Bradford Factor Calculator

Bradford Factor: The Complete Guide for UK Employers

The Bradford Factor is one of the most widely used absence management tools in UK HR. It assigns a numerical score to each employee's absence pattern, helping managers identify those whose short-term absence is causing disproportionate operational disruption.

The Bradford Factor Formula Explained

Bradford Factor = S² × D

Where:

• S = the number of separate absence spells in the rolling 52-week period
• D = the total number of days absent in the same period

The key insight is that S is squared. This means frequent short absences generate exponentially higher scores than a single long absence with the same total days.

Bradford Factor Examples

Standard Trigger Thresholds

Different organisations use different thresholds. The most common structure is:

• 0–99: No formal action needed — monitor
• 100–199: Verbal warning or informal welfare review
• 200–299: Written warning
• 300–399: Final written warning
• 400+: Consideration of dismissal

Legal Considerations

The Bradford Factor is a management aid, not a legal process. Employers must:

• Apply thresholds consistently to all employees
• Exclude absences related to disability (Equality Act 2010), pregnancy, or maternity — including these risks indirect discrimination claims
• Conduct a return-to-work interview after every absence before calculating scores
• Follow a fair disciplinary procedure before any formal action
• Consider each case on its individual facts — not just the score

Managing Absence Effectively

The Bradford Factor works best as part of a broader absence management policy. Use it alongside SSP calculations to understand the cost of absence, and factor sick pay liabilities into your overall employee cost planning.