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 ...

On the surface, an interest rate is just a number. How that number applies to debt or equity opens up a world of possibilities. The first consideration is always whether it’s simple interest vs.

Simple interest calculates earnings or payments based solely on the initial principal, while compound interest grows by calculating interest on both the principal and the accumulated interest over ...

Daniel Jassy, CFA, is an Investopedia Academy instructor and the founder of SPYderCRusher Research. He contributes to Excel and Algorithmic Trading. Compound interest is interest that's calculated on ...

While some might argue that compound interest is the most powerful force in the universe, it is undoubtedly one of the most powerful financial forces on Earth. Understanding how compound interest ...

This is an excerpt from Dollar Scholar, the Money newsletter where managing editor Julia Glum teaches you the modern money ...