4 KPIs Every Security Leader Should Track to Stop Turnover Before It Starts
The best security firms track these four KPIs to predict and prevent turnover before it happens. Learn the benchmarks that signal trouble.
If you have ever been blindsided by a wave of resignations, you know the feeling... you wish you had seen it coming. The truth is, in most security firms, the signs were there all along. They just were not being measured.
Belfry’s Turnover to Tenure report identifies four operational KPIs that act as early warning signals for disengagement. When you track these consistently and act quickly when they move in the wrong direction, you can reduce turnover and protect your bottom line.
Why Measurement Matters
In a high-turnover industry like contract security, guessing is expensive. Without hard data, you cannot separate normal fluctuations from signs of trouble. Metrics take the guesswork out of retention by:
- Making performance trends visible over time
- Helping supervisors spot patterns before they become crises
- Guiding targeted interventions rather than broad, costly fixes
KPI #1: Call-Off Rate
Target: Less than 3 percent weekly
The call-off rate is a leading indicator of disengagement. Belfry’s analysis shows a strong correlation between call-off rates and turnover (r = 0.68). When officers start calling off more often, overall churn tends to follow.
Why it matters:
- High call-off rates force overtime coverage
- Posts may be filled by unfamiliar officers, risking service quality
- Reliable officers get overworked, leading to more burnout
What to do if it spikes:
- Review scheduling predictability
- Address attendance policy compliance
- Look for site-specific issues causing dissatisfaction
KPI #2: Vacancy Fill Time
Target:
- Short notice posts: less than 4hours
- Advance posts: less than 24 hours
Vacancy fill time measures how quickly your team can cover open shifts. Slow fill times mean more overtime, higher stress on supervisors, and if left unchecked, a signal that your scheduling process is not keeping up with demand.
Why it matters:
- Short coverage gaps can still hurt client confidence
- Delays increase the chance of relying on un billed overtime
What to do if it slows down:
- Use digital shift offers... Belfry data shows they fill posts three times faster than phone calls
- Maintain a pool of officers interested in extra hours
- Use real-time availability tracking to cut lag time
KPI #3: First-90-Day Turnover
Target: Less than 15 percent quarterly
The first 90 days are the riskiest part of the employee life cycle. High turnover here often points to onboarding or early experience issues. And because you have invested recruiting time, training hours, and uniform costs before billing much revenue, these losses hurt disproportionately.
Why it matters:
- Early exits waste hiring and onboarding resources
- They are often avoidable with better first-day and first-week experiences
What to do if it rises:
- Audit your onboarding process for friction points
- Ensure payroll accuracy from the very first paycheck
- Assign mentors or onboarding buddies to new hires
KPI #4: Un billed Overtime Hours
Target: Trending down quarter over quarter
Not all overtime is bad, but when it is un billed, it is a hidden margin killer. High un billed overtime can be a symptom of turnover, poor scheduling efficiency, or lack of cross-trained staff.
Why it matters:
- Eats into profits without adding revenue
- Indicates operational inefficiencies that may also affect retention
What to do if it grows:
- Investigate if coverage gaps are driving extra hours
- Improve forecasting for known absences
- Use shift marketplace tools to cover posts without premium costs
Hypothetical Example: KPI-Driven Intervention
Consider a 250-officer firm that starts tracking these four KPIs. Within a quarter, they notice call-off rates have risen from 2.8 percent to 4.1 percent weekly, and vacancy fill times have stretched from 3.5 hours to 5 hours for short notice posts.
They respond by:
- Adding two weeks of schedule visibility for officers
- Implementing digital shift offers for all last-minute posts
- Conducting site-level check-ins to resolve officer concerns
Within two months, call-off rates drop to 2.6 percent and vacancy fill times fall back under the 4-hour target. This scenario is based on Belfry benchmarks and illustrates how KPI tracking leads to faster corrective action.
Connecting the Dots: KPIs Work Together
- No single KPI tells the whole story. For example:
- A rise in call-off rates often precedes higher turnover...
- Which can lead to slower vacancy fill times...
- Which drives more un billed overtime…
- And if that happens early in the employment cycle, it shows up in first-90-day turnover.
Tracking all four gives you a comprehensive view of operational health.
Best Practices for KPI Tracking
- Set Baselines. Start by measuring where you are now.
- Review Weekly. Waiting until quarter-end hides problems.
- Assign Accountability. Make one person responsible for each metric.
- Act Quickly. KPIs lose value if you do not respond to changes.
- Share Results. Show supervisors and officers how improvements are making a difference.
The ROI of KPI Tracking
Belfry’s KPI targets are not arbitrary...they are based on patterns observed across hundreds of security operations. Hitting these benchmarks not only reduces turnover but also lowers overtime, increases client satisfaction, and improves supervisor morale.
Your Next Step
Guessing at retention problems is expensive. Measuring them is the first step to fixing them.
📥 Download the full Turnover to Tenure report for Belfry’s KPI tracking templates and retention benchmarks.
Explore Belfry Reporting &Analytics to monitor these KPIs in real time and act before turnover hits.
