COMPOUND INTEREST
Back to GlossaryDefinition
Interest calculated on the initial principle which also includes all accumulated interest from previous periods on a deposit or loan.
Summary
Compound interest is the 'interest on interest' effect where your money grows exponentially over time. Unlike simple interest which only calculates earnings on your original amount, compound interest calculates earnings on both your original principal AND all the interest you've already earned. This creates a snowball effect where your money grows faster and faster over time, making it one of the most powerful concepts in personal finance and investing.
Usage Context
Understanding compound interest is crucial when studying investment strategies, loan analysis, retirement planning, and any time value of money calculations. It's fundamental to making informed financial decisions about savings accounts, investment portfolios, mortgages, and credit cards.
Common Confusions
- Thinking compound interest and simple interest produce similar results over short periods
- Not understanding that compound interest can work against you with debt
- Confusing the principal amount with the total accumulated amount
- Believing that higher compounding frequency always means significantly more money
- Not realizing that time is the most important factor in compound interest calculations
