when focused on fewer things

• Prefers final exams over continuous coursework

And a reassurance worth repeating: there is no wrong answer here. Both routes lead to the same universities. A child who picks the system that matches their working style will outperform the same child forced into the "prestigious" choice.

Educifly's specialist tutors have taught IB and IGCSE students 1-on-1 since 2018 — 500+ students, with an average grade-band lift of 1.4. If your child is weighing this choice, or has already started and needs subject support, a free trial class is an easy first step.

FAQs: IB vs A-Levels

Is the IB harder than A-Levels?

The IB has a heavier total workload — six subjects plus TOK, a 4,000-word Extended Essay, and CAS, against three A-Level subjects with no core. But individual A-Level subjects often go deeper than IB Standard Level. So the IB is harder to juggle, while a tough A-Level combination can be harder subject-for-subject. It depends on whether your child struggles more with volume or with depth.

Do universities prefer IB or A-Levels?

Neither. UK and international universities publish parallel offers for both — for example, A*A*A at A-Level alongside 40–42 IB points at Cambridge. Admissions teams care about grades, subject fit, and the overall application, not which system produced them. Your child should pick the qualification they'll score better in.

What is the IB equivalent of 3 A*s at A-Level?

Roughly 43–45 IB points. In UCAS terms, one Higher Level 7 equals one A* (56 points each). Three A*s earn 168 UCAS points; a full 45-point diploma earns 276 because it includes six graded subjects plus core points. In practice, universities treat an IB score of about 40+ as equivalent to top A-Level grades.

How many subjects do you take in IB vs A-Levels?

IB students take six subjects — one from each subject group, three or four at Higher Level — plus the core (TOK, Extended Essay, CAS). A-Level students usually take three subjects, sometimes four, with completely free choice and no compulsory extras.

Can you do the IB with A-Levels?

No. They're separate, full-time programmes, and schools run one or the other (some offer both tracks and ask students to choose). A small number of schools offer IB courses as standalone certificates alongside other qualifications, but the full diploma is a complete package on its own.

Is IB maths compulsory?

Yes. Every IB Diploma student must take mathematics — either Analysis and Approaches (AA) or Applications and Interpretation (AI), at Standard or Higher Level. At A-Level, maths is entirely optional. If your child wants to drop maths at 16, A-Levels are the only route that allows it.

Do US universities accept A-Levels?

Yes. Over 500 US universities and colleges accept Cambridge International A Levels, including all the Ivy League. Strong A-Level (and IB Higher Level) grades can also earn college credit, letting students skip some first-year courses. Both qualifications are fully valid for US applications.

How is the IB graded compared to A-Levels?

Each IB subject is graded 1–7, and the diploma totals a maximum of 45 points: 42 from six subjects plus up to 3 bonus points from TOK and the Extended Essay. Each A-Level is graded separately from A* to E, with U as a fail. There's no combined A-Level score — universities read the three grades individually.

What percentage of students get 45 in IB vs A* at A-Level?

Both are rare. Fewer than 1% of IB students worldwide score the full 45 points, and the May 2025 global average was 30.58. At A-Level in England in 2025, 9.4% of entries earned an A* — but that's per subject, and only a small fraction of students earn A*s across all three.

Is the IB more expensive than A-Levels?

Often, yes — but the cost comes from the school, not the qualification. IB schools tend to be private or international schools with higher fees, and the IB charges schools annual and per-student fees that get passed on. In the UK state sector, both are free where offered; A-Levels are simply available in far more state schools.

Which is better for medicine — IB or A-Levels?

Both work, and medical schools publish requirements for each — typically Chemistry plus Biology at A-Level (A*AA around the top schools), or 38–42 IB points with Chemistry and usually Biology at Higher Level. A-Levels let a future medic focus purely on sciences; the IB adds breadth that some medical schools say helps with the people side of medicine. Check each medical school's page — subject requirements differ.

Can my child switch from IB to A-Levels (or back)?

Switching is possible early in Year 12, and some students do move in the first term if the fit is clearly wrong. After that it gets hard — the courses cover different content in a different order, so a late switcher effectively restarts. It's far better to choose carefully upfront, using an honest read of your child's strengths, than to plan on switching later.