Due Diligence in Health and Safety: What Every Business Owner Needs to Know
If you're a business owner, director, trustee, or senior manager, you've probably heard the term "due diligence" when it comes to health and safety.
But what does it actually mean?
Many people assume that hiring a health and safety consultant, appointing a manager, or having a folder full of policies is enough. Unfortunately, that's not how the law sees it.
Under New Zealand's Health and Safety at Work Act 2015, due diligence is an ongoing responsibility. It's about actively ensuring your business is managing risks effectively—not simply trusting that someone else is taking care of it.
What Is Due Diligence?
Due diligence is the legal duty placed on officers of a business to take reasonable steps to ensure the organisation is meeting its health and safety obligations.
An officer could include:
Company directors
Business owners
Partners
Trustees
Chief executives
Senior leaders who make significant decisions about the business
Importantly, you cannot delegate your due diligence responsibilities. While others can help manage health and safety, accountability remains with those leading the organisation.
What Does Due Diligence Look Like in Practice?
Due diligence isn't about knowing every detail of every job. It's about asking the right questions and making sure effective systems are in place.
Examples include:
1. Understanding Your Risks
Do you know the critical risks within your business?
For example:
Working at heights
Excavations
Hazardous substances
Manual handling
Vehicle movements
Children's safety in ECE environments
Psychosocial risks such as fatigue and stress
If you can't confidently identify your highest risks, it's difficult to know whether they're being managed properly.
2. Ensuring Adequate Resources
Health and safety requires investment.
This may include:
Staff training
Personal protective equipment (PPE)
Maintenance programmes
Safe equipment
Competent supervision
Time to complete work safely
Expecting workers to "just get on with it" without adequate resources creates unnecessary risk.
3. Checking That Systems Actually Work
Many businesses have excellent policies that sit untouched in a filing cabinet.
Due diligence means verifying that your procedures are actually being followed.
Ask yourself:
Are inspections happening?
Are incidents investigated?
Are corrective actions completed?
Are workers consulted?
Are hazards being reported?
Are lessons being shared?
Health and safety should be visible in everyday operations—not just during an audit.
4. Staying Informed
Health and safety legislation, guidance, and industry expectations continue to evolve.
Business leaders should stay informed by:
Reviewing industry updates
Monitoring changes to legislation
Understanding emerging risks
Learning from incidents within their industry
You don't need to become a health and safety expert, but you do need enough knowledge to ask informed questions.
5. Reviewing Performance Regularly
Good leaders don't only review financial reports.
Health and safety performance should also be discussed regularly.
Useful questions include:
What incidents occurred this month?
What trends are emerging?
Have corrective actions been completed?
What are workers telling us?
Are our critical risks well controlled?
If health and safety only comes up after an accident, opportunities to prevent harm may already have been missed.
Common Misconceptions About Due Diligence
"I've hired a health and safety consultant."
Great—but that doesn't remove your legal responsibilities.
Consultants provide advice and support. Business leaders are still responsible for ensuring that advice is implemented.
"No one's been hurt."
Good luck is not evidence of good health and safety management.
Near misses, unsafe behaviours, and deteriorating controls often exist long before someone is injured.
"We passed an audit."
Audits provide a snapshot in time.
True due diligence is demonstrated through consistent leadership, ongoing monitoring, and continual improvement—not a certificate on the wall.
What is looked for
Following a serious incident, investigators may ask questions such as:
How did leadership identify this risk?
What information was reported to directors?
What decisions were made?
Were adequate resources provided?
How was the effectiveness of controls monitored?
What evidence demonstrates active oversight?
Being able to answer these questions confidently is often the difference between simply having a health and safety system and demonstrating genuine due diligence.
Due Diligence Is About Leadership
Strong health and safety cultures don't happen because of paperwork.
They happen because leaders:
Ask questions.
Listen to workers.
Follow up on actions.
Allocate resources.
Lead by example.
Continuously seek improvement.
Workers notice when leaders genuinely care about safety—and they notice when they don't.
Final Thoughts
Due diligence isn't about ticking boxes or creating more paperwork.
It's about ensuring every worker goes home safely while protecting your business from preventable incidents, legal action, and reputational damage.
When leaders remain engaged, ask meaningful questions, and verify that health and safety systems are working, they're not just meeting their legal obligations—they're building safer, stronger, and more resilient organisations.
At On To It Health & Safety, we help businesses move beyond compliance by developing practical health and safety systems that actually work. Whether you're in construction, trades, or early childhood education, we can help you understand your due diligence responsibilities and build confidence that your systems are protecting both your people and your business.