- What "Pass Rate" Actually Means for This Exam
- The 75% Passing Standard and Scoring Mechanics
- Where Candidates Lose Points: A Domain-by-Domain Look
- Retake Rules and How They Shape Your Odds
- The March 2026 Fee Schedule and Retest Strategy
- Remote Proctoring vs. Test Site: Does Format Change Outcomes
- A Domain-Weighted Study Timeline
- Frequently Asked Questions
- The knowledge exam requires 75% correct out of 75 questions in 60 minutes - no partial credit tiers exist.
- Basic Nursing Skills carries 15 questions, more than any other domain - master it first.
- Candidates get three attempts per component (knowledge and skills) within two years of finishing training.
- Retakes only require payment for the component you failed, not the entire exam.
What "Pass Rate" Actually Means for This Exam
Search for "HDMASTER-NA pass rate" and you'll find a lot of speculation but very little verifiable data specific to California's D&S-Headmaster Nurse Aide Knowledge Examination. That's actually useful information in itself: the California Department of Public Health and the approved testing provider, D&S Diversified Technologies/Headmaster LLP, do not publish a state-level percentage of candidates who pass on their first try. What they do publish - in the California Candidate Handbook, March 2026, version 9.0 - is the passing standard itself, the exact number of questions, and the official item allocation per subject area.
That means the most reliable way to talk about "the data" isn't a manufactured percentage. It's the structural facts that determine whether a given candidate passes: the 75-question format, the 60-minute time limit, the 75% cutoff, and the twelve content domains with their published item counts. Understanding these mechanics tells you far more about your actual odds than any unverified statistic floating around a forum. For a full breakdown of how difficult the exam tends to feel in practice, see How Hard Is the HDMASTER-NA Exam? Complete Difficulty Guide 2026.
The 75% Passing Standard and Scoring Mechanics
The knowledge examination is computer-delivered through TestMaster Universe (TMU), the platform used by D&S Diversified Technologies/Headmaster LLP for California testing. Every version of the exam draws from the same structure: 75 multiple-choice items, four answer choices each, a 60-minute limit, and a single passing threshold of at least 75%. There's no essay component, no short answer, and no partial credit for eliminating two wrong choices - you either select the correct option or you don't.
This single-threshold design has a practical consequence for how you should prepare: since there's no minimum score required in any individual domain, a strong performance in high-item domains can offset a shakier performance in smaller ones. That's not a reason to skip small domains - it's a reason to prioritize your study hours according to how many questions each domain actually carries. For the exact numbers behind the passing calculation, see HDMASTER-NA Passing Score 2026: Exactly What You Need to Pass.
Key Takeaway
Because the passing standard applies to the exam as a whole rather than domain-by-domain, spend your limited review time proportional to each domain's published item count - not evenly across all twelve.
Where Candidates Lose Points: A Domain-by-Domain Look
The handbook publishes exact item allocations for each of the twelve content domains. These are not calculated averages or estimates - they're the official counts candidates should plan around. Three domains account for nearly half the exam by themselves.
Domain 2: Basic Nursing Skills (15 items)
This is the single largest domain on the exam by a wide margin. It covers hands-on nursing fundamentals - vital signs, positioning, transfers, feeding assistance, and related bedside procedures.
- Expect scenario-based questions describing a resident situation and asking for the correct next action.
- Because it carries double the items of most other domains, weak preparation here has an outsized effect on your total score.
Domain 10: Resident Rights (8 items)
Tied for second-largest, this domain tests knowledge of protections under California law, including dignity, privacy, grievance processes, and freedom from abuse or restraint.
- Questions often hinge on recognizing a rights violation embedded in a short scenario.
- Overlaps with Communication and Role and Responsibility content, so studying them together is efficient.
Domain 12: Safety (8 items)
Also tied for second place, Safety covers fall prevention, body mechanics, infection hazards, and emergency response basics.
- Many Safety questions overlap conceptually with Infection Control (6 items), so reviewing them in the same study block reinforces both.
The remaining domains - Infection Control and Role and Responsibility (6 items each), Mental Health and Communication (6 and 5 items respectively), Care Impaired (5 items), and Aging Process and Restorative Care, Data Collection, Disease Process, and Personal Care (4 items each) - round out the exam. None of them is trivial, but none carries the weight of Basic Nursing Skills, Resident Rights, or Safety. For a full walkthrough of every domain with study guidance for each, see HDMASTER-NA Exam Domains 2026: Complete Guide to All 12 Content Areas.
| Domain | Published Item Count |
|---|---|
| Basic Nursing Skills | 15 |
| Resident Rights | 8 |
| Safety | 8 |
| Infection Control | 6 |
| Mental Health | 6 |
| Role and Responsibility | 6 |
| Communication | 5 |
| Care Impaired | 5 |
| Aging Process and Restorative Care | 4 |
| Data Collection | 4 |
| Disease Process | 4 |
| Personal Care | 4 |
Retake Rules and How They Shape Your Odds
One of the most underappreciated pieces of "pass rate" data is the retake structure itself, because it directly affects how much pressure any single sitting actually carries. Candidates get three attempts at the knowledge exam and three attempts at the manual skills exam, both within two years of completing an approved training program. That means a single rough day at the computer does not end your path to certification - but it does mean you should treat each attempt seriously, since the two-year window is fixed.
Retakes require payment only for the component that was failed - if you passed skills but not knowledge, you pay again for the knowledge exam only. This modular fee structure is worth understanding fully before you schedule a first attempt, since it changes the cost calculus of retesting versus over-preparing. For the complete breakdown of every fee and how retakes factor into total cost, see HDMASTER-NA Certification Cost 2026: Complete Pricing Breakdown.
The March 2026 Fee Schedule and Retest Strategy
Effective March 1, 2026, the standard knowledge examination costs $40, the audio knowledge examination costs $45, and the manual skills examination costs $100. Retakes use these same per-component fees - there's no separate "retest surcharge," but there's also no discount. If you fail the knowledge exam twice, you've paid the $40 (or $45 audio) fee three separate times by your third attempt.
This has a direct implication for how seriously you should prepare before your first sitting: spending an extra week reviewing Basic Nursing Skills and Resident Rights content is almost always cheaper than paying for a second knowledge exam attempt. If you plan to use the audio version of the exam, note that you must select that option before paying the testing fee - it isn't something you can add afterward. A dedicated study guide can help you avoid an avoidable retake; see HDMASTER-NA Study Guide 2026: How to Pass on Your First Attempt for a structured approach.
Remote Proctoring vs. Test Site: Does Format Change Outcomes
California's knowledge exam is offered both at physical test sites and through an approved remotely proctored option. Neither format changes the content, item count, or passing standard - the 75 questions and 75% threshold are identical either way. What changes is the logistics, and logistics failures are one of the most preventable reasons a candidate underperforms.
Remote candidates need two separate devices: a testing computer or tablet, plus a second smartphone or tablet camera positioned to show the candidate, the screen, the keyboard, and the mouse simultaneously. You must test alone in a quiet, secured area - no other people, no interruptions, no second monitor out of camera view. A basic calculator and scratch paper are allowed under the testing instructions, but at a test site the proctor supplies them; remote candidates should confirm ahead of time what's permitted in their setup. An inspected word-for-word translation dictionary is allowed, but dictionaries containing handwritten notes or definitions, and any electronic translator, are prohibited outright.
Key Takeaway
If you're testing remotely, run a full equipment check - both cameras, quiet room, calculator, scratch paper - the night before. Technical setup problems are an avoidable cause of a wasted attempt.
Beyond equipment, keep TMU test registration and your CDPH 283B certification application as two entirely separate processes that must still match exactly. Identifying details and required CDPH paperwork need to line up for registry processing, and mismatches here are a common - and entirely preventable - source of delay that has nothing to do with knowledge exam performance at all.
A Domain-Weighted Study Timeline
Generic study techniques like spaced repetition or timed practice blocks only help if they're pointed at the right content in the right proportion. Given that Basic Nursing Skills alone carries 15 of 75 questions - a full fifth of the exam - your calendar should reflect that weight rather than splitting time evenly across twelve domains.
Basic Nursing Skills
- Drill vital signs, transfers, positioning, and feeding-assistance scenarios - this domain alone justifies a full week given its 15-item weight.
Resident Rights and Safety
- Study these together; both carry 8 items and share overlapping scenario logic around dignity, restraint, and hazard prevention.
Infection Control, Mental Health, Role and Responsibility
- Each carries 6 items; group review sessions around scope-of-practice and standard-precaution scenarios.
Remaining Domains and Full Simulation
- Cover Communication, Care Impaired, Aging Process and Restorative Care, Data Collection, Disease Process, and Personal Care, then run a full 75-question timed simulation.
Practicing under realistic exam conditions matters as much as content review. A full-length simulator built around the actual 75-question, four-option, 60-minute format - and using the real domain allocations rather than guessed weights - gives you a far more accurate readiness check than generic flashcard apps built for other states or other certifications. You can run that kind of simulation at the main HDMASTER-NA practice test hub before scheduling your official attempt.
It's also worth stepping back and asking whether the certification is the right investment for your career goals in the first place, and what kind of employers actually hire based on it - see Is the HDMASTER-NA Certification Worth It? Complete ROI Analysis 2026 and HDMASTER-NA Jobs for that context, along with HDMASTER-NA Salary Guide 2026: Complete Earnings Analysis if compensation is part of your decision.
Frequently Asked Questions
The California Candidate Handbook and related CDPH/TMU materials focus on the exam's structure and passing standard rather than publishing a statewide pass-rate percentage. Treat any specific percentage you see elsewhere with skepticism unless it's sourced directly from the handbook.
You need at least 75% correct out of 75 questions, which works out to roughly 57 correct answers. There's no domain minimum - only the overall score matters.
No. Knowledge and manual skills are separate components. You retake only the component you failed, and you pay only that component's fee - $40 for standard knowledge, $45 for audio, or $100 for skills.
Three attempts at the knowledge exam and three at the manual skills exam, each within two years of completing your approved training program.
The content, question count, and 75% passing standard are identical for remote and in-person testing. The main risk with remote testing is logistical - camera positioning, a quiet secured room, and permitted materials - not the exam content itself.