3 Investing Tricks to Double Your Money

Doubling your money is very achievable — you may even double it twice, if you take these tips to heart.

Sept. 24, 2020

This article originally appeared on The Motley Fool, written by Selena Maranjian.

“Step right up! Double your money!” It sounds like a scam or a carnival barker, right? But doubling your money isn’t just a pipe dream, or something that only happens over many decades.

Here are three strategies for doubling your money. Ideally, you’ll be able to double it — and then double it again!

No. 1: Invest for a long time — and regularly

Sure, you can double your money over several decades, but that’s if your money is growing at a rather slow rate, such as if it’s in a bank savings account, money market account, or certificates of deposit. You can probably do better than that, such as by investing in stocks.

Also, invest regularly. If you’re aiming for a nest egg sufficient to support you in retirement, it’s probably not going to be good enough to invest a chunk of money once and then wait for it to grow, or to add to it occasionally, whenever you have some extra cash. Ideally, you should be socking away money regularly — perhaps every month or quarter — and meaningful sums, too.

It needn’t take many decades to double your money, but it will take some time — and determination. Check out the table below:

Growing at 8% for $5,000 invested annually $10,000 invested annually $15,000 invested annually
10 years $78,227 $156,455 $234,682
15 years $146,621 $293,243 $439,864
20 years $247,115 $494,229 $741,344
25 years $394,772 $789,544 $1.2 million
30 years $611,729 $1.2 million $1.8 million


No. 2: Aim for a solid growth rate

Clearly, your money will need to be growing at a good clip if you want to double your money in a not-too-long period. For most people, stocks are the best bet for long-term growth, and the table below, reflecting the research of Jeremy Siegel who studied returns from 1802 to 2012, shows that:

Asset Class Annualized Nominal Return
Stocks 8.1%
Bonds 5.1%
Bills 4.2%
Gold 2.1%
U.S. dollar 1.4%


You might do even better than 8% in your investing, and the table below shows how long it takes to double your money at different growth rates. It’s illustrating the “Rule of 72,” where you divide 72 by your growth rate, and the result is the number of years it will take for your money to double:

Growth Rate Years to Double
2% 36.0
3% 24.0
5% 14.4
7% 10.3
10% 7.2
12% 6.0
15% 4.8
20% 3.6
25% 2.9


The handy rule is surprisingly accurate much of the time, but it gets less so at growth rates above 25% or so.

No. 3: Avoid money-losing blunders

Finally, as you diligently save and invest in stocks regularly over many years, aim to avoid as many blunders as possible. There are lots of common investing mistakes to avoid, such as not understanding what you’re investing in or trading too frequently. There are also some risky investment strategies and techniques to avoid, such as buying into penny stocks or investing with margin.

The more errors you avoid, the less money you’ll likely lose, and the faster you’ll see your portfolio grow. For best results, keep reading and learning about investing throughout your financial life.

MyWallSt operates a full disclosure policy. MyWallSt staff currently hold long positions in companies mentioned above. Read our full disclosure policy here.

Sean Williams has no position in any of the stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. The Motley Fool has a disclosure policy.