How does an air conditioning business tell a subcontractor from an employee in Australia?

What actually decides whether a split system installer is a subcontractor or an employee?

According to the ATO, employees work in and are part of the business, while independent contractors provide services to a principal's business, and the real test looks at whether the work can be delegated or subcontracted on, and who supplies the tools and equipment used on the job (Employee or independent contractor). For an HVAC technician who brings on a second installer for a ducted job during a summer peak, or hands a split system install to a subbie with their own van and gear, the label on the invoice does not settle it. What settles it is whether that technician can send someone else in their place, who owns the ladders, the gauges and the refrigerant handling licence, and who carries the risk if the commissioning goes wrong.

The ATO is direct that some roles are always employees. Apprentices, trainees, labourers and trade assistants are always employees, never independent contractors, and wrongly treating an employee as a contractor is against the law (Hiring a new worker). An apprentice learning to wire a condenser or run ductwork under supervision is not a contractor arrangement no matter how the paperwork reads.

Why does this matter for GST, super and workers compensation on an HVAC job?

It matters because getting the label wrong does not just risk a fine, it can mean owing superannuation on labour the owner thought sat outside that system, or discovering a warranty callback technician was never covered for workers compensation at all. The ATO's superannuation guarantee tool explains that independent contractors paid mainly for their labour are eligible for super guarantee, calculated on the labour part of the invoice, and that this applies even where the contractor quotes an ABN (Work out if you have to pay super). A subcontracted installer brought in to cover a summer peak on ducted installs can still trigger a super obligation even though they invoice the business like any other supplier.

Workers compensation runs on its own test again. In New South Wales, icare says that other than deemed workers, a business is not required to provide workers compensation insurance for contractors, but a person hired as a contractor for tax purposes can still be a worker for workers compensation purposes (Classifying Workers or Contractors). Each state and territory scheme runs its own version of this, so an HVAC technician working across state lines on commercial maintenance contracts cannot assume one state's answer carries over to another.

How do you work out which test applies to your business?

You start by checking which test your business falls under, because the rule changed and now depends on timing and on the kind of business you run. The Fair Work Ombudsman says that constitutionally covered businesses now use the whole of relationship test, which looks at the real substance, practical reality and true nature of the relationship rather than any one clause in the contract (Whole of relationship test). Before that change, or where a worker has opted out, the Fair Work Ombudsman's building and construction page explains that the start of relationship test applies instead, and that contractors do not get employee entitlements because they are covered by separate laws including the Independent Contractors Act 2006 (Contracts in building and construction).

This is not something you want to be guessing at mid quote, especially once sham contracting is in the picture. The Fair Work Ombudsman describes sham contracting as misrepresenting an employment arrangement as an independent contractor arrangement, and says the defence for employers who get this wrong has changed (Independent contractor changes). If your business runs commercial maintenance contracts with employed technicians and leans on subbies for split system and ducted installs during the busy months, the two groups are not interchangeable on paper even when they do the same work on the same job.

How does this change your job costing and your margins?

Here is the part most HVAC technicians miss. Whether a technician is paid as a subcontractor or as an employee decides which line of your profit and loss that labour cost sits in, and that one booking decision is what quietly creates the gap between the margin a job was quoted at and the margin it actually banks. A subcontracted installer on a ducted job and an employed HVAC technician on a service agreement are the same labour dollar, but if one gets buried in overhead while the other sits in cost of sales, every job's gross margin is wrong before the job even starts.

This shows up hardest around hiring decisions. Bringing a role in house instead of paying a subcontractor only pays off if that subcontractor cost was properly sitting in cost of sales to begin with, not smoothed into overhead where it distorts the true margin on every job it touches. If the subcontractor was never costed against the job in the first place, swapping them for an employee does not fix the margin, it just moves the same mistake onto the next line.

Picture an HVAC technician who could not get an accurate cost of operations figure out of the business. Non-billable hours, callout travel, warranty callbacks and office time were loading a flat overhead cost onto every billable hour, which made every job on the board look barely profitable. Stripping those non-billable hours out to see the real number dropped the figure so low it was obviously wrong too, nowhere near what it actually cost to run a compressor change or a condenser swap. The real cost of operations sat somewhere between the two, hidden by labour that was never separated from overhead in the first place.

How can AI agents keep this sorted without eating your week?

An AI agent is software that does a job the way you would, using your prices, your wording and your rules, and for this question the job is keeping every technician's hours and pay correctly separated into cost of sales or overhead, job by job, as the work happens rather than at the end of the quarter. That is a data first way of working, because a decision made from memory about who was a subbie on which job months back is usually a decision made on an old picture, while the job and pay data from this week tells the truth for an HVAC technician trying to price the next quote properly.

AI agents can also carry the paperwork that follows the classification decision, matching invoices from subcontracted installers against the jobs they worked, flagging a labourer being paid like a contractor, or holding warranty callback hours separate from commercial maintenance contract hours so the real gross margin per job is visible without anyone pulling it together by hand at month end.

Where can you check the current rules?

• Employee or independent contractor: the ATO's main explanation of what separates an employee from a contractor, including delegation and who owns the tools.
• Whole of relationship test: the Fair Work Ombudsman's current test for constitutionally covered businesses.
• Hiring a new worker: confirms which roles are always employees and the risk of getting it wrong.
• Contracts in building and construction: explains the start of relationship test and the Independent Contractors Act 2006.
• Classifying Workers or Contractors: New South Wales workers compensation classification, as one example of a state scheme.
• Difference between employees and independent contractors: confirms the working agreement decides tax and super status and that classifying the worker is the owner's responsibility.
• Work out if you have to pay super: the ATO tool for checking super guarantee eligibility on contractor labour.
• Independent contractor changes: explains sham contracting and the changes to the employer defence.

This is general information, not legal, tax or employment advice. Check your own situation with the body named here or a qualified adviser.

How does Data First Coaching approach this?

Data First Coaching starts from the owner's own job and pay data through the Trade Business Intelligence, because the real question is never just subbie or employee, it is which jobs that labour sat against and what it did to the margin on each one. Greg Allan built his own trade business before coaching others, and he says plainly that “you don't have to pay a subcontractor and put a mark up on it”, which is the kind of overhead recovery gap his coaching goes looking for first. From there the how, the classification checks, the costing rebuild and the agents that keep it accurate, is worked through inside the Academy, with members, because the Trade Business Intelligence is powered by every member and the Academy is built for owners who are open minded, innovative and willing to share what they learn.