USMLE Attempt Limits, Waiting Periods and Retakes

You can attempt each USMLE Step a total of 4 times. Within that, you may not take the same exam more than three times in any 12-month period, and a fourth attempt has additional timing rules. If you pass a Step, you generally cannot retake it. This page summarizes the rules as reviewed in November 2026; the current Bulletin is the final authority.

The rules at a glance #

What counts as an attempt #

The Bulletin's eligibility page says incomplete attempts count toward the four-attempt limit and toward the timing rule for a fourth attempt. Attempts at the former Step 2 Clinical Skills also count toward the limit. The Common Questions page separately says you must report test-day problems, including not completing the exam for any reason, within 10 days of the test date. Read the current Bulletin definition of an attempt before you register, and do not assume that walking out of a session is without consequence.

Waiting periods #

The sources reviewed describe two timing rules: the three-attempts-in-12-months limit and the fourth-attempt rule above. The Common Questions page did not state any other minimum waiting period between earlier attempts, and secondary sites quote a figure that we could not confirm on the official pages. Practically, your next attempt also depends on the registration process, the eligibility period, scheduling availability and receipt of your score report, which can take weeks. See scheduling with Prometric.

Retaking a passed Step #

You are not allowed to retake a Step you have passed, except to meet a time limit set by a US medical licensing authority or another recognized authority, in cases the Bulletin lists. Those exceptions require the sponsoring authority to confirm eligibility and that the time limit has expired. A separate exception applies to some US medical students expected to graduate at least six years after passing Step 1 or Step 2.

Two consequences matter for IMGs:

• You cannot improve a passing Step 2 CK score by retaking it.
• If you retake Step 1 or Step 2 CK for such a reason and fail, you will no longer be eligible for Step 3.

Why attempt limits matter for residency #

Each attempt appears on your record, and programs see the history. See how programs screen applications. Repeated failure also uses up limited attempts, extra fees and calendar time. For the budget impact, see total cost of matching.

How to protect your attempts #

1. Do not book on hope. Use self-assessments to confirm readiness. See NBME self-assessments.
2. Schedule with slack, so you can move the date rather than sit an unprepared exam. Note the fee for changes inside 45 days.
3. Know the cost of a failure in time as well as money.
4. Plan the order of exams to limit risk. See when to take each Step.
5. Have a recovery plan before you need it. See what to do after failing a Step.

Common misunderstandings #

• "Six attempts": outdated since July 2021.
• "I can retake to improve a pass": not allowed.
• "The limit is overall, not per Step": the limit is per Step, but four failed attempts at any Step make you ineligible to apply for any Step.