How Much Training You Actually Need
Federal rule (CMS) sets a floor of 75 clock hours for any nurse aide training program, including at least 16 hours of hands-on supervised practice. States are free to require more: 19 states keep the 75-hour federal minimum, while the other 31 require anywhere from 80 to 180 hours. Missouri requires 175 hours, and Maine requires 180, the highest in the country. Clinical (hands-on) hours also vary by state, up to 100 hours in some. The program itself has to be on your state’s approved list, whether it’s run by a community college, a vocational school, or an employer like a nursing home.
What the Exam Actually Tests
Almost every state splits the exam into two separate parts. The first is a written or oral knowledge test, usually multiple-choice, covering patient care basics, safety, infection control and communication. The second is a skills exam: an evaluator watches you perform a handful of randomly selected hands-on tasks from a longer list, following a strict checklist. Hand hygiene is graded on almost every task, and skipping it is one of the most common reasons candidates fail a skill they otherwise knew how to do.
If You Don’t Pass the First Time
Most states let you retake only the part you failed, not the entire exam, and most cap the number of attempts, commonly around three, within a set window, often two years, before you’re required to redo the training. That’s the main reason practicing with material that mirrors the actual exam format, instead of a general textbook, makes a measurable difference for most candidates.
Staying Certified Afterward
Passing the exam gets you onto your state’s nurse aide registry, but that status isn’t permanent. Most states require renewal roughly every two years, and the requirement to keep it active is usually proof of paid work as a nursing assistant during that period, not a repeat exam. Go too long without working in the role and you may need to retest.
What This Costs, Realistically
Training itself is frequently free or low-cost when it’s offered through a community college workforce program, a vocational school with financial aid, or directly by an employer that sponsors new hires, since some nursing homes and home care agencies cover it in exchange for a work commitment. The exam fee is separate from training and is paid to the testing vendor, commonly Prometric, Pearson VUE or D&D Diagnostics, typically landing somewhere in the $80 to $150 range depending on the state.
Where to Go From Here
Given how much of this varies by state, the fastest way to confirm your exact hours, fees and testing vendor is your state’s board of nursing or health department page. The practice format above matches what most states actually use for the written portion, so it’s a useful starting point no matter where you’re testing.
This page provides general informational content about the CNA certification process nationally. Requirements vary by state, confirm exact hours, fees and testing vendors with your state’s nurse aide registry before registering. We are not affiliated with, endorsed by, or acting on behalf of any certification board, school, or testing organization mentioned or implied on this page. We do not administer exams or guarantee certification outcomes.