OHS vs WHS: What Is the Difference and Why It Matters in Australia

The terms OHS (Occupational Health and Safety) and WHS (Work Health and Safety) are generally used interchangeably in the workplace. However, there are fundamental distinctions between the two – particularly within the Australian context.

Both frameworks relate to the protection of workers and maintenance of safe workplaces, but importantly each derives from different regulatory eras. In a way, they’re a reflection of an evolution in how workplace safety is understood and managed. This blog outlines the difference between OHS and WHS, and why it matters for businesses operating in Australia today.

What is occupational health and safety (OHS)?

Occupational Health and Safety (OHS) – sometimes referred to as OH&S – is the traditional term used for workplace health and safety systems, laws, and practices.

When considering what OHS/WHS is, the best way to think about OHS is as the earlier framework. It focused primarily on preventing workplace accidents and physical injuries.

It focuses on maintaining workplaces that are safe through structured rules, compliance requirements and established safety practices. OHS typically includes formal occupational health and safety OHS procedures.

Common OHS concerns include:

• Machine guarding and equipment safety
• Manual handling and lifting procedures
• Noise exposure and hearing protection
• Chemical handling and hazardous substances
• Slips, trips, and falls in the workplace

These policies and procedures control physical hazards and minimise workplace injury rates.

What is work health and safety (WHS)?

Work Health and Safety (WHS) is a contemporary term used in Australia, following the introduction of harmonised WHS legislation across most states and territories. 

You will often see this written as OHS/WHS, reflecting the overlap between the older and newer terminology. There are subtle differences however. WHS expands on traditional OHS principles by taking a broader and more holistic view of worker health and safety.

The focus isn’t on physical hazards, but both physical safety and psychological wellbeing as well. This means WHS addresses not only how workers can be protected from injury, but also how work affects mental health and wellbeing.

Examples of WHS concerns include:

• Workplace bullying and harassment
• Work-related stress and burnout
• Fatigue management and excessive workloads
• Psychological hazards and organisational culture issues
• Traditional physical risks such as machinery, chemicals, and manual handling

WHS reflects a modern understanding that health and safety is not only physical, but also psychological and organisational.

The fundamental difference: Scope

The main differentiator between OHS and WHS is scope. OHS is primarily focused on physical safety and the prevention of workplace injuries. WHS, however, has a broader scope that includes both physical safety and psychological health.

A simple way to understand it is:

• OHS/WHS (traditional view): Focuses mainly on preventing physical harm
• WHS (modern framework): Focuses on both physical and mental wellbeing

In other words, WHS expands the lens from simply preventing accidents to creating healthier, safer, and more sustainable workplaces overall.

The harmonisation of WHS laws in Australia

The shift from OHS to WHS was driven by the need to create a consistent national approach to workplace safety regulation. Previously, different states and territories had varying OHS/WHS laws and terminology, resulting in substantial confusion for organisations operating across multiple jurisdictions. Most Australian states and territories adopted harmonised WHS legislation to address this, creating a unified national framework. 

Today, WHS is the dominant legal framework but it’s common for many businesses and workers to still use the term OHS. You will often see OHS and WHS used together, even though WHS is the current legislative standard in most jurisdictions.

Why the shift to WHS?

The move from OHS to WHS reflects a growing understanding of what workplace safety truly involves.

Key drivers of this shift include:

• Increased recognition of mental health in the workplace
• Awareness that psychosocial risks can impact safety and productivity
• Understanding that stress, fatigue, and poor workplace culture contribute to incidents
• A broader commitment to long-term worker wellbeing

Modern WHS frameworks acknowledge that a truly safe workplace must manage both physical and psychological risks. 

Digital systems such as the WHS Monitor app help organisations support this broader approach by centralising reporting, monitoring risks and improving visibility across both physical and psychosocial hazards. This makes it easier to maintain compliance and strengthen overall safety outcomes.

Understanding the practical implications

For businesses operating under WHS legislation, the expanded scope means safety management must go beyond traditional OHS/WHS procedures. Workplaces must now consider a wider range of risks, including psychosocial hazards such as stress, fatigue and issues in workplace culture.

This requires stronger systems of management, including:

• Comprehensive risk assessments covering both physical and psychological hazards
• Clear workplace policies and procedures that address psychosocial risks
• Improved reporting mechanisms for incidents and near misses
• Ongoing monitoring of workplace conditions and worker wellbeing

Ultimately, WHS requires a more proactive and integrated approach to managing workplace safety.

Final thoughts

OHS and WHS are often used interchangeably, but there is an important distinction between the two. You may still see OHS/WHS used across different workplaces and industries, but understanding the difference is important – particularly within the Australian legal context.

For organisations navigating this broader scope, working with the right system in place is critical. WHS Monitor brings both physical and psychosocial risk management into one platform, giving teams the visibility, structure and consistency needed to manage obligations. Partner with WHS Monitor, and build safer, more resilient workplaces today.