When you borrow money, you’ll also pay interest on top of the amount you borrowed.. Interest is the money the lender gets for loaning you the money. Read Next: 5 Subtly Genius Moves All Wealthy People ...

Learn the impact of nominal, real, and effective interest rates on investors and borrowers, including inflation's role and the cost of compounding.

Don't let flashy low rates fool you. To find a loan's true cost, calculate the Effective Interest Rate (APR), which includes compounding frequency and hidden fees. This ensures a fair comparison.