What PAYG withholding pre-fill means¶

Pre-fill means the Australian Taxation Office (ATO) has already put a figure into a box on your Activity Statement, so you don't have to type it in yourself. For payroll, this means the ATO fills in your PAYG withholding boxes — the tax you take out of wages — from the pay reports you have already sent.

The two boxes it fills are W1 (the total wages you paid) and W2 (the total tax you withheld). These come from your Single Touch Payroll (STP) reports.

In one line

Pre-fill means the ATO fills W1 and W2 in for you from your STP reports — you don't type them, but you do check them.

Why this matters¶

Typing wage and tax figures by hand is slow and easy to get wrong. Pre-fill removes that step for the two payroll boxes. But knowing where the figure came from — and that it might not include your very latest pay — is what lets you check it properly instead of trusting it blindly.

What you will learn¶

What pre-fill means for PAYG withholding
Where the pre-filled W1 and W2 figures come from
Why pre-fill is a starting point, not the final answer

Understanding the concept¶

Every time you finalise a pay run, your software sends an STP report to the ATO with the wages paid and the tax withheld. The ATO adds up all your reports for the period and puts the totals into two boxes on your Activity Statement:

W1 — the total wages and other payments you made.
W2 — the total tax you withheld from those wages.

This is only available to employers who report through STP. The ATO fills these boxes from the reports it has received electronically.

It reflects what was reported by a cut-off. The pre-filled figure is made up of the STP reports the ATO had received and processed by a certain point. If a pay was reported after that cut-off, or has not been reported yet, it may not be in the pre-filled figure. That is why the amount is a starting point, not a guaranteed final total.

The ATO's guidance is clear that your own payroll records are your primary source. You compare the pre-filled figure to your records and correct it if needed before you lodge.

For accountants & bookkeepers

The ATO can only pre-fill the electronic Activity Statement from data sent through STP-enabled software, and only for W1 and W2 (not W3 or W4). The figure reflects STP reports processed by the cut-off for the period. The ATO's guidance is to treat software and payroll records as the primary source and to correct pre-fill to match them.

Example¶

Jordan runs a landscaping business with a handful of workers. When the BAS is due, Jordan opens the Activity Statement and sees W1 and W2 already filled in.

Jordan runs the payroll report for the same quarter and compares. The wages match, but the tax withheld is slightly lower than Jordan's records show. It turns out one late pay was reported just after the ATO's cut-off, so it was not yet in the pre-filled figure. Jordan updates W2 to match the payroll records, then lodges. Because Jordan treated pre-fill as a starting point and checked it, the statement went out right.

Common mistakes¶

Treating the pre-filled figure as final without comparing it to your payroll.
Forgetting that a very recent pay may fall after the cut-off and not be included.
Expecting pre-fill if you don't report through STP — it comes from STP reports.

How this works in myaccountant¶

In the app — because myaccountant reports each finalised pay run to the ATO through Single Touch Payroll, those reports are what the ATO uses to pre-fill W1 and W2 on your Activity Statement. You can run your payroll figures in the app to check the pre-filled amounts before you confirm them.

Key points¶

Pre-fill means the ATO fills in a figure so you don't type it.
For payroll it fills W1 (wages) and W2 (tax withheld).
It is available to employers who report through STP.
The figure reflects the STP reports received by a cut-off.
It is a starting point you check against your own payroll records.

Learn next¶

General information only — not tax, super or financial advice.

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