What is Simple Interest?

Simple interest is a quick and straightforward method of calculating the interest charge on a loan or the return on an investment. Unlike compound interest, where you earn interest on previously accumulated interest, simple interest is calculated solely on the original principal amount.

The Simple Interest Formula

Our calculator uses the standard financial formula to determine your costs:

A = P (1 + rt)

Where:
A = Total Accrued Amount (Principal + Interest)
P = Principal Amount
I = Interest Amount
r = Annual Interest Rate (in decimal form)
t = Time Period (in years)

When is Simple Interest Used?

In the financial world, simple interest is most commonly utilized for short-term personal loans, auto loans, and certain types of short-term business capital. Mortgages and credit cards, on the other hand, typically rely on complex compound interest models.