There is no officially published percentage of questions you need to answer correctly to pass USMLE Step 1. The passing standard is a scaled score of 196 on a three-digit scale, but the USMLE does not translate that into a simple percent-correct cutoff. Since January 26, 2022, Step 1 results are reported as pass or fail only, with no numeric score on your transcript.
That said, most students preparing for the exam want a concrete number to aim for. Here’s what the scoring system actually looks like, what benchmarks are available, and how to gauge whether you’re ready.
Why There’s No Fixed Percentage
Step 1 uses a statistical process called equating to adjust for slight differences in difficulty between exam forms. Two students taking different versions of the test on different days aren’t answering identical questions, so raw percent correct doesn’t translate evenly across forms. Instead, the USMLE converts raw performance into a scaled score that accounts for these variations. A 196 on one form represents the same level of knowledge as a 196 on another, even if the raw number of correct answers differs slightly.
Unofficial estimates from test-prep communities have historically placed the passing threshold somewhere around 60 to 70 percent correct, but these are rough approximations. The USMLE has never confirmed a specific percentage, and the equating process means the real number shifts depending on which questions appear on your exam.
What Pass/Fail Means for You
Before 2022, Step 1 reported a three-digit score that residency programs used heavily to screen applicants. That created enormous pressure to score well above passing. Now, the only outcome on your record is “pass” or “fail.” The change was driven by concerns that numeric scoring was distorting medical education, pushing students toward board-prep at the expense of clinical learning and contributing to inequities in the residency match.
A pass still matters. State medical boards require it for licensure, and a fail on your record raises questions during residency applications. But the shift means your goal is clearance, not a high score. That changes how you should think about preparation.
Current Pass Rates
Most test-takers pass. According to USMLE performance data for 2025:
- US MD students: 91% passing rate
- US DO students: 89% passing rate
- International medical graduates: 72% passing rate
These numbers suggest that students at US medical schools who complete a standard preclinical curriculum are well-positioned to pass. The gap for international graduates reflects differences in curriculum alignment with the exam’s content, not differences in clinical ability.
How to Know If You’re Ready
Since you won’t get a numeric score on the real exam, practice assessments are the best tool for predicting your outcome. The NBME offers Comprehensive Basic Science Self-Assessments (CBSSAs) that generate an estimated probability of passing Step 1 within one week. That probability ranges from 1% to 99% and is based on statistical models built from large groups of students who took the practice exam shortly before the real thing.
The key benchmark: if your likely score range on a CBSSA falls completely above the “low-pass range,” you’re probably ready. The low-pass range represents scores that are above the passing standard but only by a thin margin. If your practice scores overlap with that zone, the NBME advises extra caution before scheduling your test date.
Keep in mind that even a 90% estimated probability of passing means 1 out of 10 students at that performance level will fail. Practice exams are predictive, not guarantees. Taking multiple CBSSAs over time also lets you track progress, since the scores are equated to account for difficulty differences between forms.
What the Exam Covers
Step 1 tests foundational science knowledge across a broad range of disciplines. The heaviest emphasis is on pathology, which makes up 45 to 55 percent of the exam. Physiology accounts for 30 to 40 percent, and pharmacology and microbiology each represent 10 to 20 percent. Smaller but significant portions cover biochemistry, immunology, anatomy, histology, behavioral sciences, and genetics.
Starting May 14, 2026, the exam format changes to fourteen 30-minute blocks with up to 20 questions per block, administered in a single 8-hour testing session. This is a shorter format than earlier versions of the test, which means each question carries slightly more weight relative to the total.
If You Don’t Pass
You can take Step 1 up to four times total. Within any 12-month period, you’re limited to three attempts. Your fourth attempt must be at least 12 months after your first attempt and at least six months after your most recent one. Each retake requires a new scheduling permit and registration.
A single failed attempt isn’t uncommon and doesn’t end a medical career, but multiple failures create significant barriers for both licensure and residency applications. If your practice scores suggest you’re close to the passing threshold, delaying the exam to study longer is almost always a better strategy than testing early and risking a fail on your record.