BAS, GST & Tax Basics (AU)
What an owner-operator actually needs to understand, in plain language.
Notes from Randall Harper. Thirty years working alongside owner-operators, executives and boards — companies of all types and sizes — across entertainment & media, hospitality, service based business, lifestyle businesses, financial services, retail and not-for-profit, in Australia, Asia, the United Kingdom and the United States. What follows is the thinking I keep returning to.
The mental model that helps
GST is not your money. It never was. From the moment a customer pays you, the GST portion belongs to the ATO and is sitting in your account on its way through. Owners who get into trouble with BAS almost always do so because, somewhere along the way, that money started feeling like working capital. Treat GST as a liability the second it arrives and most BAS pain disappears.
Set up the accounts that protect you
Open a separate, high-interest holding account. Every time money lands in your operating account, immediately move the GST portion — and a reasonable estimate of income tax — into the holding account. This is not financial sophistication; it is mechanical hygiene. The owners who never have a BAS surprise are not the ones with better accountants; they are the ones who never let the money mingle in the first place.
What the ATO expects, quarterly
- GST collected on sales, minus GST paid on purchases.
- PAYG withheld from employees' wages.
- PAYG instalments toward your own income tax.
- Any FBT, fuel tax credits, or wine equalisation tax that applies.
- Lodged and paid on time — late lodgement is one of the cheapest ways to put yourself on the ATO's radar.
Working with a bookkeeper and accountant
A good bookkeeper is one of the highest-ROI hires a small business makes. They keep the books current, your BAS clean, and your accountant's bill lower. Your accountant is for strategy — structure, tax planning, year-end decisions — not for chasing missing receipts. Confusing the two roles is expensive in both directions. Pay for both, and use each for what they are actually good at.
What to do when you are behind
If your BAS is late or unpaid, the worst thing you can do is hide. The ATO is markedly more cooperative with owners who reach out first than with owners they have to chase. Payment plans are almost always available, often without penalty if you act early. Avoidance is the single most expensive emotional response to tax stress; a phone call you do not want to make is, almost always, cheaper than the alternative.
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The contents of this paper are the opinion of Clear Point Advisory only. Readers should rely on their own judgement and obtain professional advice appropriate to their circumstances.