Simple vs Compound Interest: What’s the Difference
Simple vs Compound Interest: What’s the Difference
Understand how these two types of interest work and why the difference matters for your money.
Simple Interest in Plain Terms
Simple interest is calculated only on the original principal amount, for the entire length of time. It’s found by multiplying the principal by the interest rate and the time period, which makes it predictable and easy to calculate by hand.
Compound Interest Builds on Itself
Compound interest, by contrast, is calculated on the principal plus any interest that has already been added. Over time, this means your money can grow faster, since you effectively earn interest on your interest.
Where You’ll Encounter Each Type
Simple interest is common in some short-term loans and certain types of bonds, while compound interest is more typical for savings accounts, credit cards and long-term investments. Reading the terms of any financial product will tell you which type applies.
Why the Difference Matters
Over short periods, the difference between simple and compound interest is small, but over many years it can become significant. Understanding which type applies to your loan or savings account helps you plan more accurately for the future.