Presenteeism vs Absenteeism: The Hidden Cost of People Who Come to Work Unwell

What is the difference between presenteeism and absenteeism?

Absenteeism is when employees are away from work, usually because of illness. Presenteeism is when they are at work but not functioning fully because they are unwell, physically or mentally. In his widely cited review in the Journal of Organizational Behavior, Gary Johns defines presenteeism simply as attending work while ill. Absenteeism shows up in your HR system. Presenteeism does not, and several large studies suggest it is the larger of the two costs.

For HR leaders and founders, that is the uncomfortable point. A team with excellent attendance can still be losing a large share of its capacity, quietly, to people who are present in body and depleted in every other way. I am a clinical psychologist, and the pattern I see most often is not people who disappear; it is people who keep showing up long after they have stopped coping.

How common is absenteeism?

Presenteeism often looks like ordinary tiredness at first. Dread before the working week is an early signal, and telling burnout from depression matters because the support each needs is different.

Absence is easy to count, which is why most companies track it. In the US, the Bureau of Labor Statistics measures it through the Current Population Survey. In 2025, 3.2% of full-time wage and salary workers were absent from work in a given reference week, 2.2% because of their own illness or injury. (BLS notes that the 2025 annual figures are 11-month averages, because October data were not collected during the federal government shutdown.)

Those numbers are useful as a baseline. They say nothing about the people who were at their desks that week while struggling to concentrate, sleep or keep their temper.

Why is presenteeism often more expensive than absence?

Because the losses are spread across many more people and many more days, and nobody records them.

Several studies have tried to put numbers on it:

• Goetzel and colleagues (2004) combined medical, absence and productivity data for ten common health conditions affecting US employers. Presenteeism costs were higher than medical costs in most cases and made up between 18% and 60% of all costs across the ten conditions.
• Stewart and colleagues (2003), in a JAMA study of US workers with depression, found that 81% of the cost of lost productive time was explained by reduced performance while at work, rather than by absence.
• Deloitte UK (2024) estimated that poor mental health costs UK employers around £51 billion a year. Presenteeism was the largest single contributor, at around £24 billion, compared with about £7 billion for sickness absence and £20 billion for staff turnover.

These are estimates built on self-reported productivity, and each uses its own method. But they point in the same direction: if you only manage absence, you are managing the smaller part of the problem.

Why do people come to work when they are unwell?

Johns' review notes that presenteeism has organisational and occupational correlates, not just medical ones. In other words, whether someone works through illness depends heavily on the workplace around them.

Some of the most direct evidence comes from a national survey of more than 26,000 US public health workers in 2021, analysed by CDC researchers (Moore and colleagues, 2023). Among written explanations for not taking time off, the most common were financial concerns (24.4%), fear of judgment or retaliation (20.8%), and limits on the amount of time off available (11.0%).

From my clinical work, I would add a few patterns that managers can usually recognise:

• No one to cover. People stay because they know their work will pile up or land on a colleague.
• Mental health does not "count". Many employees will take a day off for a fever but not for anxiety, panic or exhaustion.
• Leaders model it. When managers answer messages while ill, teams read that as the real policy.
• Identity and fear. High performers often feel that slowing down will be read as weakness.

What does presenteeism look like on a team?

Presenteeism is not laziness. It usually looks like effort without output. Watch for:

• More small errors from someone who is normally precise.
• Long hours with less getting finished.
• Withdrawal from meetings, cameras off, shorter replies.
• Irritability or flatness in someone who used to be engaged.
• "I'm fine, just tired" for weeks rather than days.

None of these are diagnoses, and managers should not try to diagnose. They are signals that a conversation is overdue.

What can managers and HR do about presenteeism?

The goal is not to send everyone home at the first sniffle. It is to make it normal and safe to work at reduced capacity openly, or to step away, before a slow decline becomes a long absence.

• Make the policy explicit for mental health. Say in writing that sick leave can be used for mental health reasons and that no explanation is required.
• Plan for cover. If one absence breaks a process, people will not be absent. Cross-training is a mental health intervention.
• Train managers to ask. The WHO's 2022 guidelines on mental health at work recommend mental health training for managers, so they can recognise and respond to distress and address work-related stressors. That is not about turning managers into therapists.
• Leaders go first. When a senior person says "I'm offline today, I'm not well", it gives everyone else permission.
• Measure what you can. Pulse surveys with questions about energy, workload and whether people feel able to take time off will tell you more than absence data alone.
• Look upstream. If presenteeism is widespread, the cause is usually workload, staffing or culture, not individual weakness.

Where does Dzeny fit?

Dzeny is an AI-based mental wellbeing app. It does not diagnose and it does not replace professional care or organisational change. What it can do is help an individual notice what is happening earlier: track mood and stress, put a difficult week into words, and practise evidence-informed techniques for managing worry and overload. For someone who would never raise "I'm not coping" with a manager, that kind of private reflection can be the first step towards asking for help or time off.

The bottom line

Absenteeism is the cost you can see; presenteeism is the cost you are already paying without a line item. Several studies suggest that working while unwell, especially with mental health problems, accounts for a large share of lost productivity. The fix is less about policing attendance and more about making it safe to be honest about capacity, having cover in place, and dealing with the workload and culture that keep people at their desks when they should be recovering.

⚠️ Important

This article is for informational purposes only and is not a substitute for professional medical or psychological advice. If you or someone you know is in crisis in the US, call or text 988 (Suicide and Crisis Lifeline, 24/7). Elsewhere, contact your local emergency number.