The Power of Compound Interest (2024)

Investing your money can appear extremely complicated and time-consuming but, once you’ve mastered your current financial situation, it can help you take your finances to the next level. After working at a cupcake shop during my summers in high school, I found myself wanting to invest some of my earnings but was unsure where to start. I had never made any investments before. I thought investing was only something done by professional financial advisors or big corporations. I was really at a loss about where to begin. At the same time, I didn’t want to leave my earnings in a simple savings account because I knew that it could reduce my purchasing power over time. Most savings accounts have interest rates lower than the rate of inflation, so I knew I was at risk to lose some money. I realized that I had to do something.

So how does a high school (and now college) student, who doesn’t know much, go about investing any extra cash they may have? Well, I can tell you what I thought were the most logical steps to take:

  1. I looked up articles and guides about how to start investing in stocks and bonds on Investopedia. Through these readings, I realized that, given my limited knowledge base, I had little interest in actively managing and selecting individual stocks and bonds. So, I turned to learn about passive investments (which select the stocks for you) such as mutual funds.

  1. Once I read up on mutual funds, I learned what a brokerage account was and how to open the account.

After going through that research process, I decided to open a brokerage account with TD Ameritrade and invest in mutual funds. Through the TD Ameritrade phone app, I was provided with suggestions about different mutual funds and selected one that was well diversified (it owned stocks in companies across different industries) and had a decent expected return. Again, since I was choosing to passively manage my money, I wasn’t checking the status of my investments every day but rather every couple weeks or whenever big news stories appeared.

When I reflect back on my initial investing experience, I realized one big takeaway: the power of compound interest. 

When you invest, your account earns compound interest. This means, not only will you earn money on the principal amount in your account, but you will also earn interest on the accrued interest you’ve already earned. The idea of compound interest (as compared to simple interest) is fundamental to investing because it can ultimately lead to a greater return in your account.

For example, I may invest $1000 into a mutual fund and receive an 8% return, during the course of a year, leaving me with an account balance of $1080. Now, with compound interest, if I decide to invest the $1080 into the mutual fund with an 8% return, I will have an account balance of $1,166.40 after the second year. This is different than if I just earned the simple 8% interest on the principal amount of $1000 which would leave me with an account balance of $1160 after two years. Now, just think about if you invested over your whole professional career (assume 35 years) and continued to earn compound interest, you would be returning A LOT of money to your wallet!

All of this is to say, investing can be incredibly beneficial to securing your financial success.

My advice to you: If you’re nervous about investing for the first time and scared about losing your money in the market, that’s extremely valid and okay. With that in mind, you may want to begin investing as early as your financial situation allows for so that you can reap the benefits of compound interest. Also, unless you have the time and are willing to put in the effort to individually select out stocks and bonds, I’d suggest investing in mutual funds that will do the work for you.

Ultimately, how you invest is up to you and your preferences. Above all, I’d encourage you to be mindful of your current financial situation and your risk tolerance for investing.

The Power of Compound Interest (2024)

FAQs

The Power of Compound Interest? ›

In other words, compound interest involves earning, or owing, interest on your interest. The power of compounding helps a sum of money grow faster than if just simple interest were calculated on the principal alone. And the greater the number of compounding periods, the greater the compound interest growth will be.

Why is compound interest so powerful? ›

This means, not only will you earn money on the principal amount in your account, but you will also earn interest on the accrued interest you've already earned. The idea of compound interest (as compared to simple interest) is fundamental to investing because it can ultimately lead to a greater return in your account.

How much is $1000 worth at the end of 2 years if the interest rate of 6% is compounded daily? ›

Hence, if a two-year savings account containing $1,000 pays a 6% interest rate compounded daily, it will grow to $1,127.49 at the end of two years.

What is the miracle of compound interest? ›

Compounding is the process whereby interest is credited to an existing principal amount as well as to interest already paid. Compounding thus can be construed as interest on interest—the effect of which is to magnify returns to interest over time, the so-called “miracle of compounding.”

What is the power of time and compound interest? ›

Compounding is the process of continually adding any earnings you might receive to the amount you contribute (principal) and then reinvesting them to create more potential earnings. The more time your money has to earn, the more opportunity for compounding.

Can compound interest make you rich? ›

The long-term effect of compound interest on savings and investments is indeed powerful. Because it grows your money much faster than simple interest, compound interest is a central factor in increasing wealth. It also mitigates a rising cost of living caused by inflation.

Why is compound interest bad? ›

On the positive side, compound interest makes the return on investments (e.g. savings, retirement accounts) grow quicker and more substantially over time. On the negative side, it makes debt (e.g. credit cards) grow quicker and more substantially over time.

How long will it take $4000 to grow to $9000 if it is invested at 7% compounded monthly? ›

Answer. - At 7% compounded monthly, it will take approximately 11.6 years for $4,000 to grow to $9,000.

How much will $10,000 be worth in 20 years? ›

The table below shows the present value (PV) of $10,000 in 20 years for interest rates from 2% to 30%. As you will see, the future value of $10,000 over 20 years can range from $14,859.47 to $1,900,496.38.

Can I live off interest on a million dollars? ›

Once you have $1 million in assets, you can look seriously at living entirely off the returns of a portfolio. After all, the S&P 500 alone averages 10% returns per year. Setting aside taxes and down-year investment portfolio management, a $1 million index fund could provide $100,000 annually.

What did Warren Buffett say about compound interest? ›

He famously said, “If you aren't thinking about owning a stock for 10 years, don't even think about owning it for 10 minutes.” This aligns perfectly with the principle of compound interest, where the focus is on long-term growth rather than short-term gains.

Did Einstein talk about compound interest? ›

The underlying wisdom of the adage derives from the power of compounding, what Albert Einstein called the eighth wonder of the world. “He who understands it, earns it. He who doesn't, pays it,” he is said to have said.

What two things make compound interest so powerful? ›

The two ingredients to compound interest are time and consistency. Let's dive into each one. Time is your greatest asset when it comes to compounding interest, and the earlier you start, the more time your money has to grow.

What is the rule of 72 power of compounding? ›

The Rule of 72 is a calculation that estimates the number of years it takes to double your money at a specified rate of return. If, for example, your account earns 4 percent, divide 72 by 4 to get the number of years it will take for your money to double. In this case, 18 years.

Why compound interest is more powerful than simple interest? ›

Compound interest causes your wealth to grow faster. It makes a sum of money grow at a faster rate than simple interest because you will earn returns on the money you invest, as well as on returns at the end of every compounding period. This means that you don't have to put away as much money to reach your goals!

Why is compound interest the 8th wonder of the world? ›

It was the renowned scientist and theoretical physicist Albert Einstein who said, “Compound interest is the eighth wonder of the world. He who understands it, earns it … he who doesn't … pays it.” These words are reflected by investor Warren Buffett, who is most associated with the basic wealth building strategy.

Why do investors prefer compound interest? ›

And the money that money makes, makes money.” Compound interest accelerates the growth of your savings and investments over time. Conversely, it also expands the debt balances you owe over time. Here's everything you need to know about what Albert Einstein allegedly called the eighth wonder of the world.

Why does compound interest lead to more money? ›

When an investment pays compound interest, the interest you earn is added back to the original sum, and the new, larger balance earns even more interest. Over time, this can lead to exponential growth, with your investment snowballing and accumulating value faster as time goes on.

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