For educational purposes only. Not tax, legal, or financial advice. Tax laws change frequently. Consult a registered tax agent or CPA for your specific situation.

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    TaxKiln Australia

    PAYG instalment estimator

    Quarterly Pay-As-You-Go instalments under TAA 1953 Sch 1. Compare the ATO-calculated amount (Option 1) with the rate-times-actual-income method (Option 2) and see the full due date schedule.

    Inputs

    Schedule

    Notional tax (income tax + Medicare)
    $29,188.00
    Instalment rate (T2)
    24.3%
    Quarterly instalment
    $7,297.00
    QuarterDueAmount
    Q1 (Jul–Sep 2025)28 Oct 2025$7,297.00
    Q2 (Oct–Dec 2025)28 Feb 2026$7,297.00
    Q3 (Jan–Mar 2026)28 Apr 2026$7,297.00
    Q4 (Apr–Jun 2026)28 Jul 2026$7,297.00
    • Quarterly due dates are 28 days after each quarter end. December quarter has an extended 28 February deadline.
    • Option 1 (T7 amount): same dollar instalment each quarter; vary at T8/T9 if income changes materially.

    Frequently asked questions

    What is PAYG instalments?+
    Pay As You Go instalments is a system requiring individuals and entities with business or investment income to prepay their expected income tax in quarterly instalments throughout the year. The ATO enters you into PAYG automatically once your most recent notional tax exceeds the threshold.
    When are PAYG instalments due?+
    Quarterly, 28 days after each quarter end. Q1 (Jul–Sep) is due 28 October. Q2 (Oct–Dec) gets the extended 28 February deadline. Q3 (Jan–Mar) is due 28 April. Q4 (Apr–Jun) is due 28 July.
    Should I use the instalment amount or rate?+
    Use the amount (Option 1) for stable income — same payment each quarter, with the option to vary at T8/T9 if your forecast changes. Use the rate (Option 2) for volatile income — the rate is applied to actual quarterly income so it self-adjusts.

    Not tax advice. Estimates based on the Taxation Administration Act 1953 Schedule 1, Part 2-10. Does not model variations (T8/T9), general interest charge on underpayments, primary producer averaging or two-instalment options. For PAYG advice consult a registered tax agent.