How Long Will It Take to Make a Million Dollars Investing in Stock?

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Investing in the financial markets is one of the best long-term approaches to wealth. But at a slow and steady pace, many investors probably wonder: how long will it take to make a million dollars in stock?

Since 1928, the S&P 500 — a representation of the U.S. stock market — rewarded investors with 9.53 percent annualized returns. And since 1967, investors enjoyed a 10.09 percent annualized return.

But just in case this makes you get giddy with enthusiasm, S&P 500 returns were only 6.88 percent between 2007-2016.

Experts will tell you that the beauty of stock market investing is guided by one simple strategy: the magic of compounding. The value of your initial investment grows exponentially over time. In simple terms, compounding is the cycle of generating additional returns on the money that you previously invested.

To get a clearer idea, let’s look at how these S&P 500 return percentages work out in real dollars. Imagine that you invested $100 in the S&P 500 in 1928. Here’s what it would be worth during future time periods:


















$113, 030.22





Notice that at the end of 1928, your $100 would have surged in value to $143.81. Yet, 10 years later, in 1938, the value dropped to $121.53.

Ultimately, in 2016, your initial $100 would have grown to over $328,000.

Despite the lofty annualized investment returns, during individual years, returns vary. Since the turn of the century the lowest annual return year was 2008 with a -36.55 percent, annualized decline. While 2013 saw a 32.15 percent increase in value.

 During the prior 16 years, there were four negative return years and 13 positive return years in the S&P 500:


S&P 500

3-month T.Bill

10-year T. Bond


-9.03 Percent

5.76 Percent

16.66 Percent


-11.85 Percent

3.67 Percent

5.57 Percent


-21.97 Percent

1.66 Percent

15.12 Percent


28.36 Percent

1.03 Percent

0.38 Percent


10.74 Percent

1.23 Percent

4.49 Percent


4.83 Percent

3.01 Percent

2.87 Percent


15.61 Percent

4.68 Percent

1.96 Percent


5.48 Percent

4.64 Percent

10.21 Percent


-36.55 Percent

1.59 Percent

20.10 Percent


25.94 Percent

0.14 Percent

-11.12 Percent


14.82 Percent

0.13 Percent

8.46 Percent


2.10 Percent

0.03 Percent

16.04 Percent


15.89 Percent

0.05 Percent

2.97 Percent


32.15 Percent

0.07 Percent

-9.10 Percent


13.52 Percent

0.05 Percent

10.75 Percent


1.38 Percent

0.21 Percent

1.28 percent


11.74 Percent

0.51 Percent

0.69 Percent

If these historic norms hold true, investing in the stock market over the long-term will yield tremendous financial rewards.

How Long Until You’re a Millionaire

Based on the returns from previous years, let's find out how long it’ll take you to reach a million dollars if you invest $5,000, $10,000 or $20,000 in an S&P 500 index fund. The tricky part of this calculation is choosing a future rate of return.

Going forward, we’ll use a projected 8.5 percent long term annualized return. By averaging the 10.09 percent returns from 1967-2016 with the lower 2007-2016 return of 6.88 percent we decided on a reasonable compromise 8.5 percent future return. Additionally, as the U.S. industrial base matures and GDP growth slows, it’s reasonable to expect future stock market returns to temper.

Annual Investment AmountYears to $1 Million
*Assumes 8.5 percent compounded annual rate of return 

If you begin investing in the stock market at age 30, you only need to contribute $5,000 annually to hit the million-dollar mark by age 65.

Comparatively, if you wait until you’re age 45, to reach that same $1 million by age 65, you will have to pony up $20,000 per year. That’s a difference of $1,667 monthly for the 45-year-old versus $416 per month for the 30-year-old.

If becoming a millionaire is your goal, then investing in the stock market could be a gainful path. But as the numbers show, investing in the markets isn’t a get-rich-quick scheme. Financial planning experts will remind you that stocks are a long-term route to wealth building.

Finally, before diving into the financial markets, make certain to save up some emergency cash, so you’re not forced to withdraw money from the markets during a downturn.

Barbara A. Friedberg is a former portfolio manager and university investments instructor. Her writing appears on various websites including Robo-Advisor and Barbara Friedberg Personal Finance.