Bradford Factor

An introduction to the Bradford Formula

The Bradford Formula evokes mixed emotions, dependant on who you talk to. The tool itself is a simple calculation (S2 x D = B) that increases the weighting of an absence period as more absences occur.

S2 - Total number of absences squared X D - Total number of days absent = B - Bradford Score.

E.g. A member of staff has three periods of sick absence in a designated time period of a year. The first absence is 4 days, the second absence 1 day and the third absence 2 days. See below how the Bradford Score rises from one to the next.

1 absence x 1 absence x 4 days = 4

2 absences x 2 absences x 5 days = 20

3 absences x 3 absences x 7 = 63

You can see that although only three days are accrued between the first period of absence and the last period of absence, the Bradford score has increased significantly (over 15 times the original score).

Designed at Bradford University, the developers worked on an assumption that the more absences a person had, the bigger impact it would have on the running of the normal, everyday business.(As opposed to one long period of absence). Therefore, the more absences there are, the heftier the weighting attached to it.

Please note there is no defined correlation between the Bradford Factor and BMI. You can read more on BMI Calculations here.

Here are a few things to consider: (Please note that the term manager is used to cover the broader roles of employer and Human Resource department, as appropriate).

Bradford Factor Resources

Additional Bradford Factor Resources

For further information on The Bradford Factor (Use, Implementation and Record Keeping), please review our Bradford Factor guides and management strategy information.