=Principal * (Annual_Rate/100) * (Days_Overdue/365) This complies with typical legal frameworks and is easy to implement in a template. =MAX(0, Payment_Cell - Due_Date_Cell) ' Days overdue =Principal_Cell * (Rate_Cell/100) * (Days_Overdue_Cell/365) ' Interest amount Attachments: Sample Excel file (template.xlsx) available upon request. End of report

For compound interest (if legally allowed and specified in contract), apply the formula iteratively per period (e.g., monthly). 4.1 Required Columns in Excel | A | B | C | D | E | F | |---|---|---|---|---|---| | Due Date | Principal (DKK) | Annual Rate (%) | Payment Date | Days Overdue | Interest (DKK) | 4.2 Formulas Days Overdue (Column E):

[ \textInterest = \textPrincipal \times \frac\textAnnual Interest Rate100 \times \frac\textNumber of Days Overdue365 ]

Implementation of Interest Calculation Formulas in Excel for Overdue Rent (Renters Rente)

=MAX(0, D2 - A2) (Assuming D2 is payment date, A2 is due date. If no payment made, use today's date: =MAX(0, TODAY() - A2) )