In early 2024, NHS England launched a six-month pilot exploring a four-day working week for nursing staff across 34 hospital trusts. The results, released in late 2024, have generated both optimism and caution: 73 percent of participating nurses reported improved wellbeing, but patient satisfaction scores dipped slightly. Only 12 of the 34 trusts have chosen to continue the arrangement beyond the pilot phase. The data, covering roughly 8,000 nurses, is being analysed by health economists and workforce planners. But the split among trusts reflects a deeper uncertainty about how to reconcile staff needs with patient care continuity.

NHS pilot data shows mixed results on four-day week

The pilot, which ran from March to September 2024, allowed nurses to work four ten-hour shifts instead of five eight-hour ones, with no reduction in pay. Early results indicate that 73 percent of nurses reported lower emotional exhaustion and better work-life balance. Sick leave fell by roughly 15 percent in participating wards compared with control wards.

However, patient satisfaction scores on some measures — particularly around continuity of care and response times — dipped by about 2 to 3 percentage points in trusts that implemented the four-day week across multiple wards. The small decline was not uniform; some units saw no change, while others, especially emergency departments, experienced more noticeable drops. For instance, at one large teaching hospital, satisfaction with nurse availability fell by 5 percentage points in the emergency department, while medical wards saw no significant change. The variability suggests that the model's success depends heavily on ward type and patient acuity.

Only 12 of the original 34 trusts opted to extend the trial beyond September. Reasons cited included difficulty maintaining handover quality, higher overtime costs, and concerns about covering night shifts and weekends. The remaining 22 trusts either returned to standard scheduling or adopted more limited flexible-hour arrangements. Among those that discontinued, some reported that the compressed week led to increased reliance on agency staff, which eroded continuity and raised costs.

NHS England has not yet released a full evaluation, but preliminary data suggests that the benefits for staff are real, though the impact on patient experience is more variable. Some trusts are now combining four-day week options with other flexibility measures, such as self-rostering and compressed hours, to tailor schedules to ward needs. For example, a trust in the Midlands introduced a hybrid model where nurses could choose between a four-day week and a nine-day fortnight, allowing more flexibility while maintaining coverage.

Trusts that adopted cite staff retention gains

University Hospitals Plymouth NHS Trust, which piloted the four-day week in two medical wards, reported a 30 percent drop in nursing turnover during the trial period. The trust’s chief nurse noted that the scheme had become a recruitment talking point, particularly among younger nurses who value work-life balance. The trust also saw a 25 percent reduction in sickness absence, contributing to lower overtime costs.

Barts Health NHS Trust in London saw a similar reduction in sick leave, with some wards reporting a fall of around 20 percent. Managers there said the four-day week helped retain experienced nurses who were considering leaving the profession. The trust is now exploring whether to extend the model to other departments, including surgical wards and outpatient clinics.

In a competitive London labour market, the four-day week has provided a distinct recruitment advantage. Some trusts reported that job adverts mentioning the option received twice as many applications as standard postings. At one trust, the number of applicants per nursing vacancy rose from 5 to 12 after introducing the four-day week. The Royal College of Nursing has cautiously supported the trials, but called for a national evaluation before widespread adoption.

The union’s position reflects a broader tension: local successes are encouraging, but without standardised metrics and long-term outcome data, it is difficult to know whether the benefits can be scaled. The RCN has also pointed to international examples where shorter workweeks in healthcare required careful implementation to avoid unintended consequences. For instance, in Sweden, a trial of six-hour shifts in a nursing home showed improved staff wellbeing but increased costs due to the need for more staff.

Sceptics warn of continuity and cost risks

NHS Providers, the membership organisation for hospital trusts, has warned that four-day weeks can create handover gaps, especially when staff on different schedules overlap only briefly. In nursing, continuity is critical for patient safety and for building trust with patients, particularly those with complex needs. A handover that is rushed or incomplete can lead to medication errors or missed observations.

Extended shifts — ten or even twelve hours — raise concerns about fatigue. Some studies suggest that longer shifts increase the risk of errors, although the pilot data did not show a clear signal in adverse events. The British Medical Association has opposed similar arrangements for junior doctors, citing evidence that long hours impair performance. However, proponents argue that a four-day week with ten-hour shifts results in fewer total hours per week than the standard five-day week, potentially reducing cumulative fatigue.

Backfill costs are another sticking point. Some estimates put the annual cost of covering gaps from a four-day week at around £12 million per trust, once overtime and agency staff are factored in. Trusts that continued the pilot reported that these costs were partly offset by reduced spending on recruitment and temporary staff. For example, one trust calculated that the reduction in agency spending saved £1.5 million over six months, covering most of the backfill costs.

Patient groups have flagged potential delays in appointments and discharges when key staff are absent on their fifth day. The charity Healthwatch England noted that while staff wellbeing is important, patients must not bear the cost. The mixed patient satisfaction data suggests that the balance is not yet fully understood. Some trusts have implemented a 'no detriment' policy, ensuring that patient-facing services are not reduced even if staff are on a four-day week.

Burnout epidemic drives search for new models

The NHS staff survey for 2024 found that 44 percent of staff reported feeling unwell due to work-related stress, a figure that has risen steadily since 2020. Nursing vacancy rates in England stand at 9.3 percent, meaning roughly 40,000 nursing posts are unfilled. The four-day week is one of several interventions being tested to address this crisis.

Other models include flexible hours, part-time roles with benefits, and annualised hours contracts. Some trusts have introduced self-rostering systems that allow nurses to choose their shifts within a framework. The King’s Fund, a health think tank, has called for a system-wide workforce redesign rather than piecemeal trials. They argue that a combination of measures, including better pay, improved working conditions, and career development, is needed.

The four-day week appeals because it addresses a root cause of burnout: the relentless five-day schedule that leaves little time for recovery. But as the pilot data shows, it is not a silver bullet. In some settings, the compressed week may increase stress on the days worked, and not all nurses prefer it. A survey of nurses in the pilot found that while 73 percent reported improved wellbeing, 15 percent said they felt more tired on the longer shifts, and 12 percent reported no change.

The search for new models is urgent, but the evidence base is thin. Randomised controlled trials in real hospital settings are difficult to run, and most data comes from observational pilots. The challenges of implementing workforce changes in healthcare are well documented, and the four-day week is no exception. For example, a trial in a neonatal unit found that the four-day week led to staffing gaps during weekends, requiring mandatory overtime.

Iceland's shorter workweek offers cautionary lessons

Iceland’s large-scale trials of a shorter workweek, conducted between 2015 and 2019, involved more than 2,500 public-sector workers, including nurses and other healthcare staff. Productivity was maintained or improved in most settings, but healthcare presented unique challenges.

In hospitals, shift coverage required overtime, and some nurses reported that compressed schedules did not reduce overall fatigue. The Icelandic nurses’ union has continued to negotiate implementation, with some municipalities adopting reduced hours in specific units while others paused the experiment. For instance, in Reykjavik, a trial in a geriatric ward showed improved staff morale but required a 10 percent increase in staffing levels to maintain coverage.

The Icelandic experience suggests that the four-day week can work in healthcare, but it requires careful design. Simply shortening the week without adjusting staffing ratios or shift patterns can lead to understaffing on the remaining days. Iceland's data also showed that patient-facing roles may need different approaches than office-based ones. For example, administrative staff adapted more easily to the shorter week than nurses.

For UK trusts, the Icelandic precedent reinforces the need to measure outcomes beyond staff satisfaction. Patient safety, waiting times, and the quality of care must be tracked alongside employee wellbeing. The long-term effects of schedule changes on health outcomes are still being studied. A follow-up study in Iceland found no increase in adverse events in units that adopted shorter workweeks, but the sample size was small.

What the data does and doesn't tell us

The NHS pilot was not a randomised controlled trial. Trusts self-selected into the programme, and outcome measures varied across sites. Some trusts tracked sick leave and turnover; others also surveyed patient experience. This inconsistency makes cross-trust comparisons difficult. For example, one trust measured patient satisfaction using the Friends and Family Test, while another used a custom survey, complicating aggregation.

The pilot covered only six months, too short to assess long-term effects on patient outcomes or career longevity. Economic modelling is incomplete: while some trusts reported net savings from reduced turnover, others saw higher agency costs. A preliminary analysis by the Nuffield Trust suggested that the net cost impact could range from a saving of £500,000 to an additional cost of £2 million per trust annually, depending on local factors.

Another limitation is the lack of data on the impact of the four-day week on different patient groups. Elderly patients or those with chronic conditions may be more sensitive to changes in continuity of care. The small dip in satisfaction scores could be a signal worth investigating. For instance, patients with dementia may experience distress when faced with unfamiliar staff, and continuity is especially important for them.

Despite these gaps, the pilot provides the largest real-world dataset on shorter workweeks in acute nursing to date. It offers a starting point for trusts considering the switch, but it does not provide clear guidance on whether the model is safe or cost-effective at scale. The data suggests that the four-day week is not a one-size-fits-all solution, and its success depends on implementation details such as shift length, staffing levels, and ward type.

Practical steps for trusts considering the switch

Trusts that are exploring a four-day week should start with a voluntary pilot on a single ward or unit, ideally one with stable staffing and manageable patient acuity. This allows for close monitoring of both staff and patient metrics before wider rollout. For example, a medical ward with a low turnover of patients may be a better candidate than a busy emergency department.

Aligning the new schedule with electronic rostering systems is essential to avoid scheduling conflicts and ensure adequate coverage. Trusts should also engage local union representatives early, as staff buy-in is critical for success. The Royal College of Nursing recommends a phased approach over 18 months, with regular reviews and adjustments based on data.

Monitoring should include not only staff wellbeing and turnover but also patient safety indicators, such as falls, medication errors, and readmission rates. Patient experience surveys should be administered frequently during the pilot. Some trusts have found that combining the four-day week with other flexibility options, such as part-time compressed hours, improves uptake. For instance, offering a choice between a four-day week and a nine-day fortnight can accommodate different preferences.

Finally, trusts should be prepared to abandon the model if data show harm. The goal is to improve care for patients while sustaining the workforce, not to impose a preferred schedule. The mixed pilot results suggest that the four-day week is a promising tool, but one that must be tailored to context. A trust in the North West, for example, discontinued the pilot after three months because of a rise in handover-related incidents, highlighting the need for ongoing evaluation.

This article is for informational purposes only and does not constitute professional advice. NHS staff should consult their employer and union before making scheduling changes.