Calculate Court Interest for any Australian Jurisdiction

Court Interest Calculator

This complimentary calculator calculates interest using the current interest rate in each jurisdiction.

You will need Calin - Lawyer's Interest Calculator in these other situations:

  • Period involves past interest rates.
  • You need particulars of calculation for court pleadings.
  • You need to print details of the calculation.
  • Other interest rates - eg bank rates.
  • Take leap years into account.
  • Compound & periodic interest - for example the Federal Tax Interest Rates usually need compounding.
  • Data input validation.

Caution - check interest rates carefully, ensure compounding not applicable, and please advise us if the rates on this page are out of date!

  Day Month   Year Include?
First Day  
Last Day  
  Interest Rate
  Rate Started

Calin's list of supported Australian interest rates and their oldest and newest rate changes.

No.NameStartedLast Change
1Qld Magistrates Ct Pre-J 25-Feb-1993 01-Jul-2022
2WA Sup Ct Pre-J 28-Jun-1991 11-Sep-1997
3Qld Supreme Ct Pre-J 25-Feb-1993 01-Jul-2022
4Qld District Ct Pre-J 25-Feb-1993 01-Jul-2022
5NSW Supreme Ct Post-J 01-Jul-1972 01-Jul-2022
6ATO General Interest Charge 01-Jul-1992 01-Jul-2022
7ATO Late Payment 01-Jul-1992 01-Jul-1999
8Family Law Act Post-J 08-May-1987 01-Jul-2022
9Federal Court Post-J 01-Aug-1979 01-Jul-2022
10SA Magistrates Ct Post-J 06-Jul-1992 20-May-2020
11WA Magistrates Ct Pre-J 28-Jun-1991 11-Sep-1997
12WA District Ct Pre-J 28-Jun-1991 11-Sep-1997
13NSW District Ct Pre-J 01-Jul-1972 01-Jul-2022
14NSW Local Ct Pre-J 01-Jul-1972 01-Jul-2022
15NSW Supreme Ct Pre-J 01-Jul-1972 01-Jul-2022
16NSW District Ct Post-J 01-Jul-1972 01-Jul-2022
17NSW Local Ct Post-J 01-Jul-1972 01-Jul-2022
18Vic Magistrates Ct Pre-J 01-Jul-1983 01-Feb-2017
19Vic Magistrates Ct Post-J 01-Jul-1983 01-Feb-2017
20Vic County Ct Pre-J 01-Jul-1983 01-Feb-2017
21Vic County Ct Post-J 01-Jul-1983 01-Feb-2017
22Vic Supreme Ct Pre-J (PIRA) 01-Jul-1983 01-Feb-2017
23Vic Supreme Ct Post-J 01-Jul-1983 01-Feb-2017
24SA District Ct Post-J 04-Sep-2006 01-Jul-2022
25SA Magistrates Ct Pre-J 01-Jan-2000 01-Jan-2000
26SA Supreme Ct Post-J 01-Jan-1987 20-May-2020
27SA Supreme Ct Pre-J 01-Jul-2010 20-May-2020
28ACT Magistrates Ct Post-J 01-May-1986 01-Jul-2022
29ACT Supreme Ct Pre-J 01-Jan-1974 01-Jul-2022
30ACT Supreme Ct Post-J 01-Oct-1977 01-Jul-2022
31Tas Supreme Ct Pre-J 01-Jul-2010 01-Jul-2022
32Tas Supreme Ct Post-J 01-May-2000 01-Jul-2022
33NT Local Ct Post-J 01-Sep-1987 01-Jul-2022
34NT Supreme Ct Post-J 01-Sep-1987 01-Jul-2022
35Federal Ct Pre-J 01-Jan-1991 01-Jul-2022
36Fed Magistrates Ct Post-J 01-Aug-1979 01-Jul-2022
37WA District Ct Post-J 28-Jun-1991 11-Sep-1997
38WA Magistrates Ct Post-J 28-Jun-1991 11-Sep-1997
39WA Supreme Ct Post-J 28-Jun-1991 11-Sep-1997
40Qld Magistrates Ct Post-J 17-Dec-1983 01-Jul-2022
41Qld Supreme Ct Post-J 17-Dec-1983 01-Jul-2022
42Qld District Ct Post-J 17-Dec-1983 01-Jul-2022
43ACT Magistrates Ct Pre-J (<15-7-1992) 01-Jul-1981 10-Jan-2005
44ACT Magistrates Ct Pre-J (15/7/92-10/1/2005) 01-Jul-1981 10-Jan-2005
45ACT Magistrates Ct Pre-J Commenced after 9/1/2005 01-Jul-1981 01-Jul-2022
46RBA Cash Rate Target 02-Aug-1990 03-Aug-2022
47Vic Legal Profession Act 2004 08-Nov-2007 03-Aug-2022
48NSW Legal Profession Act 01-Oct-2005 03-Aug-2022
49ATO Shortfall Interest Charge 01-Apr-2005 01-Jul-2022
50ATO Base Rate of Interest 01-Jan-1971 01-Jul-2022
51ATO Div7A Benchmark Interest Rates 01-Jul-1998 01-Jul-2022
52NSW Pre-J (Using Sched 5 to 30/6/10 then CRT) 01-Jul-1972 01-Jul-2022
53ATO Interest on Early and Over Payments 01-Jan-1971 01-Jul-2022
54Qld Interest on Money Orders 01-Jul-1998 01-Jul-2022
55SA Supreme Ct Pre-J (UCR Only) 01-Jan-1980 01-Jan-1980

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