Bradford Factor Calculator

The Bradford Factor formula is B = S^2 x D. S is the number of separate absence instances (also called spells) over a rolling period, usually 52 weeks. D is the total number of working days absent across all those instances. Squaring S means the score punishes frequent short absences much more heavily than a single long absence.

Most CIPD-style scoring bands treat 0 to 50 as low concern (no action), 51 to 124 as monitoring (informal chat), 125 to 399 as formal review territory, 400 to 899 as written warning territory, and 900 or above as serious enough to trigger dismissal consideration. These are HR convention, not statutory thresholds: every employer can set its own bands in the attendance policy.

No. The math B = S^2 x D is identical worldwide. What changes is the HR reference body (CIPD in the UK, AHRI in Australia, SHRM in the US, WRC in Ireland) and the local equality and disability law that protects certain absence types. Use the country selector to surface the correct framing for your jurisdiction. The score you get on this page works for the UK, Ireland, Australia, New Zealand, South Africa, Canada, the US, and any other country that uses Bradford-style absence scoring.

Squaring the number of absence instances means the formula treats two short absences as four times worse than one (2^2 = 4 against 1^2 = 1), and ten short absences as one hundred times worse than one (10^2 = 100 against 1^2 = 1). This deliberately flags employees with unpredictable, disruptive attendance patterns rather than employees with one extended period of genuine illness.

The default is a rolling 52 weeks, which is the standard CIPD and ACAS recommendation. Some employers use a calendar year, a rolling 26 weeks, or even a rolling 12 weeks for tighter monitoring. The shorter the period, the more sensitive the score to recent absences. The calculator computes B from whatever S and D values you supply, so choose the period that matches your attendance policy.

A high Bradford Factor score on its own is not legal grounds for dismissal in any jurisdiction. It is a triage signal that triggers a formal absence procedure. Before any disciplinary action, employers must investigate underlying causes and apply local protections: Equality Act 2010 in the UK, ADA and FMLA in the US, Fair Work Act in Australia, Employment Relations Act in New Zealand, and equivalent statutes elsewhere. Disability-related, pregnancy-related, and statutory leave should normally be excluded from the calculation.

Critics argue that the score over-penalises legitimate short illness (cold, flu, migraine, mental health flare-ups) and disproportionately flags employees with chronic conditions. Defenders argue it is a starting point for a conversation, not a verdict. CIPD recommends pairing Bradford Factor monitoring with return-to-work interviews, occupational health referrals, and reasonable adjustments before any formal action.

Rarely. US absence management is dominated by the Family and Medical Leave Act (FMLA), the Americans with Disabilities Act (ADA), and PTO policies that bundle sick and vacation time. Some US employers with UK or Commonwealth parent companies use Bradford Factor internally, but it is not a mainstream US HR metric. SHRM mentions it only in passing.

Most employers exclude statutory leave (parental leave, jury duty, bereavement), disability-related absence covered by accommodation requirements, and any absence the law protects in your jurisdiction. Without these exclusions, the Bradford Factor becomes legally risky and can expose the employer to discrimination claims under the Equality Act (UK), ADA (US), Disability Discrimination Act (Australia), Employment Equality Acts (Ireland), and equivalent laws elsewhere.

Yes, but use working days the employee was scheduled to attend, not calendar days. A part-time employee scheduled three days a week who misses one full week records 3 days absent, not 7. Bradford does not normalise for FTE on its own, so compare scores within the same working-pattern cohort rather than across them.

Yes, the Bradford Factor Calculator is fully embeddable. Tap "Embed" above to configure appearance and copy the code. It is free to use, works on any platform (HTML, WordPress, CMS), and adjusts to any screen size automatically. Visit calculory.com/services/embed-calculators for the complete guide.