An interest calculator is a program that allows you to calculate tax, statutory and contractual interest; interest on a single amount; interest on several amounts in total (instalments) that have different payment dates but one payment date;

interest on installment payments; settlement of the amount paid as part of the arrears with interest due; checking that tables of interest on tax arrears or statutory interest have not changed;

displaying and printing a detailed breakdown of the calculated interest. It can be printed and exported to RTF format.