How to calculate simple interest in Excel

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To calculate simple interest in Excel (i.e. interest that is not compounded), you can use a formula that multiples principal, rate, and term.

Case Study: This example assumes that $1000 is invested for 10 years at an annual interest rate of 5%. Simple interest means that interest payments are not compounded – the interest is applied to the principal only.

Formula

interest=principal*rate*term

Explanation

 

In the example shown, the formula in C8 is:

=C5*C7*C6

How this formula works

The general formula for simple interest is:

interest=principal*rate*term

So, using cell references, we have:

=C5*C7*C6
=1000*10*0.05
=500

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