The Rule of 72 is a shortcut or rule of thumb used to estimate the number of years required to double your money at a given annual rate of return and vice versa.

While the rule of 72 is a useful rule of thumb to estimate investment returns, using an online calculator or a compound ...

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If you try to withdraw early from just about any retirement plan, you'll be slapped with a penalty—an incentive to leave your money alone and let it build toward retirement like you always intended.

The Rule of 72 is a simple yet powerful tool for estimating how long it will take for an investment to double at a given annual compound interest rate. By dividing 72 by the interest rate, investors ...