Interest can be charged when you borrow money or earned when you save. When you charge something on a credit card or take out a loan from a financial institution (student loan, auto loan, mortgage, ...

Will Kenton is an expert on the economy and investing laws and regulations. He previously held senior editorial roles at Investopedia and Kapitall Wire and holds a MA in Economics from The New School ...

Most people understand interest in theory—you borrow money, you pay a little extra back over time. But what gets overlooked is how that “little extra” quietly shapes your entire financial picture.