Calculate the Bradford Factor score to measure employee absenteeism impact. A powerful HR tool that emphasizes the disruptive effect of frequent short absences.
Last updated: March 2026
Separate occasions of absence in the period (e.g., 3 different times off work)
Total number of days absent across all spells
The Bradford Factor is a formula used in human resource management to measure worker absenteeism. Developed in the 1980s at Bradford University School of Management, it is designed to identify persistent short-term absence patterns that can be more disruptive to organizations than longer single absences.
The key insight behind the Bradford Factor is that frequent short absences (e.g., ten separate one-day absences) are typically more disruptive to an organization than one longer absence (e.g., one ten-day absence). This is because each separate absence requires management intervention, work reallocation, and disrupts team continuity.
The formula is: S² × D, where S is the number of spells (separate absence occasions) and D is the total number of days absent over a set period (typically 52 weeks). By squaring the number of spells, the formula heavily weights frequency of absences.
Note: Organizations should set trigger points based on their specific needs and culture.
Key Insight: Both employees were absent for 10 days, but the first employee's frequent short absences resulted in a Bradford Factor 25 times higher! This demonstrates how the formula emphasizes the disruptive nature of frequent absences.
The Bradford Factor is a tool, not a punishment. It should be used alongside other attendance management approaches. Always consider individual circumstances, including legitimate medical conditions and protected absences.
Many organizations exclude pregnancy-related absence, disability-related absence covered by law, jury service, and authorized leave. Check your local employment laws and consult with HR or legal counsel.
Most organizations use a rolling 52-week period and review monthly or quarterly. More frequent reviews help identify patterns early, but avoid being overly reactive to short-term fluctuations.
The Bradford Factor should trigger reviews and discussions, not automatic discipline. It's an indicator that requires investigation. Always follow proper disciplinary procedures and consider individual circumstances.
Chronic conditions may be protected under disability laws. Use the Bradford Factor to identify attendance patterns, but always accommodate legitimate medical needs and comply with employment law.
No. Organizations set their own trigger points based on industry, role criticality, and culture. Manufacturing might use stricter triggers than office environments. Adjust to fit your context.
The formula itself doesn't distinguish between reasons. However, your HR process should. Use the Bradford Factor to identify patterns, then investigate causes and address underlying issues.
Yes! Consistently high Bradford Factors across a team can indicate poor management, workplace stress, bullying, or inadequate working conditions. Investigate both individual and systemic causes.
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