While working with a client, we noticed their business wasgrowing.
They weren't registered for GST, and their GST turnover was around $71,000 — close to the $75,000 registrationthreshold.
We could have simply recorded what the business had earned andmoved on.
Instead, we asked:
“What do you expect your turnover to look like over the next 12months?”
The client expected the business to continue growing.
That mattered because GST registration isn't determined simply bywaiting for historical turnover to physically pass $75,000. The GST turnovertests consider both what has happened and, importantly, the business's projectedGST turnover.
We looked forward, not just backward
For most businesses, the compulsory GST registration threshold is $75,000.
Broadly, current GST turnover looks at the current month andprevious 11 months, while projected GST turnover looks at the current month andnext 11 months, subject to the specific inclusions and exclusions under the GSTrules.
So a growing business sitting at approximately $71,000 shouldn'tnecessarily think:
“I'm under $75,000, so GST isn't something I need to worry aboutyet.”
We discussed where the client's turnover was heading and whetherthe projected GST turnover test could require registration.
That gave the client an opportunity to deal with GST proactivelyrather than discovering the obligation after the event.
Missing registration can become expensive
If a business becomes required to register for GST but continuesmaking taxable sales without properly allowing for GST, not charging a separateGST amount doesn't necessarily make the liability disappear.
The business can potentially become liable for GST on taxablesales from the date it should have been registered.
By the time the problem is discovered, going back to customers andcollecting additional money may be difficult or commercially impractical.
For example, suppose the business subsequently made $110,000of taxable sales withoutallowing for GST in its pricing.
If those amounts were effectively treated as GST-inclusive, theGST component could be approximately $10,000.
That could mean thousands of dollars coming out of money thebusiness had already received — and potentially already spent.
The longer the problem continued, the larger the exposure couldbecome.
Growth can change your tax obligations
There wasn't an ATO audit or an existing GST problem to fix.
The value was identifying the issue beforeit became one.
Because the client's business was approaching the threshold andexpected to continue growing, we could consider the registration requirementsand prepare for the potential impact on pricing, invoicing, bookkeeping, BASobligations and cash flow.
The client's business hadn't done anything wrong.
It had simply grown to the point where the tax obligations neededto grow with it.
A $71,000 turnover figure isn't necessarily just a number in theaccounts.
It can be a reason to ask:
“Whathappens next?”
This case study has been generalised and certain details have beenchanged to protect client and business confidentiality. General informationonly. GST registration requirements depend on the nature of the enterprise andthe current and projected GST turnover tests, including applicable inclusionsand exclusions. The general compulsory registration threshold is $75,000 forbusinesses and $150,000 for non-profit organisations, with differentrequirements applying in some circumstances.
Stay Ahead with Business & Tax Insights
Receive practical business insights, taxation updates and strategic guidance delivered directly to your inbox. Stay informed about legislative changes, emerging opportunities and practical strategies to help you structure, grow and protect your business.

More real-world examples
Explore other situations where a closer look at the numbers, structure or timing helped uncover an opportunity or identify a potential issue.



