Which A-Level subjects have the lowest pass rates?

Physics, Chemistry, and Computing post the lowest top-grade rates among mainstream A-Level subjects.

These subjects demand more than content knowledge. Physics requires students to translate real-world phenomena into mathematical models under timed pressure. Chemistry asks students to track invisible molecular behaviour across multiple conceptual frameworks at once. Computing presents a steep early syntax barrier, and a single misplaced character can cause an entire programme to fail.

The table below shows pass-rate baselines and the core difficulty factor for five of the most widely studied A-Level subjects.

These figures reflect overall pass rates. The gap widens sharply at the A and A* boundary, where the real competition sits.

Biology carries the largest raw content load of any science A-Level. Law sits closest to the pass threshold overall, but consistently records the lowest proportion of students reaching top grades. Knowing the law is not enough; students must apply it precisely to scenarios they have never seen before.

Effective revision for these A-Levels goes beyond re-reading notes. Reading official examiner reports before a revision topic, practising past papers under timed conditions, and self-marking with official criteria are the methods that move grades. Sleep also matters: eight hours a night supports memory consolidation in ways that extra revision hours do not replace.

Students taking Cambridge A-Levels or Edexcel qualifications in these subjects benefit from targeted support early in Year 12, before gaps become entrenched. If you want a full breakdown of revision strategies for each subject, our blog covers them in detail. To get matched with a subject-specialist tutor through online tutoring, contact us and you can be paired in under ten minutes.