The FRCA Primary MCQ has one of the most consistent failure rates among UK postgraduate medical exams. Approximately 40 to 45 per cent of candidates fail at each sitting, and this figure has remained stable for years despite the removal of negative marking and the transition from MTF to SBA format.
The numbers
The RCoA publishes pass rates by sitting. The Primary MCQ typically sees 55 to 60 per cent of candidates pass. The pass rate is set using a modified Angoff method, calibrated to the standard expected of a trainee who has completed CT1–CT2 basic anaesthetic training.
Why candidates fail
Three patterns account for the majority of failures.
First, insufficient pharmacology revision. Pharmacology accounts for 40 per cent of the exam, yet many candidates allocate less than a third of their revision time to it. Drug mechanisms, pharmacokinetics, receptor pharmacology, and drug interactions require dedicated study that goes well beyond what you learn through clinical prescribing. If your revision plan does not give pharmacology proportional time, you are structurally underweighting the largest domain.
Second, neglecting physics and clinical measurement. This domain accounts for only 15 per cent of questions but is the area where candidates score lowest on average. Gas laws, vaporiser function, monitoring principles, and electrical safety are not covered in routine clinical training and require dedicated physics revision. Many candidates deprioritise physics because it feels less clinically relevant — but 15 per cent of the exam is 13 to 14 questions, and losing most of them significantly reduces your margin for error elsewhere.
Third, over-reliance on clinical experience at the expense of textbook knowledge. The FRCA Primary is a basic sciences exam. Your clinical anaesthetic experience gives you excellent clinical judgement but does not teach you the Henderson-Hasselbalch equation, the blood-gas partition coefficients of inhalational agents, or the anatomy of the brachial plexus at the level of detail the exam requires.
What the pass rate means for your preparation
A 55 to 60 per cent pass rate means you need to be in the top three-fifths of candidates, not just above average. The candidates who pass are those who treat the FRCA Primary as a dedicated academic exam requiring three to four months of structured revision, not those who assume clinical competence will carry them through.
iatroX's FRCA Primary bank contains over 1,500 SBA questions weighted to match the real exam — 40 per cent pharmacology, 30 per cent physiology, 15 per cent physics, 15 per cent anatomy. The adaptive algorithm ensures physics and anatomy receive proportional attention even if you naturally gravitate toward pharmacology. All included at £29 per month or £99 per year.