I got a payroll tax assessment — what happens next

An assessment notice — or a reassessment, if it revises a figure you’ve already lodged — usually turns up after an audit, a correction to a return, or a voluntary disclosure you or your accountant made. Whatever the trigger, the notice itself starts a clock, and knowing what that clock does matters more than the number on the page.

How an assessment actually arrives

The path to an assessment differs depending on how it was triggered. Under Revenue NSW’s audit process, a business typically receives a finalisation letter setting out the audit’s findings first, followed by the formal assessment notice — with payment due 21 days after the notice’s issue date. That’s a short window, and it runs alongside, not instead of, the separate 60-day objection window described below — you can be inside your objection period while also already past your payment due date if you don’t act quickly.

A different path runs through self-correction. In Queensland, a business can initiate its own reassessment through QRO Online for a periodic return, or by email for a final annual return, without waiting for an audit to catch the issue — and QRO’s guidance explicitly allows a taxpayer to request a reassessment where they later identify theyoverpaid, within a set window from the original assessment. This is worth knowing precisely because it runs in the opposite direction from most of this article: it’s the mechanism for getting money back, not for disputing money owed.

You generally have 60 days to object

NSW, VIC and QLD all give you a 60-day window to formally object to an assessment or reassessment — but the exact starting point differs in wording, which is worth reading carefully rather than assuming:

• NSW — 60 days from the assessment or decision being made, with extensions available if you provide written reasons for a late objection.
• VIC — 60 days from the date of the assessment, reassessment or decision, lodged on form GEN-Form-04. Late objections need a written explanation or they’re invalid.
• QLD — 60 days from receiving the assessment or decision notice, not from the date printed on it.

If a notice has sat unopened for a week or two, that distinction between “made” and “received” can matter. Don’t assume — check the specific date your state’s notice gives you and count from there, and if you’re close to the deadline, lodge the objection before spending more time confirming the exact figure.

Worked example: a straightforward audit timeline

To make the sequence concrete: imagine an audit begins, the revenue office reviews several years of records, and issues a finalisation letter setting out a proposed shortfall. The formal assessment notice follows shortly after. From the date that notice is issued (in a NSW-style process), the business has 21 days to pay, and separately, 60 days from the assessment to lodge a written objection if it disagrees with the finding. These two clocks run in parallel, not in sequence — a business that spends three weeks gathering evidence before deciding whether to object may already be past the payment deadline, accruing interest, even though it’s still well within its objection window. The practical response most revenue offices point to is to pay the assessed amount to stop the interest clock, and separately pursue the objection on its merits — the two aren’t mutually exclusive.

What a written objection actually needs to contain

Across all three states, an effective objection is a specific, quantified disagreement, not a general statement that the figure feels wrong. At minimum, that means identifying exactly which part of the assessment you dispute — a particular wage category included that shouldn’t have been, an apportionment calculation you believe is wrong, a grouping determination you disagree with — and setting out, with supporting figures, what you say the correct position is. Vague objections are harder for a revenue office to act on quickly, and a slow-moving objection is still accruing interest on the disputed amount the whole time it’s under consideration. If the dispute turns on a technical interpretation — whether a particular payment counts as wages, or whether a particular contractor exemption applies — attaching the specific ruling or guidance you’re relying on strengthens the objection considerably more than asserting your own reading of the legislation.

Interest keeps accruing while you object

In all three states, lodging an objection does not pause interest, and generally doesn’t pause the payment due date either — QRO states this explicitly. The common advice from all three revenue offices is the same: pay the assessed amount while your objection is considered, to limit interest exposure, and you’ll be refunded (with interest) if the objection succeeds. Objecting specifically to the interest component itself is described by SRO Victoria as usually unsuccessful, since unpaid tax interest is treated as compensation for the state, not a penalty you can argue away on fairness grounds — a distinct concept from penalty tax, which is punitive and does have its own objection avenues.

If the objection doesn’t resolve it

Each state provides a path to external review beyond the revenue office itself: the NSW Civil and Administrative Tribunal in NSW, the Victorian Civil and Administrative Tribunal in Victoria, and the Queensland Civil and Administrative Tribunal in Queensland, each with a further appeal path to the relevant state Supreme Court. These are formal legal processes with their own filing deadlines — get advice from a registered tax agent or lawyer before proceeding down this path, rather than relying on a general guide like this one.

Common mistakes business owners make here

• Counting the objection deadline from the wrong date. Confirm whether your state counts from the notice date or the date you received it.
• Assuming paying the assessed amount means you’ve given up your right to object. It doesn’t — you can pay to stop interest and still formally object to the underlying figure.
• Assuming the process pauses once an objection is lodged. Interest, and usually the payment due date itself, keep running regardless.
• Missing the separate, shorter payment deadline that can run alongside the 60-day objection window — particularly in an audit-driven assessment, where the payment deadline can be materially shorter than the time you have to formally object.
• Not checking whether you’re owed a refund. If a self-review turns up an overpayment rather than an underpayment, a reassessment request can go the other way — this is easy to overlook when the mental frame is “audit defence” rather than “check my own numbers.”

What to do next

1. Record the exact date the notice was issued and the date you actually received it.
2. Recalculate your own liability independently using the comparison calculator, paying particular attention to whether interstate apportionment or grouping might explain a figure that looks higher than expected.
3. Gather documentation supporting your position before the objection deadline, not after.
4. If cash flow allows, pay the assessed amount to stop interest accruing while your objection is considered — this doesn’t forfeit your right to dispute the figure.
5. Engage a registered tax agent or lawyer for anything beyond a straightforward figure dispute, particularly if the matter is heading toward tribunal review.