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What is the rule of 72?

Quick Answer

The rule of 72 estimates how many years it takes for an investment to double, given a fixed annual return: 72 ÷ rate = years. At 8% return, money doubles every 9 years (72/8). At 6%, every 12 years.

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Warren Team
Updated December 2, 2025
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The information provided is for educational purposes only and should not be considered as personalized financial advice. Warren is a registered investment advisor. Past performance does not guarantee future results. Please consult with a qualified financial advisor before making investment decisions.

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