Compound interest is often described as "interest on interest" — unlike simple interest, where you earn the same amount every period, compound interest grows because each period's interest gets added back to the principal, so future interest is calculated on a progressively larger base. This compounding effect is what makes long-term investments grow significantly faster than their simple-interest equivalents.
The formula used is: Amount = Principal × (1 + Rate/(100 × n))^(n × Time) , where n is the number of times interest is compounded per year (1 for annual, 4 for quarterly, 12 for monthly). The more frequently interest compounds, the higher your effective return, even at the same nominal annual rate — this is why the compounding frequency matters when comparing investment or loan products.
This calculator lets you enter your own compounding frequency to see exactly how your investment (or debt) would grow over time, along with a clear breakdown of principal versus interest earned.
For the same nominal annual rate, yes — more frequent compounding (monthly vs. annually, for instance) results in a slightly higher effective annual return, since interest starts earning interest sooner.
Most Indian banks compound FD interest quarterly, though the exact frequency can vary by bank and deposit scheme — always check the specific terms of your FD.
Yes, though most Indian loans (like home and personal loans) use a reducing-balance EMI structure, which is a practical application of compound interest principles applied monthly.
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