If you’ve ever stared at a payroll tax registration notice and thought “wait, don’t I already send tax to the ATO every fortnight?” — you’re not alone. Of all the questions we field from Australian business owners, the mix-up between payroll tax and PAYG withholding is one of the most common. They both involve the word “tax,” they both relate to what you pay your staff, and they both show up on your compliance calendar. Beyond that, they’re almost entirely different systems.
Getting them confused isn’t just a paperwork slip. Businesses have been caught out either overpaying because they assumed PAYG covered their payroll tax obligation, or — more commonly and more expensively — under-registering for payroll tax because they didn’t realise the threshold had crept up on them. Below, we break down exactly how the two differ, who administers each one, and where employers most often trip up.
The core difference in one line
PAYG withholding is money you withhold from your employees’ pay and forward to the Australian Taxation Office on their behalf — it’s their income tax, prepaid.
Payroll tax is a separate tax your business pays on its total wages bill, once that bill crosses a threshold — it’s your tax, administered by your state or territory revenue office, not the ATO.
That distinction — whose tax it is, and who administers it — is the root of nearly every point of confusion below.
PAYG withholding: collecting tax on behalf of your employees
PAYG (Pay As You Go) withholding is a federal system administered by the ATO. As an employer, you’re required to:
- Withhold tax from wages, salaries, and certain other payments based on ATO withholding schedules and the information on each employee’s TFN declaration
- Report withheld amounts through Single Touch Payroll (STP) each pay run
- Remit the withheld amounts to the ATO, generally through your Business Activity Statement (BAS) or Instalment Activity Statement (IAS), depending on your withholding volume
- Provide employees with an income statement (via STP, this is now automatic) summarising the year’s earnings and tax withheld
Crucially, PAYG withholding applies from your very first employee and your very first dollar of wages. There’s no threshold — if you employ someone, you’re in the PAYG system.
Payroll tax: a state tax on your total wages bill
Payroll tax is a completely separate obligation, legislated and collected by each state and territory government rather than the Commonwealth. It’s a tax on the business itself, calculated on total taxable wages once your wages bill exceeds the relevant state threshold.
For NSW-based employers, the current annual threshold is $1,200,000, with payroll tax charged at 5.45% on wages above that amount. Each state and territory sets its own threshold and rate, and they don’t align — a business with staff in NSW, Victoria, and Queensland needs to check each jurisdiction separately, and may need to apportion the threshold across states if it pays wages in more than one.
What counts as “wages” for payroll tax purposes is broader than most employers expect. It generally includes:
- Gross salaries and wages
- Superannuation contributions
- Bonuses, commissions, and most allowances
- Fringe benefits (grossed up)
- Payments to certain contractors, where the relevant-contract provisions apply
That last point catches a lot of businesses out — engaging contractors instead of employees doesn’t automatically keep you out of payroll tax.
Unlike PAYG withholding, payroll tax registration isn’t automatic. It’s self-assessed: the responsibility sits with the business to monitor its wages bill and register once it crosses the threshold. Miss that step and penalties can be significant, sometimes calculated back to the date liability first arose.
Where employers most commonly get it wrong
1. Assuming PAYG withholding “counts” toward payroll tax. These are unrelated systems paid to unrelated bodies. Meeting your PAYG obligations to the ATO has no bearing on whether you owe payroll tax to your state revenue office.
2. Missing the payroll tax threshold because of super, bonuses, or contractors. Businesses often track payroll tax exposure against base salaries only, missing that super contributions, allowances, and eligible contractor payments push total taxable wages over the line earlier than expected.
3. Not realising payroll tax follows the group, not the entity. If a business owner runs multiple related entities, state revenue offices generally apply grouping provisions — wages are aggregated across the group, and only one threshold applies in total. Splitting staff across ABNs doesn’t create separate thresholds.
4. Treating “no PAYG withholding due” as “no compliance obligation.” Even where a pay run results in zero withholding — for example, wages below the tax-free threshold — STP reporting is still required. The reporting obligation and the withholding amount are separate things, and the ATO’s expanded use of STP Phase 2 data means discrepancies are picked up faster than ever.
5. Assuming interstate wages don’t matter. If you employ across state lines, most payroll tax thresholds are based on your total Australian wages, not just the wages paid within that state. A business can be well under a single state’s headline threshold and still be liable, once national wages are apportioned correctly.
A quick side-by-side
| Question | Payroll tax | PAYG withholding |
|---|---|---|
| Whose money is it? | The employee’s income tax | The employer’s own liability |
| Administered by | Australian Taxation Office (federal) | State/territory revenue office |
| Threshold to register | None — applies from employee one | Varies by state (NSW: $1.2M annual wages) |
| Reported via | Single Touch Payroll (STP), BAS/IAS | Self-assessed monthly/annual returns |
| Based on | Individual employee pay | Total group wages bill (incl. super, bonuses, some contractors) |
| Is there a threshold? | Yes, for payroll tax | No equivalent annual payroll threshold for the employer obligation |
Why this trips up growing businesses in particular
Payroll tax is often the tax business owners don’t think about until it’s suddenly relevant. A business hiring its first ten to twenty staff is usually well under the threshold and rightly focused on getting PAYG withholding and STP reporting right. But wage bills climb quickly with growth, bonuses, super guarantee increases, and new hires — and payroll tax registration is self-assessed, meaning nobody sends you a reminder. By the time it’s picked up in an audit, the exposure can span multiple periods.
This is exactly the kind of obligation that benefits from being monitored as part of routine payroll processing, rather than checked once a year at payroll year end.
Getting both obligations right, without the guesswork
E-Payoffice, have easily accessible payroll tax reports and PAYG/STP compliance allowing you to stay on top of your tax compliance. Our team is 100% Australian-based, we’re a registered BAS Agent, and every client query is answered within two hours — so if a threshold question comes up, you’re not left wondering for a week. Our processes are backed by ISO/IEC 27001, ISO/IEC 27701, and ISO 9001 certification, and your payroll data is hosted on Microsoft Azure’s Australian infrastructure.
If you’re not entirely sure where your business sits on either front, that’s a conversation worth having before an audit forces it — see how our outsourced payroll service handles this as part of everyday processing.
