Pre-judgment
Uses the Pre rate % column from the workbook for each period.
Days are counted inclusively for each overlapping rate period.
Formula: amount × rate × days ÷ 365.
NSW Interest Calculator
Enter the amount, select the interest type, and choose the start and end dates. This calculator mirrors the uploaded Excel workbook and applies simple interest across each NSW rate period.
Post-judgment
Uses the Post rate % column from the workbook for each period.
The rate can differ from the pre-judgment rate in later periods.
Formula: amount × rate × days ÷ 365.