Compound Interest Calculator

Compound interest is the interest on a deposit or loan calculated based on both the initial principal and the accumulated interest from previous periods. Basically, you earn interest on your interest, which makes your money grow faster over time.

Compounding frequency is the number of times accumulated interest is added to your account principal each year. Common intervals include annually (1 time), quarterly (4 times), monthly (12 times), and daily (365 times). The more frequently your interest compounds, the faster your total balance grows over time.

Regular contributions create a powerful dual-growth engine. Adding fixed monthly deposits alongside your initial principal gives the compounding formula a continuously growing base. Our compound interest calculator allows you to input recurring deposits to visualize how small, habitual savings drastically alter your long-term wealth trajectory.

Yes, inflation reduces your future purchasing power. While your calculator shows the nominal balance, your actual purchasing power depends on the inflation rate. To calculate your real rate of return, subtract the estimated annual inflation rate from your expected annual interest rate before entering it into the calculator.

The more frequently interest is compounded, the higher your total returns will be. For example, monthly compounding will yield slightly more than annual compounding because your interest is added to your balance more often, giving it more time to grow.

Time is the most important factor in compound interest. Because your gains generate their own gains, even small amounts invested early can grow to be much larger than bigger amounts invested later in life.

This calculator provides a mathematical estimate based on the fixed return rate you provide. Real-world investments do not grow at a fixed, identical rate every single year, as markets fluctuate. However, it is an excellent planning tool for estimating long-term growth averages.