MRCEM is the membership route into emergency medicine, and its written components — the Primary and the Intermediate SBA — both sit at around a 50% pass rate, which places them among the harder postgraduate written exams. As with most membership exams, the standard is fixed rather than competitive, so the figure reflects how demanding the content is, not a quota. This guide covers the typical pass rates, what makes each part hard, and how to prepare efficiently. Figures are indicative as of mid-2026 — confirm current rates with the Royal College of Emergency Medicine.
What are the MRCEM pass rates?
Both written parts are demanding. The MRCEM Primary — a three-hour paper of 180 best-of-five questions covering the basic sciences underpinning emergency medicine — typically has a pass rate around 50%. The Primary in particular surprises people: the science is examined in more detail than the day-to-day clinical work of an emergency department requires, so even strong clinicians can find it stretching if they have not revised the underpinning anatomy, physiology and pharmacology specifically. The Intermediate SBA, which moves into applied clinical practice with 180 single-best-answer questions delivered across two papers, tends to sit in a similar 45 to 50% range. In other words, roughly half of candidates clear each written hurdle at a given sitting, and resits are common rather than shameful. It is also worth keeping the figure in perspective: a 50% sitting pass rate does not mean a 50% chance of ever passing, because most candidates who fail a part go on to pass it on a later attempt once they have closed their specific gaps. The exam is a hurdle to clear with preparation, not a lottery.
How the exams are structured
The written route has changed in recent years, so check the current rules before booking. Eligibility and the exam structure were updated from 2025, and there is a cap on the number of attempts. The Primary tests anatomy, physiology, pharmacology and related sciences as they apply to emergency presentations; the Intermediate SBA tests clinical decision-making across the breadth of emergency medicine, including resuscitation, acute presentations and the management of common and dangerous conditions. The standard for each is set to reflect the competence expected at that stage of training rather than to pass a set proportion of candidates. That criterion-referenced standard is an important point of reassurance: you are measured against a defined level of competence, not ranked against the other people in the room, so a strong cohort does not make it harder for you and a weak one does not make it easier.
Why MRCEM is hard
The Primary's difficulty is the basic-science depth: it asks for a level of anatomy, physiology and pharmacology detail that many candidates have not revisited since medical school, applied to emergency scenarios. The Intermediate's difficulty is breadth and judgement under time pressure: emergency medicine spans every body system and every age group, and the questions reward safe prioritisation — recognising the sick patient and the time-critical action — over exhaustive recall. This makes the Intermediate feel closer to real emergency practice than a pure knowledge test, but it also means that candidates who revise only facts, without practising prioritisation under time pressure, can be caught out despite knowing the material. Both papers are long, and pacing across 180 questions is a genuine factor. There is also the challenge of revising two quite different bodies of knowledge: the Primary's basic sciences and the Intermediate's applied clinical practice reward different study methods, and candidates who use the same approach for both often find one part harder than it needed to be.
How to give yourself the best chance
The candidates who pass efficiently tend to match their method to the part. For the Primary, they drill the basic sciences systematically and repeatedly, using spaced repetition to keep anatomy and pharmacology fresh rather than cramming. For the Intermediate, they practise applied scenarios under timed conditions and focus on safe management pathways. In both, they treat each wrong answer as a signal — identifying the underlying gap rather than simply re-reading the explanation.
A bank that adapts to your weak areas suits this well, concentrating your revision on the topics that are actually costing you marks. iatroX offers an adaptive engine that targets your weakest areas, a Socratic tutor that rebuilds the reasoning behind each answer, spaced repetition for the high-volume factual content, and blueprint-mapped questions. Its MRCEM bank is free, with no subscription, so you can run it daily throughout your preparation for either part. Because the bank is free, the sensible structure is to do the bulk of your revision on it across the months beforehand, and to spend any budget on full-length timed mocks in the run-up, where exam-day pacing and stamina are built. For a long, broad exam like MRCEM, that steady daily groundwork tends to matter more than any single intensive course.
A few common questions
What is the MRCEM pass rate? Both written parts typically sit around 50% — the Primary around 50%, and the Intermediate SBA in the region of 45 to 50% at a given sitting.
Which part is harder? The harder part depends on your background: the Primary is harder for those rusty on basic sciences, the Intermediate for those less comfortable with broad clinical decision-making under time pressure. Many candidates find one part straightforward and the other a real test, so it helps to work out which is which early and weight your revision accordingly.
How many attempts do I get? There is a cap on attempts and the rules were updated from 2025, so check the current Royal College of Emergency Medicine guidance before booking.
Is the pass mark a fixed percentage? No — like other membership exams, the standard is set to reflect the competence expected at that stage, and it is criterion-referenced rather than ranked. That means consistent, targeted preparation is the reliable route through, regardless of how any particular cohort performs.
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