Amy Fontinelle is a freelance writer, researcher and editor who brings a journalistic approach to personal finance content. Since 2004, she has worked with lenders, real estate agents, consultants, ...

Principal is the amount you borrow and interest is the added charge you pay to borrow it. The interest rate determines the total cost of a loan and how long it will take to pay off the principal. Many ...

Understanding compound interest can be simple with the right tools and knowledge. A compound interest calculator is a valuable tool for estimating how an investment grows over time. Once a person ...