For the purpose of this calculation, we consider an initial investment amount, regular contributions, an annual interest rate, and a specified investment horizon. The interest income compounds according to the selected compounding frequency, with additional contributions applied at the end of each chosen period.

Results are displayed for each compounding period, taking into account contribution frequencies that exceed the compounding period. For instance, if you make weekly contributions with monthly compounding, the calculations distribute the annual contributions evenly over the 12 months, each consisting of approximately 4.33 weeks.