The Interest module is used for calculating real or revaluation interest from any account card. You can also do it by directly entering a principal. This can be legal interest on arrears or custom contractual interest.

In the Interest to Suppliersand Interest from Customers windows there is provided a history and verification of interest calculations for a specific document. Approving an interest calculation marks the involved documents, preventing them to be offered for further interest calculations, and so they cannot be multiplied. There is no interest calculation history available in the menu for calculating custom interest and documents are not marked if they were already included in a calculation.

The control of the interest calculation by the amount of principal is not integrated in the program due to the resolution on partial annulment of the Article 1060 of the Code of Obligations (Official Gazzette of the  RS 28/2006), dating March 17th, 2006.

	Claims and liabilities are remunerated from the due date to the date of payment, excluding the first day (due date). Decursive interest calculation is used.
	Interest can be calculated in two ways: compound calculation and conform interest calculation (see Conform Interest Calculation - Example) or nominal interest rate and proportional interest calculation (see Proportional Interest Calculation - Example).

The Interest Rates register must be defined in order to calculate interest, as they are used for interest calculation and basic interest rate calculation. In Interest Rates register you can select whether interest will be calculated according to the conform or proportional method.

Interest can be calculated in the following ways:

• Custom calculation, where interest for any principal can be calculated, and the principal can be altered during the remuneration period,
• Interest to suppliers, including  a history and summary of interest calculations,
• Interest from customers including a history and summary of interest calculations,
• Debt collection - Create documents.