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Absenteeism Bradford factor

How can absenteeism bradford factor improve people, teams, or organisational effectiveness?

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Contents

Helps managers answer: To what extent is unauthorised employee absenteeism a problem in our business?

Employee absence creates direct payroll costs and operational disruption. The wider cost can be greater: critical roles may need temporary cover, replacements may earn overtime, staffing levels become harder to maintain, and medical, group-life and disability premiums may rise. Indirect costs are estimated to reach 200% or more of direct absence costs. As a broad industry-dependent estimate, absenteeism can consume between 5% and 9% of annual profit.

When to use it

Answer the key performance question: “To what extent is unauthorised employee absenteeism a problem in our business?”
Assess this KPI within the Employee perspective.
Plan data collection, formula use, reporting frequency, and data-source requirements for this KPI.
Compare results against the targets, benchmarks, examples, or trend guidance available for this KPI.

Origins

The Bradford Factor has circulated in UK human-resources practice since at least the 1980s and is commonly linked with the University of Bradford School of Management, although no definitive original publication or named inventor has been established. Its formula deliberately weights repeated short absences more heavily than one absence covering the same total number of days. That weighting is a management-policy choice, not a clinical judgement, so a score should initiate a fair review rather than trigger automatic punishment.

What it is

Perspective: Employee perspective.

Key performance question: To what extent is unauthorised employee absenteeism a problem in our business?

Absence is an employee's unavailability for work. Legal absence includes public holidays; authorized absence includes approved leave; unauthorized absence has not received the required approval. All three types need costing and management, but unplanned or unauthorized absence usually creates the greatest operational difficulty.

People miss work for many reasons, including illness, family responsibilities, stress and a belief that they are entitled to occasional time off. Frequent short and unplanned episodes tend to be especially disruptive because managers must repeatedly rearrange cover and work. The Bradford Factor combines frequency and duration to highlight attendance patterns that merit closer review.

The measure can reveal trends and establish trigger points. It does not explain the cause of absence or determine whether an employee has acted improperly.

How to use it

Measurement

Choose a consistent observation period and include only the absence categories covered by the organization's policy. Calculate the score for each employee, monitor changes and use thresholds to begin a documented conversation about context and support.

Formula

Count total unplanned absence days and the number of separate episodes during the selected period:

Bradford factor = Dt × Et × Et

Dt = Total number of days of unplanned absence

Et = Total number of individual spells or episodes of absence

Because episodes are squared, frequency drives the result more strongly than duration.

Frequency

Annual calculation, using a calendar year or rolling 12 months, is common. Quarterly or monthly monitoring can identify emerging patterns sooner and show progress against absence-reduction objectives.

Source of the data

Use categorized attendance records from the HR system. Where unauthorized absence is not separately recorded, sickness absence may be used as a proxy only with clear disclosure and appropriate safeguards.

Cost/effort in collecting the data

Calculation is inexpensive when the HR system contains accurate episode dates and categories and can produce the score automatically. Manual consolidation and calculation raise cost and error risk.

Target setting/benchmarks

Set triggers using relevant industry comparison, organizational history and policy. Illustrative starting points are:

Annually: Bradford factor of 80 or higher

Quarterly: Bradford factor of 27 or higher

Monthly: Bradford factor of 12 or higher.

These are review triggers, not universal evidence of misconduct.

Example

The formula produces very different results for the same 10 days:

Ten separate one-day absences: 1,000 = 10 × 10 × 10.

One 10-day absence: 10 = 1 × 1 × 10.

Five two-day absences: 250 = 5 × 5 × 10.

Two five-day absences: 40 = 2 × 2 × 10.

In May 2001, Her Majesty's Prison Service in the UK began using the measure as an attendance score for short-term sickness. Its management scale stated:

51 points in 6 months led to a verbal warning;
201 points led to a written warning; and
401 points led to a final warning.

An employee already on a final warning who reached 601 points in 12 months could be dismissed for unsatisfactory attendance. The approach was associated with an average reduction of 0.4 absence days per person. Any organization considering a similar policy must align it with current law, disability and equality duties, medical evidence and procedural fairness.

Top practical tip

Monitor unintended behaviour as well as the score. When employees know a hard threshold, some may manage absence up to the limit or attend work when genuinely unwell. Use the metric with conversation, support and broader attendance evidence.

Top pitfall

Never treat the Bradford Factor as a diagnosis or sole disciplinary criterion. Legitimate illness, disability, pregnancy, caring responsibilities and other circumstances require individual, lawful consideration. The score identifies a pattern to investigate; it does not explain it.