- How CRT Scoring Actually Works
- Low Cut Score vs. High Cut Score
- The 160-Question Format and What Counts
- Domain Weighting and Why Interventions Rules Everything
- What the Pass Rate Data Tells You About the Cut Score
- No Penalty for Guessing: Strategy Implications
- Timing Your Prep Around the 2026 Cutoff
- Frequently Asked Questions
- The TMC Exam uses a low cut score for CRT and a separate, higher cut score tied to CSE eligibility.
- Only 140 of 160 questions are scored; 20 are unscored pretest items you can't identify.
- Interventions (Domain 3) carries 70 of 140 scored items - half the entire exam.
- There's no penalty for guessing, so every question should get an answer before time expires.
How CRT Scoring Actually Works
If you're preparing for the Therapist Multiple-Choice (TMC) Examination administered by the National Board for Respiratory Care (NBRC) through PSI, the single most misunderstood part of the process is scoring. Candidates often assume there's one universal "passing score," like 70% on a college exam. That's not how the TMC works. The NBRC uses a criterion-referenced scoring model with two distinct cut scores, and understanding the difference between them changes how you should prepare, how you should pace yourself on test day, and how you should interpret your results.
This matters even more heading into 2026, because this is the final full year the current TMC Exam and its established scoring structure will be in effect. Applications for the existing exam close December 15, 2026, and testing ends December 31, 2026. After that, a new Respiratory Therapy Examination replaces it starting January 4, 2027, with a different question count, timing, and fee structure. If you're reading this to plan your 2026 attempt, you're working with the current, well-documented scoring system - not the incoming one. For a full breakdown of the timeline, see CRT Exam Dates 2026: Testing Windows, Deadlines & Scheduling.
Low Cut Score vs. High Cut Score
The TMC Exam produces two possible outcomes for candidates who pass:
- Low cut score: Meeting this threshold earns you the CRT credential. This is the minimum competency bar the NBRC has determined is necessary for entry-level respiratory therapy practice.
- High cut score: Meeting this higher threshold does everything the low cut score does, plus it establishes Clinical Simulation Examination (CSE) eligibility - but only when the RRT admission requirements are also met. In other words, scoring above the high cut score is what opens the door toward the Registered Respiratory Therapist (RRT) pathway.
This two-tier structure means your target score depends on your goal. If your objective is simply to earn CRT and start working, you need to clear the low cut score. If you're eyeing RRT down the road and want to avoid retaking the TMC later, aiming for the high cut score from the start is the smarter long-term strategy - even though it requires deeper mastery across all three content domains.
Key Takeaway
Don't study "just enough to pass." Candidates who prepare for the high cut score build a safety margin above the low cut score and position themselves for RRT eligibility without a second exam attempt.
The 160-Question Format and What Counts
The TMC Exam is a computer-based test delivered through PSI testing centers, consisting of 160 multiple-choice questions with a 3-hour time limit. Of those 160 questions:
- 140 questions are scored and count toward your low cut score or high cut score result.
- 20 questions are unscored pretest items - these are new questions the NBRC is evaluating for future exams, mixed in indistinguishably among the scored items.
Because you cannot tell scored questions from pretest questions during the exam, the only rational strategy is to treat every single question as if it counts. There's no way to "skip" the unscored ones on purpose, and trying to guess which items are pretest questions wastes mental energy better spent on content recall.
An onscreen calculator is available throughout the exam, which matters for dosage calculations, ventilator parameter math, and other numeric problems that appear across the domains. You won't need to bring your own calculator or memorize long-division shortcuts - but you should still practice using an onscreen calculator interface before test day so it doesn't slow you down.
Domain Weighting and Why Interventions Rules Everything
The passing score doesn't exist in a vacuum - it's built from your performance across three content domains defined in the TMC blueprint, which has been effective since January 2020 and runs through December 2026:
Domain 1: Patient Data
Covers gathering and interpreting clinical information - history, physical exam findings, lab values, imaging, and diagnostic test results - that inform respiratory care decisions.
- Interpreting arterial blood gases and pulmonary function data
- Reviewing chest X-rays and recognizing abnormal findings
- Assessing vital signs and bedside monitoring data
Domain 2: Troubleshooting and Quality Control of Devices, and Infection Control
Focuses on equipment function, malfunction recognition, calibration, and infection prevention protocols tied to respiratory equipment.
- Identifying and correcting ventilator alarms and circuit problems
- Performing quality control checks on blood gas analyzers and other devices
- Applying infection control standards during equipment use and maintenance
Domain 3: Initiation and Modification of Interventions
The largest domain by far, covering the actual clinical decision-making of starting, adjusting, and discontinuing respiratory therapies.
- Initiating and titrating oxygen therapy and mechanical ventilation
- Modifying treatment plans based on patient response
- Recommending changes to therapy, medications, and airway management
The official scored-item allocation across the exam is 50 items for Patient Data, 20 items for Troubleshooting/Quality Control/Infection Control, and 70 items for Interventions - out of 140 total scored questions. That means Interventions alone accounts for half of everything that determines whether you clear the low cut score or the high cut score. No other single domain comes close.
Key Takeaway
Because Interventions represents 70 of 140 scored items, weak performance there is mathematically the hardest gap to overcome elsewhere. Prioritize ventilator management, oxygen therapy titration, and treatment modification scenarios above all else.
For a deeper walkthrough of each content area, including subtopics and sample reasoning patterns, read CRT Exam Domains 2026: Complete Guide to All 3 Content Areas. If you're still mapping out a full preparation plan rather than just the scoring mechanics, the CRT Study Guide 2026: How to Pass on Your First Attempt lays out a broader approach.
| Domain | Scored Items | Share of 140 Scored Questions |
|---|---|---|
| Patient Data | 50 | Just over one-third |
| Troubleshooting, QC & Infection Control | 20 | Smallest share |
| Initiation and Modification of Interventions | 70 | Exactly half |
What the Pass Rate Data Tells You About the Cut Score
NBRC's 2025 data on the TMC Exam shows a clear split between new and repeat candidates. Low-cut pass rates were 78.5% for new candidates versus 48.9% for repeat candidates. High-cut pass rates were 68.2% for new candidates versus 29.4% for repeat candidates. Two things stand out from these numbers.
First, the gap between new and repeat candidates is large at both cut levels, which suggests that candidates who don't pass on the first attempt often face a harder second attempt rather than an easier one - likely because repeat test-takers may be retaking with less structured preparation, or gaps identified the first time weren't fully closed. Second, the high cut score is meaningfully harder to reach than the low cut score for both groups, which reinforces that pursuing the high cut score requires a distinctly higher level of preparation, not just a little extra review.
These figures underscore why first-attempt preparation quality matters more than most candidates assume. For more context on how these numbers compare across recent years and what they mean for your study timeline, see CRT Pass Rate 2026: What the Data Shows and How Hard Is the CRT Exam? Complete Difficulty Guide 2026.
No Penalty for Guessing: Strategy Implications
One structural detail directly affects how you should approach the passing score: there is no penalty for guessing on the TMC Exam. Every unanswered question is simply wrong, while a guessed question has some chance of being right. This has three practical implications for hitting your target cut score:
- Never leave a question blank. With 140 scored items feeding into a criterion-referenced cut score, every blank answer is a guaranteed zero when a guess might have earned credit.
- Manage your 3-hour limit deliberately. With 160 total questions, you have roughly a minute per question on average, but scenario-based Interventions questions often take longer to read and reason through than straightforward Patient Data recall questions.
- Flag and return rather than freeze. If a question stalls you, mark an answer and move on rather than burning minutes you'll need for the Interventions-heavy back half of your pacing strategy.
Timing Your Prep Around the 2026 Cutoff
Because this is the last year to sit for the current TMC Exam before the January 2027 replacement exam takes effect, your preparation schedule should work backward from the December 15, 2026 application deadline and December 31, 2026 final testing date. Building a short, domain-weighted study sequence in the weeks before your test date helps ensure the heaviest-weighted content gets the most repetition.
Foundation in Patient Data
- Review arterial blood gas interpretation and pulmonary function test values
- Practice reading chest X-rays and lab panels tied to respiratory conditions
Devices, QC, and Infection Control
- Work through ventilator alarm scenarios and troubleshooting logic
- Review equipment calibration and infection control protocols
Interventions - the 70-item core
- Drill oxygen therapy initiation and titration scenarios
- Practice mechanical ventilation setup and modification decisions
- Work through medication and airway management case questions
Full-Length Practice and Pacing
- Take timed practice sets modeling the 160-question, 3-hour format
- Review missed items by domain to find remaining weak spots
Notice that Interventions gets nearly double the dedicated time of the other two domains combined - that's intentional, given its 70-item weight. Running full-length timed practice sessions on our CRT practice test platform in the final weeks is one of the most reliable ways to simulate the actual pacing pressure of the real exam before you sit for it.
Frequently Asked Questions
No. The TMC Exam uses two cut scores: a low cut score that earns the CRT credential, and a higher cut score that also establishes CSE eligibility when RRT admission requirements are met. There's no single universal percentage.
No. Only the 140 scored questions count toward your low cut score or high cut score result. The 20 pretest items are unscored and indistinguishable from scored questions, so you should answer every question as if it counts.
Initiation and Modification of Interventions, which accounts for 70 of the 140 scored items - exactly half the exam. Strong performance here has the largest mathematical impact on whether you clear either cut score.
Yes. There is no penalty for guessing on the TMC Exam, so an unanswered question is a guaranteed miss while a guess has a chance of being correct. Always select an answer before time runs out.
You can apply again as a repeat candidate for a reduced USD 150 fee, but NBRC's 2025 data shows repeat-candidate pass rates are notably lower than new-candidate rates at both cut score levels, so strengthening weak domains before retesting matters. Review CRT Requirements 2026: Eligibility, Prerequisites & How to Qualify to confirm your eligibility status remains current for a retake.