Direct Debit Calculator

1. Start with the total amount you owe
2. If choosing fortnightly repayments, the penalty rate is 5% divided by 26
3. If choosing weekly repayments, the penalty rate is 5% divided by 52
4. Round up both figures to the nearest dollar
5. To work out how much your weekly or fortnightly repayments are you will need to work out how many weeks are left in the financial year according to the following rules
   1. The financial week starts on a Friday
   2. If submitting Monday or Tuesday before the upcoming Friday, it is the current Friday
   3. If submitting Wednesday, Thursday or Friday, it is the next Friday
   4. If fortnightly the first fortnight starts on 4/07/2025 which is 26 repayments left, then 18/07/2025 is 25 repayments, etc

For example, if your total amount is $2500
If today's date is Friday 22nd of August 2025, next weekly date is next Friday, 29th August 2025, and the next fortnightly date is 15th of September 2025
Your weekly repayments are $59 and there are 44 repayments left with the total amount repayable being $2576
Your fortnightly repayments are $112 and there are 23 repayments left with the total amount repayable being $2596

How many weeks/fortnights are left

The "W" column is how many weeks you divide by if paying by weekly installments.

The "F" column is how many fortnights you divide by if paying by fortnightly installments.