HR Advice Hub

The Bradford Factor Explained: What It Is And When To Use It

The Bradford Factor is a simple formula used to measure employee absence - B = S² × D.

• B = Bradford score

• S = number of absence occasions

• D = total number of days absent

It’s designed to highlight frequent, short-term absences rather than long periods of sickness. In simple terms, someone who is off sick often for short periods will have a much higher score than someone who is off once for a longer time.

Where Did The Bradford Factor Come From?

The Bradford Factor was developed in the UK at the University of Bradford.

It was created as a simple way to measure the impact of employee absence, with a particular focus on frequent, short-term sickness rather than long-term absence.

The idea behind it is that repeated short absences can be more disruptive to a business than a single longer period off, as they are harder to plan for and manage.

Over time, it has become a widely used tool in absence management, particularly in organisations looking for a structured and consistent approach.

Why Do Employers Use The Bradford Factor?

Many employers use the Bradford Factor to bring structure and consistency to absence management.

It can help:

• Identify patterns of short-term absence

• Give managers clear trigger points

• Encourage early conversations

• Apply a consistent approach across teams

Used well, it’s not about catching people out - it’s about spotting patterns early and offering support where needed.

Who Should Use The Bradford Factor?

The Bradford Factor can be particularly helpful for:

• Small businesses without formal HR processes

• Managers who need simple guidance

• Organisations experiencing frequent short-term absence

It can act as a starting point where there isn’t already a clear system in place.

When Should You Be Careful Using It?

The Bradford Factor is a useful tool, but it isn’t perfect.

Because it focuses on numbers rather than reasons, it can sometimes give an incomplete picture.

If it’s used too rigidly, it can lead to:

• Unfair outcomes

• Missed underlying issues

• Damage to employee trust

When Is The Bradford Factor Not Appropriate (And Why)?

There are situations where the Bradford Factor doesn’t give a fair or accurate reflection of absence. In these cases, relying on it too heavily can lead to poor decisions - and potential legal risk.

Long-Term Sickness Absence: The Bradford Factor is designed for frequent absence, not long-term sickness. Someone who is off for several weeks or months may have a relatively low score, even though the impact on the business is significant.

Disability-Related Absence: If absence is linked to a disability under the Equality Act 2010, applying the Bradford Factor in the same way as other absence can be risky. Employers have a duty to make reasonable adjustments, and treating disability-related absence the same as other absence could lead to discrimination issues.

Pregnancy-Related Absence: Absence related to pregnancy should not be treated the same as general sickness absence.

Mental Health-Related Absence: Mental health absence often shows as short, intermittent periods. Because the Bradford Factor heavily penalises frequent absence, this can lead to inflated scores that don’t reflect the full picture.

Where Context Matters More Than Frequency: The Bradford Factor focuses on how often someone is off - not why. If you rely on it alone, you may:

• Miss underlying issues

• Treat very different situations the same

• Overlook opportunities to support employees

If the Bradford Factor is used as an automatic trigger for disciplinary action, it can lead to unfair outcomes.

How To Use The Bradford Factor Fairly

If you do choose to use the Bradford Factor, it’s important to apply it in a balanced way.

• Set clear and reasonable trigger points

• Apply it consistently across your business

• Always consider the context before taking action

• Link it to your sickness absence policy

Most importantly, use it as a prompt for a conversation and not a final decision.

Other Ways To Manage Sickness Absence

It’s also worth remembering that the Bradford Factor isn’t the only way to manage sickness absence. Many businesses choose to use simple trigger points instead, such as a set number of absences within a defined period. What matters most is having a clear and consistent approach that works for your business. Whatever method you use, it should be set out in your sickness absence policy so managers understand how to apply it fairly and employees know what to expect.

Need HR Support?

The Bradford Factor can be a helpful tool, but it works best when it’s used alongside good judgement, not instead of it.

Handled well, it can highlight patterns and support early intervention. Used too rigidly, it can lead to unfair outcomes and missed opportunities to support your people.

If you’re unsure how to set fair triggers or want to sense-check your approach, BloomHR can help you put something in place that works for both your business and your employees. Contact us for more information.