It’s Never Too Late To Learn Something New
I had a buddy reach out to me the other day, and we were talking through his finances, retirement planning and something came up that I wanted to share. I had mentioned the Rule of 72, a little shortcut to calculate how long it takes for your investments, or retirement accounts to double based on a particular rate of return. This was a new tool for him, and gave him some help in easily seeing future growth of his accounts over time. Seeing where is retirement accounts may be in eight, ten, or perhaps twelve years, for example.
So, I thought it would be fun to share the Rule of 72 concept, a quick and easy formula that can give you an answer without needing a calculator or a finance degree. Perfect for beginners or anyone in the world of investing, this rule helps you understand the power of compounding interest. In this article, we’ll break down the Rule of 72 in a way that’s easy to grasp, and also include some examples that show you just how versatile and handy this financial shortcut can be.
What is the Rule of 72?
The Rule of 72 is a simple mathematical formula used to estimate the number of years required to double the invested money at a given annual rate of return. By dividing 72 by the annual rate of return, investors can get a rough estimate of how many years it will take for their initial investment to grow two-fold.
Why 72? This number is a universal constant in finance that works well with average interest rates and compounding periods, making the math easy enough to do in your head. Plus, it’s remarkably accurate across a wide range of interest rates!
How to Use the Rule of 72?
Using the Rule of 72 is easy with this straightforward formula:
Number of Years to Double = 72 ÷ Interest Rate
Let’s break it down with some examples to see how it works in real life.
Some Examples of The Rule of 72
Example 1:
Saving Account with a 3% Interest Rate
If you put your money in a savings account with an annual interest rate of 3%, how long will it take to double?
Number of Years = 72 ÷ 3 = 24 years
This means it will take approximately 24 years for your money to double in that savings account.
Example 2:
Stock Market Investment with a 9% Return
What if you invest in the stock market and earn an average return of 9% annually? How quickly can you expect your investment to double?
Number of Years = 72 ÷ 9 = 8 years
So, your investment would double in about 8 years, much faster than the savings account!
Example 3:
High-Risk Investment with a 12% Return
For those who like a bit of risk, let’s say you find an investment that promises a wicked-high 12% return annually. Using the Rule of 72:
Number of Years = 72 ÷ 12 = 6 years
Your money would double in just 6 years, showing how higher returns can significantly decrease the time it takes to grow your investment.
Why the Rule of 72 Matters
The Rule of 72 is more than just a party trick; it’s a valuable lesson in the power of compounding interest and investment growth. It teaches you the importance of the rate of return and how investing your money can help it grow over time. Plus, it’s a great way to make quick comparisons between different investment opportunities without getting bogged down in complex calculations.
Whether you’re saving up for a car, college, that overseas metal festival you hope to goto someday, or just trying to understand how investing works, the Rule of 72 is a handy tool to have in your financial toolkit. It simplifies the complex world of finance into something more manageable, helping you make informed decisions about where to put your money. Remember, the sooner you start investing, the more you can take advantage of the power of compounding interest. So why wait? Dive into the world of investing with the Rule of 72 as your guide!
Remember, while the Rule of 72 provides a quick estimate, always consider consulting with a financial advisor for detailed investment advice tailored to your personal situation. Happy investing and keep those Horns Up, my friends! \m/ \m/
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