What is a 'bad' Bradford score?
Typically: 0-50 (Good), 51-200 (Concern), 201-499 (High impact), 500+ (Severe impact). Triggers for warnings often start around 50-100 points.
Calculator
Enter your values
How many separate times was the person absent?
Total number of days off work
Analysis
Interpretation of the current calculator output
Enter values to see detailed analysis and insights.
How to Use
Step-by-step instructions
- 1Enter number of separate absence instances (spells)
- 2Enter total days absent
- 3Review the Bradford Factor score
- 4Check the risk level and recommended action
- 5Use to identify patterns of short-term absenteeism
Bradford Factor Formula
The formula weights frequency of absence much higher than total duration. Frequent short absences disrupt business more than one long absence.
B = S² × DVariables:
BBradford Factor ScoreSSpells (instances) of absence over a set period (usually 52 weeks)DTotal number of days absent over the same periodExample
Absence Comparison
Inputs:
Employee A:1 spell, 10 days total
Employee B:5 spells, 10 days total
Steps:
- 1.Employee A: 1² × 10 = 1 × 10 = 10 points (Low risk)
- 2.Employee B: 5² × 10 = 25 × 10 = 250 points (High risk)
- 3.Result: Employee B is 25x more disruptive despite same total days off
Result:
Frequency matters more than duration
Frequently Asked Questions
Is the Bradford Factor fair?
It's a useful tool but shouldn't be used in isolation. It doesn't account for disability, chronic illness, or authorized leave. Always investigate reasons behind absences.
Why square the spells?
Squaring the number of spells (S²) mathematically penalizes frequent short absences, which are considered more disruptive to planning and productivity than fewer long absences.