PLAB 1 pass rates are simultaneously the most searched and most misunderstood data point in IMG exam preparation. Candidates obsess over them, coaching centres quote them selectively, and forums debate them endlessly — usually without understanding what the numbers actually mean.
This analysis examines the published GMC data on PLAB 1 performance, identifies what the statistics genuinely reveal, and explains how to use them to calibrate your preparation.
The Headline Numbers
PLAB 1 pass rates have historically ranged between 55% and 75% depending on the sitting, with significant variation between individual exam dates. The GMC publishes pass rate data annually in its State of Medical Education and Practice report, with breakdowns by gender, country of qualification, and attempt number.
The MLA alignment in August 2024 introduced a new variable. Early post-alignment sittings showed pass rates at the lower end of the historical range, consistent with a transition to a new exam format and expanded content. This is a normal pattern — when exam style changes, the first cohort of candidates under the new format typically underperforms relative to steady-state levels.
Pass rates have since stabilised. The exam is not dramatically harder than the pre-MLA version — it is different. Candidates who prepared with MLA-aligned resources perform comparably to historical averages. Those who used pre-MLA resources performed worse, dragging the headline figure down.
What the Data Shows by Attempt Number
The most important statistical pattern in PLAB 1 data is the strong correlation between attempt number and pass rate. First-attempt candidates pass at higher rates than second-attempt candidates, who pass at higher rates than third-attempt candidates. This is not because the exam gets harder — it is the same exam. It is because the population of repeat candidates is self-selected for the factors that caused failure in the first place.
However, this pattern is not destiny. A significant proportion of candidates who fail on first attempt pass on second attempt, and the pass rate for second-attempt candidates is still substantial. The key differentiator is whether the candidate meaningfully changed their preparation strategy between attempts (as discussed in the retake strategy guide).
What the Data Shows by Country of Qualification
Pass rates vary significantly by country of primary medical qualification. This does not reflect inherent ability — it reflects the alignment between the candidate's medical training and UK clinical practice. Candidates from countries whose medical curriculum is more closely aligned with UK practice (similar guideline-based approach, similar disease prevalence, English-language training) tend to perform better on first attempt.
The practical implication: if your medical training was not UK-aligned, you need to invest more time specifically in UK guidelines, UK clinical practice conventions, and the NHS context. The clinical knowledge may be equivalent, but the specific management recommendations tested in PLAB 1 follow NICE, not international textbook recommendations.
iatroX is specifically designed to bridge this gap — every answer is grounded in NICE, CKS, SIGN, and BNF, the authoritative UK sources. Studying with iatroX builds UK-specific clinical knowledge regardless of where you trained.
What the Data Does Not Show
Pass rates do not tell you how hard the exam will be on your specific sitting date. The pass mark is standardised to adjust for variation in question difficulty between sittings — a harder paper has a lower pass mark, and vice versa. Your preparation level matters more than the specific sitting you choose.
Pass rates do not predict your individual probability of passing. Aggregate statistics describe populations, not individuals. A 65% pass rate does not mean you have a 65% chance of passing — your chance depends entirely on your preparation, your knowledge, and your exam technique. A well-prepared candidate's probability is much higher than the average; a poorly prepared candidate's is much lower.
How to Use This Data
Benchmark your mock exam scores. If PLAB 1 pass rates are approximately 60-70% and the pass mark is typically around 60-65%, scoring consistently above 65% on representative mock exams suggests you are well-positioned. Scoring below 55% suggests significant gaps remain.
Do not delay because of pass rate fears. Candidates who delay their exam date hoping for an "easier sitting" are wasting time. The standardisation process ensures equivalent difficulty across sittings. The best time to sit the exam is when your preparation is complete.
Focus on the factors you control. You cannot control the pass rate. You can control the quality and duration of your preparation, the resources you use, the number of mock exams you complete, and the specific weaknesses you address.
The Preparation That Predicts Success
The data consistently supports three predictors of PLAB 1 success: sufficient Q-bank practice (3,000+ questions from a combination of sources), multiple timed mock exams under realistic conditions (4-5 minimum), and UK-guideline-aligned preparation that teaches the reasoning behind management decisions.
iatroX Q-Bank provides the adaptive, guideline-grounded practice that the data suggests matters most. Free, MLA-mapped, and available immediately. Combine it with a primary paid Q-bank for volume, and you have the preparation profile that the statistics associate with passing.
The numbers are just numbers. Your preparation is the variable that matters.