Could the ATO Soon Calculate Your Tax Instalments from What Is Happening in Your Business Right Now?
- Future Accounting
- 2 days ago
- 4 min read
Written by: Melissa Cunliffe (CA)
What if your PAYG instalments reflected what your business is earning today - instead of what it earned last year?
For Australian small and family businesses, that could become a reality from 1 July 2027.
The Australian Taxation Office is developing Dynamic PAYG Instalments, or Dynamic PAYGI. The idea is to allow participating accounting software to use current business-performance data to calculate a more responsive PAYG instalment rather than relying mainly on historical tax outcomes.
For a business experiencing changing conditions, that could materially improve cash-flow timing. But there is an equally important message: if tax calculations increasingly depend on data flowing from the accounting system, the quality and timeliness of that data becomes critical.
At 3P's Future Accounting, we see this as part of a broader shift. Accurate financial information is no longer only about getting the BAS and tax return right. It increasingly affects when tax is paid, how much working capital stays in the business and how quickly management can respond when conditions change.
How PAYG instalments work now
PAYG instalments are prepayments toward the income tax expected to arise on business and investment income. Historical information works reasonably well when profitability is stable, but businesses are rarely perfectly stable.
a major customer is lost
margins tighten
wages increase
the business invests heavily
sales decline
interest costs increase
expansion temporarily reduces profitability
A business may therefore continue paying instalments influenced by a stronger prior year unless the amount is varied. Dynamic PAYGI is intended to make the system more responsive to what is happening now.
What is Dynamic PAYGI?
The ATO is working with digital service providers on the ability to embed a dynamic PAYG instalment calculation into accounting software. The ATO has already piloted the concept and has highlighted both the cash-flow opportunity and the importance of data quality. Broader software-provider adoption is targeted from July 2027, subject to pilot and consultation outcomes.
Monthly PAYG instalments are also proposed
The Government has also proposed allowing businesses to opt into monthly PAYG instalment reporting and payment from 1 July 2027, while taxpayers with a history of non-compliance may be required to report monthly. Importantly, the ATO currently states that the monthly opt-in proposal is not yet law.
Why could this improve cash flow?
How tax instalments could affect your cash flow?
Imagine a business that historically earns $600,000 taxable profit a year but now expects only $300,000. If PAYG instalments continue to reflect the stronger year, cash can leave the business well before the final tax liability is known. A more responsive instalment system could reduce that mismatch.
But the same system works in reverse
If profits rise sharply, instalments may increase sooner. That can feel less attractive, but it also reduces the risk of a large tax bill later. Good tax planning is not about delaying every dollar of tax; it is about reserving the right amount while keeping sufficient working capital available.
The biggest catch: the accounting data must be right
bank accounts are unreconciled
expenses are missing
stock is materially wrong
transactions are duplicated
bad debts remain in debtors
private transactions are mixed through the business
asset purchases are incorrectly expensed
loan principal is treated as an expense
bookkeeping is months behind
A fast calculation from bad data is still a bad calculation.
That is why your accounting system should be a management tool - not just somewhere transactions go before the BAS is due.
Better accounts should mean better decisions
Are sales actually growing?
Is gross margin improving or declining?
How quickly are customers paying?
Are wages increasing faster than revenue?
How much cash are we generating?
Can we afford another employee or equipment purchase?
What tax should we be putting aside?
The same information that supports better tax instalments should also support better management decisions.
The 3P's Future Prosperity Model
PRESERVE
Preserve working capital. Avoid paying materially more than necessary too early, but do not mistake tax money for free operating cash.
PROTECT
Protect cash flow by ensuring tax payments reflect current performance and by recognising tax obligations before cash is accidentally spent.
PROSPER
Use current financial information to make better decisions on hiring, pricing, borrowing, investment and growth.
What should businesses do now?
Are our accounts reconciled every month?
Do we know our actual monthly profit?
Do we know our gross margin?
Are debtors, creditors and stock accurate?
Could we confidently make a major business decision from the numbers in our accounting system today?
There is no need to change PAYG arrangements simply because Dynamic PAYGI is being developed. Use the lead time to improve the underlying financial system.
The 3P's view
Dynamic PAYGI may make tax instalments more responsive, but the bigger story is what it says about the future of business accounting: real-time information, more automation and faster decisions. Preserve your working capital. Protect your cash. Prosper through better information.
Book a consultation with our team to review your current financial position, improve the quality of your accounting data and prepare your business for what’s ahead.
Disclaimer
This article does not constitute financial advice and is for general information only. It does not take into account any individual’s personal objectives, situation or needs, and is not intended as professional advice. Any similarity to an individual’s personal circumstances and the examples provided in this article is purely coincidental. Any person acting upon such information without receiving specific advice, does so entirely at their own risk.
Authorisation under an Australian Financial Services Licence (AFSL) is not required in the provision of this article and the author plus Future Accounting Group Pty Ltd is not acting in its capacity as an Australian Financial Services Licence holder
Liability limited by a scheme approved under professional standards legislation.
