BAS estimator — roughly what you'll owe (or get back) this quarter.
For sole traders and small firms who want a heads-up before the BAS lands. Estimates net GST plus any PAYG so the 28th isn't a shock.
Sound familiar?
- “The BAS lands and you've already spent the GST you collected.”
- “You never know if it'll be a bill or a refund until you do it.”
- “PAYG instalments turned up and blew out the quarter.”
What this tool does
Estimates your quarterly BAS position: the GST you collected on sales, minus the GST credits on your business purchases, plus any PAYG you've withheld from staff and any PAYG instalment. Gives you a rough net figure to set aside.
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💡 Open a separate account and move the net GST across as you invoice — it was never your money. The quarterly BAS is generally due on the 28th after quarter-end (28 Feb for the Oct–Dec quarter).
What the law actually says
- •On your BAS, GST collected on sales (label 1A) minus GST credits on purchases (1B) gives your net GST. PAYG withholding (W) and PAYG instalments (5A) are added to that.
- •The GST inside a GST-inclusive amount is the amount divided by 11. This is an estimate — your accounting software or BAS agent produces the exact figures.
- •Guidance only, not financial advice.