What if I invest $200 a month for 20 years?
Bottom Line. If you can invest $200 each and every month and achieve a 10% annual return, in 20 years you'll have more than $150,000 and, after another 20 years, more than $1.2 million. Your actual rate of return may vary, and you'll also be affected by taxes, fees and other influences.
How that works, in practice: Let's say you invest $200 every month for 10 years and earn a 6% average annual return. At the end of the 10-year period, you'll have $33,300. Of that amount, $24,200 is money you've contributed — those $200 monthly contributions — and $9,100 is interest you've earned on your investment.
On average, the stock market yields between an 8% to 12% annual return. Investing $100 per month, with an average return rate of 10%, will yield $200,000 after 30 years. Due to compound interest, your investment will yield $535,000 after 40 years.
Rate of return | 10 years | 40 years |
---|---|---|
4% | $72,000 | $570,200 |
6% | $79,000 | $928,600 |
8% | $86,900 | $1,554,300 |
10% | $95,600 | $2,655,600 |
Now, let's consider how our calculations change if the time horizon is 10 years. If you are starting from scratch, you will need to invest about $4,757 at the end of every month for 10 years. Suppose you already have $100,000. Then you will only need $3,390 at the end of every month to become a millionaire in 10 years.
In order to hit your goal of $1 million in 10 years, SmartAsset's savings calculator estimates that you would need to save around $7,900 per month. This is if you're just putting your money into a high-yield savings account with an average annual percentage yield (APY) of 1.10%.
Discount Rate | Present Value | Future Value |
---|---|---|
17% | $100 | $2,310.56 |
18% | $100 | $2,739.30 |
19% | $100 | $3,242.94 |
20% | $100 | $3,833.76 |
Given an average 10% rate of return on the S&P 500, you need to save about $1,400 per month in order to save up $1 million over 20 years. That's a lot of money, but the good news is that changing the variables even a little bit can make a big difference.
Discount Rate | Present Value | Future Value |
---|---|---|
4% | $1,000 | $2,191.12 |
5% | $1,000 | $2,653.30 |
6% | $1,000 | $3,207.14 |
7% | $1,000 | $3,869.68 |
Is $200 a month good for investing?
Many retirement planners suggest using a more modest annual return of 6% when forecasting the long-term performance of a portfolio. At 6%, after 20 years the $200-a-month portfolio would be worth $93,070. After 40 years earning the same return, your model portfolio would be up to about $398,000.
To be precise, you'd need an investment of $900,000. This is calculated as follows: $3,000 X 12 months = $36,000 per year. $36,000 / 4% dividend yield = $900,000.

Here's how much 45-year-olds would need to invest each month to become a millionaire by the traditional retirement age: If making investments that yield a 3% yearly return, a 45-year-old would have to invest $3,100 per month to reach $1 million by age 65.
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Monthly contribution | Time to reach $1 million with an 8% annual return |
---|---|
$250 | 41.6 years |
$500 | 33.3 years |
$1,000 | 25.5 years |
$2,500 | 16.3 years |
Investment Return | Future Value of 30,000 in 20 Years |
---|---|
5% | 79,599 |
5.25% | 83,476 |
5.5% | 87,533 |
5.75% | 91,776 |
How long will it take to turn 500k into $1 million? The time it takes to invest half turn 500k into $1 million depends on the investment return and the amount of time invested. If invested with an average annual return of 7%, it would take around 15 years to turn 500k into $1 million.
$2.2 million
That's how much net worth an American needs to be considered wealthy in 2023, according to the Charles Schwab Modern Wealth Survey.
Discount Rate | Future Value | Present Value |
---|---|---|
4% | $10,000 | $6,755.64 |
5% | $10,000 | $6,139.13 |
6% | $10,000 | $5,583.95 |
7% | $10,000 | $5,083.49 |
But not even 7% of people 60 and over have that saved, says LIMRA. More workers would like guaranteed sources of lifetime income.
Can I live off interest on a million dollars?
We have already proven that a person can live comfortably with interest earned by investing one million dollars. Still, for many, this may not be enough. In that case, 2 million dollars may be a more appropriate amount of money to retire with.
You have to remember that when you retire, you are looking to stay that way for the rest of your life. So stretching $1 million for the next 25 to 30 years at least may not be enough for some people. Here are tasks that every retiree has to put into consideration.
The table below shows the present value (PV) of $3,000 in 20 years for interest rates from 2% to 30%. As you will see, the future value of $3,000 over 20 years can range from $4,457.84 to $570,148.91.
The value of the $1 million today is the value of $1 million discounted at the inflation rate of 3.2% for 40 years, i.e., 1 , 000 , 000 ( 1 + 3.2 % ) 40 = 283 , 669.15.
If you invest $10,000 and make an 8% annual return, you'll have $100,627 after 30 years. By also investing $500 per month over that timeframe, your ending balance would be $780,326. Exchange-traded funds (ETFs) and mutual funds are both excellent investment options.