I am trying to calculate interest for an amount that has different interest rates for each year. The interest does not compound, rather just computes on the original amount.
E.g. I have an amount of $1000.00 paid on 1/31/2016, but was due on 1/31/12. Interest rates were 3%, 3%, 3%, 3%, and 4% for 2012-2016 respectively.
The formula I need to create is to count the number of days in each year for which the payment was late and multiply those days by the daily interest rate. So in this scenario, 1827 days total (which I can calculate easily). I need to be able to calculate 336 days for 2012, 365 days for 2013, etc.
In this scenario, I can do it by hand and get $24.02 in interest.
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