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That led to a question from a reader who asked me to explain compound interest.
Albert Einstein is noted for saying that compound interest is “the most powerful force in the universe.”
It gets more powerful the longer you use it. That’s because the money you make on your principal starts making money too.
Let’s look at exactly how it works.
If you begin with $10,000 earning 10% interest, at the end of one year, you have $11,000. The next year, your $11,000 earns 10% – so instead of making $1,000 in interest on $10,000, you’re making $1,100 in interest on $11,000.
That extra $100 may not seem like much – but watch what happens over time.
As you can see in the table above, you start out making $1,000 per year in interest – but as you let the funds compound, that yearly interest builds on itself. By year five, you’re making $1,464 in interest – a 46% increase over the first year – and you have $16,105 at year-end.
By the end of year eight, your account has more than doubled.
In year nine, your interest is more than twice the original $1,000. And after 10 years, you’re making $2,358 in interest and your account is up nearly 160% to $25,937.
As you let compounding work its magic over the years, the numbers start to get crazy. After year 15, you’re earning four times your original interest and your account is worth $45,950.
Notice it took nine years to double your interest payment and eight years to double your account, but only six years to double it again. After 20 years, your interest payment is $6,727 and you have more than $74,000 in principal.
That is the power of compounding. If you simply took out the $1,000 per year in interest and spent it, your savings would never grow and your interest payment would remain at $1,000. After 20 years, you’d still be collecting $1,000 in interest instead of the $6,727 you would be receiving if you had let it compound.
Whether we’re talking about a savings account, an investment account or individual stocks, the longer you can let your money compound, the more money you will make and the more your principal will be worth.
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