Subcontractor Compliance in Construction: What Australian Builders Must Check Before Engaging a Subbie

Engaging subcontractors is how most small construction businesses get work done. Framing, concreting, electrical, plumbing, tiling, painting — the typical residential or commercial build runs on a network of subbies, each bringing their own skills, tools, and (in theory) their own compliance obligations.

But subcontractor compliance in construction in Australia is not simply a matter of handing over work and collecting the result. As the head contractor or principal builder, you carry a set of legal responsibilities that follow the work — see our construction compliance checklist for the full picture.

This guide walks through everything Australian builders need to verify before engaging a subcontractor, and the ongoing obligations that follow once they're on site.

Why the Head Contractor Shares Liability for Subcontractors

The starting point for understanding subcontractor compliance is the Work Health and Safety Act framework. Under the model WHS Act (adopted in most states and territories), every person conducting a business or undertaking (PCBU) has a duty to ensure, so far as is reasonably practicable, the health and safety of:

• Their own workers
• Other workers whose activities they manage or influence
• Other persons who may be at risk from their work

The definition of "worker" under the WHS Act is deliberately broad. It includes employees, contractors, subcontractors, and the employees of those subcontractors. This means that as the head contractor managing a construction site, your WHS duty of care extends to every subcontractor and their workers who set foot on your site.

Multiple PCBUs can share duties in relation to the same matter. The subcontractor is a PCBU with their own duties. But you, as the principal contractor with management and control of the site, also have duties — and those duties overlap with the subcontractor's. The fact that you've engaged a licensed subcontractor does not transfer your WHS obligations to them.

Practical consequence: You cannot simply assume that because a subcontractor has their own business and their own workers compensation insurance, your obligations end at the site gate. They don't.

What to Verify Before Engaging a Subcontractor

A structured pre-engagement checklist is the first step in managing subcontractor compliance. Here is what to verify before a subcontractor commences work.

1. ABN and Business Registration

Confirm the subcontractor is operating as a registered business with a current ABN. This is basic but important — it establishes the commercial and tax basis of the relationship. You can verify an ABN at the ABN Lookup website (abr.business.gov.au).

If the subcontractor does not hold an ABN, you are required to withhold tax from payments under the ATO's no-ABN withholding rules (currently at the top marginal rate). This is rarely the right outcome — it usually means the arrangement needs to be restructured or the subcontractor needs to register.

2. Workers Compensation Insurance — Certificate of Currency

Every subcontractor who has their own workers (employees or contractors working for them) must hold workers compensation insurance. Before they start work, request a current Certificate of Currency from their workers compensation insurer.

Check:

• The policy covers the relevant period (not expired)
• The name on the certificate matches the entity you are engaging
• The certificate covers the type of work being performed

For sole traders with no employees, workers compensation requirements differ by state — in some states, sole traders in construction are still required to hold workers compensation cover (or are deemed workers of the principal contractor). Check your state's specific rules.

Set a reminder to re-check certificates before renewal dates. An expired certificate of currency is a red flag — the subcontractor may have allowed cover to lapse.

3. Public Liability Insurance — Certificate of Currency

Public liability insurance covers third-party property damage and personal injury caused by the subcontractor's work. Request a Certificate of Currency and check:

• The policy is current
• The coverage limit is adequate for the type of work (most head contracts require a minimum of $10 million, but check yours)
• The certificate covers the relevant work activities

A subcontractor who damages neighbouring property, causes a water main strike, or injures a member of the public creates liability. Their public liability policy is your first line of protection against that exposure becoming your problem.

4. Relevant Trade Licences

Different trades require different licences, and licence requirements vary by state. Before a subcontractor commences work, verify they hold the required licence for their trade and jurisdiction.

Examples of trades requiring licences:

• Electrical (all states — electrical contractor licence and/or electrician licence)
• Plumbing and drainage (all states — plumbing and drainage contractor/tradesperson licence)
• Gas fitting (typically covered under plumbing or a separate gas licence)
• Building and construction work above certain contract values (builder's licence — requirements vary by state)
• Asbestos removal (Class A or Class B asbestos removal licence — regulated by state WHS regulators)
• Scaffolding (high risk work licence required for certain scaffolding types)

Most states allow you to verify licences through the relevant licensing authority's online register. Make it a standard step in your pre-engagement process to search the register, not just accept a photocopy of a certificate — licences can be suspended or cancelled after the certificate was printed.

5. White Card (Construction Induction Training)

Every person who performs construction work in Australia must hold a current Construction Induction Training card — the White Card (previously called the Blue Card in some states). White Cards do not expire once issued, but they must be held before the person commences work on a construction site.

Confirm that the subcontractor and all of their workers who will be on your site hold a White Card. If a sole trader subcontractor cannot produce their White Card, they cannot legally work on your site.

6. Safe Work Method Statement (SWMS) Capability

For high-risk construction work (as defined in the WHS Regulations — working at heights, work involving electricity, demolition, excavation, working near energised plant, and more), a Safe Work Method Statement must be prepared and followed.

Before engaging a subcontractor for work that involves high-risk construction activities, confirm that:

• The subcontractor understands their obligation to prepare a SWMS for high-risk work
• You have a process for receiving and reviewing their SWMS before work commences
• The SWMS is site-specific and describes the actual controls they will implement

As principal contractor, you must ensure that a SWMS exists for all high-risk construction work on your site. You don't have to write it yourself, but you do have to ensure it exists and is being followed. A subcontractor who cannot or will not produce a SWMS for high-risk work should not be allowed to commence that work.

Ongoing Obligations Once the Subcontractor Is On Site

Pre-engagement verification gets the relationship started on the right foot. But your obligations continue throughout the subcontractor's time on your site.

Site Inductions

Every person who comes onto your site — employees, subcontractors, and the subcontractor's workers — must complete a site induction before they commence work. The induction should cover:

• Site rules and the WHS management plan
• Emergency procedures (evacuation routes, assembly point, first aid locations)
• Specific hazards on your site (existing services, proximity to traffic, overhead lines)
• Reporting requirements for incidents, near misses, and hazards

Document your inductions. A sign-in register recording that each person completed the induction, and when, is essential evidence that you met your obligations if something later goes wrong.

Access to and Compliance with SWMS

Once a subcontractor has provided their SWMS for high-risk work, your job is not done. You must monitor that the work is actually being performed in accordance with the SWMS. This means:

• Regular site inspections by you or your site supervisor
• Stopping work if you observe the SWMS not being followed
• Requiring the SWMS to be revised if site conditions change in a way that affects the controls

A SWMS that sits in a folder on the site office desk while workers do something different on the ground is not compliance — it is a paper trail that demonstrates you had the SWMS but didn't act on it.

Superannuation Obligations

Whether you owe super on payments to a subcontractor depends on the nature of the engagement. The rules here are frequently misunderstood.

Under the Superannuation Guarantee (Administration) Act 1992, super guarantee contributions are payable to a contractor (even a genuinely independent one) if they are engaged wholly or principally for their labour under a contract that is wholly or principally for their labour.

In practical terms, this catches many sole trader subbies in construction. If you engage a sole trader plasterer, concreter, or painter and you are paying them for their personal work (rather than paying for a result they achieve using their own team and subcontracting arrangements), super is likely payable regardless of the fact that they have an ABN and invoice you.

The super guarantee does not apply where:

• The contractor employs or engages others to perform the work
• The contract is genuinely for a result (not for labour), and the contractor's labour is only incidental to achieving that result

If in doubt, apply super to sole trader subcontractor payments. The ATO has guidance on the contractor super guarantee test and can assess for unpaid super, interest, and the Superannuation Guarantee Charge.

The Employee vs Contractor Distinction

Separate from the super question is the broader question of whether your "subcontractor" is actually an employee. This matters for PAYG withholding, leave entitlements, the applicable modern award, and workers compensation.

Following the High Court's 2022 decisions in CFMMEU v Personnel Contracting Pty Ltd and ZG Operations Australia Pty Ltd v Jamsek, the written terms of the contract are a primary consideration — but the totality of the relationship still matters. Factors that point toward employment include:

• The person works exclusively or almost exclusively for your business
• You dictate the hours and method of work (not just the result)
• The person uses your tools and equipment
• The person cannot subcontract or delegate the work to someone else
• The person does not bear financial risk for defects or delays
• There is no genuine ABN-registered business identity separate from working for you

If your subcontractor relationship looks like employment in substance, you carry employment law exposure — including Fair Work Act obligations, award entitlements, and the obligation to pay PAYG withholding.

Security of Payment Obligations

Every state and territory has security of payment legislation protecting subcontractors' rights to be paid. As the head contractor, you have specific obligations when a subcontractor makes a valid payment claim.

| State | Legislation | | ----- | ----------------------------------------------------------------- | | NSW | Building and Construction Industry Security of Payment Act 1999 | | VIC | Building and Construction Industry Security of Payment Act 2002 | | QLD | Building Industry Fairness (Security of Payment) Act 2017 | | WA | Construction Contracts Act 2004 | | SA | Building and Construction Industry Security of Payment Act 2009 | | TAS | Building and Construction Industry Security of Payment Act 2009 | | ACT | Building and Construction Industry (Security of Payment) Act 2009 | | NT | Construction Contracts (Security of Payments) Act 2004 |

When a subcontractor makes a valid payment claim:

• You must respond within the legislated timeframe (typically 10-15 business days depending on jurisdiction) with either payment or a payment schedule identifying any disputed amount
• If you fail to respond, you may lose the right to dispute the claim amount
• Subcontractors can pursue unpaid amounts through a rapid adjudication process

Do not ignore payment claims. Even if you dispute the amount, a failure to respond procedurally can create an enforceable debt regardless of the merits of the underlying dispute.

Record-Keeping for Subcontractor Compliance

Good record-keeping is the backbone of defensible subcontractor compliance. Maintain a file for each subcontractor that includes:

• ABN verification (printed screenshot from ABR Lookup with date)
• Workers compensation Certificate of Currency (and renewal dates diarised)
• Public liability Certificate of Currency (and renewal dates diarised)
• Trade licence verification (screenshot from licensing register with date)
• Copy of White Card (or confirmation of sight)
• Signed site induction record
• Copies of all SWMS provided for high-risk work on your site
• Contracts and subcontract agreements
• Payment claims and payment schedules
• Super contribution records (if applicable)

This file gives you the evidence you need if a WHS regulator, the Fair Work Ombudsman, or the ATO ever asks questions about your subcontractor engagement practices.

Building a Scalable Subcontractor Compliance System

For small construction businesses that use multiple subcontractors regularly, the volume of pre-engagement checks and ongoing obligations can quickly become unmanageable without a system.

A practical system includes:

1. A pre-engagement checklist — a standard form or digital checklist that is completed before any new subcontractor commences work. Nothing starts until every item is ticked
2. A subcontractor register — a centralised record of all active subbies, their licence and insurance details, and renewal dates
3. Calendar reminders — set for 60 days before each certificate of currency or licence expires
4. A site induction register — signed by every person entering the site, with date and name
5. A SWMS register — tracking which SWMS have been received, reviewed, and approved for each subcontractor and work activity
6. A payment claims log — tracking receipt of payment claims and your response obligations

The goal is to make compliance a standard part of how work starts and proceeds — not a scramble that happens after something goes wrong.

How Reguladar Helps

Subcontractor compliance sits alongside your WHS obligations, builder's licence requirements, employment law, super, and tax obligations. Keeping all of these in view while actually running a construction business is a significant task.

Reguladar gives Australian construction businesses a single compliance dashboard tracking every obligation — including subcontractor-specific checks, insurance renewal dates, and WHS requirements — in one place. You get alerts before deadlines, not after.

Start your free compliance check at Reguladar →

This article is general information only. Subcontractor compliance requirements vary by state and territory. Seek legal or specialist compliance advice for your specific situation.