How to Calculate GST in 4 Steps
- 1
Enter the amount.
Use the taxable value or the tax-inclusive total, depending on the information available.
- 2
Choose inclusive or exclusive.
Specify whether GST is already included in the amount.
- 3
Enter the applicable rate.
Use the current rate for the relevant goods, services, jurisdiction, and transaction.
- 4
Review the breakdown.
Check the taxable value, GST amount, and final total against the invoice rules that apply.





