- Step 1 caps out at 280 items across fourteen 30-minute blocks in one eight-hour session.
- The 2026 application fee is $695, plus a $210 testing-region fee outside the U.S. and Canada.
- Reproductive & Endocrine Systems is the single largest system domain at 12-16%.
- Passing is pass/fail only, tied to a standard equivalent to 196 on the old three-digit scale.
What This Cheat Sheet Covers
This is a compressed, one-page-style reference for United States Medical Licensing Examination Step 1 (USMLE Step 1) - the exact numbers, domain weights, and eligibility rules you need in the final stretch before test day. It is not a substitute for deep content review; pair it with a full USMLE Study Guide 2026: How to Pass on Your First Attempt if you haven't built a study plan yet. Think of this page as the sheet you glance at the night before your Prometric appointment to confirm you have the mechanics right: block structure, break minutes, fee amounts, and the domain percentages that should be steering your review time.
Exam Format at a Glance
For exams administered on or after May 14, 2026, Step 1 delivers up to 280 one-best-answer multiple-choice items spread across fourteen 30-minute blocks inside a single eight-hour session. Every question follows a single-best-answer format - no matching sets, no multi-select items. Break structure and tutorial time are fixed, so budgeting your pacing around them matters as much as knowing content.
| Format Element | Specification |
|---|---|
| Total items | Up to 280 |
| Blocks | 14 blocks, 30 minutes each |
| Session length | One 8-hour session |
| Break time | At least 55 minutes total |
| Tutorial | 5 minutes, optional |
| Question type | One-best-answer multiple choice only |
Because every block is timed independently, unused time within a block cannot roll over except into your overall break allotment depending on how you manage it. For a deeper breakdown of why this structure trips up otherwise well-prepared candidates, see How Hard Is the USMLE Exam? Complete Difficulty Guide 2026.
Registration & Fees Quick Reference
The 2026 application fee for Step 1 is $695. If you're testing outside the United States and Canada, add a $210 testing-region fee on top of that. There is no renewal cycle for Step 1 itself - it's a one-time exam within the broader licensing sequence, though individual licensing authorities set their own time limits for completing that sequence.
Key Takeaway
Budget for $695 minimum, and add $210 if you're scheduling a testing region outside the U.S. or Canada. Confirm exact totals before submitting your application, since fee schedules can be revised.
For a complete line-item breakdown of every cost associated with the licensing sequence, read USMLE Certification Cost 2026: Complete Pricing Breakdown. If you're unsure whether you even qualify to apply yet, check USMLE Requirements 2026: Eligibility, Prerequisites & How to Qualify before paying anything.
The 11 Content Domains, Ranked by Weight
Step 1 organizes content into 11 domains, each carrying a percentage range of the total exam. Knowing these ranges lets you allocate review hours proportionally instead of spreading effort evenly across topics that don't carry equal weight.
| Domain | Weight |
|---|---|
| Reproductive & Endocrine Systems | 12-16% |
| Respiratory & Renal/Urinary Systems | 11-15% |
| Behavioral Health & Nervous Systems/Special Senses | 10-14% |
| Blood & Lymphoreticular/Immune Systems | 9-13% |
| Musculoskeletal, Skin & Subcutaneous Tissue | 8-12% |
| Multisystem Processes & Disorders | 8-12% |
| Cardiovascular System | 7-11% |
| Gastrointestinal System | 6-10% |
| Social Sciences: Communication and Interpersonal Skills | 6-9% |
| Biostatistics & Epidemiology/Population Health | 4-6% |
| Human Development | 1-3% |
Reproductive & Endocrine Systems (12-16%)
This is the largest system allocation on the exam, so gaps here cost more than gaps anywhere else.
- Hormonal feedback loops and axis disorders
- Pregnancy, labor, and reproductive pathology
- Endocrine tumors and metabolic disease integration
Respiratory & Renal/Urinary Systems (11-15%)
The second-heaviest system domain, frequently tested with acid-base and fluid-electrolyte integration.
- Acid-base disorders and compensation patterns
- Renal physiology tied to pharmacologic mechanisms
- Obstructive vs. restrictive pulmonary disease patterns
For the full domain-by-domain breakdown, including how each range is calculated and how it interacts with the separate discipline classification, see the USMLE Exam Domains 2026: Complete Guide to All 11 Content Areas. Note that discipline totals (like Nutrition) overlap across system domains rather than sitting in a single bucket - more on that below.
Scoring & Passing Standard
Step 1 results are reported pass/fail only - there is no three-digit score returned to examinees. The retained passing standard is equivalent to 196 on the former three-digit scale, and examinees typically need approximately 60% correct to clear that bar, though the exact raw threshold shifts slightly depending on the form administered.
For a full explanation of how this equivalency works and what it means for your prep strategy, see USMLE Passing Score 2026: Exactly What You Need to Pass.
2025 Pass Rate Snapshot
First-time pass rates in 2025 were 93% for U.S. MD examinees, 89% for U.S. DO examinees, and 75% for examinees from non-U.S. schools. Beginning with 2025 data, Canadian schools are grouped with the non-U.S. category rather than reported separately.
Key Takeaway
Pass rates are highest for U.S. MD candidates and lowest for the non-U.S. grouping, which now includes Canadian schools - a reporting change worth knowing before you compare year-over-year figures.
For trend context and what these numbers imply about exam difficulty across candidate groups, read USMLE Pass Rate 2026: What the Data Shows.
Attempt Limits & Eligibility Rules
Eligibility is limited to students and graduates of LCME-accredited MD programs, COCA-accredited DO programs, or eligible medical schools outside the United States. There is no separate renewal requirement for Step 1 - it doesn't expire on its own - but the licensing authorities that use your results set their own time limits for completing the full exam sequence.
- A fourth attempt is the final permitted attempt - there is no fifth chance.
- No more than three attempts may occur within any 12-month period.
- U.S. candidates register through NBME; non-U.S. candidates register through FSMB.
Full detail on documentation, school accreditation categories, and application pathways is in USMLE Requirements 2026: Eligibility, Prerequisites & How to Qualify.
2026 Update: Enhanced Nutrition Content
Starting in June 2026, Step 1 began featuring enhanced nutrition content. Nutrition is tracked as a separate discipline allocation at 15-20% - a notably large share - but it's important to understand this figure sits alongside the 11 system domains rather than replacing any of them; discipline totals overlap with system-domain totals rather than adding to 100% independently. In practice, nutrition-related items are woven through domains like Reproductive & Endocrine Systems, Gastrointestinal System, and Multisystem Processes & Disorders rather than appearing as an isolated section.
Key Takeaway
Don't treat the 15-20% Nutrition figure as a standalone content block to cram separately - review nutrition topics embedded within the relevant system domains where they naturally appear.
Last-Mile Review Sprint by Domain
In the final weeks before your test date, allocate review blocks proportionally to domain weight rather than equally. This is the one place a generic technique - timeboxed review sprints - earns its place here, because it only works if it's mapped to the actual Step 1 percentages above.
Heaviest domains first
- Reproductive & Endocrine Systems (12-16%)
- Respiratory & Renal/Urinary Systems (11-15%)
Mid-weight domains
- Behavioral Health & Nervous Systems/Special Senses (10-14%)
- Blood & Lymphoreticular/Immune Systems (9-13%)
- Musculoskeletal, Skin & Subcutaneous Tissue (8-12%)
Remaining systems + integration
- Cardiovascular System (7-11%) and Gastrointestinal System (6-10%)
- Multisystem Processes & Disorders (8-12%)
- Embedded nutrition topics across the above domains
Low-weight domains + full-length practice
- Biostatistics & Epidemiology/Population Health (4-6%)
- Social Sciences: Communication and Interpersonal Skills (6-9%)
- Human Development (1-3%)
- Full-length timed practice blocks matching the 30-minute format
Run your timed practice on the USMLE practice test platform so pacing across fourteen 30-minute blocks feels automatic before test day. If you haven't decided whether the investment of time and fees is worth it relative to your career plans, Is the USMLE Certification Worth It? Complete ROI Analysis 2026 and USMLE Salary Guide 2026: Complete Earnings Analysis lay out the broader picture.
FAQ
For exams on or after May 14, 2026, Step 1 contains up to 280 one-best-answer multiple-choice items across fourteen 30-minute blocks in one eight-hour session.
The 2026 application fee is $695. A $210 testing-region fee applies if you test outside the United States and Canada.
Reproductive & Endocrine Systems is the largest system allocation at 12-16%, followed by Respiratory & Renal/Urinary Systems at 11-15%.
A fourth attempt is the final permitted attempt, and no more than three attempts may occur within any 12-month period.
No. Results are reported pass/fail, with the passing standard equivalent to 196 on the former three-digit scale, requiring roughly 60% correct depending on the form.
Bookmark this page and pair it with practice sessions on the main USMLE practice test site as you move from content review into full-length timed rehearsal.