Simple Interest vs Compound Interest: Key Differences Explained
Last updated: 2026-09-11 • Editorial Staff
Interest is the cost of borrowing money or the reward earned on saved capital.
The key difference between simple interest and compound interest lies in whether interest is earned strictly on the initial principal or also on previously accumulated interest.
Simple Interest vs Compound Interest Comparison
Simple Interest is linear: Interest = Principal × Rate × Time / 100.
Compound Interest is exponential: Amount = Principal × (1 + Rate/n)^(n × Time).
Over long time horizons, compound interest generates dramatically higher returns due to the compounding multiplier effect.
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