If you run a small business, there’s a good chance you’ve either engaged subcontractors already or you’re thinking about it.
Maybe you’ve landed a big job and need extra hands. Maybe you’re scaling and want flexible support without hiring employees. Or maybe your customer expects you to manage the entire project - even though you’ll outsource parts of it to specialists.
Whatever the reason, it’s important to understand the subcontractor definition in a legal sense. Misunderstanding what a subcontractor is (and how they differ from employees or independent contractors) can expose your business to disputes, unexpected costs, and compliance issues.
Below, we’ll break down what a subcontractor is in Australia, when they’re commonly used, what you’re responsible for as the hiring business, and the key documents that help protect you.
What Is A Subcontractor? (Subcontractor Definition)
A subcontractor is typically a person or business that is engaged by a contractor (or sometimes a head contractor) to perform a specific part of work under a broader contract.
In practical terms, your business might have a contract with a customer (the “head contract”), and you then bring in someone else to do a portion of that work. That person is usually your subcontractor.
Common Examples Of Subcontractors
- Construction: a builder hires an electrician, tiler, or plumber for parts of a build.
- IT and software: an agency hires a developer to build a feature or complete sprint work.
- Marketing: a marketing consultancy hires a videographer or copywriter for a client campaign.
- Events: an event planner hires a photographer, caterer, or AV provider.
The key idea is that your business remains responsible to your customer for the overall job, even if you subcontract parts of it out.
Do Subcontractors Always Have ABNs?
Often, yes - many subcontractors operate their own small business and invoice you using an ABN. But having an ABN (or issuing invoices) isn’t the only factor that matters for legal classification.
What matters is the reality of the working relationship, not just the label you put on it.
Subcontractor Vs Contractor Vs Employee: What’s The Difference?
One of the biggest risk areas for small businesses is assuming “subcontractor” just means “not an employee.” In reality, the difference between a subcontractor, contractor, and employee can be nuanced - and it matters for pay, tax, superannuation, liability, and Fair Work compliance.
Subcontractor Vs Independent Contractor
In many situations, a “subcontractor” is also an “independent contractor” - they’re just a contractor engaged by another contractor.
For example:
- You have a contract with a customer to deliver a renovation.
- You engage a carpenter to do the framing work.
- That carpenter is your subcontractor (and is generally an independent contractor to you).
The term subcontractor is often used to describe the position in the chain (they sit under your contract), while contractor is the broader category of someone you engage in a non-employment arrangement.
If you want to formalise that relationship properly, it’s often done through a written Contractors Agreement (or a more specific subcontractor agreement tailored to the project and industry).
Subcontractor Vs Employee
An employee works in your business. A subcontractor works for your business (or alongside it), usually running their own business.
While every situation is different, these are common indicators:
- Control: Employees are usually told how, when, and where to do the work; subcontractors usually decide this themselves (within the project scope).
- Tools and equipment: Employees often use your tools/systems; subcontractors often use their own.
- Ability to subcontract/delegate: Employees generally can’t delegate their role; subcontractors may be able to delegate (depending on the contract).
- Risk and profit: Subcontractors often bear more commercial risk (and can make profit by pricing efficiently); employees are paid wages with less risk.
If what you really need is staff working ongoing hours under your direction, an Employment Contract may be the more appropriate (and safer) option.
Why Getting The Classification Right Matters
Misclassifying someone as a subcontractor when they’re effectively an employee can create serious issues, including:
- backpay claims for entitlements (like leave)
- superannuation issues (including where super may still be payable under the ATO’s rules for some contractor arrangements)
- tax withholding issues
- penalties for non-compliance
- contract disputes over responsibility and scope
From a business owner’s perspective, the goal isn’t just “pay less” or “stay flexible” - it’s to set up the engagement in a way that matches the real working arrangement and protects your business if something goes wrong.
When Should Your Business Engage Subcontractors?
Subcontractors can be a great option for small businesses - as long as you use them for the right reasons and put the right paperwork in place.
Common Situations Where Subcontracting Makes Sense
- You need specialist skills: for example, bringing in a licensed trade or a specialist consultant for a component of a project.
- You’re managing peak demand: you have seasonal spikes or a one-off surge in work.
- You’re delivering a multi-part project: and you’re responsible for the whole deliverable, but you’ll outsource components.
- You’re expanding without committing to headcount: you want flexibility while you validate demand.
When Subcontracting Can Be Risky
Subcontracting can become legally risky if the arrangement starts to look like employment - for example, if the person works regular hours, only works for you, is closely supervised, and is embedded into your team like staff.
It can also be risky if you don’t control quality and deliverables properly. Remember: your customer contract is with you. If your subcontractor underperforms, delays the job, or causes damage, it’s often your business that has to manage the fallout.
Key Legal Obligations When Using Subcontractors In Australia
Even though subcontractors aren’t your employees, you still have legal obligations and commercial risks to manage.
1) You Still Owe The Customer The Deliverable
This is the most practical (and often most expensive) reality: if your subcontractor fails to deliver, your customer usually won’t accept “the subcontractor didn’t do it” as an excuse.
That’s why your subcontractor arrangement should align with your customer contract - especially around timelines, scope, quality standards, and what happens if work needs to be redone.
2) Work Health And Safety (WHS) Still Matters
In many industries (especially construction, logistics, manufacturing, and on-site services), you may still have WHS responsibilities for subcontractors on site or under your direction.
WHS duties can be complex because they depend on who controls the workplace, the nature of the work, and the state/territory regime. But as a general approach, you should treat safety as non-negotiable, even when the worker isn’t your employee.
3) Payment Terms And Deductions Need To Be Clear
A common subcontractor dispute is payment: what was agreed, what counts as “complete,” and whether deductions are allowed for defects or delays.
If you’re thinking about withholding amounts from what you pay a subcontractor (for example, because work is incomplete or needs rectification), you need to tread carefully and ensure your contract supports it. In practice, it’s usually safer to deal with this through clear contractual mechanisms (such as set-off rights, dispute processes, or requiring rectification) rather than informal “we’ll just take it out of the next invoice” arrangements.
It’s also worth noting that the Fair Work Act’s rules on wage deductions (including section 324 of the Fair Work Act) are aimed at employees, not genuine subcontractors. If your arrangement starts to resemble employment, that’s when Fair Work risks can arise - so it’s a good idea to get advice if you’re unsure how to structure payments and accountability.
4) Tax, ABNs, Invoicing - And Super Can Still Be Relevant
Subcontractors typically invoice you for their work, and your business pays those invoices under the agreed terms. That said, there are still practical compliance steps you should build into your onboarding process, such as:
- confirming the subcontractor’s ABN and registered details
- confirming whether they are GST-registered (and ensuring invoices are tax invoices where required)
- ensuring your payment terms are consistent and documented
Separately, even where someone is engaged as a contractor/subcontractor, there are situations where superannuation obligations can still apply under the ATO’s “contractor” rules (for example, where they’re paid mainly for their labour). Your accountant can help you confirm the correct tax and super treatment for your specific engagement, and your legal documents should align with how the relationship works in practice.
If subcontractors are dealing with your customers, quoting under your name, or accessing your systems, you should think about confidentiality and brand risk.
Depending on the engagement, you may want confidentiality obligations (and sometimes non-solicitation style clauses) so your subcontractor doesn’t misuse customer lists, pricing, or sensitive project information.
What Should Be In A Subcontractor Agreement?
If you engage subcontractors regularly (or even for a one-off high-value project), a written agreement is one of the simplest ways to reduce risk and set expectations.
In many cases, this will be a tailored Sub-Contractor Agreement.
While every business is different, here are key clauses we commonly recommend considering.
Scope Of Work (And What’s Out Of Scope)
This is where you clearly describe what the subcontractor is delivering. It should be specific enough that you can tell whether the work is “done” or not.
Where possible, include:
- deliverables and specifications
- milestones and deadlines
- who supplies materials/tools
- what approvals are required
Payment Terms
Spell out how and when the subcontractor gets paid, including:
- rates (fixed fee, hourly/day rate, milestone-based)
- invoicing process (who invoices, what must be included)
- payment timeframe (e.g. 7/14/30 days)
- whether you can withhold payment for defective or incomplete work (and the process for doing so)
Quality Standards, Rectification, And Defects
This is where you align expectations with what your customer expects from you.
You may want a clause covering:
- standard of workmanship/professional services
- what happens if the work is defective
- timeframes for fixing defects
- warranties (where appropriate)
To avoid “he said/she said” later, your agreement should clearly state:
- what the subcontractor supplies
- what you supply
- who pays for materials and consumables
- what happens if something is lost or damaged
Insurance And Liability Allocation
Insurance expectations are a big part of subcontracting relationships.
Your agreement might deal with:
- what insurance the subcontractor must hold (and provide evidence of)
- who is responsible if the subcontractor causes loss or damage
- limits on liability (where appropriate and enforceable)
This doesn’t remove your responsibility to your customer - but it can help you manage risk between you and the subcontractor.
Confidentiality And IP (Intellectual Property)
If your subcontractor is creating work for your client under your banner (designs, code, written content, plans, processes), make sure your contract covers:
- confidentiality obligations
- who owns the intellectual property created
- what rights the subcontractor has to reuse templates or materials
These issues often come up later when a business tries to reuse deliverables or when there’s a dispute about who owns the underlying work.
Subcontracting Further (Can They Delegate?)
Sometimes subcontractors want to engage their own subcontractors. That can be fine - but you should decide whether you allow it, and if so, on what conditions.
Common approaches include:
- no further subcontracting without your written consent
- allowed, but the original subcontractor remains fully responsible for the work
Termination And Exit Management
If the relationship isn’t working, you need a clear off-ramp. A good subcontractor agreement often sets out:
- how either party can end the arrangement
- what happens to work in progress
- handover obligations (files, materials, access)
- what gets paid on termination
This helps prevent a messy situation where a subcontractor walks away mid-project and you’re left without access to essential materials.
Key Takeaways
- A clear subcontractor definition is essential: a subcontractor is usually engaged to complete part of a broader contract you hold with a customer.
- Subcontractors often overlap with independent contractors, but the real classification depends on the working relationship - not just what you call it.
- Your business typically remains responsible to the customer for the overall outcome, even if the subcontractor causes delays, defects, or disputes.
- Key risk areas include WHS obligations, payment disputes, confidentiality, quality control, and misclassification issues.
- A well-drafted written agreement (like a Sub-Contractor Agreement or Contractors Agreement) is one of the best ways to reduce misunderstandings and protect your business.
If you’d like help setting up your subcontractor arrangements properly, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no-obligations chat.
