Answers · 2026-27
I sell goods for A$3,485 before GST. How much GST do I add to the invoice?
The answer
A$349
on the invoice
Add A$349 GST, making the invoice total A$3,834 including GST.
How it was computed
| Sale value before GST | A$3,485 |
|---|---|
| GST rate | 10% |
| GST | A$349 |
| Invoice total including GST | A$3,834 |
Assumes the sale is a taxable supply and you are registered for GST. The page does not decide that.
Source
Ask it about your own figures.
The same working, with its source.