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UK Bradford Factor Calculator for Absence Management
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How do you calculate the Bradford Factor
Enter absence count
Add the number of separate absence instances to begin calculating the Bradford score.
Add days absent
Enter the total number of days absent across the same period.
Apply the Bradford formula
We square the number of absence instances and multiply it by the total days absent.
Show the final score
The result updates instantly, helping you spot patterns of frequent short-term absence.
Calculate Your Bradford Factor
Enter a few details to instantly see the Bradford Factor.
What is the Bradford Factor?
The Bradford Factor is a formula used in HR to measure employee absence, with a focus on frequent unplanned absences over a rolling 52-week period.
It helps employers understand how disruptive absence patterns may be to the wider business. In general, the more separate bouts of absence someone has, the higher their score will be.
This makes it a useful way to spot repeated short-term absence, monitor patterns, and support more informed absence management.
Why the Bradford Factor matters
The Bradford Factor is designed to highlight absence patterns that may have a greater operational impact on your business.
Frequent short absences are often seen as more disruptive than one longer period away, which is why the score increases more sharply as the number of absence instances rises.
How scores behave
Two employees might have the same total number of days off, but receive very different Bradford scores depending on how those days are split across the year.
For example, 7 days off in 1 absence scores far lower than 7 days spread across 2 or 3 separate absences.
How the score is calculated
The Bradford Factor uses a simple formula:
Here, E is the number of absence instances and D is the total number of days absent in a 52-week period.
What do Bradford scores mean?
Thresholds vary between organisations, but these ranges are often used as a general guide when reviewing absence patterns.
0–50
Usually considered low and acceptable, indicating minimal absenteeism.
51–200
May raise concern, particularly where absence patterns are frequent or unexpected.
201+
Often seen as high and may trigger further review, support, or formal attendance discussions.
Example of a Bradford calculation
If an employee has taken 7 days off in the last year, their score depends on how many separate absences that involved.
One absence scores 7, two absences score 28, and three absences score 63. The total days are the same, but the score rises because the number of absence instances increases.
Use scores with context
The Bradford Factor can be a helpful measure, but it should never be used in isolation.
It does not account for the reason behind an absence, so employers should always review scores fairly and consider circumstances such as disability, chronic illness, or other legitimate health issues.
How can a Bradford Factor calculator help your HR team?
An absence total tells you how much working time has been lost. A Bradford Factor score adds another perspective by showing how frequently those absences occur.
Used alongside accurate absence records and conversations with employees, it can help your team:• Spot recurring short-term absence patterns.
• Prepare for attendance reviews with a consistent calculation.
• Identify opportunities to offer support.
• Understand where repeated absences may affect staffing and workloads.
The score provides a starting point for a conversation. It does not explain why someone has been absent.
Use Bradford Factor scores consistently and thoughtfully
A consistent calculation can support your absence management process, but it does not automatically make every comparison fair.
Employees may have very different reasons for being absent. Always consider the context behind a score and apply your absence policy carefully.
A high score should prompt a review, rather than an automatic conclusion about an employee’s commitment or conduct. The calculator cannot determine whether an absence is genuine or what action is appropriate.
Monitor absence more clearly
Use the Bradford Factor alongside your absence records to spot patterns, support employees, and make more informed HR decisions.
Calculate Bradford scoreBradford Factor FAQs
How do you calculate the Bradford Factor?
Square the number of separate absence spells, then multiply by the total days absent during the same period. The formula is E² × D. For example, 3 absence spells totalling 6 days give a Bradford Factor score of 54.
What counts as one absence spell?
One continuous period of sickness absence normally counts as one spell, whether it lasts one working day or several. If an employee returns to work and is later off sick again, that normally starts a new spell. Follow your organisation’s absence policy when recording absences.
What is a good Bradford Factor score?
There is no universal “good” score or standard threshold. Employers set their own review points in their absence policy. A lower score reflects fewer absence spells, fewer days absent, or both. Any score should be considered alongside the reasons for absence.
Why do several short absences produce a higher score?
The formula squares the number of absence spells, giving repeated absences more weight. For example, one spell lasting 5 days scores 5, while five separate one-day absences score 125. The score highlights frequency; it does not explain why someone was absent.
When does a Bradford Factor score reset?
It depends on the period your employer uses. With a rolling 52-week period, older absences fall out of the calculation as time passes, rather than the whole score resetting on a fixed date. Check your absence policy for the period that applies.
Does a high Bradford Factor score mean a disciplinary warning?
No. Reaching a review point should prompt a conversation about the employee’s absence, wellbeing and support needs. It should not automatically trigger disciplinary action. Employers should consider individual circumstances before deciding what happens next.
How should disability-related absence be treated?
Employers should consider reasonable adjustments for disability-related absence. These may include adjusting review thresholds or excluding some or all disability-related absence from trigger calculations. The appropriate approach depends on the employee’s circumstances.
What are the limitations of the Bradford Factor?
The score measures absence frequency and duration, but does not account for the underlying causes or an employee’s health needs. Use it alongside accurate absence records, conversations with employees and a fair absence management policy.
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