Bradford Factor Calculator
Measure staff absenteeism with the Bradford Factor formula (S² × D). Spot frequent short-term absences before they disrupt your rota.
Already a WorkSchedule customer? View per-employee Bradford scores calculated automatically from your time-off data.
Absence details
Usually calculated over a rolling 12-month period.
Each separate period of absence, however short. 3 single-day absences = 3 spells.
The sum of all absent days across every spell.
Bradford Factor score
Formula: 3² × 6 = 54
The Bradford Factor weights frequent short absences heavily. Three separate 1-day absences (score 27) can flag more concern than one 3-day absence (score 3), even though the total days lost are the same.
Bradford Factor thresholds
Most UK employers set bands like these in their absence policy. Adjust to match your own policy.
No action required — routine monitoring.
Informal discussion — identify any underlying issues.
Formal review — set improvement targets and document.
Disciplinary process — formal warning and clear expectations.
Final warning or dismissal — follow full disciplinary procedure.
What is the Bradford Factor?
The Bradford Factor is a simple but powerful absenteeism metric used by UK employers to identify patterns of short-term sickness. It was developed at Bradford University and is now standard in HR and workforce management software.
The formula is S² × D:
- S = the number of separate absence spells (instances)
- D = the total number of days absent across all spells
Because S is squared, frequent short absences produce a much higher score than the same total days lost in fewer, longer spells. This is why the Bradford Factor is especially useful in hospitality — where a last-minute no-show on a Friday night is far more disruptive than a planned week-long absence.
Using the Bradford Factor in hospitality
Pubs, restaurants, cafés and hotels rely on tight staffing. One unexpected absence can mean the difference between smooth service and a stressful shift. The Bradford Factor helps managers:
- Spot employees with a pattern of frequent short absences before service is affected
- Start conversations early — often the underlying issue is manageable
- Build a fair, consistent absence policy backed by data
- Defend disciplinary decisions with an objective, widely recognised metric
How to apply it fairly
The Bradford Factor is a trigger, not a verdict. Always investigate the cause of absence before taking action. Some absences are protected (pregnancy, disability, statutory rights) and must be excluded from the calculation. Document every step and follow the ACAS disciplinary code if a score leads to formal proceedings.
Many hospitality employers calculate the Bradford Factor over a rolling 12-month period, which smooths out one-off spikes and focuses on persistent patterns. Publish your thresholds in your staff handbook so everyone knows where the lines are drawn.
Bradford Factor examples
| Scenario | Spells (S) | Total days (D) | Score |
|---|---|---|---|
| One 5-day flu absence | 1 | 5 | 5 |
| Three 2-day absences | 3 | 6 | 54 |
| Five 1-day absences | 5 | 5 | 125 |
| Ten single-day absences | 10 | 10 | 1,000 |
Frequently asked questions
What is the Bradford Factor?▼
The Bradford Factor is a formula used by UK employers to measure absenteeism: S² × D, where S is the number of separate absence spells and D is the total number of days absent. It weights frequent short absences more heavily than occasional long ones, making it especially useful in hospitality where cover is hard to arrange at short notice.
How do you calculate the Bradford Factor?▼
Multiply the number of separate absence spells (S) by itself, then multiply by the total days absent (D). For example, 3 spells of 2 days each gives 3² × 6 = 54. The same 6 days in one spell gives 1² × 6 = 6.
What is a good Bradford Factor score?▼
A score of 0–50 is generally considered acceptable. Scores of 51–100 trigger informal monitoring, 101–200 formal review, and over 200 serious disciplinary concern. Each employer sets their own thresholds in their absence policy.
Why does the Bradford Factor matter in hospitality?▼
In pubs, restaurants and cafés, one short-notice absence can leave a whole shift understaffed. The Bradford Factor highlights patterns of frequent short absences — the type most disruptive to hospitality rotas — so managers can act before service quality drops.
Can an employer dismiss someone based on the Bradford Factor?▼
The Bradford Factor is a trigger for review, not a reason for dismissal on its own. Employers must still follow a fair disciplinary process, investigate underlying causes (including disability or health conditions), and give warnings before any dismissal. ACAS guidance should be followed.
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