To become a certified nursing assistant (CNA), you need to complete a state-approved training program of at least 75 hours, pass a two-part certification exam, clear a criminal background check, and get listed on your state’s nurse aide registry. Most people can go from starting training to working as a CNA in four to twelve weeks, depending on the program format.
Education and Age Requirements
Most states require a high school diploma or GED to enroll in a CNA training program, though this varies. Some states allow enrollment at age 16 with certain conditions, while others set the minimum at 18. Because these requirements differ, you’ll want to check with the agency that regulates nurse aide training in your state. Individual training programs sometimes set their own additional prerequisites, like a minimum reading level or completion of a basic math course.
What CNA Training Covers
Federal law requires CNA training programs to include at least 75 total hours, with a minimum of 16 hours spent in supervised clinical practice with real patients. Many states exceed this federal floor significantly. Some require 120 hours or more.
The classroom portion covers a broad curriculum designed to prepare you for hands-on patient care. Core topics include:
- Basic human anatomy and physiology, including how aging and illness affect body systems
- Personal care skills like bathing, feeding, dressing, grooming, and skin care
- Infection prevention, including hand hygiene, protective equipment, and handling bodily fluids
- Vital signs, including how to measure and document blood pressure, pulse, temperature, and pain
- Mobility and restorative care, such as safe transfers, walking assistance, range-of-motion exercises, and repositioning
- Resident rights and legal responsibilities, including privacy laws and recognizing abuse
- Communication and reporting, including how to document changes in a patient’s condition
- End-of-life care
- Caring for residents with special needs, such as dementia, sensory deficits, or altered consciousness
The clinical portion takes place in a healthcare facility, typically a nursing home, where you practice these skills under the supervision of a licensed nurse. You’ll work directly with residents during this phase.
Where to Get Trained
CNA training programs are offered through community colleges, vocational schools, the American Red Cross, and some nursing homes and hospitals. Community colleges tend to be the most affordable option. Some nursing homes offer free training in exchange for a commitment to work at that facility for a set period after certification.
Program costs vary widely. At a community college, you might pay a few hundred dollars. Private training schools can charge $1,000 or more. These costs typically don’t include the certification exam fee, textbooks, scrubs, or supplies like a stethoscope and blood pressure cuff.
The Certification Exam
After completing your training program, you take a state competency exam with two parts: a written (or oral) knowledge test and a hands-on skills demonstration. In many states, the exam is administered through a contracted testing company.
The written portion tests your understanding of the concepts from training. The clinical skills portion requires you to perform a selection of tasks drawn from a list of 23 essential skills. Each skill is broken into specific steps, and certain steps are marked as critical elements that you must complete correctly to pass that skill. You might be asked to take a blood pressure reading, assist someone from a bed to a wheelchair, or provide perineal care, for example.
In Pennsylvania, the combined written and skills exam costs $135. If you fail one portion, you can retest on just that part for $50 (written) or $85 (skills). Fees differ by state but generally fall in a similar range. Most states give you three attempts to pass before requiring additional training.
Background Check and Health Screenings
Every state requires a criminal background check before you can work as a CNA. This typically involves fingerprinting and a search of both state and federal criminal databases. Facilities that receive Medicare or Medicaid funding are required to verify that their nurse aides have clean records. Certain criminal convictions, particularly those involving abuse, neglect, theft, or violence, can disqualify you from certification.
Most employers also require health screenings before your first day. A tuberculosis (TB) test is standard, and many facilities ask for proof of current immunizations. Some programs require a physical exam confirming you can handle the demands of the job, and drug screening is common at the employer level.
Physical Demands of the Job
CNA work is physically intense, and training programs expect you to be capable of meeting those demands. The job involves standing and walking for most of a shift, which often runs 8 to 12 hours. You’ll use your muscles to lift, push, pull, and reposition patients. Core and lower back strength matters because you’re supporting your body (and often another person’s weight) for extended periods. Stamina is a real requirement. You need to stay physically active for hours without becoming fatigued or short of breath.
There’s no universal “minimum lifting weight” that every state requires, but job postings commonly list 35 to 50 pounds as a baseline. In practice, you’ll often assist patients who weigh considerably more, though proper body mechanics and team lifting techniques are part of your training.
Getting on the State Registry
Once you pass both parts of the exam, your name is added to your state’s nurse aide registry. This is the official list of people who meet state and federal requirements to work as a CNA. Employers check this registry before hiring. Without an active listing, you cannot legally work as a nurse aide in a Medicare- or Medicaid-certified facility.
Some states also offer alternative pathways to the registry. Nursing students who have completed certain clinical coursework, for instance, can sometimes apply for a training waiver and go directly to the competency exam. Licensed nurses in good standing can also request registry listing without completing a separate CNA program.
Keeping Your Certification Active
CNA certification isn’t permanent. You need to renew it, typically every two years. Renewal requirements vary by state but generally involve proof that you’ve been actively working as a nurse aide and that you’ve completed continuing education. In Texas, for example, renewal requires at least 24 hours of in-service education every two years, including specific training in geriatric care and dementia.
If your certification lapses because you haven’t worked or haven’t completed the required education, most states require you to retake the competency exam to get back on the registry. Keeping up with your continuing education hours while you’re employed is far simpler than starting the testing process over.