• Varying your instalment amount

    To vary your GST instalment amount, you must complete the section on the back of the instalment notice.

    Use steps 1 to 6 below to work out what you need to do.

    Step 1: Estimate your net GST liability

    Estimate your net GST liability for the year and write this amount at G22 on the back of the instalment notice.

    If you have wine equalisation tax or luxury car tax liabilities, take these into account when working out your net GST for the year.

    Step 2: Calculate your varied instalment amount

    Work out your varied instalment amount for the quarter. The calculation method differs for:

    Attention

    When working out your varied instalment amount, deduct previous quarter instalments whether paid or not. If you previously varied your instalment amount, then use the varied amount.

    End of attention

    Quarterly instalment payers

    Use Table 1 if you pay quarterly GST instalments.

    Table 1: Calculating your varied instalment – quarterly instalment payers

    This quarter is:

    Your GST varied amount (G23) is:

    the 1st in the income year for which you elected to pay GST by instalments

    25% of your estimated annual GST liability

    your 2nd for the income year

    50% of your estimated annual GST liability less the amount of your 1st quarter instalment

    your 3rd for the income year

    75% of your estimated annual GST liability less the amount of your 1st and 2nd quarter instalments

    your 4th for the income year

    100% of your estimated annual GST liability less the amount of your 1st, 2nd and 3rd quarter instalments

    Two instalment payers

    Use Table 2 if you are eligible to pay two GST instalments per year.

    Attention

    Two instalments applies to some primary producers and special professionals. You will have been advised if this applies to you.

    End of attention

    Table 2: Calculating your varied instalment – two instalment payers

    This quarter is:

    Your GST varied amount (G23) is:

    your 3rd for the income year

    75% of your estimated annual GST liability

    your 4th for the income year

    100% of your estimated annual GST liability less the amount of your 3rd quarter instalment

    Step 3: Write your varied instalment at G23

    If the amount you worked out in step 2 is positive, write the amount at G23. If the amount is zero or negative write '0' at G23.

    Attention

    You cannot vary your GST instalment amount below zero. Any overpayment of GST instalments will be credited to you when your annual GST return is processed.

    End of attention

    Step 4: Choose a reason code

    Choose a reason for varying your instalment amount from the codes (table 2) on the back of your instalment notice and write the reason code at G24.

    Attention

    Do not leave G24 blank.

    End of attention

    Step 5: Transfer the amount to label 9

    Transfer the G23 amount to label 9. This is the total varied amount you are required to pay.

    Step 6: Lodge and pay

    Complete and lodge your instalment notice and pay any amount due. You must:

    • fill in the Contact phone number and Person who completed the form and sign and date the declaration
    • lodge the instalment notice using the envelope provided by the date shown in the Form due on section at the front of the instalment notice
    • pay any amount due and make sure you  
      • complete the Amount paid section on the payment advice
      • pay your instalment using one of the options from the How to pay section on either the front or back of the section on either the front or back of the instalment notice, and
      • pay the amount by the date shown in the Payment due on section at the front of the instalment notice.
    Attention

    If you are unable to pay the varied amount by the due date you still need to lodge the instalment notice.

    End of attention

    Get it done

    You can use the Payment arrangement calculator to determine how quickly you can pay off your tax debt.

    End of get it done
      Last modified: 24 May 2014QC 17323