The Certified Nursing Assistant (CNA) provides direct patient care within healthcare settings. Achieving this designation requires successfully completing a state-approved training program. Following the classroom and clinical instruction, prospective CNAs must pass a comprehensive state certification examination to gain eligibility to practice. The period between finishing the training and passing this examination is a time-sensitive phase for candidates.
The Critical Time Limit: Federal and State Rules
Federal requirements establish minimum standards for nurse aide training and competency evaluation. The Omnibus Budget Reconciliation Act of 1987 (OBRA) mandates that individuals complete a minimum number of instruction hours before becoming eligible to test. This federal framework allows for state-level regulations concerning the testing timeline.
Most states grant candidates a standard testing window of 12 months following the official date of training program completion. This one-year period ensures the learned material remains fresh for the competency exam. Some jurisdictions, however, offer an extended eligibility period, which can stretch up to 24 months.
Candidates must verify their exact timeline with the appropriate state authority, usually the State Nurse Aide Registry or the Board of Nursing. Consulting this source is the only reliable way to confirm the precise expiration date for testing eligibility. Eligibility is strictly tied to the rules established by the state where training was completed.
How the Clock Starts and Eligibility Expires
The testing eligibility clock officially begins ticking on the documented completion date of the state-approved nurse aide training program. This date is formally recorded on the certificate or transcript provided by the training school. This completion date serves as the fixed starting point from which the state calculates the testing window.
If the established testing window elapses, eligibility immediately expires. Once the deadline passes, the candidate forfeits the opportunity to schedule and take the competency examination, and the state registry removes testing authorization.
The primary consequence of an expired eligibility window is the requirement to retake the entire state-approved training program. Candidates must complete both the classroom theory and the required clinical practice hours again. Only after successfully completing the full program a second time will a candidate regain authorization to attempt the state certification exam.
Registering for and Scheduling the Examination
Once training is complete, candidates must formally apply to the state’s designated testing vendor. Many states utilize national providers like Prometric or Headmaster, while others manage the process through a state-specific agency. The application typically requires submitting proof of training completion and clearance from a mandatory background check.
Candidates must submit the required examination fees along with their application materials. These fees cover both the written knowledge portion and the hands-on clinical skills portion of the exam. Prompt submission of all documentation ensures the state approves the Authorization to Test (ATT) letter.
Scheduling the test well in advance of the deadline is advisable, even if the candidate has many months remaining. Testing slots, especially for the clinical skills portion, can fill up quickly. Proactive scheduling helps secure a preferred date and provides a solid study deadline.
Understanding Retake Policies
Failing the initial certification exam attempt does not result in the loss of eligibility, provided the candidate is still within the original time window. State policies establish a maximum number of permitted attempts. Most jurisdictions allow candidates up to three attempts to pass both the written and skills portions of the exam.
These permitted retakes must occur within the initial eligibility period set by the state. The time limit and the attempt limit function as two separate constraints. For example, a candidate who fails three times still loses authorization to test, even if time remains in the eligibility window.
If a candidate reaches the maximum number of attempts without passing, they are typically required to complete remedial training. This additional training focuses on addressing specific knowledge or skills deficits identified during the failed examinations. Only after completing the required remediation can the individual schedule additional attempts.
Maintaining Your CNA Status
After successfully passing the competency exam and being placed on the State Nurse Aide Registry, certified individuals must adhere to specific maintenance requirements. Certification must be renewed on a periodic basis, commonly every two years. The renewal process confirms the CNA continues to meet state standards.
A primary requirement for renewal involves demonstrating recent, paid work experience as a nurse aide. Most states mandate that the CNA must have worked a minimum number of compensated hours—often 8 or more—during the 24-month renewal cycle. This ensures the individual maintains current practical skills in a healthcare setting.
Many states also require CNAs to complete a specified number of continuing education (CE) hours before each renewal. These hours ensure the professional remains current with best practices and evolving regulatory standards. Failure to meet either the work hour or CE requirement typically results in the certification expiring.

