Bradford Factor calculator
Enter the number of separate absence spells and the total days absent to calculate the Bradford Factor score and identify the appropriate trigger level for management action.
Bradford Factor calculator
Enter the number of separate absence spells and total days absent
In the last 12 months (rolling period)
Across all spells in the period
Formula: S² × D
3² × 6 = 9 × 6
54
Bradford Factor score
Informal conversation
Return-to-work discussion. Raise awareness of the score without formal documentation.
Common UK trigger thresholds
Comparison examples (same total days, different frequency)
1 spell × 5 days
5
No formal action
3 spells × 5 days
135
Formal review — verbal warning
5 spells × 1 day each
125
Formal review — verbal warning
How the Bradford Factor works
S
Absence spells
Number of separate absence episodes in the rolling period
S²
Spells squared
Frequency is weighted by squaring — this is why frequency matters more than duration
D
Total days
Total calendar days absent across all spells in the period
The squaring of S is the formula's key design choice. Two employees can have the same total days absent but very different Bradford Factor scores depending on how those days are distributed across spells:
| Absence pattern | S | D | Score | Trigger |
|---|---|---|---|---|
| One 5-day absence | 1 | 5 | 5 | No action |
| Two 3-day absences (6 days) | 2 | 6 | 24 | No action |
| Three 2-day absences (6 days) | 3 | 6 | 54 | Informal talk |
| Five 1-day absences (5 days) | 5 | 5 | 125 | Verbal warning |
| Eight 1-day absences (8 days) | 8 | 8 | 512 | Formal management |
Important limitations
Disability-related absences
Absences connected to a disability should typically be excluded from Bradford Factor scoring. Applying the score to disability-related absences without adjustment may constitute disability discrimination under the Equality Act 2010. Always take HR and legal advice in these cases.
It is a trigger, not a verdict
A high Bradford Factor score triggers a conversation and investigation — not automatic disciplinary action. The score tells you there is a pattern; it does not explain whether the absences are genuine, preventable, or manageable. The conversation and return-to-work discussion provide the context.
Thresholds vary by organisation
There is no legally mandated set of Bradford Factor thresholds. The thresholds shown in this calculator are common UK contact centre benchmarks — your organisation's policy may differ. Always follow your own absence management policy, not a generic benchmark.
Rolling period matters
The Bradford Factor is typically calculated on a rolling 12-month period. Using a fixed annual calendar year instead of a rolling window creates a perverse incentive: an employee with multiple absences late in the year sees their score reset at the new year, removing any consequence. Rolling periods avoid this.
Bradford Factor questions
What is the Bradford Factor formula?
Bradford Factor = S² × D, where S is the number of separate absence spells and D is the total days absent in a rolling 12-month period. The squaring of S means frequency weighs much more heavily than duration: 5 spells of 1 day each scores 5² × 5 = 125; one spell of 5 days scores 1² × 5 = 5.
What are the Bradford Factor trigger levels?
Common UK benchmarks: 0–49 (no action), 50–99 (informal conversation), 100–199 (verbal warning), 200–399 (written warning), 400+ (formal absence management / dismissal risk). These vary by organisation. Follow your own policy, not a generic benchmark.
Should disability-related absences be included in the Bradford Factor?
No — disability-related absences should typically be excluded from Bradford Factor calculations. Applying the score without exclusion may constitute disability discrimination under the Equality Act 2010. Take HR and legal advice in any case where a known disability or health condition is involved.
Is the Bradford Factor a disciplinary tool?
It is a trigger tool, not a disciplinary verdict. A high score triggers a management conversation and investigation. The conversation establishes context — the score alone does not. The Bradford Factor is one input into absence management alongside return-to-work discussions, occupational health input, and personal context.
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