Fatigue Management for Healthcare Shift Workers

The new Fatigue Code of Practice commencing February 2026 is the first approved code specifically addressing fatigue as a workplace hazard, and it has particular significance for healthcare because shift work, on-call arrangements, and extended hours are fundamental to healthcare service delivery. The code becomes legally binding under Section 26A from 1 July 2026, meaning failure to follow the code is a standalone offence unless the PCBU demonstrates an alternative measure providing equal or greater protection. The Fatigue Code requires PCBUs to identify work arrangements that create fatigue risks, assess the level of risk considering the nature of the work, the consequences of fatigue-related error, and the duration and timing of work periods, and implement controls that are proportionate to the risk. For healthcare, this means that roster design is no longer merely an industrial relations matter — it is a WHS compliance obligation. PCBUs must be able to demonstrate that their rostering practices have been assessed against the Fatigue Code and that identified risks are controlled to the extent reasonably practicable. Healthcare organisations that continue to roster workers for patterns known to create dangerous levels of fatigue without implementing any mitigating controls will face prosecution under both the code and the general duty of care.

Healthcare shift work creates fatigue through multiple interacting mechanisms that must be understood to manage the risk effectively. Circadian disruption from night shift work impairs cognitive function, reaction time, and decision-making during the circadian trough between 0200 and 0600, when the risk of errors and accidents is highest. Consecutive night shifts compound circadian disruption because the worker's body clock does not fully adapt to nocturnal waking during typical healthcare rotation patterns of two to four consecutive nights. Sleep debt accumulates when workers cannot obtain sufficient quality sleep between shifts, particularly during rapid roster rotation and when commute times reduce the available sleep window. Extended shifts beyond 10 hours duration are associated with increased error rates and injury risk, with the risk increasing exponentially after 12 hours. On-call arrangements disrupt sleep architecture even when the worker is not called, because the anticipation of a call prevents deep sleep. Early morning starts before 0600 truncate sleep when workers cannot advance their bedtime sufficiently to compensate. The interaction between these factors means that fatigue risk cannot be assessed from any single roster feature in isolation — it must be evaluated as a composite of shift duration, start and end times, rotation pattern, rest periods, and workload intensity.

The Fatigue Code requires PCBUs to consider evidence-based rostering principles when designing work schedules. Forward rotation (morning to afternoon to night) is preferred over backward rotation because it aligns with the natural circadian tendency to delay rather than advance sleep timing. Limiting consecutive night shifts to a maximum of three reduces cumulative circadian disruption and sleep debt. Minimum rest periods between shifts should provide at least 11 hours off duty, which allows approximately 8 hours of sleep opportunity after accounting for commute, meals, and domestic responsibilities. After a block of night shifts, a minimum of 48 hours off duty should be provided before the next working shift to allow circadian re-adaptation. Shift lengths should not routinely exceed 10 hours for day shifts and 8 hours for night shifts in clinical roles where the consequences of fatigue-related error include patient harm. On-call frequency should not exceed one in three as a sustained pattern, and workers who are called during an on-call period should have adequate rest before their next rostered shift. These principles must be balanced against operational requirements and workforce availability, but the Fatigue Code requires PCBUs to demonstrate that they have considered these principles and implemented them to the extent reasonably practicable.

Healthcare organisations must conduct fatigue risk assessments that evaluate the fatigue potential of their rostering arrangements and implement controls proportionate to the risk level. The assessment should use a validated fatigue risk scoring tool that considers shift duration, start and end times, rotation pattern, rest periods, consecutive working days, and the nature of work performed. Roles with high consequences of fatigue-related error — including roles involving clinical decision-making, medication administration, surgical procedures, patient handling, and driving — require more conservative fatigue limits than roles where the consequences of error are lower. Monitoring should include tracking of actual hours worked (including overtime and shift swaps), on-call activation rates and response times, fatigue-related incident and near-miss reports, and worker self-reported fatigue levels. Trend analysis should identify roster patterns, departments, or worker groups that are generating disproportionate fatigue risk. When monitoring reveals fatigue-related incidents or patterns of excessive hours, the PCBU must investigate the root causes and implement corrective actions, which may include roster modification, additional staffing, workload redistribution, or restriction of overtime and shift swaps. EHS Atlas provides roster analysis tools, fatigue scoring, and automated monitoring of working hours against defined limits.