![How Smart Rostering Reduced Overtime in Aged Care [Case Study]](/content/images/blog/aged-care-case-study-hero.svg)
What Is the Most Common Cause of High Overtime in Aged Care?
The most common cause is structural: a casual pool that is too small to absorb the full volume of permanent staff absences, combined with a reactive scheduling culture where gaps are filled by extending willing staff rather than replacing them. The short-term solution (extending a shift) is easier than the systemic solution (building a larger, better-coordinated casual pool) — but the short-term approach compounds until overtime becomes a chronic budget problem.
For many residential aged care facilities, overtime is not a crisis — it's a background constant. Staff get used to being asked to extend, managers get used to approving it, and the payroll line creeps upward each quarter. This case study examines how a systematic approach to roster design and casual pool management broke that cycle.
The Problem: Structural Overtime, Not Incidental Overtime
The facility in this case study — a 65-bed residential aged care provider in regional Victoria — had overtime running at approximately 11% of total wage cost. The facility director initially attributed this to a shortage of casual staff in the local labour market. A roster analysis revealed a different picture: the casual pool had 14 registered members, but only 4 were regularly deployed. The other 10 either received insufficient shift offers to maintain their availability or had drifted to competitors who offered more predictable hours.
The root cause was a cycle: the same reliable casuals were called first, they accepted frequently, they were called again, and the less-frequently-contacted casuals gradually reduced their availability. The roster manager was aware of the imbalance but had no system that surfaced it. For the compliance framework that shapes all aged care rostering decisions, see our aged care compliance guide.
The Intervention: Three Changes, Implemented in Order
Three changes were made over 12 weeks:
- Roster template redesign: Shift patterns were rebuilt from census data rather than historical habit. Two shift windows that consistently overstaffed by one FTE equivalent were reduced, freeing budget for casual backfill without net cost increase.
- Casual pool reactivation: All 14 casual pool members were contacted individually and offered a guaranteed minimum of 2 shifts per fortnight. Eight accepted. The shift offer distribution was restructured so all active casuals received comparable hours.
- Early-warning rule: Any shift vacancy (due to sick leave or annual leave) flagged in the system more than 24 hours ahead was required to be filled by a casual. Overtime was only authorised for same-day emergencies. This rule was communicated to all staff, reducing the expectation that overtime would be offered as a first response.
The Results
Over the following quarter, overtime as a percentage of wages fell from 11% to 7.6% — a 31% reduction. Care minutes compliance improved (more hours were delivered by rostered staff working at their regular classification rather than overtime-fatigued staff). Staff satisfaction scores for scheduling fairness increased in the quarterly pulse survey.
What Other Aged Care Providers Can Apply
The specific numbers will differ, but the structural pattern is consistent across most facilities experiencing chronic overtime: an underutilised casual pool, a reactive backfill culture, and a roster template that hasn't been reviewed against current census data. The intervention sequence — template review, then pool reactivation, then backfill policy — is scalable to any facility size. For a complete guide to building a safe, compliant healthcare roster, see our healthcare rostering guide.
Frequently Asked Questions
What causes excessive overtime in aged care facilities?
The most common causes are: an understaffed or poorly utilised casual pool, shift templates that don't reflect resident census, reliance on the same high-availability staff for all backfill (causing burnout and extended leave), and a reactive culture where the roster is rebuilt each week rather than maintained from a stable, optimised template.
How do you reduce overtime without risking coverage gaps?
Build the supply side first. Expand and activate the casual pool before tightening the overtime policy. Facilities that cut overtime without first building backfill capacity simply replace planned overtime with uncovered shifts and compliance risk. Increase casual pool coverage, then implement a policy that reserves overtime for same-day emergencies only.
What is the financial impact of a 30% overtime reduction in aged care?
For a facility with a $2.5 million annual wage bill where overtime runs at 10%, a 30% reduction saves approximately $75,000 per year. For a 65-bed facility at $2.4 million in wages, a 3.4 percentage-point reduction (as in this case study) saved $81,600 annually — achieved without reducing care hours or headcount.
How long does it take to see overtime reduction results from better rostering?
Facilities that implement census-based roster templates and a reactivated casual pool typically see meaningful overtime reduction within 6–8 weeks. Full results — including the staff behavioural shift away from expecting overtime as income — take 3–4 months to stabilise.
Identify Your Overtime Drivers Before the Next Payroll Comes In
GetMyRoster gives aged care managers real-time visibility of overtime accumulation, casual pool utilisation, and coverage gaps — so you can act on the data while there's still time to make a difference.
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