BAS stands for Business Activity Statement — a form the Australian Taxation Office (ATO) uses to collect several tax obligations from your business in one go, on a regular schedule, rather than one at a time throughout the year. If you’re GST-registered, you’re required to lodge one. Here’s what that actually means in practice.
What goes into a BAS
Depending on your business, a BAS can include:
- GST you’ve collected on sales, and GST you’ve paid on business purchases (the difference is what you owe or get refunded)
- PAYG withholding — tax withheld from employee wages
- PAYG instalments — prepayments toward your own expected income tax
- Fuel tax credits, if your business claims them
- Fringe benefits tax instalments, for businesses that provide fringe benefits
Most small businesses will mainly be dealing with the first two — GST and PAYG withholding.
Who actually needs to lodge one
Any business registered for GST needs to lodge a BAS. GST registration itself is compulsory once your business turns over more than the current threshold (correct at time of writing — worth confirming your specific position with us or the ATO, since thresholds and your own circumstances can differ). Many smaller businesses register voluntarily even under the threshold, usually so they can claim GST credits on purchases — which then means BAS becomes a regular obligation too.
How often you lodge
Most small businesses lodge quarterly. Larger businesses (generally $20 million+ turnover) are required to lodge monthly, and some smaller businesses choose to for tighter cash flow visibility. A small number of very small businesses on a simplified GST reporting method lodge annually instead. See our full BAS due dates guide for the exact dates for each cycle.
BAS vs your tax return — not the same thing
A BAS is not your income tax return. It’s a separate, more frequent lodgment covering GST and withholding obligations, generally lodged quarterly or monthly. Your tax return is the annual reconciliation of your actual income tax position, usually prepared by an accountant. The two are related — good BAS records make tax time faster and more accurate — but they’re not interchangeable, and mixing them up is one of the more common sources of confusion we see. For the fuller picture on how the two fit together, see our guide to bookkeeping vs accounting.
How Dedicated Bookkeeping handles this for you
As a registered BAS agent, preparing and lodging your BAS is core to what we do — but it’s built on the back of bookkeeping that’s accurate and current, not reconstructed from a shoebox of receipts the week it’s due (if that’s where things currently stand, our guide on catching up on bookkeeping that’s fallen behind is a good place to start). That’s the difference between a BAS that’s technically lodged and one you can actually trust the numbers on. It’s part of the same real-time financial clarity that also feeds into cash flow forecasting and reporting, if and when you want to go beyond just staying compliant.
If you’re not sure whether you’re even registered correctly, or your BAS has become more guesswork than process, that’s a quick and useful conversation to have.
Frequently Asked Questions
What is a BAS statement?
A Business Activity Statement is a form the ATO uses to collect several tax obligations from a GST-registered business at once — mainly GST and PAYG withholding — on a regular (usually quarterly) schedule.
Who needs to lodge a BAS?
Any business registered for GST. GST registration is compulsory once turnover passes the current threshold, and optional (but common) below it.
How do I lodge a BAS statement?
Directly through the ATO’s online business portal or myGov, or through a registered BAS agent who lodges electronically on your behalf — often with extra time under the agent lodgment concession.
Is a BAS the same as a tax return?
No. A BAS covers GST and withholding obligations, usually lodged quarterly. Your tax return is the annual reconciliation of your income tax position, typically prepared by an accountant.