The CNA exam is considered moderate in difficulty. Most candidates who complete their training program pass on the first try, but the exam isn’t a formality either. In Oregon, for example, roughly 79% of first-time test takers passed the skills portion over a recent 12-month period, while those retaking it passed at lower rates (around 73% on the second attempt and 65% on the third). The written portion tends to have similar or slightly higher pass rates. In short, if you prepare seriously, you’ll likely pass. If you wing it, you might not.
What the Exam Looks Like
The CNA certification exam has two separate parts: a written (or oral) knowledge test and a hands-on skills demonstration. You need to pass both to get certified, but in most states you can pass them on different attempts. If you pass the written portion but fail skills, you only need to retake the skills portion.
The written exam consists of 70 multiple-choice questions, though only 60 are scored. The remaining 10 are pre-test questions used for statistical purposes, and you won’t know which ones they are. You get two hours to finish, which is generous. Most candidates finish well before time runs out. The questions cover topics like infection control, patient safety, communication, residents’ rights, and basic nursing procedures.
The skills exam is where more people struggle. You’ll be asked to demonstrate a handful of clinical skills (typically five) selected from a master list of 23 possible tasks. These range from handwashing and taking vital signs to repositioning a patient in bed or assisting with a wheelchair transfer. A nurse evaluator watches you perform each skill on a partner or mannequin and scores you against a checklist of required steps.
Why the Skills Test Trips People Up
The skills portion is harder than the written exam for most candidates because it requires you to perform under observation without skipping a single critical step. Certain mistakes are automatic failures regardless of how well you do everything else. These “critical steps” are mostly safety-related, and forgetting just one can cost you the entire skill.
For example, during a wheelchair transfer, you’ll fail automatically if you don’t lock the wheelchair brakes, don’t put the resident’s shoes on, or forget to place the call light within reach afterward. During handwashing, touching any part of the sink, flicking water off your hands, or washing for less than 20 seconds are all instant failures. For range-of-motion exercises, you must ask the resident about discomfort at least once or you fail the skill outright.
The call light is a recurring theme. Forgetting to place the call light within the resident’s reach at the end of nearly any bedside skill is an automatic failure. This is the single most common reason people fail individual skills, and it’s easy to forget under pressure because it feels like a minor detail. It isn’t. Evaluators treat it as a patient safety essential.
How Much Preparation You Need
Federal law requires a minimum of 75 hours of training before you can sit for the CNA exam, including at least 16 hours of supervised hands-on practice in a lab or clinical setting. Many states require significantly more. Before you ever touch a patient during training, you must complete at least 16 hours covering communication, infection control, safety procedures, promoting independence, and residents’ rights.
If your training program is solid and you paid attention, you already have the foundation to pass. The people who fail typically fall into one of two categories: those who didn’t practice the skills enough to perform them automatically under pressure, and those who studied the written material passively without really learning it.
For the written exam, the most effective approach is studying to understand concepts rather than memorizing answers. If you understand why you wash hands in a specific way or why bed rails need to be in certain positions, you can reason through unfamiliar questions. Practice tests help enormously because the real exam follows a predictable format and tests the same core concepts repeatedly.
For the skills portion, repetition is everything. Practice each of the 23 possible skills until the steps feel automatic. Have a friend or classmate act as your evaluator and call you out when you skip steps. Pay special attention to the beginning and end of each skill, since that’s where people forget universal steps like introducing yourself, explaining the procedure, providing privacy, and placing the call light.
What Happens If You Fail
Most states give you three attempts to pass each portion of the exam. This is the standard in California, Alaska, Alabama, Colorado, Georgia, Nevada, North Carolina, Virginia, South Carolina, Rhode Island, and the District of Columbia. A few states allow more: Maryland and Washington permit four attempts.
If you use up all your allowed attempts without passing, you’ll need to repeat an entire state-approved training program before you can test again. At that point, you must retake both portions of the exam, even if you previously passed one of them. This is a significant time and financial setback, which is why taking preparation seriously from the start matters.
You’ll typically need to pay a testing fee for each retake attempt, and scheduling availability varies by location. Some testing centers have wait times of several weeks, so a failed attempt doesn’t just cost money; it delays your ability to start working.
Managing Test Day Nerves
Performance anxiety is a real factor on the CNA exam, especially during the skills portion when someone is watching and grading you in real time. Candidates who knew the material in class sometimes blank under observation. Building a consistent pre-test routine helps. This could include deep breathing exercises, a quick review of your notes the night before (not a cram session), a full night of sleep, and a real meal before the exam.
During the skills test, take your time. There’s no bonus for finishing quickly, and rushing is how people skip critical steps. Talk through what you’re doing as you perform each skill. This helps the evaluator see that you know the procedure, and it also keeps you on track mentally. If you lose your place, narrating out loud can help you remember what comes next.
For the written portion, two hours for 70 questions means you have nearly two minutes per question. If a question stumps you, mark it and move on. Come back to it after you’ve answered everything else. Often, other questions on the exam will jog your memory or give you context clues.
Comparing It to Other Healthcare Exams
In the landscape of healthcare certifications, the CNA exam sits at the entry level. It’s substantially easier than the NCLEX for registered nurses or licensed practical nurses, which cover far more complex clinical reasoning and pharmacology. It’s also shorter and narrower in scope than exams for medical assistants or phlebotomists. The CNA exam tests foundational caregiving knowledge and safe task performance, not diagnostic thinking or advanced medical concepts.
That said, “entry level” doesn’t mean easy to pass without effort. The 20-35% of candidates who fail on a given attempt are proof of that. The exam is passable with focused preparation, but it demands that you actually know the material and can perform skills correctly under pressure, not just recognize the right answer in a study group.