Hello I am trying to work out the impact of charges on a savings scheme, assuming the growth rate is 7% PA before deduction I would like to work out the flat 7% return and the effect in percentage terms that the reduction on that 7% yield based on a number of ongoing charges that the scheme attracts:

Parameters:

10 years saving with monthly contributions at 100 per month
first 12 months see 25% of each contribution lost in set up fees
ongoing annual charge of the accumulated funds of 0.5% PA


Any pointers would be greatly appreciated.


Thanks D