- NRSB's study guide publishes a 70% passing score, but no first-attempt pass rate that we could verify.
- The exam has 75 single-best-answer questions in 90 minutes, delivered online with a live virtual proctor.
- Performance of Tests carries the largest published subject count (36), followed by Report of Findings (16).
- Failed candidates may register again after 14 days; the USD 120 fee is nonrefundable.
RMT Pass Rate 2026: What the Data Shows
- What Pass-Rate Data Actually Exists for the RMT
- Which RMT This Article Covers
- Exam Format: The Numbers That Are Published
- Why a Single Pass Rate Would Mislead You
- Where the Questions Come From: Published Subject Counts
- Where Candidates Are Most Likely to Slip
- The 8-Hour vs. 16-Hour Training Conflict
- Failing, Retaking, and the One-Year Window
- A Domain-Ordered Preparation Plan
- After You Pass: Application, Fees, and Renewal
- Frequently Asked Questions
Key Takeaways
- NRSB's study guide publishes a 70% passing score, but no first-attempt pass rate that we could verify.
- The exam has 75 single-best-answer questions in 90 minutes, delivered online with a live virtual proctor.
- Performance of Tests carries the largest published subject count (36), followed by Report of Findings (16).
- Failed candidates may register again after 14 days; the USD 120 fee is nonrefundable.
- Confirm with NRSB whether your training course must be 8 or 16 hours before you enroll.
What Pass-Rate Data Actually Exists for the RMT
Candidates searching for an RMT pass rate usually want one number: the percentage of people who pass on the first try. For the NRSB Radon Measurement Technician exam, that number is not something we could verify in the issuer's published materials. The NRSB study guide, the digital exam information page, and the certification pages describe the exam's format, scoring threshold, and content areas. None of them reports a cohort pass rate.
That is worth stating plainly, because many exam-prep pages fill the gap with confident-sounding percentages that have no traceable source. This article will not do that. What follows is the data that is actually published, what it implies about difficulty, and how to use it to prepare. If you want a broader read on difficulty, see our complete difficulty guide for the RMT exam.
Which RMT This Article Covers
The acronym RMT is shared by several unrelated credentials. This article covers exactly one: the Radon Measurement Technician certification issued by the National Radon Safety Board (NRSB). It is not the NRPP measurement credential, not a state-specific technician exam, and not a massage-therapy credential. If you landed here looking for any of those, the pass-rate discussion below does not apply to them.
If you are still orienting yourself, our explainers on what RMT certification is and what RMT stands for sort out the naming confusion.
Exam Format: The Numbers That Are Published
While a pass rate is absent, the exam's mechanics are well documented. These figures are the real basis for judging how demanding the test is.
| Feature | Published Detail |
|---|---|
| Issuer | National Radon Safety Board (NRSB) |
| Question count | 75 single-best-answer multiple-choice questions |
| Time allowed | 90 minutes |
| Passing score | 70% |
| Delivery | Prolydian online delivery with a live virtual proctor (Proctor360 system requirements) |
| Exam fee | USD 120, nonrefundable |
| Device | Personal desktop or laptop; not a work computer or mobile device |
| Allowed aids | One sheet of scrap paper, a pen or pencil, the on-screen calculator, formula sheet, and digital notepad |
| Retake wait | Register again after 14 days |
| Scheduling lock | No cancellation or change within 24 hours of the appointment |
| Result validity | A passing result remains valid for certification application for one year |
Two things stand out. First, 90 minutes for 75 questions works out to roughly 72 seconds per question, which is comfortable for recall items but tighter for calculation-based ones. Second, the exam is open to a specific set of tools: the on-screen calculator, formula sheet, and digital notepad are available. Knowing where the formulas live matters less than knowing when to apply them. Our breakdown of the RMT passing score goes deeper on how the 70% threshold works in practice.
Why a Single Pass Rate Would Mislead You
Even if a pass rate were published, a single figure would tell you less than you think. Several features of how the RMT is structured make the aggregate number a poor predictor of your own result.
Candidates arrive through different training paths
Standard entry requires approved initial measurement training before the exam. Course quality, length, and instructor emphasis vary, and a candidate who just finished an intensive course sits the exam in a very different state than one who took the course months earlier. A blended statistic hides that spread.
Some candidates never take the exam at all
An alternate application route accepts a current state radon license or an NRPP certificate, plus continuing-education certificates from the current renewal period, in place of the initial course and exam. Those applicants bypass the test entirely. They are not automatic reciprocity cases, since other application requirements still apply, but they do shift who is sitting the exam.
Preparation is the dominant variable
For a 75-question exam with a 70% threshold, the practical question is not "what percent pass?" but "how many questions can I miss?" At 70%, you need at least 53 of 75 correct, which means you can miss up to 22. That framing is more useful than any cohort average. Our guide to passing the RMT on your first attempt builds on that idea.
Where the Questions Come From: Published Subject Counts
The NRSB study guide (running footer April 2026, v1.1) lists six subject areas on printed page 3 with a count beside each. These are the six domains used on this site. The counts, in listed order, are 5, 36, 8, 10, 16, and 2.
| Domain | Published Count |
|---|---|
| Domain 1: Problem Evaluation | 5 |
| Domain 2: Performance of Tests | 36 |
| Domain 3: Analysis of Measurements | 8 |
| Domain 4: Interpretation of Results | 10 |
| Domain 5: Report of Findings | 16 |
| Domain 6: Professional Standards of Conduct and Ethics | 2 |
Still, the shape is clear. Performance of Tests dominates with 36, and Report of Findings follows with 16. Together those two account for the bulk of the classifications. For a domain-by-domain walkthrough, see the complete guide to all 6 RMT content areas.
Where Candidates Are Most Likely to Slip
Because no item-level performance data is published, this section reasons from the exam's structure rather than from reported failure statistics. The inference is straightforward: where the most questions are concentrated, a knowledge gap costs the most.
Domain 2: Performance of Tests
The largest published count by a wide margin. This is the hands-on domain: how measurement devices are placed, retrieved, and handled in the field.
- Device placement and retrieval procedures under a quality-assurance program
- Conditions that affect a valid test and how to document them
- Quality-control practices and the role of supervision by an RMS or ARL
Domain 5: Report of Findings
The second-largest count. Candidates who understand measurement but have not practiced translating results into a clear, accurate report can lose points here.
- What a report must contain and how results are communicated
- Limits of the technician's role versus an RMS's analysis and report-signing authority
Domains 1, 3, 4, and 6
Smaller counts, but not skippable. Problem Evaluation (5), Analysis of Measurements (8), Interpretation of Results (10), and Professional Standards of Conduct and Ethics (2) all appear, and multi-subject questions can pull them into otherwise field-focused items.
One structural point trips people up: RMTs place and retrieve devices under an active quality-assurance program supervised by an RMS or an Accredited Radon Laboratory. The guide permits that QAP oversight for self-provided measurement services only, and that exception does not give an RMT the authority to perform RMS analysis or sign reports. Questions that test where technician authority ends are a natural place to lose points if you blur the roles.
The 8-Hour vs. 16-Hour Training Conflict
Here is a detail that affects your odds before you ever open the exam: the published sources disagree on how much initial training is required. The current NRSB homepage and the Types of Certifications page state 8 hours. The April 2026 study guide states 16 hours on printed page 2. Neither figure is presented as uncontested.
Key Takeaway
Do not assume either number. Contact NRSB to confirm that the specific course you plan to take is accepted before you enroll. Paying for a course that turns out not to qualify would cost you far more than any exam-day mistake.
This matters for pass-rate thinking too. Training is the foundation the exam assumes, so cutting corners on it undermines everything downstream. Our pages on RMT training and RMT requirements and eligibility cover the prerequisite side in more detail.
Failing, Retaking, and the One-Year Window
If you do not pass, the rules are specific. You may register again after 14 days. The USD 120 exam fee is nonrefundable, so a retake means paying again. Appointments cannot be cancelled or changed within 24 hours, so a scheduling slip on exam day is not recoverable.
On the other side, a passing result stays valid for certification application for one year. That gives you a window to assemble the rest of your application without rushing, but it is not open-ended. Plan your paperwork so the pass does not lapse.
A practical consequence of the 14-day wait: if you fail, you have two weeks of targeted review before you can try again. Use the first attempt's experience to identify which domain felt weakest, then spend that window on it. Since Performance of Tests and Report of Findings carry the largest counts, those are the first places to look.
A Domain-Ordered Preparation Plan
Rather than a generic schedule, order your preparation by where the exam concentrates its questions. This is the only study-method section in this article, and it is tied directly to the published counts.
Problem Evaluation and foundations
- Cover Domain 1 early; it is small but frames every field decision that follows
- Review the QAP structure and the RMS/ARL supervision relationship
Performance of Tests (largest count)
- Give this domain the most time: placement, retrieval, documentation, quality control
- Practice calculation items using the on-screen calculator and formula sheet
Analysis and Interpretation
- Work through Domains 3 and 4 together, since interpretation depends on analysis
- Drill the boundary between technician duties and RMS analysis authority
Report of Findings and Ethics
- Study report contents and communication of results (second-largest count)
- Review Professional Standards of Conduct and Ethics, small but easy to secure
Finish with timed practice. Our RMT practice test mirrors the 75-question, 90-minute format so you can rehearse pacing, and the one-page RMT cheat sheet is a handy final-week review.
After You Pass: Application, Fees, and Renewal
Passing the exam is one step, not the finish line. Standard entry also requires approved initial measurement training, a signed application and ethics agreement, affiliation with an NRSB-registered business, approved device details, and identification of the RMS or Accredited Radon Laboratory performing analysis and report signing. The initial application also requires an RMS-designed QA plan.
Certification itself costs USD 125 for one year or USD 200 for two years, separate from the exam fee and from training. Renewal requires 4 approved CE credits annually, which drops to 2 annually after at least 10 years of NRSB certification. Category II credits cannot exceed 50% of the requirement. For the full financial picture, see our RMT certification cost breakdown.
If you are weighing whether the credential pays off, the ROI analysis and the overview of RMT jobs cover who hires certified technicians and what the work involves.
Frequently Asked Questions
No first-attempt pass rate was available in the NRSB materials we reviewed, so we do not quote one. The published figure tied to passing is the 70% passing score, which means answering at least 53 of 75 questions correctly.
Difficulty depends on your training and preparation. The format is 75 multiple-choice questions in 90 minutes with a 70% threshold. The largest published subject count is Performance of Tests (36), so candidates should weight that domain heavily.
Yes. You may register again after 14 days. The USD 120 exam fee is nonrefundable, so each attempt is paid for separately, and appointments cannot be changed within 24 hours.
Not exactly. The published counts (5, 36, 8, 10, 16, and 2) total 77 classifications across 75 questions because some questions cover multiple subjects. They are not percentage weights or an unscored-item breakdown.
A passing result remains valid for certification application for one year. After that, you would need to sit the exam again, so complete your application paperwork within that window.
The honest summary of RMT pass-rate data is that the issuer publishes the exam's structure, not a cohort percentage. Use the verified numbers (75 questions, 90 minutes, 70% to pass, and the six-domain counts) to plan your preparation, confirm your training requirement with NRSB, and test yourself under timed conditions with the RMT Exam Prep practice tests.