Formula to calculate compound interest on increasing principal

[Moreden]

Hi folks,
Would appreciate some help in locating a formula to calculate compound
interest on an increasing principal.
Many thanks

 

[Bernie Deitrick]

Moreden,

If you add to the principal at a constant rate, and the interest rate
doesn't change, then simple use the FV function. Otherwise, you need to use
a stepwise method, using a table of variable inputs to FV at every change in
rate or principal addition.

HTH,
Bernie
MS Excel MVP