Post Judgment Interest Calculator
From 1 July 2010, the basis for the calculation of post-judgment interest changed whereby interest is calculated by reference to the Reserve Bank of Australia Cash Rate plus 6%.
It should be noted that this post judgment calculator should be only be used for judgment debts after 1 July 2010 (when the new rules came into affect). For judgment debts before 1 July 2010, the old Schedule 5 Uniform Civil Procedures Rules rates should be used for the period from date of judgment to 1 July 2010. This calculator does not calculate using the old Schedule 5 rates.
We have developed a Post-Judgment Interest Calculator to make these detailed calculations easy for you to work out in a matter of seconds by completing the 3 key inputs below:
Help with the 3 key inputs above
Judgement DateDate of Judgment or the date from which interest accrues
Amount: This is the Australian dollar value amount of the judgment which is subject to the interest calculation.
How the Post-Judgment Interest Calculator works:
Interest is calculated using the following methodology contained in the NSW Courts Practice Notes being:
- in respect of the period from 1 January to 30 June in any year – the rate that is 6% above the cash rate last published by the Reserve Bank of Australia before that period commenced, and
- in respect of the period from 1 July to 31 December in any year – the rate that is 6% above the cash rate last published by the Reserve Bank of Australia before that period commenced
Post-judgment interest is calculated by reference to the Reserve Bank of Australia Cash Rate plus 6% calculated in six month periods. Interest is calculated on a simple basis (not compounding).
The Post-Judgment Interest Calculator has been updated to include the RBA Cash Rate up to 30 June 2025. Next Update: 1 July 2025