Starting 1 April 2025, around 3,500 small businesses will be moved from quarterly to monthly GST reporting — not by choice, but by directive.
What’s changing?
The ATO will begin notifying selected small businesses (and their tax agents) that their GST reporting cycle is being forcibly changed from quarterly to monthly.
The new cycle will apply for a minimum of 12 months, with the intention of:
Increasing visibility over business activity
Improving cash flow transparency
Ensuring more timely correction of reporting errors or omissions
Why the ATO is doing this
The ATO has long flagged that a subset of small businesses consistently fall short on BAS obligations — either by failing to lodge on time, misreporting, or underpaying. For these cases, quarterly reporting gives too much leeway and too little oversight.
By shifting non-compliant businesses to monthly reporting, the ATO:
Gets more real-time data on business income and GST liabilities
Can identify issues sooner, reducing the scale of errors or evasion
Applies behavioural pressure to improve overall compliance
What tax practitioners should do
If representing small business clients with patchy BAS histories, now is the time to:
Also important: consider whether a GST refund cycle may be affected. Monthly refunds may be faster — but monthly scrutiny is also more likely.

Not all small businesses are affected
To clarify: this change only applies to a targeted group based on compliance history. Most small businesses will remain on quarterly reporting by default.
Final Thoughts
This move fits within the ATO’s broader push for data-driven, behaviour-based regulation. It’s not about penalising small business — it’s about making non-compliance too inconvenient to continue.
