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 is the interest earned on money that has already earned interest. Compound interest helps your money grow faster, with no additional investment on your part. Many or all of the ...

Elvis Picardo is a regular contributor to Investopedia and has 25+ years of experience as a portfolio manager with diverse capital markets experience. Suzanne is a content marketer, writer, and ...

Compound interest is commonly described as "interest earned on interest." Compound interest can work to your advantage as your investments grow over time, but against you if you're paying off debt, ...