The Power of Compounding Interest

Forumla for Compound Interest
What is compound interest and why is it so important? 

Simply put, compound interest is when your principal investment earns interest and from that moment on, you earn interest on the principal and all prior accrued interest.


Let's take a look at some real numbers to help you understand the importance of compounding interest and why it may well be your most valuable tool in saving for retirement.






Below, I am comparing Person 1 vs. Person 2, the age and length of when they invest and how much each person will have at retirement.

As you can see, if Person 1 only invests from 18 years of age to 28 (10 years) AND STOPS, Person 1 will have $90,711 more compared to Person 2 who starts investing from 29 years of age to 65 (36 years).  Eventhough Person 2 has invested 3.5 x's longer. This is the POWER OF COMPOUNDING INTEREST!




The Power of Compounding Interest



So, as you can see from the illustration above, the sooner you start saving, the more you'll have for retirement.


3 comments:

  1. Charlie -- You might want to check your formulas there. For person 1, year 2 would be interest on 1,080 plus 1000 plus interest on that amount or $2,246. At the end, Person 1 has $310,027 and Person 2 has $219,316 and your point definitely still stands!

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    1. Thank you, Anonymous, for catching that error! I have fixed the chart and now this post has a happier ending as both, Person 1 and Person 2 ends up with more money thus emphasizing even more, the power of compounding interest!

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