Interest is the amount of money you must pay to borrow money in addition to the loan's principal. It's also the amount you are paid over time when you deposit money in a savings account or certificate ...

Compound interest can help turbocharge your savings and investments, or it can quickly lead to an unruly balance, keeping you stuck in a cycle of debt. Its magic can help you earn more — or owe more.

Compound interest is one of the great powers of the financial world. Compound interest can help a 20-year-old become a multimillionaire by retirement age without having to save millions. Whether you ...