PCBU Duties Under HSWA 2015: What You Need to Know

The Health and Safety at Work Act 2015 (HSWA) replaced New Zealand's outdated Health and Safety in Employment Act 1992, fundamentally changing who is responsible for workplace safety and what they must do. At the centre of this shift is the concept of the PCBU -- the Person Conducting a Business or Undertaking.

If you run a business in New Zealand, you are almost certainly a PCBU. Understanding what that means is not optional -- it is a legal obligation that carries serious consequences if you get it wrong.

What Is a PCBU?

A PCBU is any person who conducts a business or undertaking, whether alone or with others, and whether or not for profit. The definition is intentionally broad. It covers:

• Companies and partnerships
• Sole traders and self-employed contractors
• Government departments and Crown entities
• Not-for-profit organisations
• Incorporated societies and trusts (when employing or engaging workers)

The term replaced "employer" to capture the modern reality that many workers are not traditional employees. A principal contractor on a construction site is a PCBU. The subcontractor is also a PCBU. A labour hire company is a PCBU. The host employer engaging the labour hire workers is also a PCBU. Multiple PCBUs can have overlapping duties on the same site.

The Primary Duty of Care

Section 36 of HSWA establishes the primary duty of care. Every PCBU must ensure, so far as is reasonably practicable, the health and safety of workers who carry out work for the PCBU, and that other persons are not put at risk by the work.

This duty is broad and non-delegable. You cannot contract it away, outsource it to a safety consultant, or transfer it to another party. Even if you hire an external H&S advisor, the legal duty remains with you as the PCBU.

Specifically, section 36 requires PCBUs to provide and maintain:

• A work environment that is without risks to health and safety
• Safe plant and structures
• Safe systems of work
• The safe use, handling and storage of plant, substances, and structures
• Adequate facilities for the welfare of workers
• Information, training, instruction, and supervision necessary to protect all persons from risks
• Monitoring of worker health and workplace conditions

Preparing a Safe Work Method Statement (SWMS) for high-risk work is one of the most direct ways to demonstrate you have provided safe systems of work. For a step-by-step guide to writing one, see our complete SWMS writing guide.

What "Reasonably Practicable" Actually Means

HSWA does not require you to eliminate every conceivable risk. The standard is "reasonably practicable" -- defined in section 22 of the Act. It means that which is, or was, at a particular time, reasonably able to be done in relation to ensuring health and safety, taking into account and weighing up all relevant matters.

Those matters include:

1. The likelihood of the hazard or risk occurring -- a risk that is highly likely demands more action than one that is remote
2. The degree of harm that could result -- potential fatality justifies greater expenditure than minor bruising
3. What the person knows, or ought reasonably to know, about the hazard or risk and ways of eliminating or minimising it -- ignorance is not a defence if the knowledge was available
4. The availability and suitability of ways to eliminate or minimise the risk -- proven control measures that are readily available should be adopted
5. The cost of available measures -- but only after weighing the above factors; cost alone cannot justify inaction against a serious risk

Officer Due Diligence Duties

Section 44 of HSWA places a separate, personal duty on "officers" of a PCBU. An officer includes company directors, partners in a partnership, and anyone who exercises significant influence over the management of a business. This is a personal duty -- it cannot be delegated.

Officers must exercise due diligence to ensure the PCBU complies with its duties. Due diligence requires the officer to:

• Acquire and keep up-to-date knowledge of work health and safety matters
• Understand the nature of the business operations and the hazards and risks associated with them
• Ensure the PCBU has appropriate resources and processes to eliminate or minimise risks
• Ensure the PCBU has appropriate processes for receiving and considering information about incidents, hazards, and risks, and for responding in a timely way
• Ensure the PCBU has, and implements, processes for complying with any duty or obligation
• Verify the provision and use of resources and processes

In practice, this means directors cannot sit in a boardroom and claim ignorance. They must actively engage with health and safety, review reports, ask questions, and verify that systems are working.

Worker and Other Person Duties

Workers have duties under section 45 of HSWA. They must take reasonable care for their own health and safety, take reasonable care that their acts or omissions do not adversely affect the health and safety of other persons, and comply with any reasonable instruction given by the PCBU.

Other persons at a workplace (visitors, customers, delivery drivers) also have a duty under section 46 to take reasonable care for their own health and safety and not to adversely affect others.

However, the PCBU's duty is always the primary one. A worker's failure to follow a procedure does not absolve the PCBU of its obligation to provide a safe system of work in the first place.

Overlapping Duties and Multi-PCBU Sites

Construction sites commonly have multiple PCBUs -- a principal contractor, several subcontractors, labour hire companies, and specialist consultants. Section 34 of HSWA addresses this directly: when more than one PCBU has a duty in relation to the same matter, each person must discharge their duty to the extent to which they have the ability to influence and control the matter.

PCBUs with overlapping duties must, so far as is reasonably practicable, consult, cooperate with, and coordinate activities with each other. This is why site-specific inductions, pre-start meetings, and shared SWMS are so critical on multi-employer sites.

Penalties for Non-Compliance

HSWA introduced three tiers of offence, with significantly higher penalties than the previous legislation:

These are not theoretical numbers. WorkSafe NZ actively prosecutes, and fines in the hundreds of thousands of dollars are regularly imposed. For more on how WorkSafe enforces these duties, see our guide to WorkSafe NZ compliance requirements.

Practical Steps to Meet Your Duties

Meeting your PCBU duties does not require perfection. It requires a systematic, demonstrable effort to identify and manage risks. Here is what that looks like in practice:

1. Establish a health and safety management system -- even a simple one with hazard registers, incident reporting, and regular reviews
2. Identify hazards systematically -- do not wait for incidents; conduct regular workplace inspections and risk assessments
3. Apply the hierarchy of controls -- always consider elimination and substitution before falling back to PPE
4. Prepare SWMS for high-risk work -- document your safe work procedures, ensure workers are briefed, and keep them current
5. Consult with workers -- HSWA requires genuine engagement, not just notifying workers of decisions already made
6. Train and supervise -- ensure workers have the knowledge and skills to do their work safely
7. Monitor and review -- check that your systems are actually working, not just sitting in a folder
8. Report notifiable events -- deaths, notifiable injuries, and notifiable incidents must be reported to WorkSafe immediately

Creating compliant SWMS documents is one of the most tangible ways to demonstrate you are meeting your duty of care. A well-prepared SWMS shows WorkSafe that you have identified hazards, assessed risks, and implemented controls -- exactly what section 36 requires.