If you’re a business owner, investor, contractor, or sole trader earning income outside of wages, chances are you’ve come across the term PAYG instalments. But what exactly are they, and how do they affect your tax obligations?
In this article, we break down everything you need to know about PAYG instalments—how they work, who needs to pay them, and how to stay on top of your obligations.
What Are PAYG Instalments?
PAYG (Pay As You Go) instalments are a system set up by the Australian Taxation Office (ATO) to help individuals and businesses prepay their expected tax throughout the year.
Instead of paying your tax in one lump sum at the end of the financial year, you make smaller, scheduled payments based on your income. This helps manage your cash flow and avoids any nasty surprises come tax time.
Who Needs to Pay PAYG Instalments?
You may need to start paying PAYG instalments if you:
• Are a sole trader, contractor, or freelancer
• Run a small business
• Receive investment income (like interest, dividends, or rent)
• Made a significant amount of income in the previous year and had to pay a large tax bill
The ATO usually notifies you via letter or through your myGov account when it’s time to start making PAYG instalments.

How Are Instalments Calculated?
There are two main ways PAYG instalments can be calculated:
1. Instalment Amount Method – The ATO provides a fixed dollar amount for each quarter, based on your previous tax return.
2. Instalment Rate Method – You report your actual income for the quarter and apply a percentage rate provided by the ATO to calculate your instalment.
Tip: If your income fluctuates, the rate method may be more accurate and flexible.
When Do You Pay?
PAYG instalments are generally paid quarterly, with due dates:
• 28 October (for July–September)
• 28 February (for October–December)
• 28 April (for January–March)
• 28 July (for April–June)
If your instalments are small, the ATO may let you pay annually instead.
Can You Vary or Opt Out?
Yes, if you expect your income to be lower than the previous year, you can vary your PAYG instalments. But be cautious: if you vary too low and underpay, you may be hit with interest or penalties.
You can also opt out if you no longer meet the PAYG requirements—but only with ATO approval.
Why PAYG Instalments Matter
PAYG instalments aren’t an extra tax—they’re just a way of prepaying your tax so that you don’t end up with a large bill at the end of the financial year. Staying on top of them means:
• Smoother cash flow
• Less stress at tax time
• Reduced risk of interest and penalties

Need Help Managing PAYG?
If you’re unsure whether you should be paying PAYG instalments—or you’ve received a letter from the ATO and aren’t sure what to do next—we’re here to help.
Our team can review your situation, explain your options, and make sure you’re on track with your obligations (without overpaying). Get in touch with Accountant Helpdesk Pty Ltd today to book a quick consultation.