Ask most people how a professional license “expires” and they’ll describe a calendar: you get a notice, you pay a fee, you renew by a certain date. CNA certification frequently doesn’t work that way. Instead of a pure date-based expiration, many states tie your active registry status to documented hours of paid nurse aide work within a rolling window — meaning your certification can lapse even if you never missed a renewal deadline, simply because you didn’t work enough hours in the field. This is one of the most misunderstood parts of CNA licensing, and it varies enough by state that a general answer isn’t useful. Here’s how four states — with genuinely different models — actually handle it, based on our verified CNA requirements hub records.
Why this rule exists at all
The underlying idea traces back to a federal concept: nurse aides are meant to stay on a state’s Nurse Aide Registry only if they’re actively working in the field, since the registry exists to verify competency for employers, not to function as a permanent credential. States implement that idea very differently — some with a fixed renewal date and a separate lapse rule running in the background, some with no fixed date at all, and some blending the two.
Nebraska: no fixed expiration date, just a rolling 24-month work window
Nebraska has no calendar-based renewal cycle for nurse aides at all. Nebraska’s Department of Health and Human Services states plainly: “Expiration dates — none noted unless lapsed or ineligible.” A nurse aide’s registry status stays Active for as long as they’ve worked as a nurse aide in a paid position within the past 24 months at an approved employer. If that 24-month window closes without qualifying work, status changes to Lapsed, and the individual must retest to reactivate — there’s no separate renewal fee or paperwork cycle to track, but there’s also no calendar deadline reminding you the clock is running.
Washington: a fixed annual date, plus a separate work-hours safety net
Washington takes a hybrid approach. Nursing Assistant Certified (NAC) credentials renew annually on the holder’s birthday, for a $95 fee, with no continuing-education-hour requirement attached to that renewal. Separately, Washington also maintains an OBRA Registry (operated by DSHS) that’s required to work in skilled nursing facilities and nursing homes — and that registry status expires independently if a nurse aide goes more than 24 months without paid nursing-assistant work, requiring retesting or retraining-plus-retesting to reactivate. In other words, Washington CNAs can keep their NAC certification current with a simple annual fee, but still lose their ability to work in a nursing home specifically if they stop working in the field for two years.
Missouri: renewal is the work-hours documentation
Missouri folds the work-hours requirement directly into the renewal itself, rather than running it as a separate parallel system. Missouri CNAs must renew their eligibility every 24 months by documenting at least 8 consecutive hours of paid nurse aide work during the previous 24 months — a paystub, a W-2, or an employer letter — plus a $20 fee submitted electronically through the state’s TMU portal. There’s no continuing-education-hour requirement on top of that; the work documentation is the renewal requirement. Eight hours across two years is a low bar in absolute terms, but it means someone who takes an extended, fully non-CNA career break can still lose their certification even without ever missing a renewal notice, since the trigger is work hours rather than a payment deadline.
Rhode Island: a fourth model, based on training hours rather than work hours
Rhode Island illustrates a genuinely different approach — one that isn’t about work hours at all. Rhode Island licenses renew on a fixed biennial cycle, expiring every two years on June 30, with a $35 renewal fee due by June 15 to allow processing time. What Rhode Island requires instead of documented paid work is 12 hours of in-service training per year (24 hours across the two-year cycle), completed at the CNA’s employing facility. That’s a continuing-education model, not a work-hours model: a Rhode Island CNA who works full time but skips the required in-service training can be out of compliance at renewal, while a CNA in Nebraska or Missouri who completes plenty of training but doesn’t log the minimum paid hours would be the one at risk there. The two models test for different things — Rhode Island cares whether you kept learning; Nebraska and Missouri care whether you kept working.
What this means if you’re planning around your certification
If you’re a CNA who’s stepping away from the field temporarily — for school, a different job, a family situation — the calendar-renewal mental model can be actively misleading. In a state like Nebraska or Missouri, missing the underlying work-hours threshold puts your certification at risk even if there’s no bill or notice to miss. In a state like Washington, your NAC certification itself stays current with the annual fee regardless of work status, but your ability to work in a nursing home specifically depends on the separate OBRA clock. The practical takeaway is the same everywhere, though: know which model your state uses before you assume “I paid my renewal fee” is the whole story.
Check your specific state
Renewal cycles, work-hour thresholds, and fees vary enough across states that it’s worth checking your own state directly rather than assuming another state’s model applies. Our CNA comparison table covers renewal cycles and fees across all 51 jurisdictions, and every individual state page traces its renewal rules back to the state health department or nursing board that publishes them. For more on how we source and date these figures, see our methodology.