Yes. Work health and safety duties in Australia apply to every business regardless of how many people it employs. There is no exemption for small businesses, sole traders or family operations. If you direct or influence how work gets done, you hold a duty of care.

What changes with the size of your business isn’t whether the duty exists. It’s the scale of what is reasonable for you to have in place.

Where Does the “Under 20 Employees” Idea Come From?

A handful of employment obligations in Australia do change at 15 or 20 employees. Redundancy pay under the Fair Work Act is the one most people are thinking of. WHS isn’t one of them.

Under the model Work Health and Safety laws, the duty sits with the “person conducting a business or undertaking”, or PCBU. That is a deliberately broad definition. It captures a company with 400 staff, a builder with three apprentices, and a sole trader with none. The obligation is to ensure, so far as is reasonably practicable, the health and safety of workers and anyone else affected by the work.

Every state and territory except Victoria now operates under a version of the model WHS laws. Victoria’s Occupational Health and Safety Act 2004 uses different wording but lands in the same place: the duty applies to employers regardless of size.

What Does “Reasonably Practicable” Mean for a Small Business?

This is the part that scales with your business, and it’s where most small operators get the wrong idea.

“Reasonably practicable” weighs the likelihood of a hazard causing harm, how serious that harm would be, what you know or ought to know about it, what is available to control it, and the cost of doing so. A two-person cabinet maker isn’t expected to run the safety function of a tier-one contractor.

But the test is about proportionality, not exemption. A small business still has to identify its hazards, control them, tell its workers about them, and be able to show it did. A regulator or a court looks at what a reasonable business in your position would have done, not at your headcount.

What Does a Small Business WHS Management System Need?

For most businesses under 20 people, a workable WHS management system is narrower than people fear and more documented than they expect:

• A WHS policy that states how the business manages health and safety and who is responsible.
• Risk assessments for the hazards specific to your work, reviewed when the work changes.
• Safe Work Method Statements (SWMS) for any high-risk construction work you perform. These are legally required and must be specific to the job, not generic.
• Safe operating procedures for plant, equipment and tasks that carry risk.
• Induction and training records showing workers were told how to work safely, with evidence they received it.
• Incident and near-miss records, including what you did in response.
• Consultation records such as toolbox talks and safety meetings, showing how you involve workers in decisions that affect their safety.
• Current documents. WHS legislation, codes of practice and standards change. A system built three years ago and never reviewed is a liability rather than a defence.

For a closer look at the individual documents, see our guide to 10 WHS policies and procedures to keep your workplace safe.

Why Do Most Small Businesses Actually Get One?

It’s usually not the regulator. It’s the work.

Principal contractors, government clients, insurers and larger customers increasingly require documented WHS systems before they’ll let you on site or onto a panel. Pre-qualification portals ask for your policy, your SWMS, your training records and your incident register. No documentation, no site access, and it doesn’t matter how good your safety record is if you can’t evidence it.

Businesses that treat WHS documentation as a commercial asset rather than a compliance chore tend to win work that their competitors get screened out of.

What Happens If a Small Business Doesn’t Have One?

There are two separate consequences, and they’re worth keeping apart.

Commercially, you get locked out of work. You fail pre-qualification, you can’t answer a client audit, and you lose contracts to businesses whose paperwork is in order.

Legally, the exposure appears when something goes wrong, or when an inspector visits and asks to see your system. Regulators can issue improvement notices requiring you to fix something within a set timeframe, or prohibition notices stopping the work entirely. Serious breaches can be prosecuted, and prosecutions don’t require anyone to have been injured. The absence of a system is itself the failure. We cover this in more detail in what happens if you fail a WHS audit.

Do You Have to Build a WHS System Yourself?

No, and most small businesses shouldn’t. Writing WHS documentation from scratch means interpreting legislation, tracking amendments across jurisdictions, and keeping every document current as codes of practice are updated. It’s a specialist job and rarely a good use of an owner’s time.

The practical options are hiring a consultant to build a bespoke system, buying templates and adapting them, or subscribing to a managed system that is kept up to date for you as the law changes.

Whichever route you take, the test is the same: can you produce current, job-specific, signed documentation when a client or an inspector asks for it?

How ASSA Can Help

ASSA gives small businesses a complete WHS management system without having to build one. Members get unlimited access to more than 400 SWMS, safe operating procedures for tools and equipment, the WHS policies a small business is required to have, and forms and registers for incidents, inductions and toolbox talks, all branded with your logo.

When legislation or a code of practice changes, we update the documents and notify you, so your system stays current without you having to track it. For work that needs something specific, our team also writes custom SWMS and documents tailored to your site and tasks.

Frequently Asked Questions

Does WHS law apply to sole traders? Yes. A sole trader is a PCBU and holds duties to themselves and to anyone affected by their work.

Do I need a SWMS if I only do small jobs? A SWMS is required for any of the 18 categories of high-risk construction work regardless of job size, including work at height above two metres, work near energised electrical installations, and work in or near a confined space. Our guide to SWMS for high-risk work covers the full list.

How often should WHS documents be reviewed? Whenever the work changes, after an incident, when a new hazard is identified, and whenever relevant legislation or a code of practice is updated. An annual review is the usual baseline.

Is a WHS system different from having insurance? Yes. Insurance responds after something happens. A WHS system is the evidence that you took reasonable steps to prevent it, and insurers increasingly ask to see one.

Final Thoughts

Australian WHS law has no small business exemption. Every business with workers, and every sole trader, needs a system proportionate to its risks, documented well enough to prove it exists and current enough to reflect the law as it stands. For most small businesses the question isn’t whether to have one, but how to get one in place without it taking over the business.

This article is general information, not legal advice. WHS obligations vary between states and territories. For advice specific to your business, speak with a qualified WHS professional or your state regulator.

Join ASSA or call our team on 1300 131 014 to see how it works for your business.