If you want to double your money, the rule of 72 shows you how to do so in about seven years without taking on too much risk.

If you invest at an 8% return, you will double your money every 9 years.

(72/8 = 9) If you invest at a 7% return, you will double your money every 10.2 years.

## What is the 7 year rule for investing?

The rule says that to find the number of years required to double your money at a given interest rate, you just divide the interest rate into 72. For example, if you want to know how long it will take to double your money at eight percent interest, divide 8 into 72 and get 9 years.

## How long does it take for 401k to double?

For example, if you invest $10,000 at 10 percent compound interest, then the “Rule of 72” states that in 7.2 years you will have $20,000. You divide 72 by 10 percent to get the time it takes for your money to double. The “Rule of 72” is a rule of thumb that gives approximate results.

## What interest rate will double money in 10 years?

To use the Rule of 72 in order to determine the approximate length of time it will take for your money to double, simply divide 72 by the annual interest rate. For example, if the interest rate earned is 6%, it will take 12 years (72 divided by 6) for your money to double.

## How often does the stock market double?

At 12%, you could double your initial investment every six years (72 divided by 12). In a less-risky investment such as bonds, which Standard and Poor’s says have averaged about 6% over the same time period, you could expect to double your money in about 12 years (72 divided by 6).