How to Use the Bradford Factor Calculator
The Bradford Factor Calculator gives HR managers a quick, objective measure of how disruptive an employee’s absence pattern is — not just how many days they have been absent.
- Enter Absence Spells — Input the number of separate absence episodes in the measurement period (e.g., each unconnected sick leave counts as one spell).
- Enter Absence Days — Input the total number of days absent across all spells.
- Read Results — The Bradford Factor Calculator displays the Bradford Factor score and assigns a risk level: Low, Medium, High, or Very High.
Use the Bradford Factor Calculator alongside your HR policy to decide when to conduct absence review meetings.
Formula & Theory — Bradford Factor Calculator
The Bradford Factor Calculator uses this core formula or rule:
Bradford Factor = S² × D| Symbol | Meaning |
|---|---|
| S | Number of separate absence spells |
| D | Total absence days in the period |
The squaring of S means that frequent, fragmented absences generate disproportionately high scores. For example, 10 spells of 1 day each yields a score of 100 × 10 = 1,000, compared to 1 spell of 10 days, which yields only 1 × 10 = 10.
Risk Bands
| Score Range | Risk Level |
|---|---|
| 0 – 50 | Low |
| 51 – 199 | Medium |
| 200 – 399 | High |
| 400+ | Very High |
Use Cases for the Bradford Factor Calculator
- HR Absence Management — Identify employees with high absence impact scores for targeted support or review using the Bradford Factor Calculator.
- Return-to-Work Interviews — Use Bradford Factor scores to structure return-to-work conversations and focus on attendance patterns.
- Policy Setting — Define trigger points for formal absence reviews based on Bradford Factor thresholds.
- Team Benchmarking — Compare Bradford Factor scores across team members to identify systemic attendance issues.
- Payroll Integration — Combine Bradford Factor data with payroll records to assess the financial impact of absenteeism.