By Paige Twenter

Fifteen percent of nurses are working a second job. Another estimate puts this at 50%.

This can create a patient safety blind spot that health system leaders are largely not equipped to see.

Here is what CNOs and other clinical leaders need to know:

1. The hours are invisibly stacking up for employers.

Internal scheduling safeguards, including policies limiting consecutive shifts or requiring minimum rest periods, apply only within a single organization. When a nurse caps out of allowable hours at one hospital and picks up a per diem shift at another, no single system can catch the cumulative fatigue load.

“Quite possibly the hospital might have put that rule in place and the RN working the second shift is coming from a different hospital because they have limited the number of shifts that their staff can work,” said Jennifer Mensik Kennedy, PhD, RN.

2. The financial pressure driving second jobs is structural, not marginal.

Per diem nurses working through gig staffing apps earn an average of $59 per hour, compared to a median staff nurse wage of $41.38 per hour. That equates to a 43% premium for per diem nurses.

Against that backdrop, 25% of nurses report their income barely or does not cover essential monthly expenses, and 37% say financial pressure drove them to work extra shifts or overtime in the past year, according to the 2026 State of Nursing Survey.

“Nursing is one of those areas where you can pick up extra shifts to pay down your debt faster,” said Dr. Kennedy. “Oftentimes those per diem shifts pay a lot more than their primary shifts.”

3. The patient safety research is unambiguous.

Amy Witkoski Stimpfel, PhD, RN, assistant professor at NYU Rory Meyers College of Nursing in New York City, said: “There’s only a certain number of hours in a day, and when you start to increase the number of hours you work, similar deleterious outcomes are likely to happen — errors, decreased concentration and impaired judgment and slower reaction times.”

4. There is no regulatory fix on the horizon.

There is no cross-employer database tracking total weekly hours for nursing staff, and no regulatory framework requiring one. Health systems can ask nurses to disclose secondary employment, and some already do, but enforcement and follow-through are inconsistent.

Dr. Kennedy noted that the cross-employer structure makes the problem especially hard to manage: nurses who have hit their single-employer shift limit may simply fill those hours elsewhere.

5. The workforce conditions make this worse before it gets better.

A 2026 Nurse survey found job satisfaction dropped 8 percentage points from 2025, and 43% of nurses say they are likely to leave the bedside within the year — up from 39% in 2025.

The nurses who are staying cite financial necessity as the top reason, selected by 41% of respondents. These are nurses staying at the bedside not because conditions have improved, but because they cannot afford to leave.