The simple interest formula is I = Prt. Many, or all, of the products featured on this page are from our advertising partners who compensate us when you take certain actions on our website or click to ...

Add Yahoo as a preferred source to see more of our stories on Google. Knowing your loan's interest rate matters, as does learning how that rate is calculated. Interest is either simple or compound. If ...

Simple interest is paid only on the principal, e.g., a $10,000 investment at 5% yields $500 annually. Compound interest accumulates on both principal and past interest, increasing total returns over ...