# The Rule of 72 | Phil Town | Summary and Q&A

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January 12, 2017
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The Rule of 72 | Phil Town

## TL;DR

The Rule of 72 is a simple mathematical shortcut that helps calculate how long it takes to double your money with a fixed interest rate.

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### Q: What is the Rule of 72 and how does it work?

The Rule of 72 is a shortcut that helps determine how long it takes to double your money with compound interest. By dividing 72 by the rate of return, you can find the number of years it will take to double the initial investment.

### Q: How can the Rule of 72 help with investment decisions?

The Rule of 72 can be used to assess the potential growth of an investment. By knowing how long it will take to double your money, you can evaluate whether the investment aligns with your financial goals and desired rate of return.

### Q: Can the Rule of 72 be used for different types of investments?

Yes, the Rule of 72 can be applied to any investment that involves compound interest. It can be used for stocks, bonds, real estate, or any other investment that offers a fixed rate of return.

### Q: What are the limitations of the Rule of 72?

The Rule of 72 assumes a fixed interest rate and does not account for fluctuations or unpredictable market conditions. It provides a rough estimate and should be used as a starting point for financial planning.

## Summary & Key Takeaways

• The Rule of 72 is a useful tool for understanding compound interest and how it can help grow your portfolio or investments.

• By dividing the number of years it takes to double your money into 72, you can determine the compounded annual growth rate.

• The Rule of 72 can also be used to calculate how long it will take to double your money based on a desired rate of return.