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See how your money grows over time with the power of compounding
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Compound interest is interest calculated on both the initial principal and the accumulated interest from previous periods. Unlike simple interest, which is calculated only on the principal, compound interest grows exponentially over time — making it one of the most powerful forces in personal finance.
When your interest compounds monthly, you earn interest on your interest every month. Over time, this creates a snowball effect where your money grows faster and faster. The longer you leave your money invested, the more dramatic the effect of compounding becomes.
Time is the most important factor in compound interest. Starting to invest just 5 years earlier can result in significantly more wealth at retirement. Even small monthly contributions, invested consistently over decades, can grow into substantial savings thanks to compounding.
Savings accounts, money market accounts, certificates of deposit (CDs), and investment accounts all use compound interest. Index funds and ETFs reinvest dividends automatically, providing compounding growth over time. The key is to start early and stay consistent.