# How to Pass the California RDA Exam in 2026

One combined written exam, 125 questions, three hours, and no practical. This guide covers which exam this actually is, the six ways to qualify, the certificate clocks that stall applications, how BreEZe and Live Scan have to be sequenced, why there is no 75% passing score, the official outline weights, what the Board's June 2026 pass data says about your pathway, and how to study for it. Every rule traces to a statute, regulation, or official Board or PSI document.

Last verified 2026-07-24. Published by Dentovio, an independent publisher — not the Dental Board of California, PSI, or any government agency. This guide summarizes publicly available California dental assisting law and official examination information as of the date above; laws, fees, and exam logistics change, so confirm current requirements with the Dental Board of California and your current PSI Candidate Information Bulletin before acting.

## Key facts

- **The exam:** 125 items in 3 hours — Registered Dental Assistant Combined Written and Law and Ethics Examination: 100 scored plus 25 unscored pretest items, computer-based at PSI, English only, results at the test center.
- **Passing standard:** Criterion-referenced — not 75% — A modified Angoff cut score under 16 CCR §1031. The fixed percentage was repealed in 2022, and a printed "75" is a placeholder code for a pass.
- **Practical exam:** None — suspended 2017, then eliminated — BPC §1752.1 requires written evidence of eligibility plus this written exam. Typodont drills prepare you for an exam that no longer exists.
- **Fees:** $120 to the Board, plus the PSI fee — The Dental Board application fee is $120. PSI publishes a $46.59 examination fee; other figures ($27.23, $38.50) circulate and the Board does not state one, so confirm the current amount in your candidate bulletin.
- **June 2026 results:** 72% passed (263 candidates) — Board-approved-program graduates 79%, work-experience pathway 62%, repeat testers 38% (Dental Board of California statistics).
- **Your window:** 2 years from application receipt — No cap on attempts inside it. Let it lapse and the application is abandoned: new application, new $120, and fresh certificates if the recency clocks ran out.
- **If you fail:** Reschedule through PSI in about 7–10 business days — Pay the PSI examination fee again. No new Board application and no new eligibility documents inside your two-year window.

<a id="what-it-is"></a>
## Make sure this is your exam — and that it is one exam, not three
This guide covers one test: the **Registered Dental Assistant Combined Written and Law and Ethics Examination**, required by Business and Professions Code section 1752.1, owned by the Dental Board of California, and delivered by PSI at computer testing centers.

Two structural facts trip up more candidates than any question on the exam does.

**It is one exam.** The old separate *RDA General Written Examination* and *RDA Law and Ethics Examination* were merged into this single test in 2018 — secondary accounts put the change at May 24, 2018. If a prep resource tells you to book two written exams, it is describing a system that no longer exists, and everything else it says about the exam is suspect too.

**There is no practical.** The RDA practical (hands-on) examination was suspended in 2017 and later eliminated. BPC §1752.1 now requires written evidence of your eligibility pathway plus this written examination, and nothing else. Any study material coaching typodont rehearsal — tray setups, dam placement, provisional fabrication, sealant placement on a model — is preparing you for a dead exam.

California also runs two other licensure exams whose names look similar in search results. They are different exams, run under different rules, and their materials will teach you the wrong things:

| Exam | Who takes it | Run by | Where to read about it |
| --- | --- | --- | --- |
| **RDA Combined Written and Law and Ethics Exam** (this guide) | Registered dental assistant candidates | Dental Board of California | [dbc.ca.gov RDA applicant page](https://www.dbc.ca.gov/applicants/become_licensed_rda.shtml) |
| Dental Law and Ethics Exam | DDS/DMD licensure candidates | Dental Board of California | [Dentist exam guide](/guide/california-dentistry-law-ethics-exam/how-to-pass) |
| RDH Laws and Ethics Written Exam | Dental hygienists | Dental Hygiene Board of California (a separate board) | [RDH exam guide](/guide/california-dental-hygiene-law-ethics-exam/how-to-pass) |

One more distinction worth holding onto: the dentist exam is entirely law and ethics. Yours is not. **Laws and Regulations is one weighted area of your exam — 10%, roughly ten scored questions.** Half of your exam is chairside dental procedures. Prep built for the dentist exam covers a tenth of what you need, and it asks from the supervising dentist's perspective rather than the assistant's.

> **Quick check before you spend money on prep:** if a resource mentions a practical exam, two separate written exams, 140 or 150 questions, or "you need 75% to pass," it is out of date on the exam's basic shape. Every one of those was true once. None is true now.

<a id="who-must-take-it"></a>
## Who must take it, and the six ways to qualify
Every route to a California RDA license runs through this exam. There is no waiver, no reciprocity shortcut, and no out-of-state credential that substitutes for it. What the pathways decide is not *whether* you test — it is whether you are **eligible** to test.

Under BPC §1752.1, as repealed and re-enacted by **SB 1453 (Ashby, Chapter 483, Statutes of 2024), operative July 1, 2025**, you qualify through one of these:

| Pathway | What it requires |
| --- | --- |
| **Board-approved program** | Graduation from a Dental Board–approved educational program in registered dental assisting. |
| **Work experience** | At least **15 months and a minimum of 1,280 hours** of satisfactory work experience performing dental assistant duties, certified by your supervising dentist on the Work Experience Certification form. |
| **DANB CDA** | A current, valid Certified Dental Assistant certification from the Dental Assisting National Board. |
| **Alternative program** | At least **500 hours** of didactic and laboratory coursework plus at least **300 hours** of clinical chairside experience under a licensed dentist. |
| **Preceptorship** | At least **500 hours** of clinical chairside work experience supervised by a preceptor dentist plus at least **300 hours** of dental-assisting coursework. |
| **RDH crossover** | A California registered dental hygienist may apply for RDA licensure by passing this combined exam. |

Three corrections to claims that circulate widely in assisting programs and Facebook groups:

- **A DANB CDA is not a California license.** It is an eligibility pathway. You still file the Board application, pay the fee, clear the background check, and pass this state exam.
- **The preceptorship hour figures are 500 and 300, not 800.** An "800 clinical hours" number circulates in secondary sources and does not match the statute.
- **Work experience must be certified, not just claimed.** The supervising dentist attests to competent performance of assignable duties on the Board's form. Assemble that signature early; chasing a former employer's signature is one of the most common self-inflicted delays.

Whichever pathway you use, the exam is the same exam, the outline is the same outline, and — as the [pass-rate section](#difficulty) shows — the pathway you came through is the single strongest published predictor of how you will do on it.

<a id="certificates-and-clocks"></a>
## Required course certificates and their expiration clocks
This is where applications die, and it has nothing to do with how well you know dentistry. Every pathway requires board-approved course certificates, and several of them **expire against your application date** — not your exam date, not your hire date.

| Certificate | Recency limit at application |
| --- | --- |
| California **Dental Practice Act** (2-hour course) | Completed within **2 years** before applying |
| **Infection control** (8-hour course) | Completed within **2 years** before applying |
| **Coronal polishing** course | Completed within **5 years** before applying |
| **Pit and fissure sealants** course | Completed within **5 years** before applying |
| **Radiation safety** course | Board-approved course completed within **10 years** before the Board receives your application; the certificate must be displayed where you work |
| **Basic Life Support (BLS)** | Current certification, with a **live, in-person skills session** |

Four things to do something about today:

1. **Count backward from the day you will file, not from today.** If your Dental Practice Act certificate is 22 months old and your work-experience form is still unsigned, that certificate will be stale before the application goes in.
2. **Online-only CPR is rejected.** BLS must include a hands-on skills session with an instructor. A fully online card is the single most common certificate rejection.
3. **The clocks reset the problem if your window lapses.** If your two-year eligibility window expires and you reapply, every recency clock is re-checked against the *new* application. A candidate who takes 25 months to pass can find themselves repaying for the Dental Practice Act and infection-control courses on top of the $120.
4. **Budget for the courses, because they dominate the real cost.** The Board fee and the PSI fee together are a small fraction of what becoming an RDA costs. Published California course prices vary enormously by provider — the coronal polishing, sealants, and radiation safety courses in particular run from a few hundred to a few thousand dollars each. Shop them, and confirm each provider is **Board-approved** before paying; a certificate from a non-approved course is worth nothing to this application.

One rule worth separating from the certificate list, because prep material routinely merges them: the certificates above are what the **RDA application** requires. The employment rules for an unlicensed dental assistant are different and changed in 2025 — see [what changed](#what-changed).

<a id="how-to-apply"></a>
## How to apply: BreEZe, then Live Scan, then PSI
The order matters, and it is not the order most candidates assume. You apply first. You get fingerprinted second — after the Board authorizes it. You schedule the exam third.

| Step | What happens | Who | Cost |
| --- | --- | --- | --- |
| 1 | Finish your pathway requirements and collect every board-approved course certificate | You | course fees |
| 2 | File the **"Application for Registered Dental Assistant Examination Request"** in [BreEZe](https://www.breeze.ca.gov/), uploading your pathway document and all certificates | You | **$120**, non-refundable |
| 3 | Board reviews the application (stated standard: **up to 30 days**) and flags it complete or deficient | Dental Board | — |
| 4 | Board sends you a **Request for Live Scan Service** form; you take it to an authorized Live Scan site | Board, then you | vendor rolling fee |
| 5 | DOJ and FBI process the background check (the Board states the DOJ report usually returns within about **seven days**) | DOJ / FBI | — |
| 6 | Board issues the eligibility notice; PSI sends the Candidate Information Bulletin | Board / PSI | — |
| 7 | Register and schedule with PSI, then test | You | PSI examination fee |

**Do not get fingerprinted early.** This is the sequencing trap. Candidates try to save time by going to a Live Scan site before applying, and the prints arrive at the Department of Justice with nothing to attach to. The Board now requires authorization *before* fingerprinting and sends you the specific Live Scan request form once your application and fee are in. A license or permit will not issue until both DOJ and FBI clearances are back.

**Out of state, or without access to a California Live Scan site?** The Board offers an "ink on cards" hard-card method: you obtain two fingerprint cards from the Board, have them rolled at a local law enforcement agency, and submit a **$49 non-refundable processing fee** to the Board. Some older documents circulate a $51 figure; the Board's current instructions say $49. Expect hard-card processing to take considerably longer than Live Scan — reports can take from a month to several months.

**Paper filing still exists.** Mail the completed application, your pathway document, copies of every certificate, and a $120 check or money order to the Dental Board of California, 2005 Evergreen St., Ste. 1550, Sacramento, CA 95815.

**Watch both your mailbox and your inbox.** The Board's published text says it sends the approval notice to your **address of record** and that PSI **mails** the Candidate Information Bulletin. A secondary prep source claims the Board's licensing unit has communicated by email only since April 2026. Those two statements conflict, and we have not verified the email-only claim against a Board publication — so monitor the postal address and the email tied to your BreEZe account until you have the notice in hand.

**An application without payment is not an application.** The Board treats unpaid submissions as "not considered submitted." If documentation is missing, the application is marked deficient and sits until you supply it.

**Scheduling with PSI.** Once eligible, register directly with PSI online at psiexams.com or [test-takers.psiexams.com/cadenb](https://test-takers.psiexams.com/cadenb), or by phone at **(877) 392-6422** — live registrars are available Monday through Friday, 4:30 a.m. to 7:00 p.m., and weekends 6:00 a.m. to 2:30 p.m. Pacific. Mail and fax registration also exist and take up to two weeks to process.

**Cancellation is a two-day rule with no soft edges.** You may reschedule without losing your fee if PSI receives notice **two days before** your appointment — a 9:00 a.m. Monday exam must be canceled before 9:00 a.m. the previous Saturday. Cancel on the PSI website or by speaking to a live representative; **voicemail and email are explicitly not accepted**. No-shows, late arrivals, and invalid identification all forfeit the fee.

**The name on your application must match the name on your ID, exactly.** A mismatch means denied entry, a forfeited fee, and a name change processed with the Board or the DMV before you can test.

<a id="exam-format"></a>
## Exam format: 125 items, 3 hours, and what is actually on the screen
Everything the official materials commit to about the mechanics:

- **125 multiple-choice items:** **100 scored** and **25 unscored pretest** items. You cannot tell them apart while testing, so answer everything as though it counts.
- **3 hours**, computer-based, at a PSI test center. There is no remote-proctoring option for California dental board exams.
- **English only.** Translation was evaluated in 2024; no alternate-language delivery is currently offered.
- **Up to 15 minutes of on-screen tutorial** before the exam, which does **not** count against your three hours.
- **Results at the test center**, handed to you when you finish.

That is the current form. Older sources describe **140 or 150 questions** — those counts are stale, and a resource still printing them has not been updated through the restructure that produced the 100-scored/25-pretest format.

Some exam-room details that candidates ask about — whether you get physical scratch paper or an electronic whiteboard, whether an on-screen calculator is available, and the exact list of California and out-of-state test centers — are not specified in the Board and PSI documents we could verify. Those belong to your **current PSI Candidate Information Bulletin**, which PSI provides once you are eligible. Read it when it arrives rather than trusting a forum post about what a center allowed three years ago.

Pacing math, since the exam gives you a lot of room: 125 items in 180 minutes is about **86 seconds per item**. That is generous for a recall-heavy multiple-choice test. The practical consequence is that running out of time is rarely what fails candidates on this exam — running out of *knowledge* on the 50% Dental Procedures area is. Use the surplus time for a full second pass over flagged items.

<a id="scoring"></a>
## How scoring really works — and why "you need 75%" is wrong
**There is no fixed percentage you must reach to pass this exam.** The passing standard is **criterion-referenced**, set for each test form by the **modified Angoff** method under **16 CCR §1031**. The old fixed percentage cut score was **repealed in 2022**.

Here is what the Angoff method actually does. A panel of subject-matter experts reviews every item on a form and judges how likely a minimally competent entry-level RDA is to answer it correctly. Those judgments set the passing score for **that form**. A harder form needs fewer correct answers; an easier form needs more. Your result does not depend on how other candidates did — it depends on a standard set before you sat down.

Three consequences follow, and each one changes how you should study:

1. **Stop budgeting misses.** "I can afford to miss six infection-control questions" assumes a fixed percentage and a fixed denominator. Neither exists here. Any prep material that tells you how many questions you can miss in a subarea is teaching from a repealed rule.
2. **Stop chasing 75%.** The Board reports **pass/fail only** and does not release your raw score or true percentage. To fit state reporting systems, score reports carry **placeholder** numbers: a printed **"75" means you passed** — it is a code, not a percentage you earned. Candidate-facing prep sources also report a placeholder **"55"** on failing reports; that figure comes from secondary sources rather than a Board publication, so treat the exact number as unconfirmed while treating the underlying point — that neither figure is your real score — as solid.
3. **You will not get a diagnostic breakdown.** As of 2026 the Board and PSI do not publish granular per-domain performance feedback on failing reports. Board meeting minutes from over a decade ago show the idea being explored; there is no primary confirmation that it is offered today. That means a retaker has to self-diagnose against the published outline rather than read a printout. The [retake section](#if-you-fail) covers how to do that.

The strategic implication is simple and slightly unforgiving: because the standard is minimum competence **across the whole blueprint**, you cannot pass by being excellent at the part of dentistry your office happens to do. Depth in one area does not buy forgiveness in another.

<a id="blueprint"></a>
## What the exam covers: the official 2023 outline, with weights
The blueprint is the Dental Board's **Registered Dental Assistant Combined Written and Law and Ethics Examination Outline (2023)**, built on an occupational analysis by the Department of Consumer Affairs' Office of Professional Examination Services ([official PDF](https://www.dbc.ca.gov/formspubs/rda_exam_outline.pdf)). It defines four areas, 51 task statements, and 137 knowledge statements. PSI builds live forms against it.

| Area / subarea | Weight | Scored items (of 100) |
| --- | --- | --- |
| **1. Assessment and Diagnostic Records** | **15%** | ~15 |
| 1A — Patient Information and Assessment | 8% | ~8 |
| 1B — Diagnostic Tests and Records | 7% | ~7 |
| **2. Dental Procedures** | **50%** | ~50 |
| 2A — Treatment Preparation | 15% | ~15 |
| 2B — Direct and Indirect Restorations | 10% | ~10 |
| 2C — Preventative and Aesthetic Procedures | 10% | ~10 |
| 2D — Patient Education | 10% | ~10 |
| 2E — Specialty Procedures | 5% | ~5 |
| **3. Infection Control and Health and Safety** | **25%** | ~25 |
| 3A — Patient Safety and Prevention of Disease Transmission | 15% | ~15 |
| 3B — Equipment Disinfection and Cross-Contamination Prevention | 10% | ~10 |
| **4. Laws and Regulations** (no lettered subarea) | **10%** | ~10 |

*(Item counts are the weights applied to 100 scored items — a planning aid, not a Board-published per-area count.)*

What the shape of that table should do to your study plan:

- **Area 2 is half the exam.** Tray and instrument setups, isolation, bases and liners, matrices and wedges, etchants and bonding agents, provisional restorations, cement removal, coronal polishing, sealants, bleaching, patient education, and specialty assisting — endodontic paper points, periodontal dressings, archwires, ligatures, suture removal, extraoral denture adjustment. If your chairside experience is narrow, this is where the exam finds out.
- **Area 3 is the second-largest block, and it is regulation-anchored.** Infection control answers come from **16 CCR §1005** and **Cal/OSHA's bloodborne pathogen standard (8 CCR §5193)** — not from how your office does it. The correct answer is the one matching the controlling text even when a shortcut "works in real life."
- **Area 4 is small but rigid.** Ten percent is roughly ten questions, and they are the least forgiving on the test: consent, HIPAA, mandated reporting for child and elder or dependent-adult abuse, record-keeping and record disposal, professional conduct, and scope of practice. Each has one legally correct answer.
- **Supervision is the hidden hinge.** Every task in Areas 1 and 2 is framed as performed "under the supervision of a dentist." A question that looks clinical is often really asking whether the duty runs under **general** or **direct** supervision, or whether it belongs to your category at all. When that happens, resolve it against the Dental Practice Act and the Board's current permitted-duties table, not clinical instinct.

The [free 15-question practice test](/rda/free-practice-test) is built on these same proportions, so a weak area there maps directly onto a row above. The [RDA exam facts page](/rda) carries the outline in reference form.

<a id="difficulty"></a>
## How hard is it? What the Board's June 2026 numbers show
The Dental Board publishes examination statistics monthly, so unlike most licensure exams this one has current, public, pathway-segmented data. The **June 2026** report covers **263 candidates**:

| Group | Pass rate |
| --- | --- |
| **Overall** | **72%** |
| Board-approved-program graduates | **79%** |
| Work-experience pathway | **62%** |
| Repeat testers | **38%** |

Sources: the Board's [June 2026 statistics report](https://www.dbc.ca.gov/formspubs/rda_062026.pdf) and its [2026 statistics hub](https://www.dbc.ca.gov/applicants/rda_written_exam_stats_2026.shtml). One month is a snapshot, not a trend — read the surrounding months on the hub before drawing conclusions about any particular cohort. But two of these numbers are large enough to act on.

**The pathway gap: 62% versus 79%.** Work-experience candidates fail at nearly twice the rate of program graduates, and the reason is structural rather than personal. On-the-job training teaches the protocols of one office and the preferences of one dentist. The exam tests the Board-approved, textbook version: the standardized instrument names, the material science behind cements and etchants and curing, the regulation-anchored infection-control sequence, and the supervision categories as written. A candidate who has placed a thousand matrix bands beautifully can still miss the item asking which band type is indicated, because nobody ever made them name it. If you came in through work experience or preceptorship, the work is not learning to assist — it is **translating what you already do into the vocabulary and the rules the exam uses**, and covering the procedures your office never performs.

**The retake gap: 38%.** Fewer than two in five repeat testers pass. That is the most sobering number on this page, and it says something specific: **failing once and studying the same way again mostly produces a second failure**. Because the standard is minimum competence across the whole blueprint, a retaker who doubles down on their strongest area gets nowhere. Combined with the absence of a diagnostic score report, this makes a deliberate, outline-wide rebuild the only defensible retake plan.

**What failing actually costs.** Not much money — the PSI fee again, and no new Board application inside your window. What it costs is time: about 7 to 10 business days before you can reschedule, plus whatever the center's availability adds, against a two-year clock and, usually, a pay bump you are waiting on. The rational response is not to spend more on prep. It is to make sure whatever you study is **current, outline-shaped, and covers the areas your job does not**.

<a id="what-changed"></a>
## What changed in 2024–2026 (where old prep fails you)
Nearly every dangerous error in circulating RDA prep traces to one bill and one chart: **SB 1453 (Ashby, Chapter 483, Statutes of 2024)** and the Board's **Table of Dental Auxiliary Duties Delegable by Supervising Dentist, effective January 1, 2025**. SB 1453's operative dates split, and the split is testable: the assisting provisions took effect **January 1, 2025**, while the re-enacted licensure statute BPC §1752.1 is operative **July 1, 2025**.

| Topic | What old materials say | The current rule | Authority |
| --- | --- | --- | --- |
| Infection-control training for an unlicensed assistant | "Up to a year to complete the 8-hour course" | The 8-hour course must be completed **before** performing basic supportive procedures involving potential exposure to blood or saliva. No grace period | BPC §1750(c), eff. 1/1/2025 |
| Dental Practice Act course and BLS for an unlicensed assistant | Merged with the above | Still due **within one year** of the first date of employment — do not merge the clocks | BPC §1750 |
| Coronal polishing | "RDA-only duty" | An **unlicensed dental assistant may polish** after a board-approved coronal polishing course, under **direct supervision**, with the dentist evaluating each patient — and only after the 8-hour infection control course and current BLS | BPC §1750(f)(4), eff. 1/1/2025 |
| Pit and fissure sealants | "A course lets any assistant place them" | Placement is limited **by category** to an **RDA, RDAEF, RDH, or RDHAP**. For the RDA, the course sits on top of the category | BPC §1750.1(f) |
| RDA duties | Older single duty list | BPC §1752.4 restructured: subd. (a) general-supervision core duties; subd. (b) course-gated duties including sealants; subds. (c)–(d) the dentist verifies courses and sets the supervision level per procedure; subd. (e) two direct-supervision orthodontic duties | BPC §1752.4, eff. 1/1/2025 |
| License display | "Paperwork" | Failing to display the licenses of all dental practitioners where patients can see them is a **misdemeanor** | BPC §1700, eff. 1/1/2025 |
| Conduct rules | "They start after you are licensed" | The Board may **deny** an application for unprofessional conduct, or issue a probationary license (default **three years**), post the decision publicly, and bar reapplication for at least one year | BPC §1628.7, eff. 1/1/2025 |
| Board structure | Hygienist seat; earlier sunset | Sunset extended to **2029**; the hygienist seat replaced by a **second RDA seat** | SB 1453 |
| Duty charts | "This 2019 chart looks official" | Only the Board's table **effective January 1, 2025** controls. It uses a D / G / CR notation — direct, general, course required | DBC permitted-duties table |

The coronal-polishing and sealant rows are the two most consequential scope corrections on this page, because prep material gets them backwards in both directions. Polishing is **not** RDA-exclusive any more. Sealants **are** category-restricted, and no course changes that.

One nuance that decides close questions: **general supervision is a floor, not a promise.** BPC §1752.4(d) lets the supervising dentist require direct supervision for any subdivision (a) duty, and the Board's table can be stricter than the statute. Where a question's wording tracks the table, answer to the table.

And the exam-structure history that still misleads people:

| Year | What happened | What to believe now |
| --- | --- | --- |
| **2017** | The practical examination was suspended, then eliminated | Written evidence of eligibility plus the written exam. Nothing else |
| **2018** | The general written and law and ethics exams merged | You book **one** exam |
| **2022** | The fixed percentage cut score was repealed | Criterion-referenced pass/fail under 16 CCR §1031; a printed "75" is a placeholder |

**What to purge from old materials, in one list:** the practical exam; two separate written exams; 140 or 150 questions; "you need 75%"; "only an RDA may polish"; "a course lets an unlicensed assistant place sealants"; "the preceptorship needs 800 clinical hours"; any pre-2025 duties chart; "general supervision is guaranteed"; and "license display is just paperwork."

<a id="study-plan"></a>
## How to study: three plans, built on the outline weights
Generic advice does not help here, because the Board's own data says the three candidate types fail for different reasons. Start from the weights — **50 / 25 / 15 / 10** — and from what your route into this exam did *not* teach you.

Two ground rules first, and they apply to all three plans. **Practice questions beat re-reading.** Retrieval practice is among the best-evidenced study techniques there is, and re-reading reliably produces an illusion of competence — which is exactly the trap on procedural material you already "know" from work. And **spread your reviews**: return to each area every few days rather than blocking one area for a week.

### A. The board-approved program graduate

You have the strongest published pass rate (79%) and recent formal didactics behind you. Your risk is not chairside knowledge — it is that programs teach general national standards while the exam tests **California-specific rules**.

- **Weeks 1–2, and this is the whole plan:** Area 4 (10%) and the regulation-anchored half of Area 3 (25%). Work the Dental Practice Act, supervision levels, the permitted-duties table effective January 1, 2025, consent, HIPAA, mandated reporting, records retention and disposal, and unprofessional conduct. Drill the D / G / CR distinctions duty by duty until "who may do this, and must the dentist be present" is automatic.
- **Then one timed pass across Areas 1 and 2** to confirm your program's coverage matches the outline — especially 2E specialty procedures, which programs cover unevenly.
- **Do not re-read your textbooks.** Take questions, mark misses, restudy only what you missed.

### B. The work-experience or preceptorship candidate

You are the 62% cohort, and the gap is real. Plan on **four to six weeks** of structured study, not a weekend of review, and treat the goal as translation: converting what your hands already do into the standardized names, the underlying material science, and the Board-approved protocol.

- **Weeks 1–2 — Area 3 (25%).** Infection control is where office custom diverges most from the controlling text. Study 16 CCR §1005 and Cal/OSHA's bloodborne pathogen standard directly: standard precautions, PPE sequence, hand hygiene, instrument processing and sterilization monitoring, surface barriers, sharps handling, evacuation lines, waterline monitoring. Where your office's routine differs from the standard, the standard wins on the exam.
- **Weeks 2–4 — Area 2 (50%), with the emphasis on what you do not do.** Cover 2A treatment preparation and 2B restorations even if a hygienist or the dentist handles part of it in your office, and give 2E specialty procedures real time — pulp vitality testing, paper points, periodontal dressings, archwires and ligatures, suture removal, extraoral prosthetic adjustment. Learn instruments and materials by their **textbook names**, plus the indications, contraindications, and mixing or curing behavior behind them.
- **Week 5 — Area 1 (15%).** Histories and medical conditions affecting treatment, premedication, vital-sign ranges, mouth-mirror inspection findings, radiographic technique and quality factors, and charting with universal numbering and Palmer notation.
- **Week 6 — Area 4 (10%) and mixed full-length practice.** Finish on law, then take mixed-area timed sets so the topic order is randomized the way the real form is.

### C. The repeat tester

Thirty-eight percent of repeat testers pass, and you get no per-domain score report to work from. So build the plan the data implies rather than the one your memory of the exam suggests.

- **Assume the shortfall is in Areas 2 and 3.** They are 75% of the exam; a candidate cannot fail while being solid on both.
- **Re-baseline before you study anything.** Take a timed mixed-area test cold and let the results, not your feelings about the last sitting, pick the order.
- **Spend three to four weeks covering every area, weighted.** Deliberately over-invest in the subareas you avoid — usually specialty procedures and the parts of restorative your office does not perform.
- **Switch modes.** If your first attempt was built on reading and flashcards, make this one scenario questions with written rationales. Re-reading the same source at higher volume is the approach that already failed once.
- **Re-check the currency of everything you used.** If your materials taught a 75% pass mark, a practical exam, or a pre-2025 duties chart, the problem was the materials.

Start any of the three with a baseline: the [free 15-question practice test](/rda/free-practice-test) is proportioned to the official outline and returns an area-by-area map in about fifteen minutes.

<a id="resources"></a>
## What to study from: free and official first
**Disclosure, first:** Dentovio publishes this guide and sells a paid RDA prep course. This section covers the free path honestly anyway, because for this exam the free path is genuinely viable and you should know what it does and does not give you.

**The official free stack.** The Board and PSI point candidates at primary texts, and all of them are free:

- The **PSI Candidate Information Bulletin** for this exam — the outline, the rules, the logistics, and a handful of sample questions. PSI provides it on eligibility, and it is also available through the PSI site under the California Dental Board listings.
- The **California Dental Practice Act** (BPC §§1600 et seq.) and the Board's regulations (**16 CCR §§1000 et seq.**).
- The **Minimum Standards for Infection Control** (16 CCR §1005) and **Cal/OSHA's bloodborne pathogen standard** (8 CCR §5193) — the controlling texts for a quarter of your exam.
- The Board's **[Table of Dental Auxiliary Duties Delegable by Supervising Dentist](https://www.dbc.ca.gov/formspubs/pub_permitted_duties.pdf)**, effective January 1, 2025.
- The Board's **[monthly examination statistics](https://www.dbc.ca.gov/applicants/rda_written_exam_stats_2026.shtml)**, which tell you how your cohort is actually doing.

**Can you pass on that alone? Yes** — the statutes and standards are the source the questions come from. What the free stack does not give you is any real practice engine (the Board and PSI publish no free question bank beyond the bulletin's samples), any coverage of the 50% clinical area, or any signal about which rules changed since the notes a coworker handed you.

**What the paid market looks like.** The category is fragmented and mostly built around in-person review days or generic quiz apps:

| Resource type | What it is | The honest read |
| --- | --- | --- |
| Official free stack | CIB, statutes, 16 CCR §1005, Cal/OSHA, duties table | Authoritative by definition. No practice engine, no clinical instruction, no currency signal |
| School and Zoom review courses | Full-day or one-on-one review sessions from California assisting schools and academies | Useful structure and live Q&A; quality and currency vary by instructor, and some published materials still cite retired question counts |
| Digital quiz banks | Free and paid practice-question sites mapped to the four domains | Fast feedback and cheap. Verify the domain weights and the duties rules they teach; several sites still repeat the 75% myth |
| Shared PDFs and flashcard decks | Uploaded "200 practice questions," Quizlet sets | The highest concentration of stale-prep traps — retired practical exam, pre-2025 duty charts, repealed cut score. Anything sold as real exam content is also an exam-security problem you do not want near your license file |
| **Dentovio** (that's us) | Source-cited modules across all four outline areas, a question bank with rationales, a full-length practice exam on the 100-scored-item format, and quick-review sheets | Reading- and drill-focused, not video lectures. Every rule traces to a primary source and carries the date it was last verified. [See what's included](/products/california-rda-exam) |

Whatever you pick, run two checks on it: **is it built for the RDA combined exam specifically**, and **does it show you when each fact was last verified against the primary source?** A resource that fails either test costs more than it saves, whatever the price.

<a id="exam-day"></a>
## Exam day at PSI: ID, check-in, and the rules that carry real penalties
**Bring current, valid, government-issued photo identification** — a driver's license, passport, or alien registration card — and make sure the **first and last name on it match your Board application exactly**. This is enforced without discretion. A mismatch means you are denied entry, you forfeit the examination fee, and you process a name change with the Board or the DMV before you can test again.

**Arrive early.** Arriving after your scheduled start time forfeits both the appointment and the fee. The 30-minute buffer that circulates online is the testing industry's general practice rather than a rule we can point to in a Board or PSI document for this exam, so treat your current Candidate Information Bulletin as controlling and give yourself margin regardless.

**At the terminal**, confirm your name and identification number on screen. You then get up to **15 minutes of tutorial**, which does not consume any of your three hours. The exam follows, with 125 items to move through.

**Exam security is criminal law, not a policy.** Under Business and Professions Code §§123 and 123.5, subverting a licensing examination — copying questions, communicating during the test, reproducing exam material afterward — is a **misdemeanor**, punishable by a fine of **up to $10,000** plus the costs of litigation, and it can support denial, suspension, or revocation of a license. This is also why no legitimate prep resource sells "actual exam questions," and why you should walk away from any that claims to.

**Center-specific details** — scratch paper versus an electronic whiteboard, whether a calculator is available, the exact prohibited-items list, and the roster of California and out-of-state centers — are set out in your current PSI bulletin and were not verifiable in the documents behind this guide. Read the bulletin PSI sends you.

**Results are immediate.** Written examination results are handed to you at the PSI site as soon as you finish. Remember what that report is: pass or fail, carrying a placeholder number rather than your real score.

<a id="if-you-fail"></a>
## If you fail: the exact retake playbook
More than a quarter of candidates fail a sitting, so this is a documented part of the system rather than an unusual outcome. The mechanics are straightforward; the strategy is where retakers go wrong.

1. **Contact PSI to reschedule.** The Board's instruction to candidates who fail — or who miss a scheduled test date — is that you can contact PSI to reschedule in **7 to 10 business days**.
2. **Pay the PSI examination fee again.** Every attempt carries it.
3. **Do not repay the Board.** No new $120 application and no new eligibility documents are required inside your two-year window. The Board's own words: additional submission for eligibility, or submission of a re-exam application, is not required.
4. **Watch the window, not the attempt count.** There is no published cap on attempts. There is a hard two-year limit from when the Board received your application. Let it lapse and the application is deemed abandoned: new application, new $120, and any course certificate whose recency clock ran out has to be retaken.

**Now the part that decides the outcome.** Only **38%** of repeat testers passed in the Board's June 2026 report, and you will not receive a per-domain breakdown to work from — the Board and PSI do not publish granular diagnostic feedback on failing reports. So a retake plan built on "I think I struggled with infection control" is a guess.

Do this instead:

- **Re-baseline cold** with a timed, mixed-area practice test before you open a single study document, and let the result set your order.
- **Assume Areas 2 and 3 carry the shortfall.** They are three-quarters of the exam. Passing while weak in both is arithmetically implausible.
- **Cover everything, weighted.** The criterion-referenced standard rewards minimum competence across the blueprint, not excellence in one area.
- **Audit your materials before you reuse them.** If they taught a 75% cut score, a practical exam, two written exams, 140 questions, or a pre-2025 duties chart, the materials failed you — see [what changed](#what-changed).
- **Change how you study, not just how long.** Reading more of the same source is what already did not work. Move to timed questions with written rationales for every miss.

The [free practice test](/rda/free-practice-test) is a reasonable cold re-baseline: it is proportioned to the official outline and returns an area-by-area map without a signup.

<a id="after-you-pass"></a>
## From passing score to license number
The good news about this credential: passing is very nearly the last step. If you pass, your application is approved and on file, and your DOJ and FBI clearances are back, licensure triggers without another application round.

- **There is no separate initial license fee.** The Board's position is explicit — the initial $120 application and examination fee covers issuance. Nothing further is owed to get the number.
- **The Board issues a pocket identification card and a wall certificate.**
- **Your license number appears in the [DCA license search](https://search.dca.ca.gov/)**, which is where employers verify you. If weeks pass and nothing has arrived, check the lookup first — the number often populates before the mail does. A replacement pocket license can be requested through BreEZe for a fee.
- **Post what has to be posted.** Your radiation safety certificate must be displayed where you work, and the practice must display the licenses of every dental practitioner in the facility where patients can see them — since 2025, failing to do so is a misdemeanor.

**Then the recurring obligations begin.** The RDA license renews on a two-year cycle with a renewal fee and continuing-education requirement set by the Board. Fee schedules and CE requirements change, so confirm the current renewal fee, the current unit requirement, and any mandatory course content directly with the Dental Board rather than from a prep site — including this one.

**And know what your license does and does not authorize.** The RDA category unlocks the BPC §1752.4 duty set, including the course-gated additional duties, but the never-delegable core in BPC §1750.1(d) still applies to you: no diagnosis or comprehensive treatment planning, no prescribing, no surgery or cutting on hard or soft tissue, no placing, finishing, or removing permanent restorations, no starting the flow of nitrous oxide and oxygen, and no administering anesthesia or sedation. Orthodontic assistant and dental sedation assistant permits expand your delegable duties; they do not create a separate license category.

<a id="rdaef"></a>
## RDAEF: the credential after this one
The **Registered Dental Assistant in Extended Functions (RDAEF)** is the advanced California credential, and it meaningfully expands scope — an RDAEF licensed on or after January 1, 2010 may place, contour, finish, and adjust **direct restorations** after the dentist's diagnosis, under direct supervision, with the required course. That is work no RDA may perform.

The pathway, in short:

1. Hold a current, active California **RDA** license.
2. Complete a board-approved **pit and fissure sealants** course.
3. Complete a comprehensive **board-approved RDAEF educational program** — commonly described as roughly eight to nine months and several hundred instructional hours for current RDAs; program length and hours vary by provider, so confirm with the school.
4. Clear a background check and pass the **RDAEF written examination** administered by PSI.

**One timing note.** The Board placed the RDAEF examination under a maintenance blackout running from November 14, 2025 through July 31, 2026 while it reviewed and updated the exam. Published accounts of the restart differ slightly — the updated exam was scheduled to go live on July 15, 2026, with registration reopening July 1, 2026 — so if you are planning an RDAEF sitting in 2026, confirm the current examination and registration status directly with the Board before committing to a program start date. Applications continued to be accepted and processed during the blackout.

If RDAEF is the goal, the sequencing is worth knowing now: your RDA license is a prerequisite, and the sealants course you already need for the RDA application also serves the RDAEF pathway.

## Questions candidates actually ask

### Is there still a separate California RDA law and ethics exam?

No. The RDA General Written Examination and the RDA Law and Ethics Examination merged in 2018 into one Registered Dental Assistant Combined Written and Law and Ethics Examination. Law and ethics content is now a single weighted area of that exam — Area 4, 10% — which works out to roughly ten scored questions. If a resource tells you to book two written exams, it is describing a system that no longer exists.

### Is there a practical or hands-on RDA exam?

No. The RDA practical examination was suspended in 2017 and later eliminated. BPC §1752.1 requires written evidence of your eligibility pathway plus this written examination and nothing else. Study material that tells you to rehearse on a typodont is preparing you for an exam that does not exist.

### How many questions is the exam, and how long do I get?

125 multiple-choice items — 100 scored and 25 unscored pretest items you cannot identify while testing — in 3 hours, computer-based at a PSI test center, in English only. Older materials citing 140 or 150 questions describe a retired structure.

### Do I need 75% to pass the California RDA exam?

No. The passing standard is criterion-referenced, set with the modified Angoff method under [16 CCR §1031](https://www.dbc.ca.gov/), and results are reported pass/fail only. The old fixed percentage was repealed in 2022. A "75" printed on a score report is a placeholder code meaning you passed — not a percentage you had to reach. Any resource telling you how many questions you can afford to miss is working from a repealed rule.

### How much does the California RDA exam cost?

A **$120 non-refundable application fee** to the Dental Board of California, filed through BreEZe, plus a **PSI examination fee for each sitting**. PSI publishes this as $46.59, but $27.23 and $38.50 also circulate and the Board's applicant page does not state a figure at all — so treat $46.59 as the working number and confirm the exact current amount at the PSI payment step or in your current Candidate Information Bulletin. There is no separate initial license issuance fee. The much larger cost is the required board-approved course certificates.

### How do I qualify to sit for the exam?

Through one of the pathways in BPC §1752.1 as re-enacted by SB 1453 (operative July 1, 2025): graduation from a board-approved program; 15 months and at least 1,280 hours of certified work experience; a current DANB CDA certification; an alternative program of at least 500 didactic and laboratory hours plus 300 clinical chairside hours; a preceptorship of at least 500 clinical chairside hours plus 300 didactic hours; or the California RDH crossover route. Every pathway still requires this exam.

### Does a DANB CDA certification exempt me from the California exam?

No. A current DANB CDA makes you eligible to apply — it is one of the six pathways. You still file the Board application, pay the fee, clear the DOJ and FBI background check, and pass this California-specific written examination.

### What certificates do I need, and when do they expire?

Counted back from your application date: the California Dental Practice Act (2-hour) and infection control (8-hour) courses within **2 years**; coronal polishing and pit and fissure sealants within **5 years**; radiation safety within **10 years**; and current BLS with a **live, in-person skills session** — online-only CPR is rejected. If your eligibility window lapses and you reapply, every clock is re-checked against the new application.

### When do I get fingerprinted?

After you apply, not before. Submit the BreEZe application and the $120 fee first; the Board then sends you a Request for Live Scan Service form to take to an authorized Live Scan site. Getting printed early produces records with nothing to attach to. Out-of-state candidates use the Board's hard-card method with a $49 non-refundable processing fee, which takes considerably longer to clear.

### What is the pass rate on the California RDA exam?

The Dental Board's [June 2026 statistics report](https://www.dbc.ca.gov/formspubs/rda_062026.pdf) covers 263 candidates: **72% passed overall**, board-approved-program graduates passed at **79%**, work-experience-pathway candidates at **62%**, and repeat testers at **38%**. The Board publishes these [monthly](https://www.dbc.ca.gov/applicants/rda_written_exam_stats_2026.shtml), so read a few months before treating any single figure as a trend.

### Why do work-experience candidates fail more often?

On-the-job training teaches the protocols of one office and the preferences of one dentist; the exam tests the Board-approved, textbook version — standardized instrument and material names, the science behind cements, etchants, and curing, infection control as written in 16 CCR §1005 and Cal/OSHA's standard, and supervision categories as written in statute. The work for this cohort is translating hands-on competence into the exam's vocabulary and covering procedures their office never performs.

### How long should I study?

It depends on your pathway. A recent board-approved-program graduate can often work in one to two weeks focused on California law and the regulation-anchored parts of infection control. A work-experience or preceptorship candidate should plan four to six weeks covering the 50% Dental Procedures area and the 25% infection control area in depth. A repeat tester should plan three to four weeks across every area, weighted, having re-baselined with a timed mixed-area test first.

### How soon can I retake it if I fail?

Contact PSI to reschedule — a retake can typically be scheduled in about **7 to 10 business days** — and pay the PSI examination fee again. No new Board application and no new eligibility documents are needed inside your two-year window, and there is no published cap on attempts within it. If the window expires, the application is abandoned and you start over with a new application, a new $120, and refreshed certificates where the recency clocks ran out.

### Will my score report tell me which areas I failed?

No. As of 2026 the Board and PSI do not publish granular per-domain diagnostic feedback on failing reports, and the number printed on the report is a placeholder rather than your real score. Retakers have to self-diagnose against the published 2023 outline — which is why a cold, timed, mixed-area practice test is the right first move before restudying anything.

### Can an unlicensed dental assistant perform coronal polishing?

Yes, since January 1, 2025. BPC §1750(f)(4) permits an unlicensed dental assistant to perform coronal polishing before RDA licensure after completing a board-approved coronal polishing course, under **direct supervision**, with the dentist evaluating each patient — and only after the 8-hour infection control course and current BLS. Prep teaching polishing as an RDA-only duty is out of date. Do not over-correct, though: pit and fissure sealant placement is limited **by category** to an RDA, RDAEF, RDH, or RDHAP under BPC §1750.1(f), and no course changes that.

### Do I have to pay the Board again if I take longer than two years?

Yes. The eligibility window runs two years from when the Board receives your application. If you have not passed by then, the application is deemed abandoned: you file a new application, pay the $120 again, resubmit pathway documentation, and retake any course whose recency clock has run out — which for the Dental Practice Act and infection control courses is a real possibility at the two-year mark.

## Primary sources

- **DBC-RDA-OUTLINE** — [Dental Board of California — RDA Combined Written and Law and Ethics Examination Outline (2023 OPES occupational analysis)](https://www.dbc.ca.gov/formspubs/rda_exam_outline.pdf)
- **DBC-RDA-APPLICANTS** — [Dental Board of California — RDA licensure applicant page (pathways, required certificates, application flow)](https://www.dbc.ca.gov/applicants/become_licensed_rda.shtml)
- **DBC-RDA-STATS** — [Dental Board of California — RDA examination statistics, monthly reports (2026 series)](https://www.dbc.ca.gov/applicants/rda_written_exam_stats_2026.shtml)
- **DBC-RDA-STATS-0626** — [Dental Board of California — RDA examination statistics, June 2026 report (263 candidates, 72% passed)](https://www.dbc.ca.gov/formspubs/rda_062026.pdf)
- **BPC-1752-1** — [Business and Professions Code §1752.1 — RDA eligibility pathways, required course certificates, and the written examination requirement, as re-enacted by SB 1453 (operative July 1, 2025)](https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?sectionNum=1752.1.&lawCode=BPC)
- **DBC-DUTIES-2025** — [Dental Board of California — Table of Dental Auxiliary Duties Delegable by Supervising Dentist (effective January 1, 2025)](https://www.dbc.ca.gov/formspubs/pub_permitted_duties.pdf)
- **PSI-RDA-CIB** — [PSI — Candidate Information Bulletin and test-taker portal for the California RDA written examination (125 items, 3 hours, exam fee, scheduling and retakes)](https://test-takers.psiexams.com/)
- **SB-1453** — [SB 1453 (Ashby), Chapter 483, Statutes of 2024 — Dental Practice Act overhaul: sunset extension, Board composition, unlicensed-assistant infection-control timing, coronal polishing, license display, and the repeal and re-enactment of BPC §1752.1](https://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=202320240SB1453)
- **BPC-1750** — [Business and Professions Code §1750 — unlicensed dental assistant duties and employer training obligations, including the coronal polishing pathway at subdivision (f)(4)](https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?sectionNum=1750.&lawCode=BPC)
- **BPC-1750-1** — [Business and Professions Code §1750.1 — delegable basic supportive procedures, the never-delegable exclusions at subdivision (d), and the category restriction on pit and fissure sealant placement at subdivision (f)](https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?sectionNum=1750.1.&lawCode=BPC)
- **BPC-1752-4** — [Business and Professions Code §1752.4 — RDA duties and supervision levels as restructured by SB 1453, effective January 1, 2025](https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?sectionNum=1752.4.&lawCode=BPC)
- **CCR-1005** — [16 CCR §1005 — Minimum Standards for Infection Control (Dental Board of California)](https://www.dbc.ca.gov/lawsregs/)
- **CCR-1031** — [16 CCR §1031 — criterion-referenced (modified Angoff) examination passing standard, which replaced the fixed percentage cut score repealed in 2022](https://www.dbc.ca.gov/lawsregs/)
- **CCR-5193** — [8 CCR §5193 — Cal/OSHA Bloodborne Pathogens standard](https://www.dir.ca.gov/title8/5193.html)
- **BREEZE** — [California Department of Consumer Affairs — BreEZe online licensing system (RDA examination application filing)](https://www.breeze.ca.gov/)

## Disclaimers

- Dentovio is an independent publisher. It is not the Dental Board of California, PSI, or an official government service, and this guide is not legal advice.
- This guide summarizes publicly available California dental assisting law and official examination information as of the last verified date shown above. Laws, fees, and exam logistics change. Confirm current requirements with the Dental Board of California and your current PSI Candidate Information Bulletin before acting.
- This page was drafted with AI assistance, and every rule on it was verified against the primary sources listed above. Where published sources conflict — notably the PSI examination fee — this page says so rather than picking a number. Dentovio makes no pass guarantee, and all practice questions in its products are original exam-style material, never reproduced or reconstructed from a real examination.