GST and BAS Calculator | Estimate Payable or Refund
Use our GST and BAS calculator to enter sales and expenses and get an instant estimate of GST payable or refund for your BAS.
✅ GST & BAS Calculator
Enter your sales and expenses (including GST) to see a quick GST owed or refund estimate and a BAS preview. ⚠️ This is a guide only. Always talk to a registered accountant before lodging.
Total Sales (inc GST)
Total Expenses (inc GST)
BAS Period
⚠️ Figures are estimates only. Consult a registered accountant for accurate BAS lodgements.
💡 How It Works
- Enter total sales
Input your total sales including GST for the BAS period. - Enter total expenses
Include all GST‑inclusive expenses eligible for credits. - Select your BAS period
Choose monthly, quarterly, or annual depending on how you lodge. - Click “Calculate GST & BAS”
Instantly see: - ✅ GST collected on sales
- ✅ GST credits on expenses
- ✅ Net GST payable or expected refund
- Get professional help
Use the Talk to an Accountant to Lodge button to connect with a registered tax agent for accurate BAS lodgement.
✨ Figures are a guide only. Always consult a registered accountant before lodging your BAS.
⚠️ General Disclaimer
The information and tools provided on this website are for general guidance and informational purposes only. While we strive to ensure accuracy and usefulness, all content is provided “as is” without any guarantees. We make no representations or warranties about the completeness, reliability, or suitability of this information for your specific situation.
You acknowledge that any actions you take based on information from this website are at your own risk. We recommend seeking independent professional advice before making decisions or purchases. To the fullest extent permitted by law, we disclaim all liability for any loss, damage, or expenses arising from the use or reliance on our content or tools.