WA Payroll Tax Guide

How WA structures payroll tax

Western Australian payroll tax is administered by RevenueWA and applies once your Australian wage bill passes the WA threshold. WA's distinctive design feature is a diminishing threshold: as annual wages rise above the entry point, the deductible amount reduces, so mid-sized employers effectively pay on a larger share of their payroll than the headline threshold suggests. Larger employers can also face additional rate settings at higher wage tiers. RevenueWA publishes the current threshold, taper mechanics and rates — those figures change, so verify them there rather than relying on any static guide, including this one.

Wages: the broad definition

Taxable wages in WA include far more than base pay:

• Salaries, wages, commissions, bonuses and most allowances
• Employer superannuation contributions
• Fringe benefits at grossed-up value
• Directors' fees and remuneration
• Certain contractor payments — WA's approach to contractors differs in detail from the eastern states, focusing on whether the relationship is in substance employment, so don't assume rules from NSW or Victoria carry over
• Employee share scheme benefits and some termination payments

The recurring theme across audits is the same everywhere: super, fringe benefits and contractor payments are the three components most often missing from a business's self-assessed wage figure.

Grouping

Related entities are grouped for WA payroll tax — related companies, businesses under common control, and entities sharing employees. A group shares one threshold (and one taper calculation) and members are jointly and severally liable for each other's payroll tax. If your structure has more than one employing entity, work out your grouping position deliberately; RevenueWA can determine it retrospectively, with interest.

Employers paying wages both in WA and elsewhere have their threshold apportioned by the WA share of Australia-wide wages — and interstate wages may trigger registration obligations in those states as well.

Registration and the lodgement cycle

• Register with RevenueWA once monthly Australia-wide wages indicate you'll exceed the annual threshold
• Lodge and pay through Revenue Online — monthly for most liable employers, with some smaller payers permitted quarterly or annual lodgement, by RevenueWA's published due dates
• Annual reconciliation after 30 June, truing up the year's actual taxable wages, the diminishing threshold calculation and any interstate apportionment

Because of the taper, WA's annual reconciliation is more calculation-heavy than most states': the deductible amount depends on your final full-year wages, which you only know at year end. Employers who tracked a reliable taxable-wages number all year find this trivial; those who didn't often discover a shortfall.

Common problem areas

• The silent crossing — hiring growth plus super plus allowances pushes you past the threshold with no external prompt to register
• Underestimating the taper — budgeting payroll tax off the headline rate and full threshold, then finding the deduction was smaller than assumed
• Contractor assumptions imported from other states — WA's provisions have their own shape
• Grouping ignored across trading and service entities
• FIFO and remote workers — where wages are taxable can be genuinely complicated for workforces that move; get advice rather than guessing

Running it as a system

The businesses that never have payroll tax problems aren't the ones with the smartest accountants — they're the ones where the monthly close produces a taxable-wages figure automatically, the contractor register is current, and lodgement dates sit in a compliance calendar nobody has to remember. That's the pattern behind a modern SME back office. Everything here is general information rather than tailored advice: current WA thresholds, rates and due dates are on the RevenueWA website, and a registered adviser can apply them to your facts.