Mental Health at Work: What the NZ Data Actually Shows

The 2023 Workplace Wellness Report found that absenteeism costs the New Zealand economy $2.05 billion annually. Mental health issues account for approximately 20% of all workplace absences, meaning mental health-related absenteeism represents roughly $410 million of that total. The average employee takes 6.9 days off per year due to illness or injury.

Presenteeism costs more. The same report estimates presenteeism at $4.39 billion annually, equivalent to 7.7 million working days. This means the combined cost of employees being absent and employees being physically present but working at reduced capacity due to health issues is well over $6 billion per year. Presenteeism alone costs more than double what absenteeism costs.

Nearly 90% of employees (89.6%) reported working while unwell at some point in the past 12 months. This is not a small minority of dedicated overachievers, it is the overwhelming majority of the workforce. The reasons range from financial pressure to fear of workplace judgment to not recognising that their own performance is affected.

The Mental Health Foundation of New Zealand estimates that 1 in 5 New Zealanders will experience a mental illness in any given year. Why mental wellbeing at work matters explores the employer response in depth. Applied to a workforce of any size, this means mental health is not an edge case or a niche concern: it is a mainstream business issue affecting a significant proportion of most organisations at any given time. These figures are available at mentalhealth.org.nz.

Absenteeism is visible. An empty chair is noticeable. Managers can see it, payroll records it, and most workplaces have some process for managing it. Presenteeism is far harder to spot. An employee at their desk, attending meetings, and responding to emails looks like they are working. What the data does not capture is that they may be operating at 40 or 50 percent of their usual capacity because they are anxious, depressed, or physically unwell.

The productivity cost of presenteeism is harder to quantify on an individual level, which is precisely why it tends to be underestimated. Decisions that take longer than usual, errors that require correction, communication that misses the mark, work that has to be redone: none of these show up as a line item in the HR system, but they accumulate into a significant performance drag across any team.

There is also a compounding effect. Employees who work through illness, particularly mental health conditions, typically take longer to recover than those who rest appropriately when needed. The short-term gain of having someone at their desk is often more than offset by a longer recovery period, higher risk of a more serious episode, and in some cases burnout that leads to extended leave.

The 2023 Wellness Report found that 49% of businesses reported an increase in mental health issues among their employees over the past year. This is not a static problem: it is growing. Employers who treat mental health support as a nice-to-have are behind the curve on what is becoming a standard expectation for New Zealand workplaces.

One of the practical arguments for employer-funded group health insurance is that it removes cost as a barrier to seeking early treatment. An employee who develops symptoms of anxiety or depression and knows that a GP visit costs $60-70, followed by a specialist referral on a public waiting list that could be months long, is more likely to delay seeking help than someone who can access subsidised GP visits and faster specialist referrals through a health insurance plan.

Early treatment for mental health conditions is significantly more effective than delayed treatment, and the intervention costs are considerably lower. A few counselling sessions for someone in the early stages of burnout is a categorically different proposition to supporting someone through a full mental health breakdown and months of recovery. Group health plans that include psychological treatment cover and EAP access are making a practical difference to these outcomes.

Employee Assistance Programmes (EAPs) provide confidential counselling, typically for a limited number of sessions per year for both the employee and immediate family members. They are confidential: the employer does not receive information about who uses the service or why. For employees who might be reluctant to tell their manager they are struggling, an EAP provides a private route to support.

Access to services matters, but access alone is not enough if employees do not know the services exist or do not feel safe using them. A group health plan or EAP that employees have never heard of provides little protection.

Manager training is one of the most cost-effective investments in workplace mental health. Managers who can recognise early warning signs, who know how to have a supportive conversation without crossing into clinical territory, and who respond constructively when an employee signals they are struggling, change the trajectory of a lot of situations that would otherwise deteriorate.

WorkSafe NZ is clear that employers have a duty of care that extends to psychological health and safety, not just physical safety. This is not optional or aspirational: it is a legal obligation under the Health and Safety at Work Act 2015. The guidance at worksafe.govt.nz covers what this obligation means in practice.

The combination of accessible services, informed managers, and a culture that treats mental health as a legitimate reason to seek help is what actually reduces the $4.39 billion presenteeism cost in practical terms. That combination does not happen by accident, and it does not start with a poster in the break room.