Medical Practice Payroll Tax — Western Australia

What this means for your practice

The medical worksheet does not produce a deemed wages figure for WA — there is no mechanical relevant-contract test to apply. Instead, the common-law indicia (control, integration, delegation, provision of equipment, financial risk, ability to work for others) determine whether a practitioner is an employee for payroll tax purposes. This is a factual assessment that requires specialist advice. There is no bulk-billing relief in WA. Because the framework is common-law rather than deemed-wages, the answer turns on the whole relationship, not a single factor: a practitioner who works set sessions in the practice's rooms, using its equipment and reception and seeing the practice's patients, leans toward employment, while one with their own rooms, own patients and genuine financial risk leans the other way. Document the indicia you rely on.

Payroll tax threshold context

Western Australia threshold: $1,000,000 (FY 2026/2027). Deemed wages plus employed staff wages are tested against this threshold.

Why WA does not begin with a deemed wage

In Western Australia a Service Facility Agreement does not automatically throw up deemed wages, because the state does not apply the harmonised relevant contract provisions to medical practices. The calculation does not start from a remitted amount; the worksheet offers an indicia checklist and a figure built on employed staff wages alone.

That figure should be treated as a floor rather than an answer, because it says nothing about the contractor practitioners until the common-law question is settled.

The common-law test WA applies

What matters in WA is the ordinary employment picture: who directs how, when and where the work is done; how far the practitioner is integrated into and presented as part of the practice; whether the work is personal or can be handed to someone else; who supplies rooms, equipment and support; who carries commercial risk; and whether the practitioner is free to work elsewhere.

No single factor decides it. The revenue office weighs the relationship as a whole, which is why a written agreement does not settle the matter if the parties behave differently.

Building a WA common-law record

A practice can strengthen its position with agreements that reflect real independence, evidence that practitioners meet their own costs and indemnity, and records showing they work elsewhere. Where the picture points the other way — fixed sessions, practice-supplied rooms and reception, patients invoiced in the practice's name — the arrangement looks like employment.

Because the call is discretionary, the practice should document the indicia it is relying on rather than infer the answer from the label the parties have chosen.

What happens if a WA practitioner is an employee

If the revenue office treats a contractor practitioner as an employee at common law, that practitioner's payments enter the wage base in full. WA's deduction slides from $1,000,000 to nil between $1,000,000 and $7,500,000 of national wages, so a practice that looked sheltered can face a substantial liability once those payments are counted.

The absence of the relevant contract provisions does not reduce the exposure — it only changes how the exposure is worked out.

The WA documents that matter

The file should contain the practitioner agreements, evidence of how the parties actually behaved, the records showing who invoices and who is paid, and the group structure identifying the Designated Group Employer.

Where the practice is connected to a mining or resources business, it should also check whether WA's resources-sector grouping rules sweep related entities into one group, because only the Designated Group Employer holds the deduction.

WA arrangements most at risk

The arrangements most at risk are those that look like employment in substance: regular fixed sessions, practice-supplied facilities, patients invoiced in the practice's name.

A practice working in both WA and an eastern state should not assume the two reach the same view of one contract — the eastern state may apply the relevant contract provisions where WA does not.

What a WA practice can and cannot settle for itself

Because Western Australia does not use deemed wages, a practice cannot finish the assessment on its own with certainty — the characterisation is ultimately the revenue office's to make. What the practice can do is reach a reasoned view and document it, so that if the position is ever tested the indicia are on file rather than reconstructed afterwards.

The practical consequence is that a WA practice should not treat the absence of the relevant contract provisions as a safe harbour. It removes the mechanical deemed-wage test, but it substitutes a discretionary common-law test that turns on the facts of the relationship, and the facts are within the practice's control only to the extent it documents them.

The WA practitioner who works across several practices

A practitioner who works at more than one practice is a common feature of WA medical practice, and the ability to work elsewhere is one of the common-law indicia that points away from employment. A practitioner with their own patients, their own rooms elsewhere and genuine freedom to decline work looks less like an employee than one who works exclusively at a single practice.

The practice should be able to evidence that pattern if it relies on it: agreements that permit work elsewhere, records showing the practitioner does work elsewhere, and an absence of the exclusivity and set-session arrangements that suggest control. The indicia are weighed together, so a single strong factor does not settle the question.

The same WA contract signed in an eastern state

A practice operating in WA and an eastern state signs the same form of Service Facility Agreement in both places, but the two jurisdictions read it differently. The eastern state applies the relevant contract provisions and may treat the remitted amount as deemed wages on the face of the document; WA ignores those provisions and looks at how the parties actually behave.

That divergence is worth planning for. An arrangement that is defensible in WA because the relationship is genuinely independent may still create deemed wages in the eastern state, and a practice with operations in both should assess each jurisdiction on its own framework rather than assume one answer covers the group.

What the WA figure reflects

Because WA does not use deemed wages, the calculator's WA figure reflects employed staff wages only. Take a WA practice with $2,000,000 of staff wages and $2,000,000 remitted to contractor practitioners. The tapered deduction is $846,154, leaving $1,153,846 taxed at 5.50% — about $63,462.

That figure is a floor, not a final answer. If the revenue office concluded that the contractor practitioners were employees at common law, their $2,000,000 of payments would be added to the base and the liability would rise sharply. The WA number tells a practice what it owes on the wages it is certain about, and leaves the contractor question to a common-law assessment.