The SurePass Guarantee — your money back if you don't pass, and Lifetime covers your $270 retake fee. SurePass Guarantee — money back if you don't pass + $270 retake fee on Lifetime. Only 15 left.
RHS prep
From $59
RHS · Radiation Health and Safety
Pass the RHS — or get everydollar back. Guaranteed.
Don't pass? Full refund — and Lifetime pays your $270 retake fee
Know exactly what to study, when to study it, and the moment you're ready to sit.
No payment info required · Full study guide included
- 600 exam-style questions, every one with a written explanation
- The definitive 210-page study guide, free on trial
- A readiness score that tells you when you're actually ready to sit
- Works offline — study anywhere, no signal needed

Free with your trial
The unabridged 210-page RHS study guide — free.
Not a 7-day trial. Not 14 days. Start free and the entire guide is yours to keep — no card, no chapter locks, no sample chapter.
- Yours to keep — the trial has no countdown and the guide never locks
- Read all 210+ pages, not a preview
- Highlight, annotate, and turn any passage into a flashcard
- Glossary tooltips on every key term
- Syncs across every device — pick up exactly where you left off
The Capital Prep Method
What to study, when to study it & the exact moment you're ready.
Cut out the months of studying you don't need. RHS prep that adapts every day — no guessing what to do next.
SurePass readiness
A readiness score built from your own answers — not a progress bar. It moves as you answer, and recent work counts most.


Anywhere Mode · Study from your pocket
Ten minutes of scrolling — or ten minutes closer to passing.
Your phone is already in your hand. Two taps, no signal needed.
- Quick Ten — One tap. Ten questions, with the rationale on every one.
- It downloads itself — No button, no setup, nothing to remember.
- No bars? Still works — Airplane mode, the subway, a cabin in the woods.
- Nothing gets lost. Ever. — Saves as you tap, syncs when you're back.
Flashcards and practice questions work offline. The study guide, audio and full-length mocks need a connection.

Flashcards that work offline

Pass the RHS — or get your money back.
- Every pass: full refund — and you keep Lifetime access, free.
- Lifetime (SurePass Pro): we also pay your $270 DANB retake fee.
What you get with each RHS pass
Every pass includes the full study system. Only the length of access and the guarantee payout change.
Only 15 SurePass guarantees leftWeekly limit 15 · RHS
Lowest price
7-Day Pass
one-time · 7 days of access
Less than the DANB retake fee ($270)
Cram-ready full access for the final week before your exam.
Click any feature to see it.
- Full refund if you don't pass
- Keep full access, free, until you do
One payment · no subscription · secure checkout by Stripe
Strong guarantee
30-Day Pass
one-time · 30 days of access
Less than the DANB retake fee ($270)
A full month to prep — backed by our pass guarantee.
Click any feature to see it.
- Full refund if you don't pass
- Keep full access, free, until you do
One payment · no subscription · secure checkout by Stripe
Lifetime
Best guarantee
one-time · never expires
Less than the DANB retake fee ($270)
Study at your pace, forever — backed by our pass guarantee.
Click any feature to see it.
- Full refund if you don't pass
- We pay your full $270 retake fee — one funded retake
One payment · no subscription · secure checkout by Stripe
- Instant access
- Full study guide on trial
SurePass Guarantee: pass or we refund you — qualify by scoring 80%+ on a full-length mock in the 14 days before your exam. Lifetime also covers your full $270 retake fee. See the full terms · · Prices in USD.
RHS · Features and Pricing
How Capital Prep compares
Tap any i to learn more about a feature.
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Prices and features verified on each company's own site in August 2026; their terms may have changed since, so check before you buy. Exam Edge's price cell is left blank rather than guessed — their site was not readable to us at the time and we would rather show nothing than a number we cannot stand behind. DANB's CHT and BONENT's credentials are different exams; products aimed at those are excluded. DANB publishes no pass rate for the RHS.
Questions, answered
What do I get for free?
The entire 210-page study guide, free, with no card. Every page readable, highlightable, and you can turn any line into a flashcard. Practice questions, mocks and the AI tutor are part of the paid passes.
What score do I need to pass?
DANB reports a scaled score, not a percentage: you need 400 on a 100–900 scale, and they state plainly it is "neither a number correct nor a percent correct score". The exam is also computer-adaptive, so the questions adjust to you as you go. Our mocks are linear, and our own guarantee bar is 80% on them — that is our number, not DANB's.
How long is the exam?
75 multiple-choice questions in 60 minutes, per DANB's own exam outline. Our full-length mocks match that exactly.
Does it work on my phone?
Yes, and offline. Your due flashcards and a set of practice questions download automatically, so you can revise with no signal. Narrated audio and full-length mocks need a connection.
What happens if I don't pass?
If you qualify under the SurePass terms, we refund what you paid — and on Lifetime we also pay your full $270 retake fee. DANB charges the full fee again for a retake; there is no reduced-retake discount, despite what some sites claim.
Are the questions like the real exam?
Every item is written to DANB's own exam outline, weighted domain by domain, with four options and a rationale on each. Every key was recomputed from its own stem before the explanation was read. What we will not do is claim a number we have not measured — where we have run a construction audit we publish it, and where we have not, we say so.
My exam date moved. Does the plan adjust?
Yes. Change the date and the Game Plan rebuilds around the new one — it works backwards from your date, so a move forward compresses it and a move back spreads it out. Nothing is lost.
Why are SurePass guarantees limited each week?
Because we honour them. Every guarantee is a real financial commitment, so we cap how many are live in a given week and the counter you see is a count of genuine commitments — purchases and held checkouts — never a display number. If a week sells out, yours activates the following Monday.
How many full-length mocks do I get?
Three forms, and four scored sittings — each one a brand-new paper drawn fresh, so sitting the same form twice is not a memory test. Practice questions and timed practice are unlimited on top and always have been.
Do you offer refunds if I change my mind?
Yes, separately from the pass guarantee: 24 hours on the 7-Day Pass, 48 hours on the 30-Day Pass, or 72 hours on Lifetime, measured from your purchase (or from your upgrade, if you upgraded) — no questions asked, as long as you haven't sat your exam yet. EEA and UK buyers also keep their 14-day statutory right. The SurePass Guarantee is the other promise — that one is about your exam result, not about changing your mind.
Which pass should I buy?
Work backwards from your exam date. Under a week out, the 7-Day gives you everything for the final push. Sitting within the month, the 30-Day is the honest fit. If your date is further out, Lifetime costs less than two 30-Day passes, never expires, and matters more here than on most exams because RHS recertifies.
What happens when my pass expires?
Your notes, highlights and progress are all kept — nothing is deleted. You lose access to the paid surfaces (questions, mocks, the AI tutor) until you buy again, and the study guide stays free to read as it always was.
Need help deciding?
Ask us anything about the exam, the guarantee or your plan. The assistant answers instantly; for anything it cannot settle, we aim to reply within one business day.
Send us a messageStill not ready?
Start your free trial and read the whole study guide. No payment info required.







