23/07/2026
Nobody sends you a letter when you cross the GST threshold. 📬
That is the part that catches people out. The threshold is currently $75,000 for most businesses — but it is tested on a rolling 12 months, both backward and forward. Not your last tax return. Not the financial year. A good run of work can push you over before the money has even landed in your account.
Once you cross it, you generally have 21 days to register.
Here is the expensive version of this story: you quoted a bunch of jobs three months ago, none of those quotes mentioned GST, and registration takes effect while you are still delivering them. The GST on those jobs now comes out of your pocket, not the customer's.
Two habits that prevent it:
✅ Check your rolling 12-month turnover once a quarter — ten minutes, four times a year
✅ Add one line to your quotes: "GST may be added if registration becomes required"
And if you drive rideshare — Uber and similar — the threshold does not apply to you at all. You must register from the very first fare, no matter how little you earn. That one catches a lot of weekend drivers.
Not sure whether you have crossed the line already? It is always cheaper to find out before the next BAS than after.
General information only, not tax advice. Current thresholds as published by the ATO.
Contact us today for a free 15mins consultation!
🔗 https://calendly.com/smlconsulting18/15-mins-quick-intro-call?utm_source=facebook&utm_medium=social&utm_campaign=ks001
SML Bookkeeping & Tax
Certified Practising Accountants | Public Practice Firm
🔹 Tax Compliance & Strategic Planning 🔹 Professional Bookkeeping Services
📞 (03) 9191 3731 | 📱 0433 408 886