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the first interest period is the same as for simple interest. However, for further interest periods, the
amount of compound interest increases to an amount greater than simple interest.
To illustrate:
Simple Interest
Compound Interest
Year 1
$100 * 10% =
$10
$100 * 10% =
$10
Year 2
$100 * 10% =
$10
$110 * 10% =
$11
Year 3
$100 * 10% =
$10
$121 * 10% =
$12.10
Total Interest
$30
$33.10
From the illustration above, you can see that under simple interest payments, a yearly sum of $10 is
gained through interest. For
each year of the loan period, $10 is earned. However, under
compound interest payments, the yearly interest is added to the principle for the next period. This
has the effect of increasing interest earned each year for the duration of the period (note: in example
above, $33.10 earned from compound interest versus $30 earned from simple interest).
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