PAYG Instalment
A PAYG instalment is a regular prepayment towards the income tax you expect to owe on business or investment income.
PAYG means “pay as you go”. In Australia, PAYG instalments help taxpayers spread income tax across the year instead of waiting for one large bill after lodging a tax return.
You may see PAYG instalments if you run a business as a sole trader, company, trust or partnership, or if you earn investment income such as rent, dividends or interest. The Australian Taxation Office (ATO) can enter you into the system based on your latest tax return, or you may choose to enter voluntarily if you expect business or investment income.
Where PAYG instalments appear
PAYG instalments usually appear around tax reporting rather than payroll. You may see them in:
- Business Activity Statement (BAS) forms
- ATO instalment notices
- accountant or BAS agent emails about quarterly tax payments
- bookkeeping records for prepaid income tax or owner tax drawings
- cash flow forecasts and cash budgets
- year-end tax return workpapers, where instalments are credited against the final tax assessment
If your only obligation is PAYG instalments, the ATO may send an instalment notice instead of a full BAS. If you also report GST, PAYG withholding or other tax obligations, the instalment usually appears as part of your BAS.
How PAYG instalments work in practice
The ATO’s starting PAYG instalments guidance explains the basic cycle:
- You enter the PAYG instalments system.
- You make regular instalment payments during the year, often quarterly.
- When you lodge your tax return, those instalments are credited against the income tax you actually owe.
The amount can be handled in two common ways. The ATO may give you a set instalment amount to pay, or it may give you an instalment rate that you apply to your instalment income for the period. Instalment income generally means gross business and investment income, excluding GST.
If your expected tax changes during the year, you may be able to vary your instalment. The ATO’s PAYG instalment variation guidance explains how variations work and why you should take care not to underestimate.
Simple example
Noah runs a small electrical business. The ATO sends a quarterly BAS showing a PAYG instalment of $2,000.
Noah pays the instalment by the due date. In the accounts, the payment is tracked separately from normal business expenses because it is a prepayment towards income tax.
| Event | Amount | What it means |
|---|---|---|
| Quarterly PAYG instalment paid | $2,000 | Tax prepaid during the year |
| Four similar instalments | $8,000 | Total prepaid before the tax return |
| Final income tax for the year | $9,500 | Actual tax worked out after lodging |
| Amount still payable | $1,500 | Final tax less instalments already credited |
If the instalments had been higher than the final tax bill, the excess would generally be refunded or credited by the ATO after the tax return is assessed.
PAYG instalment versus PAYG withholding
These two terms are easy to mix up because they both start with PAYG, but they point in opposite directions.
| Term | Plain-English meaning | Common place you see it |
|---|---|---|
| PAYG instalment | Prepayment towards your own expected income tax | BAS, instalment notice, tax return |
| PAYG withholding | Tax held back from payments you make to someone else | Payroll, payslips, STP, BAS W labels |
For example, a sole trader might pay PAYG instalments for their own income tax. If that same sole trader employs staff, they may also need to withhold PAYG withholding from employee wages.
Why PAYG instalments matter
PAYG instalments matter because profitable businesses can be caught short if they treat income tax as a once-a-year surprise. Regular instalments make tax easier to plan for and help keep cash flow steadier.
They also matter for bookkeeping. A PAYG instalment is not the same as a supplier bill, GST payment or payroll tax amount. It needs to be recorded in a way that your accountant can match to the final tax return. For companies, that often means tracking prepaid income tax or income tax payable. For sole traders, income tax is personal, so the bookkeeping treatment may be different.
Easy way to remember it
PAYG instalments are your own tax paid early. PAYG withholding is someone else’s tax collected through your payments.
How Gimbla can help
Gimbla helps keep PAYG instalments visible beside the rest of your business records. You can record the payment from the business bank account, keep it separate from day-to-day expenses, and review it later with your accountant or BAS agent.
For the bookkeeping workflow, see the PAYG instalment posting guide. If your instalment appears on a BAS, Gimbla’s BAS lodgment workflow can also help keep GST, PAYG and activity statement records in one place.
Related terms
- PAYG withholding
- BAS - Business Activity Statement
- GST - Goods and Services Tax
- Cash budget
- Cash flow statement
- Accounts payable
Helpful Gimbla guides
In short
A PAYG instalment is a prepayment towards expected income tax on business or investment income. It helps spread tax across the year, but it still needs clean bookkeeping so the final tax return can match instalments paid against the actual tax bill.