PAYG Instalment Variation Planner
Compare your current ATO instalment rate with a proposed variation before changing a BAS or instalment notice.
Your best full-year estimate, not total income tax from salary.
Awaiting input
Enter the ATO rate, proposed rate and expected annual tax.
What this estimate includes
- Compares the original and varied rate methods on the same period income.
- Projects annual and remaining-period payments.
- Shows the numerical shortfall against the 85% comparison amount.
Frequently asked questions
What are PAYG instalments?
They are prepayments toward expected tax on business and investment income, credited when your annual income tax return is assessed.
Can I vary my PAYG instalment rate?
Yes, when the ATO rate or amount no longer reflects expected tax. Your estimate should be reasonable and supported by current records.
What is the 85% PAYG variation rule?
If varied instalments are less than 85% of the actual tax payable on instalment income, general interest charge or penalties may apply.
Tax Accuracy & Sources
Reviewed: 28 July 2026 · Tax year: Current ATO PAYG instalment rules
Planning comparison only. It assumes constant instalment income across periods and does not complete a BAS, calculate annual income tax or determine whether the ATO will impose interest or penalties.
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