How long does it take to become a stock market millionaire? How much should you invest each month to reach 1 million euros thanks to compound interest? Is it truly possible to get rich with ETFs or a simple monthly investment plan?
Our free stock market simulator lets you estimate the evolution of your capital based on several parameters: starting capital, monthly contributions, expected annual return, and investment duration. This financial simulation tool allows you to concretely visualize the impact of time, consistency, and compound interest on building wealth.
Whether you invest in stocks, CAC 40 ETFs, or via a programmed investment plan (DCA), time remains one of the most powerful levers in long-term investing. With this investment calculator, you can test different scenarios to know how many years would be needed to reach your wealth objective.
Becoming a millionaire takes time and investment: discover how long with our long-term investment calculator
You don’t become a millionaire overnight. Indeed, you will need an initial investment, and, if possible, additional regular contributions, more or less substantial depending on your possibilities. Still, remember that starting early and staying consistent in your investments will make your base nest egg grow faster.
Investing, unlike simple saving, allows your initial stake to grow significantly thanks to capitalized interest. With compounding, you earn profits through reinvested gains. The snowball effect works at full speed and you accelerate the potential gains of your initial investment, without pressure.
Simulator: how much to invest per month to become a millionaire?
This simulator lets you estimate how long it takes to become a millionaire by investing in the Stock Market thanks to compound interest. You can test different scenarios based on your starting capital, your monthly contributions, and the expected annual return.
Below, we present a simulation of your gains in the Stock Market based on an initially invested amount and possible monthly contributions. If you do not wish to make regular contributions, leave the slider at zero. You will still benefit from the magic of compounded interest. However, regular investing of a fixed amount, however small, will allow you to grow your initial stake even faster. Therefore, it is crucial to invest in the Stock Market regularly.
Our Stock Market tool will allow you to assess the performance of your placements by taking into account the amount initially invested and the amounts you plan to devote to your stock portfolio. You will find, year by year, the amount invested from the start as well as the value of the assets held in the portfolio according to the three scenarios considered.
In how many years will you become a millionaire thanks to the stock market?
The CAC 40, with dividends reinvested, offers a net return, inflation-adjusted, of 6% since its creation in 1988*. We present here a simulation of your gains in the Stock Market based on an initial amount invested of your choice and regular monthly contributions of your choice. The model offers 3 scenarios affecting the CAC40’s annual return** and takes into account a historical annual volatility of 5%***. So, how many years to become a millionaire? We help you find the answer!
5 €
100 €
Stock portfolio evolution for an initial capital investment of 5 euros and monthly contributions of 100 euros
*Average CAC40 Net Return yields since 1988.
**The model is based on three market scenarios. The high scenario assumes an annual return rate of 8%, the medium scenario 6%, and the low scenario 3%. Each year, random volatility is applied to the return according to a centered normal distribution with a standard deviation of 5%.
***Historical average volatility of CAC40 Net Return yields.
Estimating wealth based on CAC40 performance: what scenarios for our millionaire simulator?
Our simulation is based on the performance of the CAC 40 with dividends reinvested since its inception. Since we are not fortune-tellers and cannot predict stock market fluctuations, we reveal three progressively optimistic scenarios, taking into account a historical annual volatility of 5%. Thus, the model proposes three market scenarios: a high scenario with an 8% annual return; a middle scenario of 6%; and a low scenario of 3%. Each year, random volatility is applied to the return according to a centered normal distribution with a 5% standard deviation.
Nevertheless, past performance does not guarantee future results. And this is only a stock market simulation. However, long-term investing should allow you to benefit from the upward trend of equities over the long term.
Monthly investment, DCA, and compound interest: the most realistic method to become a millionaire
In practice, very few investors become millionaires from a single investment made at the right moment. The most effective strategy generally relies on gradual and regular investing over several decades.
This method, called DCA (Dollar-Cost Averaging) or programmed investing, involves investing every month a fixed amount in the stock market, regardless of market conditions. It helps smooth entry points and limit the impact of market fluctuations over the long term.
It is, in fact, the approach used in most automatic investment plans offered by top stock brokers and modern investment platforms. The saver invests every month in diversified instruments such as global equity ETFs, without trying to predict market movements.
The main advantage of this strategy lies in the power of compounded interest. The gains generated by investments are reinvested year after year, which gradually accelerates the growth of capital.
For example, investing €200, €500, or €1,000 per month for 20, 30, or 40 years can lead to very different results depending on the return obtained and the duration of the investment. This is precisely what our Stock Market Simulator makes possible to visualize.
The sooner the investment starts, the more time becomes a powerful ally to gradually build substantial wealth.
To determine how long it will take you to become a millionaire thanks to the Stock Market, use our free Stock Market investment simulator without delay.
You can invest in the CAC 40 or other major stock indices by purchasing an ETF that tracks the index. Becoming a millionaire through an ETF is perhaps the simplest solution, but you can also perform your own stock-picking and select the Paris-listed names that seem most interesting to you and thus hope to beat your reference index.
FAQ: How much to invest in the Stock Market to become a millionaire?
The amount to invest each month to become a millionaire mainly depends on three factors: the return achieved, the investment horizon, and the starting capital. The longer the investment horizon, the more compound interest works in your favor.
For example, taking into account the average returns of the CAC40 Net Return since 1988, you would need to invest around €500 per month for nearly 40 years to reach €1 million starting from nothing under a medium scenario. With €1,000 invested each month, this objective can be reached much faster.
Our Stock Market Simulator precisely lets you test different scenarios based on your monthly saving effort, your starting capital, and your return assumptions.
The required return depends on the time you have and the amount you invest regularly. Historically, major global stock indices have delivered long-term average returns between 7% and 10% per year before inflation.
A return of 7% to 8% per year is often used in long-term investment simulations on diversified equity ETFs. However, these performances are never guaranteed, and financial markets experience periods of both gains and losses.
The aim of the simulator is to help you understand the impact of the annual return on the speed of wealth accumulation through compounded interest.
A CAC 40 ETF allows you to invest in a single operation in the main large French companies listed on the stock market, such as LVMH, TotalEnergies, Sanofi, or Airbus. This type of investment offers simple and diversified exposure to the French equity market, with generally low fees.
Over the long term, regularly investing in a CAC 40 ETF through a monthly investment plan can gradually build a substantial wealth thanks to compound interest. This strategy often relies on Dollar Cost Averaging (DCA), which involves investing a fixed amount each month to smooth out market fluctuations.
Even though past performance never guarantees future results, stocks have historically been one of the best-performing asset classes over long periods. The longer the investment horizon and the more regular the contributions, the greater the growth potential of capital.
Our Stock Market simulator lets you estimate how long it might take to reach €1 million by regularly investing in a CAC 40 ETF.
The information from Cafedelabourse.com and its publications is provided for educational purposes. It does not constitute investment recommendations. Readers should study the risks before performing any transaction. They are solely responsible for their investment decisions.
Past performance does not guarantee future results. Investing in stocks involves the risk of capital loss.
All of our information is, by its nature, generic. It does not take into account your personal situation and does not constitute personalized recommendations for executing transactions and cannot be equated with financial advisory services, nor with any incentive to buy or sell financial instruments. The reader is solely responsible for using the information provided, with no recourse against Cafedelabourse.com’s publishing company. The liability of Cafedelabourse.com’s publishing company cannot be engaged in case of error, omission, or inappropriate investment.
