PAYG Instalments: Which Method Should You Choose This September?
PAYG Instalments: Which Method Should You Choose This September?
Many business owners will shortly receive their September 2026 Activity Statements and be asked to choose a PAYG instalment method.
PAYG instalments commonly apply to individuals, sole traders, primary producers, trusts and companies that earn business or investment income. Rather than paying all of their tax after lodging a tax return, affected taxpayers make instalment payments throughout the year towards their expected income tax liability.
While PAYG instalments do not change the total amount of tax ultimately payable, selecting the most suitable method can help manage cash flow and avoid unexpected tax bills.
For most taxpayers, the July to September quarter is the first PAYG instalment quarter of the financial year. If your Activity Statement outlines both methods, you generally need to lodge your Activity Statement and make your choice on or before the due date, and that election will usually apply for the balance of the income year.
The Two Methods
Option 1: Instalment Amount Method
The ATO issues a fixed instalment amount based largely on your most recent tax return, which has been adjusted for expected growth by the GDP of 5% for the 2026–27 income year.
This approach may suit businesses with relatively stable income and profits, or those who prefer predictable quarterly payments.
Option 2: Instalment Rate Method
Under this method, you multiply your ATO-issued instalment rate by your instalment income for the quarter.
This usually comprises gross assessable business and investment income derived during the period, excluding GST. It is not the same as accounting profit or taxable income, and particular exclusions or adjustments may apply.
For example, if your instalment income is $150,000 and the ATO-issued rate shown at T2 on your activity statement is 4%, your PAYG instalment would be $6,000
This method is often more suitable where income is seasonal, fluctuating or significantly different from the prior year.
Which Option Is Best?
When choosing a method, consider:
- Whether income is higher or lower than last year
- Seasonal fluctuations in revenue
- Changes in profitability or operating costs
- Significant capital purchases or deductions
- Changes in business structure or investments
- Cash flow preferences and payment predictability
The instalment amount method can overestimate tax if your latest tax return reflected an unusually strong year. Conversely, the rate method may result in larger instalments during high-income quarters.
Can You Vary an Instalment?
If expected tax is materially different from the ATO calculation, it may be possible to vary the instalment amount or rate. A variation must generally be made by the instalment due date and applies to the remaining instalments for the income year unless varied again.
A downward variation should be based on a reasonable estimate. If your varied instalments are less than 85% of the tax ultimately payable on your instalment income, you may have to pay general interest charge in addition to the outstanding tax. Penalties may also apply in some circumstances.
Special Considerations for Primary Producers
Eligible primary producers may be able to pay PAYG instalments twice a year using the instalment amount method:
- 75% of the annual amount due in April, and
- the remaining balance due in July.
Eligible farmers can instead change to quarterly payments by choosing the instalment rate method by the first instalment due date.
Need Help?
Before lodging your September quarter Activity Statement, contact us if your income, margins, seasonal conditions or business structure have changed. We can review your PAYG options, assess whether a variation is appropriate and ensure any available concessions are taken into account.
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