Western Australia Payroll Tax Calculator

Worked examples (FY 2026/2027)

These results are computed live by the calculation engine at page render — they cannot drift from the calculator above.

Registration & lodgement

Western Australia payroll tax threshold history

Since FY 2021/2022, the annual payroll tax threshold in Western Australia has not changed at all. In FY 2026/2027 it is $1,000,000. The table below shows the threshold and headline rate for every financial year currently tracked in the engine. These values are drawn directly from the statutory registry, so if a legislative amendment is recorded there it will automatically appear here.

Rates and thresholds should be confirmed against the official Pay-roll Tax Assessment Act 2002 (WA)and the relevant state revenue office website before lodgement.

WA's taper window is the widest in the country

Western Australia applies a flat 5.50% with a diminishing deduction: deduction = $1,000,000 × ($7,500,000 − Australian wages) ÷ $6,500,000, clamped to the range $0 to $1,000,000. The taper runs from $1,000,000 to $7,500,000 of national wages — a far wider window than Victoria's $3,000,000 to $5,000,000 — so a partial deduction survives much longer as a group grows. There is no regional rate differential.

For a practice with $3,000,000 of WA wages the apportioned deduction is $692,308 and the taxable amount is $2,307,692, producing a liability of $126,923.08. The same wages in NSW would attract a full $1.2M deduction on a single-state basis, which is why a state-by-state comparison on identical wages misleads, and why the calculator runs each jurisdiction on its own rules.

The slope of the taper is what distinguishes WA. The deduction falls by roughly 15 cents for every extra dollar of Australian wages — $1,000,000 spread over $6,500,000 — against 50 cents in Victoria and 25 cents in Queensland. A WA group therefore keeps a partial deduction long after a Victorian or Queensland group of the same size has lost most of its shelter, so the same national wage total produces very different outcomes across the three taper states.

WA does not use the relevant contract provisions for medical practices

This is the most important structural difference in the country. Western Australia does not apply the harmonised relevant contract provisions to medical practices, so a Service Facility Agreement does not automatically produce deemed wages. Assessment proceeds on the common-law totality of the relationship, and the medical worksheet returns an indicia checklist rather than a deemed wages figure.

The indicia are the ordinary employment markers: who controls how, when and where the work is done; whether the practitioner is integrated into and presented as part of the practice; whether they can delegate; who provides the rooms and equipment; who bears commercial risk; and whether they are free to work for other practices. An arrangement that would plainly create deemed wages in NSW may produce no payroll tax in WA — but the analysis is less mechanical and correspondingly harder to predict.

What to watch for in WA

Two cautions apply. First, the reported large-employer rates of 6% above $100,000,000 and 6.5% above $1,500,000,000 of Australian wages could not be confirmed from RevenueWA's published material at build time. The calculator flags this rather than guessing, and a group of that size should verify the position with RevenueWA directly.

Second, WA's mineral resources sector grouping rules can pull related entities into a single group more readily than the general grouping provisions. Because WA has no medical-specific relief, a practice's only levers are the threshold, the taper window and the choice of Designated Group Employer — which makes the grouping analysis more consequential here than in a state where a GP exemption would absorb the deemed wages anyway.

Evidencing the common-law position in WA

Because WA does not use deemed wages, a practice cannot complete the assessment on its own with certainty — the characterisation is ultimately the revenue office's. What the practice can do is build a record that supports its own conclusion, so that if the position is ever tested the indicia are documented rather than reconstructed after the fact.

That means written agreements reflecting genuine independence, evidence that practitioners bear their own costs, equipment and professional indemnity, records showing practitioners are free to and do work elsewhere, and a pattern of behaviour consistent with the agreement. Where those indicia are absent — set sessions, practice-provided rooms and reception, patients billed in the practice's name — the arrangement leans toward employment, and the absence of the relevant contract provisions does not make the exposure disappear.