Guides
The bits that actually trip people up.
Short, specific, and written for someone who needs to get an invoice out today — not a tax textbook.
- 01
How to calculate GST
Multiply by 1.1, divide by 11, and why taking 10% off a total is the most common GST mistake in Australian bookkeeping.
- 02
What is a tax invoice
The fields the ATO expects, the difference from an ordinary invoice, and the extra one required at $1,000.
- 03
GST-free items
What is GST-free, what is input taxed, and why a loaf of bread and a sandwich are treated differently.
- 04
When to register for GST
Turnover not profit, the forward-looking test, and exactly what changes on your invoices the day you register.
- 05
Invoice mistakes
The seven errors that get an invoice pushed to the bottom of the pile — and why most late payments are not disputes.