BAS Calculator
Calculate your net GST payable (or refund) and total Business Activity Statement payment including PAYG withholding.
How to Complete Your BAS
Your Business Activity Statement (BAS) brings together several tax obligations into a single lodgement. Understanding each component helps you avoid errors and penalties.
GST Section (G-labels)
The GST section requires you to report total sales (G1), export sales (G2), other GST-free sales (G3), and GST on sales (1A). On the purchases side, you report total purchases (G10), capital purchases (G11), and GST on purchases (1B). Net GST = 1A minus 1B.
PAYG Withholding (W-labels)
If you have employees, you must report the total wages paid (W1) and the tax withheld (W2). The withheld amount is paid directly to the ATO as part of your BAS. Failure to remit PAYG withholding incurs significant penalties.
PAYG Instalments (T-labels)
The ATO may require self-employed individuals and investors to pay PAYG instalments toward their own income tax. The instalment amount (T7) is set by the ATO based on your prior year income. You can vary it if your income has changed significantly.
Lodgement and Payment
Most small businesses lodge quarterly. Your BAS can be lodged online through myGov, your accounting software, or via a registered tax agent. Payments can be made via BPAY, EFT, or the ATO's online payment portal.