RMI Pass Rate 2026: What the Data Shows

What the Pass Rate Data Actually Shows

Search for the Radon Mitigation Installer (RMI) pass rate and you will find confident-sounding numbers on forums, training-vendor pages and aggregator sites. Here is the honest answer: the National Radon Proficiency Program (NRPP) does not publish a numerical pass rate for the RMI examination in the materials this article draws on, and this article will not invent one.

That may sound disappointing, but it is more useful than a made-up figure. A fabricated percentage tells you nothing about your own odds. What the verified record does show is how the exam is built, who is allowed to sit for it, how it is delivered and how retakes work. Those facts determine how hard the exam is in practice, and they are what this guide covers.

If you want the broader difficulty picture, our complete RMI difficulty guide walks through what candidates tend to find easy and hard, and the RMI passing score breakdown goes deeper on how the competency standard is applied.

Why There Is No Official Pass Percentage

Several structural features of the RMI pathway make a single headline pass rate less meaningful than it appears.

• Candidates arrive pre-trained. Before sitting for the exam, candidates must complete approved measurement training of at least 12 hours and mitigation training of at least 20 hours. Anyone who reaches the exam has already cleared a meaningful preparation hurdle.
• Training quality varies. Different approved providers teach with different emphasis, so aggregate results blend very different preparation levels.
• The exam has changed. Delivery moved to Certiverse live remote proctoring, and since October 1, 2024 the exam includes 10 unscored trial items alongside 85 scored ones. Older results reflect a different testing experience.
• Retakes blur the math. A pass rate per attempt and a pass rate per candidate are different statistics, and with retakes allowed, the two can diverge sharply.

For all of these reasons, the practical question is not "what percent pass?" but "what does the exam demand, and am I ready for it?" The rest of this article answers that.

How Passing Works on the RMI Exam

Passing follows the issuer's competency standard. This article deliberately assigns no numerical cut score, because NRPP's verified materials do not state one in a form that can be responsibly quoted. If you see a specific "you need X% to pass" claim, verify it against NRPP directly. Our RMI passing score guide explains what is and is not known.

The competency-standard framing has a practical consequence: you cannot "game" the exam by mastering one favorite topic. The blueprint spreads weight across six domains, and a candidate who is brilliant on system design but weak on client communication and ethics is exposed on roughly a fifth of the exam.

Exam Format That Shapes Results

Logistics affect performance more than most candidates expect. Here is the verified delivery picture.

Two hours for 95 questions works out to a little over a minute per item. That is comfortable for knowledge questions but tight if you spend long stretches on calculation-heavy items. The in-platform references, SGM-SF-2023 and MAH-2023, are available during the exam, which means you should practice finding information in those documents rather than memorizing every detail. Knowing where a table or requirement lives is a real time-saver. Personal reference books are not allowed, so your preparation should not depend on carrying notes in.

Note that older handbook language referencing Examity delivery and an 85-total-item exam is superseded by the current Certiverse format. If a study resource describes the exam as 85 total questions, it is out of date. For scheduling details, see our RMI exam dates and scheduling guide.

Where Candidates Lose Points: The Six Domains

The published blueprint, from the NRPP Candidate Handbook (document 3-007-4 V7, Appendix A), divides the exam into six domains that total 100%. This is the verified blueprint, not a claimed 2026 revision. Weight tells you where the points are, but it does not tell you where candidates are most likely to stumble. Think about both.

For a fuller breakdown of each area, read our complete guide to all six RMI content areas.

The Prerequisite Chain That Filters Candidates

One reason any pass rate is hard to interpret is that the exam is the middle of a longer pathway, not the entrance. Candidates for the supervised RMI credential must complete the following:

1. Approved measurement training of at least 12 hours.
2. Approved mitigation training of at least 20 hours.
3. A successful RMI examination.
4. A signed Statement of Professional Responsibility.
5. Supervision by an NRPP-certified Radon Mitigation Specialist (RMS) employed by the same company.

Two validity windows matter for planning: training certificates are usable for two years, and examination results are usable for one year. If you pass the exam but delay finishing the rest of the certification steps, your result can expire. Supervision requirements and any applicable state licensing are separate matters, so check your state's rules in addition to NRPP's. Our RMI requirements guide covers eligibility in more detail.

This structure is also why this credential should not be confused with RMS, RMP or state licensure. The RMI is the supervised installer credential. Different credentials have different exams and different requirements.

Retake Rules and the Cost of a Miss

You cannot responsibly plan around "most people pass," but you can plan around the retake rules, which are specific:

• A 30-day wait applies before retaking.
• A maximum of four attempts within 12 months is allowed.
• The exam fee is $125 per sitting, separate from training costs.

Initial certification costs $250 and biennial renewal costs $250, also separate from training. These fees took effect January 1, 2025. Because every failed attempt costs $125 and at least 30 days, the economics favor preparing once, thoroughly, rather than treating the first sitting as a practice run. See the RMI certification cost breakdown for the full pricing picture, and whether the certification is worth it if you are weighing the investment.

A Domain-Weighted Readiness Plan

Rather than a generic study calendar, tie your schedule to the blueprint. The sequence below puts the heaviest and most interdependent material first, then reinforces it with the shorter domains. Adjust the pacing to your own training background.

Use our RMI practice tests to simulate the timing and question style, and see the RMI study guide for a broader resource list. A quick pre-exam review is also available in the RMI cheat sheet. When you are ready to measure yourself against the blueprint, take a timed set on the main practice test site and treat any domain where you hesitate as a priority for another review pass.

One last point on interpreting results: if your practice scores are uneven across domains, trust that signal over your overall average. The competency-standard approach means a weak area can hurt you even when your total looks healthy.

Frequently Asked Questions